LTC4151CMS-1#TRPBF [Linear]
LTC4151 - High Voltage I<sup>2</sup>C Current and Voltage Monitor; Package: MSOP; Pins: 10; Temperature Range: 0°C to 70°C;
| 型号： | LTC4151CMS-1#TRPBF |
| 厂家： | 
Linear |
| 描述： | LTC4151 - High Voltage I<sup>2</sup>C Current and Voltage Monitor; Package: MSOP; Pins: 10; Temperature Range: 0°C to 70°C 光电二极管 |
| 文件： | 总18页 (文件大小：436K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC4151
High Voltage I C Current
and Voltage Monitor
2
FeaTures
DescripTion
The LTC®4151 is a high side power monitor that operates
overawidevoltagerangeof7Vto80V.Indefaultoperation
mode, the onboard 12-bit ADC continuously measures
high side current, input voltage and an external voltage.
n
Wide Operating Voltage Range: 7V to 80V
n
12-Bit Resolution for Both Current and Voltages
2
n
I C Interface
n
Additional ADC Input Monitors an External Voltage
2
n
Continuous Scan and Snapshot Modes
Data is reported through the I C interface when polled
n
Shutdown Mode (LTC4151) Reduces Quiescent
by a host. The LTC4151 can also perform on-demand
measurement in a snapshot mode. The LTC4151 features
a dedicated shutdown pin to reduce power consumption.
Current to 120µA
n
Split SDA for Opto-Isolation (LTC4151-1/LTC4151-2)
2
n
Available in 10-Lead MSOP, 10-Lead 3mm × 3mm
The LTC4151-1/LTC4151-2 feature split I C data pins to
drive opto-isolators. The data out on the LTC4151-1 is
inverted while that on the LTC4151-2 is not.
DFN and 16-Lead SO Packages
applicaTions
PART
PACKAGE
DD10, MS10
DD10, MS10
S16
FEATURED PIN
SHDN
n
LTC4151
LTC4151-1
LTC4151-2
–48V Telecom Infrastructure
n
Automotive
SDAO
n
Industrial
Consumer
SDAO
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
12-Bit ADC DNL and INL
Typical applicaTion
1.0
0.5
0
High Side Power Sensing with Onboard ADC and I2C
3.3V
0.02Ω
V
IN
7V TO 80V
–0.5
–1.0
V
OUT
V
DD
2k
2k
+
–
SENSE SENSE
µCONTROLLER
SCL
SDA
V
SHDN
SCL
IN
2048
0
3072
4096
1024
LTC4151
GND
CODE
4151 TA01b
SDA
ADR1
ADR0
1.0
0.5
GND
MEASURED
VOLTAGE
4151 TA01
ADIN
0
–0.5
–1.0
0
2048
3072
4096
1024
CODE
4151 TA01c
4151ff
For more information www.linear.com/LTC4151
1
LTC4151
(Notes 1, 3)
absoluTe MaxiMuM raTings
V Voltage.................................................–0.3V to 90V
Operating Temperature Range
IN
+
–
SENSE , SENSE Voltages...........................V – 10V or
LTC4151C/LTC4151C-1/LTC4151C-2 ......... 0°C to 70°C
LTC4151I/LTC4151I-1/LTC4151I-2.........–40°C to 85°C
LTC4151H........................................... –40°C to 125°C
Storage Temperature Range
IN
–0.3V to V + 0.3V
IN
ADR1, ADR0 Voltages .............................. –0.3V to 90V
ADIN, SHDN, SDAO, SDAO Voltages........... –0.3V to 6V
SCL, SDA, SDAI Voltages (Note 2)........... –0.3V to 5.5V
SCL, SDA, SDAI Clamp Current............................... 5mA
MSOP, SO ..........................................–65°C to 150°C
DFN.................................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
MSOP, SO .........................................................300°C
pin conFiguraTion
LTC4151
LTC4151
TOP VIEW
+
–
TOP VIEW
SENSE
1
2
3
4
5
10 SENSE
+
–
SENSE
V
10
9
SENSE
GND
SHDN
SDA
SCL
1
2
3
4
5
V
9
8
7
6
GND
SHDN
SDA
SCL
IN
IN
ADR1
ADR0
ADIN
11
ADR1
ADR0
ADIN
8
7
6
MS PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
T
= 150°C, θ = 85°C/W
JMAX
JA
T
= 150°C, θ = 45°C/W
JA
JMAX
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
LTC4151-1
LTC4151-1
TOP VIEW
+
–
TOP VIEW
SENSE
1
2
3
4
5
10 SENSE
+
–
SENSE
10
9
SENSE
GND
SDAO
SDAI
SCL
1
2
3
4
5
V
9
8
7
6
GND
SDAO
SDAI
SCL
IN
V
IN
11
ADR1
ADR0
ADIN
ADR1
ADR0
ADIN
8
7
6
MS PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
T
= 125°C, θ = 85°C/W
JA
JMAX
T
= 125°C, θ = 45°C/W
JA
JMAX
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
LTC4151-2
TOP VIEW
+
–
SENSE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SENSE
NC
V
IN
NC
NC
NC
GND
SDAO
SDAI
SCL
ADR1
NC
ADR0
NC
ADIN
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 150°C, θ = 100°C/W
JA
4151ff
For more information www.linear.com/LTC4151
2
LTC4151
orDer inForMaTion
LEAD FREE FINISH
LTC4151CDD#PBF
LTC4151IDD#PBF
LTC4151HDD#PBF
LTC4151CDD-1#PBF
LTC4151IDD-1#PBF
LTC4151CMS#PBF
LTC4151IMS#PBF
LTC4151HMS#PBF
LTC4151CMS-1#PBF
LTC4151IMS-1#PBF
LTC4151CS-2#PBF
LTC4151IS-2#PBF
TAPE AND REEL
PART MARKING*
LCWZ
PACKAGE DESCRIPTION
TEMPERATURE RANGE
0°C to 70°C
LTC4151CDD#TRPBF
LTC4151IDD#TRPBF
LTC4151HDD#TRPBF
LTC4151CDD-1#TRPBF
LTC4151IDD-1#TRPBF
LTC4151CMS#TRPBF
LTC4151IMS#TRPBF
LTC4151HMS#TRPBF
LTC4151CMS-1#TRPBF
LTC4151IMS-1#TRPBF
LTC4151CS-2#TRPBF
LTC4151IS-2#TRPBF
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
LCWZ
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LCWZ
LCXC
LCXC
–40°C to 85°C
0°C to 70°C
LTCWY
LTCWY
10-Lead Plastic MSOP
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTCWY
10-Lead Plastic MSOP
LTCXB
10-Lead Plastic MSOP
LTCXB
10-Lead Plastic MSOP
–40°C to 85°C
0°C to 70°C
LTC4151S-2
LTC4151S-2
16-Lead Plastic SO
16-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
The l denotes the specifications which apply over the full operating
elecTrical characTerisTics
temperature range, otherwise specifications are at TA = 25°C. VIN is from 7V to 80V, unless noted. (Note 3)
SYMBOL
General
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
V
Supply Voltage
Supply Current
7
80
V
IN
l
l
I
IN
V
V
= 48V, Normal Operation Mode
= 12V, Shutdown Mode
1.2
1.7
300
mA
µA
IN
IN
120
+
+
–
+
–
l
l
l
l
I
I
SENSE Input Current
V , SENSE , SENSE = 48V
IN
5
9
1
µA
µA
V
SENSE
–
+
–
SENSE Input Current
V , SENSE , SENSE = 48V
IN
0.1
1.5
–5
SENSE
V
SHDN Input Threshold
SHDN Input Current
1
2
SHDN(TH)
I
SHDN = 0V
–3
–8
µA
SHDN
ADC
l
RES
Resolution (No Missing Codes)
Full-Scale Voltage
(Note 4)
12
Bits
+
–
V
FS
(SENSE – SENSE )
81.92
102.4
2.048
mV
V
V
V
IN
ADIN
+
–
LSB
TUE
LSB Step Size
(SENSE – SENSE )
20
25
0.5
µV
mV
mV
V
IN
ADIN
+
–
l
l
l
l
Total Unadjusted Error
(SENSE – SENSE )
1.25
1
%
%
%
%
V
(Note 5)
IN
ADIN, C-Grade
0.75
1
ADIN, I-, H-Grade
+
–
l
l
l
V
OS
Offset Error
(SENSE – SENSE )
V
ADIN
5
6
8
LSB
LSB
LSB
(Note 6)
IN
4151ff
For more information www.linear.com/LTC4151
3
LTC4151
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN is from 7V to 80V, unless noted. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
+
–
l
l
l
INL
Integral Nonlinearity
(SENSE – SENSE )
1
1
0.5
3
3
2
LSB
LSB
LSB
V
(Note 5)
IN
ADIN
+
–
Transition Noise
(SENSE – SENSE )
V
ADIN
1.2
0.3
22
µV
mV
µV
RMS
RMS
RMS
s T
IN
l
f
t
Conversion Rate (Continuous Mode)
Conversion Time (Snapshot Mode)
6
7.5
9
Hz
CONV
+
–
l
l
(SENSE – SENSE )
ADIN, V
53
26
67
33
85
42
ms
ms
CONV
IN
l
l
R
ADIN Pin Input Resistance
ADIN Pin Input Current
ADIN = 3V
ADIN = 3V
2
10
MW
µA
ADIN
I
2
ADIN
2
I C Interface
l
l
V
V
ADR0, ADR1 Input High Threshold
ADRO, ADRI Input Low Threshold
ADRO, ADRI Input Current
2.3
0.2
2.65
0.6
3.0
0.9
70
V
V
ADR(H)
ADR(L)
ADR(IN)
l
l
I
ADR0, ADR1 = 0V or 3V
ADR0, ADR1 = 0.8V or 2.2V
µA
µA
8
l
l
V
SDA, SDAO, SDAO Output Low Voltage
I
, I , I = 8mA
SDA SDAO SDAO
0.15
0
0.4
2
V
SDA(OL)
I
SDA, SDAI, SDAO, SDAO, SCL Input
Current
SDA, SDAI, SDAO, SDAO, SCL = 5V
µA
SDA,SCL(IN)
l
l
V
V
SDA, SDAI, SCL Input Threshold
SDA, SDAI, SCL Clamp Voltage
1.6
5.5
1.8
6.1
2
V
V
SDA,SCL(TH)
I
, I
, I
= 3mA
6.6
SDA,SCL(CL)
2
SDA SDAI SCL
I C Interface Timing (Note 4)
f
t
t
t
Maximum SCL Clock Frequency
Minimum SCL Low Period
Minimum SCL High Period
400
kHz
µs
SCL(MAX)
LOW
0.65
50
1.3
600
1.3
ns
HIGH
Minimum Bus Free Time Between Stop/
Start Condition
0.12
µs
BUF(MIN)
t
t
Minimum Hold Time After (Repeated) Start
Condition
140
30
600
600
ns
ns
HD,STA(MIN)
Minimum Repeated Start Condition Set-Up
Time
SU,STA(MIN)
t
t
t
t
t
Minimum Stop Condition Set-Up Time
Minimum Data Hold Time Input
Minimum Data Hold Time Output
Minimum Data Set-Up Time Input
30
–100
600
30
600
0
ns
ns
ns
ns
ns
SU,STO(MIN)
HD,DATI(MIN)
HD,DATO(MIN)
SU,DAT(MIN)
SP(MAX)
300
900
100
250
Maximum Suppressed Spike
Pulse Width
50
20
110
t
Stuck-Bus Reset Time
SCL or SDA/SDAI Held Low
33
5
ms
pF
RST
C
SCL, SDA Input Capacitance
10
X
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 3: All currents into pins are positive. All voltages are referenced to
GND, unless otherwise noted.
Note 4: Guaranteed by design and not subject to test.
Note 5: Integral nonlinearity and total unadjusted error of V are tested
IN
Note 2: Internal clamps limit the SCL, SDA (LTC4151) and SDAI
(LTC4151-1/LTC4151-2) pins to a minimum of 5.5V. Driving these pins to
voltages beyond the clamp may damage the part. The pins can be safely
tied to higher voltages through a resistor that limits the current below
5mA.
between 7V and 80V.
Note 6: Offset error of V is defined by extrapolating the straight line
measured between 7V and 80V.
IN
4151ff
For more information www.linear.com/LTC4151
4
LTC4151
Typical perForMance characTerisTics
VIN = 12V, TA = 25°C, unless noted.
Supply Current vs Supply Voltage
(Normal Mode)
Supply Current vs Supply Voltage
(Shutdown Mode)
1.30
1.15
1.00
0.85
0.70
400
300
200
100
0
–40°C
25°C
–40°C
25°C
85°C
85°C
40
60
0
80
20
40
SUPPLY VOLTAGE (V)
0
60
80
20
SUPPLY VOLTAGE (V)
4151 G01
4151 G02
ADC Total Unadjusted Error
vs Code (ADIN Voltage)
ADC DNL vs Code (ADIN Voltage)
ADC INL vs Code (ADIN Voltage)
0.10
0.05
0
1.0
0.5
1.0
0.5
0
0
–0.05
–0.10
–0.5
–1.0
–0.5
–1.0
2048
3072
2048
3072
0
4096
2048
0
4096
1024
0
3072
4096
1024
1024
CODE
CODE
CODE
4151 G03
4151 G05
4151 G04
ADC Total Unadjusted Error
vs Code (SENSE Voltage)
ADC DNL vs Code (SENSE Voltage)
ADC INL vs Code (SENSE Voltage)
1.0
0.5
2
1
2
1
0
0
0
–0.5
–1.0
–1
–2
–1
–2
2048
3072
0
4096
1024
2048
3072
2048
3072
0
4096
0
4096
1024
1024
CODE
CODE
CODE
4151 G06
4151 G07
4151 G08
4151ff
For more information www.linear.com/LTC4151
5
LTC4151
Typical perForMance characTerisTics
SDA, SDAO, SDAO Output Low vs
VIN = 12V, TA = 25°C, unless noted.
SDA, SDAI, SCL Clamp Voltage
vs Load Current
Pull-Up Current (VSDA(OL) vs ISDA
)
0.5
0.4
0.3
0.2
0.1
0
6.3
6.2
6.1
6.0
5.9
85°C
25°C
–40°C
–40°C
25°C
85°C
10
(mA)
15
0
20
5
0.01
0.1
1
10
I
I
(mA)
SDA
LOAD
4151 G09
4151 G10
pin FuncTions
ADIN: ADC Input. The onboard ADC measures voltage
range between 0V and 2.048V. Tie to GND if unused.
outputfromamastercontroller.Anexternalpull-upresistor
or current source is required and can be placed between
SDAI and V . If the master separates SDAI and SDAO,
2
IN
ADR1, ADR0: I C Device Address Inputs. Connecting
data read at SDAO needs to be echoed back to SDAI for
ADR1 and ADR0 to V , GND or leaving the pins open
IN
2
properI Ccommunication.ThevoltageatSDAIisinternally
configures one of nine possible addresses. See Table 1
clamped to 6V (5.5V minimum).
in the Applications Information section for details.
SDAO (LTC4151-2 Only): Serial Bus Data Output. Open-
drain output used for sending data back to the master
controller or acknowledging a write operation. Normally
tied to SDAI to form the SDA line. An external pull-up
resistor or current source is required.
Exposed Pad (DD Package Only): Exposed pad may be
left open or connected to device ground (GND).
GND: Device Ground.
2
SCL: I C Bus Clock Input. Data is shifted in and out at
the SDA pin on rising edges of SCL. This pin is driven
by an open-collector output from a master controller. An
external pull-up resistor or current source is required and
SDAO (LTC4151-1 Only): Inverted Serial Bus Data Out-
put. Open-drain output used for sending data back to the
mastercontrolleroracknowledgingawriteoperation.Data
is inverted for convenience of opto-isolation. An external
pull-up resistor or current source is required.
can be placed between SCL and V . The voltage at SCL
IN
is internally clamped to 6V (5.5V minimum).
2
+
SDA (LTC4151 Only): I C Bus Data Input/Output. Used
SENSE : Kelvin Sense of the V Pin. See Figure 10 for
IN
for shifting in address, command or data bits and sending
out data. An external pull-up resistor or current source
recommended Kelvin connection.
–
SENSE : High Side Current Sense Input. Connect an
is required and can be placed between SDA and V .
IN
+
–
external sense resistor between SENSE and SENSE .
The voltage at SDA is internally clamped to 6V (5.5V
+
–
The differential voltage between SENSE and SENSE is
monitored by the onboard ADC with a full-scale sense
voltage of 81.92mV.
minimum).
2
SDAI (LTC4151-1/LTC4151-2 Only): I C Bus Data Input.
Used for shifting in address, command, data, and SDAO
acknowledge bits. This pin is driven by an open-collector
4151ff
For more information www.linear.com/LTC4151
6
LTC4151
pin FuncTions
SHDN (LTC4151 Only): Shutdown Input. Internally pulled
up to 6.3V. Pull this pin below 1V to force the LTC4151
into shutdown mode. Leave this pin open if unused.
V : Supply Voltage Input. Accepts 7V to 80V. The voltage
IN
at this pin is monitored by the onboard ADC with a full-
+
scale input range of 102.4V. SENSE must be connected
to V for proper ADC readout.
IN
block DiagraM
R
S
V
IN
+
–
6.3V
SENSE
SENSE
ADR1
ADR0
SHDN
(LTC4151)
2k
5µA
+
–
DECODER
25X
SHUTDOWN
CONTROL
INTERNAL
POWER
SDAO/SDAO
(LTC4151-1/
LTC4151-2)
V
= 2.048V
REF
735k
2
I C/
REGISTERS
SDA/SDAI
6V
12-BIT ADC
MUX
(LTC4151/
LTC4151-1)
15k
SCL
6V
GND
ADIN
4151 BD
operaTion
The LTC4151 accurately monitors high side current and
voltages. This device accepts a wide range of input volt-
ages from as low as 7V up to 80V and consumes less
than 1.7mA quiescent current in normal operation. A
shutdown mode is available with the LTC4151 to reduce
the quiescent current to less than 300µA by pulling the
SHDN pin below 1V.
In snapshot mode, the LTC4151 can perform on-demand
measurement of a selected voltage without the need of
continuous polling by a master controller. The snapshot
mode is enabled by programming the control register
2
through the I C interface. A status bit in the data register
monitors the ADC’s conversion. When the conversion is
completed, the12-bitdigitalcodeofthemeasuredvoltage
is held in the corresponding data registers.
In default continuous scan mode after power-up, the
onboard12-bitanalog-to-digitalconverter(ADC)continu-
ously and sequentially measures the high side differential
2
The LTC4151 provides an I C interface to read the ADC
data from the data registers and to program the control
register. Two three-state pins, ADR0 and ADR1, are
used to decode nine device addresses (see Table 1). The
LTC4151 features a single SDA pin to handle both input
data and output data, while the LTC4151-1/LTC4151-2
provide separate data in (SDAI) and data out (SDAO on
the LTC4151-1 and SDAO on the LTC4151-2) pins to
+
–
voltagebetweenSENSE (KelvinsenseofV )andSENSE
IN
(full-scale 81.92mV) through an internal sense amplifier,
theinputvoltageV (full-scale102.4V)throughaninternal
IN
voltage divider, and the voltage applied to the ADIN pin
(full-scale 2.048V). The reference voltage of the ADC is
internally set to 2.048V. The digital data obtained by the
ADC is stored in the onboard registers.
facilitate opto-isolation.
4151ff
For more information www.linear.com/LTC4151
7
LTC4151
applicaTions inForMaTion
The LTC4151 offers a compact complete solution for high
side power monitoring. With a wide operating voltage
range from 7V to 80V, this device is ideal for a variety of
applications including consumer, automotive, industrial
andtelecominfrastructure.Thesimpleapplicationcircuitas
showninFigure1providesmonitoringofhighsidecurrent
with a 0.02W resistor (4.096A in full scale), input voltage
(102.4V in full scale) and an external voltage (2.048V in
full scale), all with an internal 12-bit resolution ADC.
code of each measured voltage is stored in two adjacent
registers out of the six total data registers A through F,
with the eight MSBs in the first register and the four LSBs
in the second (Table 2).
ThedatainregistersAthroughFisrefreshedatafrequency
of7.5Hzincontinuousscanmode. Settingcontrolregister
bit G4 (Table 6) invokes a test mode that halts updating
of these registers so that they can be written to and read
from for software testing.
The data converter features a snapshot mode allowing us-
ers to make one-time measurements of a selected voltage
Data Converter
The LTC4151 features an onboard, 12-bit ∆Σ A/D
converter (ADC) that continuously monitors three volt-
ages in the sequence of (V
(either the SENSE voltage, V voltage, or ADIN voltage).
IN
To enable snapshot mode, set control register bit G7 and
write the 2-bit code of the desired ADC channel to G6
and G5 (Table 6) using a Write Byte command. When the
Write Byte command is completed, the ADC measures the
selected voltage and a Busy Bit in the LSB data register is
set to indicate that the data is not ready. After complet-
ing the conversion, the ADC is halted and the Busy Bit is
reset to indicate that the data is ready. To make another
measurement of the same voltage or to measure another
voltage, first disable the snapshot mode for the previous
measurementbyclearingcontrolbitG7,thenre-enablethe
snapshot mode and write the code of the desired voltage
according to the procedure described above. The Busy Bit
remains reset in the continuous scan mode.
–
– V
) first, V
+
SENSE
SENSE IN
second and V
third. The ∆Σ architecture inherently
ADIN
averages signal noise during the measurement period.
The differential voltage between SENSE and SENSE is
monitored with an 81.92mV full scale and 20µV resolu-
tion that allows accurate measurement of the high side
input current. SENSE is a Kelvin sense pin for the V
pin and must be connected to V (see Figure 10) for
proper ADC readout. The supply voltage at V is directly
measured with a 102.4V full scale and 25mV resolution.
The voltage at the uncommitted ADIN pin is measured
with a 2.048V full scale and 0.5mV resolution that allows
monitoring of any external voltage. The 12-bit digital
+
–
+
IN
IN
IN
0.02Ω
3.3V
V
IN
V
OUT
7V TO 80V
+
–
SENSE SENSE
V
DD
2k
2k
LTC4151
V
IN
µ-CONTROLLER
SCL
SDA
SHDN
SCL
SDA
ADR1
ADR0
GND
4151 F01
ADIN
V
ADIN
GND
Figure 1. Monitoring High Side Current and Voltages Using the LTC4151
4151ff
For more information www.linear.com/LTC4151
8
LTC4151
applicaTions inForMaTion
I C Interface
2
Page commands, the host need only to issue an initial
register address and the internal register address pointer
automaticallyincrementsby1aftereachbyteofdataisread
or written. After the register address reaches 06h, it will
be reset to 00h and continue the increment. Upon a Stop
condition, the register address is reset to 00h. If desired,
the Read Page and Write Page support can be disabled by
clearing control register bit G3. The data formats for the
above commands are shown in Figures 3 to 8.
2
The LTC4151 features an I C-compatible interface to
provide access to six ADC data registers and a control
register for monitoring the measured voltages. Figure 2
2
shows a general data transfer format using the I C. The
LTC4151is a read-write slave device and supports SMBus
Read Byte, Write Byte, Read Word and Write Word com-
mands. The device also supports Read Page and Write
Page commands that allow one to read or write more than
two bytes of data. When using the Read Page and Write
SDA
SCL
a6 - a0
1 - 7
b7 - b0
b7 - b0
8
9
1 - 7
8
9
1 - 7
8
9
S
P
START
CONDITION
ADDRESS
R/W
ACK
DATA
ACK
DATA
ACK
STOP
CONDITION
4151 F02
Figure 2. General Data Transfer over I2C
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
DATA
b7:b0
A
P
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
DATA
b7:b0
A
DATA
A
P
0
0
X X X X X b2:b0
0
0
b7:b0
0
0
0
X X X X X b2:b0
0
0
4151 F03
4151 F04
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
A: ACKNOWLEDGE (LOW)
A: NOT ACKNOWLEDGE (HIGH) S: START CONDITION
R: READ BIT (HIGH) P: STOP CONDITION
W: WRITE BIT (LOW)
Figure 4. LTC4151 Serial Bus SDA Write Word Protocol
Figure 3. LTC4151 Serial Bus SDA Write Byte Protocol
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
DATA
A
DATA
A
...
DATA
A
P
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
S
ADDRESS
R
A
DATA
A
P
0
0
X X X X X b2:b0
0
b7:b0
0
b7:b0
0
...
b7:b0
0
0
0
X X X X X b2:b0
0
1 1 0 a3:a0
1
0
b7:b0
1
4151 F05
4151 F06
Figure 5. LTC4151 Serial Bus SDA Write Page Protocol
Figure 6. LTC4151 Serial Bus SDA Read Byte Protocol
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
S
ADDRESS
R
A
DATA
A
DATA
A
P
0
0
X X X X X b2:b0
0
1 1 0 a3:a0
1
0
b7:b0
0
b7:b0
1
4151 F07
Figure 7. LTC4151 Serial Bus SDA Read Word Protocol
S
ADDRESS W A
1 1 0 a3:a0
COMMAND
A
S
ADDRESS
R
A
DATA
A
DATA
...
DATA
A
P
0
0
X X X X X b2:b0
0
1 1 0 a3:a0
1
0
b7:b0
0
b7:b0
...
b7:b0
1
4151 F08
Figure 8. LTC4151 Serial Bus SDA Read Page Protocol
4151ff
For more information www.linear.com/LTC4151
9
LTC4151
applicaTions inForMaTion
Using Opto-Isolators with LTC4151-1 and LTC4151-2
Start and Stop Conditions
2
The LTC4151-1/LTC4151-2 split the SDA line into SDAI
(input) and SDAO (LTC4151-1 inverted output) or SDAO
(LTC4151-2 output) for convenience of opto-coupling
with a host controller that sits at a different ground level.
When the I C bus is idle, both SCL and SDA must remain
in the high state. A bus master signals the beginning of a
transmission with a Start condition by transitioning SDA
from high to low while SCL stays high. When the master
hasfinishedcommunicatingwiththeslave,itissuesaStop
condition by transitioning SDA from low to high while SCL
stays high. The bus is then free for another transmission.
When using opto-isolators with the LTC4151-1, connect
the SDAI to the output of the incoming opto-coupler and
connect the SDAO to the anode of the outgoing opto-
coupler (see Figure 9). With the outgoing opto-coupler
clamping SDAO and internal 6V (5.5V minimum) clamps
on SDAI and SCL, the pull-up resistors on these three pins
Stuck-Bus Reset
2
The LTC4151 I C interface features a stuck-bus reset
timer. The low conditions of the SCL and the SDA/SDAI
pins are OR’ed to start the timer. The timer is reset when
both SCL and SDA/SDAI are pulled high. If the SCL pin or
the SDA/SDAI pin is held low for over 33ms, the stuck-bus
can be directly connected to V . In this way (with SDAO
rather than conventional SDAO), the need for a separate
low voltage supply for pull-ups is eliminated.
IN
Figure 11 shows the LTC4151-2 with high speed opto-
couplers for faster bus speeds. The LTC4151-2 has a non-
2
timer will expire and the internal I C state machine will be
reset to allow normal communication after the stuck-bus
condition is cleared. The stuck-bus timer can be disabled
by clearing control register bit G2.
inverter SDAO output. Powered from V , the high voltage
IN
LT3010-5lowdropoutregulatorprovidesthesupplyforthe
opto-couplers as well as the bus lines pull-up. If the SDAI
and SDAO on the master controller are not tied together,
the ACK bit of the SDAO must be returned back to SDAI.
R
S
3.3V
0.02Ω
V
IN
48V
R1
20k
R2
20k
R3
5.1k
R5
R6 R7
10k 10k
R4
0.51k 0.51k
MOCD207M
+
–
SENSE
SENSE
8
1
SCL
V
IN
7
6
2
3
V
DD
SCL
LTC4151-1
SDAI
SDA0
ADIN
µ-CONTROLLER
ADR1
ADR0
5
1
4
8
V
MOCD207M
ADIN
SDA
GND
GND
4151 F09
2
3
7
6
4
5
Figure 9. Opto-Isolation of the I2C Interface Between LTC4151-1 and a
Microcontroller (1.5kHz Data Rate of I2C is Limited by Slew Rate of Opto-Isolators)
4151ff
For more information www.linear.com/LTC4151
10
LTC4151
applicaTions inForMaTion
I C Device Addressing
2
set to zero. After the addressed LTC4151 acknowledges
the address byte, the master then sends a command
byte which indicates which internal register the master
wishes to write. The LTC4151 acknowledges this and
then latches the lower three bits of the command byte
into its internal register address pointer. The master then
delivers the data byte and the LTC4151 acknowledges
once more and latches the data into its internal register.
If the master continues sending a second byte or more
data bytes, as in a Write Word or Write Page command,
the second byte or more data bytes will be acknowledged
by the LTC4151, the internal register address pointer
will increment automatically, and each byte of data will
be latched into an internal register corresponding to the
address pointer. The write operation terminates and the
register address pointer resets to 00h when the master
sends a Stop condition.
2
Nine distinct I C bus addresses are configurable using the
three-state pins ADR0 and ADR1, as shown in Table 1.
Address bits a6, a5 and a4 are configured to (110) and
the least significant bit is the R/W bit. In addition, the
LTC4151 will respond to a mass write address (1100 110)
b for writing to all LTC4151s, regardless of their individual
address settings.
Acknowledge
The acknowledge signal is used for handshaking between
the transmitter and the receiver to indicate that the last
byte of data was received. The transmitter always releases
the SDA line during the acknowledge clock pulse. The
LTC4151 pulls the SDA line low on the 9th clock cycle to
acknowledge receipt of the data. If the slave fails to ac-
knowledge by leaving SDA high, then the master can abort
the transmission by generating a Stop condition. When
the master is receiving data from the slave, the master
must pull down the SDA line during the clock pulse to
indicate receipt of a data byte, and that another byte is to
be read. After the last byte has been received the master
will leave the SDA line high (not acknowledge) and issue
a Stop condition to terminate the transmission.
Read Protocol
The master begins a read operation with a Start condition
followed by the seven bit slave address and the R/W bit
set to zero. After the addressed LTC4151 acknowledges
the address byte, the master then sends a command
byte that indicates which internal register the master
wishes to read. The LTC4151 acknowledges this and then
latches the lower three bits of the command byte into its
internal register address pointer. The master then sends
a repeated Start condition followed by the same seven bit
Write Protocol
The master begins a write operation with a Start condition
followed by the seven bit slave address and the R/W bit
Table 1. LTC4151 Device Addressing*
HEX DEVICE
LTC4151
ADDRESS PINS
DESCRIPTION
ADDRESS
BINARY DEVICE ADDRESS
h
a6
1
1
1
1
1
1
1
1
1
1
a5
1
1
1
1
1
1
1
1
1
1
a4
0
0
0
0
0
0
0
0
0
0
a3
0
0
1
1
1
1
1
1
1
1
a2
1
1
0
0
0
0
1
1
1
1
a1
1
1
0
0
1
1
0
0
1
1
a0
0
1
0
1
0
1
0
1
0
1
R/W
0
ADR1
X
ADR0
X
Mass Write
CC
0
1
2
3
4
5
6
7
8
CE
X
H
L
D0
X
NC
H
H
D2
X
H
D4
X
NC
NC
L
NC
L
D6
X
D8
X
H
DA
X
H
NC
NC
L
DC
X
L
DE
X
L
*H = Tie High; L = Tie to GND; NC = Open; X = Don’t Care
4151ff
For more information www.linear.com/LTC4151
11
LTC4151
applicaTions inForMaTion
Table 2. LTC4151 Register Address and Contents
REGISTER ADDRESS* REGISTER NAME
READ/WRITE
R/W**
R/W**
R/W**
R/W**
R/W**
R/W**
R/W
DESCRIPTION
00h
01h
02h
03h
04h
05h
06h
07h
SENSE (A)
SENSE (B)
ADC Current Sense Voltage Data (8 MSBs)
ADC Current Sense Voltage Data (4 LSBs)
V
IN
V
IN
(C)
(D)
ADC V Voltage Data (8 MSBs)
IN
ADC V Voltage Data (4 LSBs)
IN
ADIN (E)
ADC ADIN Voltage Data (8 MSBs)
ADIN (F)
ADC ADIN Voltage Data (4 LSBs)
CONTROL (G)
Reserved
Controls ADC Operation Mode and Test Mode
*Register address MSBs b7-b3 are ignored. **Writable if bit G4 is set.
Table 3. SENSE Registers A (00h) and B (O1h)—Read/Write
BIT
NAME
OPERATION
A7:0, B7:4 SENSE Voltage Data
12-Bit Data of Current Sense Voltage with 20µV LSB and 81.92mV Full-Scale
1 = SENSE Being Converted; 0 = SENSE Conversion Completed. Not Writable
Always Returns 0. Not Writable
B3
ADC Busy in Snapshot Mode
Reserved
B2:0
Table 4. VIN Registers C (02h) and D (O3h)—Read/Write
BIT
NAME
V Voltage Data
IN
OPERATION
12-Bit Data of V Voltage with 25mV LSB and 102.4V Full-Scale
C7:0, D7:4
D3
IN
ADC Busy in Snapshot Mode
Reserved
1 = V Being Converted; 0 = V Conversion Completed. Not Writable
IN IN
D2:0
Always Returns 0, Not Writable
Table 5. ADIN Registers E (04h) and F (O5h)—Read/Write
BIT
NAME
OPERATION
E7:0, F7:4
F3
ADIN Voltage Data
ADC Busy in Snapshot Mode
Reserved
12-Bit Data of Current Sense Voltage with 500µV LSB and 2.048V Full-Scale
1 = ADIN Being Converted; 0 = ADIN Conversion Completed. Not Writable
Always Returns 0, Not Writable
F2:0
Table 6. CONTROL Register G (06h)—Read/Write
BIT
NAME
OPERATION
G7
ADC Snapshot Mode
Enable
Enables ADC Snapshot Mode; 1 = Snapshot Mode Enabled. Only the channel selected by G6 and G5 is
measured by the ADC. After the conversion, the channel busy bit is reset and the ADC is halted.
0 = Snapshot Mode Disabled (ADC free running, Default).
G6
G5
ADC Channel Label for
Snapshot Mode
ADC Channel Label for Snapshot Mode
G6
0
G5
0
1
ADC CHANNEL
ADC Channel Label for
Snapshot Mode
SENSE (Default)
0
1
V
IN
ADIN
0
G4
Test Mode Enable
Test Mode Halts ADC Operation and Enables Writes to ADC Registers; 1 = Enable Test Mode,
0 = Disable Test Mode (Default)
2
2
G3
Page Read/Write Enable
Stuck-Bus Timer Enable
Reserved
Enables Page Read/Write; 1 = Enable I C Page Read/Write (Default), 0 = Disable I C Page Read/Write
2
G2
Enables I C Stuck-Bus Reset Timer; 1 = Enable Stuck-Bus Timer (Default), 0 = Disable Stuck-Bus Timer
G1:0
Always Returns 0, Not Writable
4151ff
For more information www.linear.com/LTC4151
12
LTC4151
applicaTions inForMaTion
stays at a reasonable temperature. Using 0.03" per amp
or wider is recommended. Note that 1oz copper exhibits
a sheet resistance of about 530µW per square.
address with the R/W bit now set to one. The LTC4151
acknowledges and sends the contents of the requested
register. The transmission terminates when the master
sends a Stop condition. If the master acknowledges the
transmitted data byte, as in a Read Word command, the
LTC4151 will send the contents of the next register. If
the master acknowledges the second data byte and each
of the following (if more) data bytes, as in a Read Page
command, the LTC4151 will keep sending out each data
byte in the register that corresponds to the incrementing
register pointer. The read operation terminates and the
register address pointer resets to 00h when the master
sends a Stop condition.
V
R
S
I
LOAD
IN
+
–
SENSE
SENSE
V
IN
GND
LTC4151
ADR1
ADR0
Layout Considerations
A Kelvin connection between the sense resistor R and
S
I
GND
LOAD
the LTC4151 is recommended to achieve accurate cur-
rent sensing (Figure 10). The minimum trace width for
1oz copper foil is 0.02" per amp to make sure the trace
4151 F10
Figure 10. Recommended Layout for Kelvin Connection
R1
0.02Ω
V
IN
V
OUT
7V TO 80V
V
IN
ISO1
8
5
1
2
IN
OUT
PS9817-2
5V
C6
R8
1k
C7
1µF
100V
LT3010-5
SHDNSENSE
8
1µF
V
CC
1
2
C4
7
5
GND
4
R12
1k
R14
10k
0.1µF
R3
10k
R4
10k
+
–
SENSE SENSE
GND
R11
1k
R13
10k
V
IN
LTC4151-2
1
8
7
ADIN
ADR1
SDAO
SDAI
V
CC
ISO_SDA
ISO_SCL
2
3
6
5
ADR0
SCL
GND
GND
4
4151 F11
ISO2
PS9817-2
Figure 11. LTC4151-2 I2C Opto-Isolation Interface with High Speed Opto-Couplers
4151ff
For more information www.linear.com/LTC4151
13
LTC4151
Typical applicaTion
Temperature Monitoring with an NTC Thermistor While
Measuring Load Current and LTC4151 Supply Current
0.2Ω
V
IN
48V
250mA
LOAD
VISHAY
2381 615 4.104
100k AT 25°C
1%
+
–
SENSE SENSE
V
IN
SCL
2
40.2k
1%
I C
SDA
LTC4151
GND
ADIN
ADR1
1.5k
1%
ADR0
4151 TA02
T(°C) = 58.82 • (N /N – 0.1066), 20°C < T < 60°C.
ADIN VIN
N
AND N ARE DIGITAL CODES MEASURED BY THE
VIN
ADIN
ADC AT THE ADIN AND V PINS, RESPECTIVELY.
IN
LTC4151-1 Monitors Current and Input Voltage of a –48V System and Interfaces with
a Microcontroller (1.5kHz Data Rate of I2C is Limited by Slew Rate of Opto-Isolators)
R
S
3.3V
0.02Ω
RTN
R1
20k
R2
20k
R3
5.1k
R5
R6 R7
10k 10k
R4
0.51k 0.51k
MOCD207M
+
–
SENSE
SENSE
8
1
SCL
V
IN
7
6
2
3
V
DD
SCL
LTC4151-1
SDAI
SDA0
ADIN
µ-CONTROLLER
ADR1
ADR0
5
1
4
8
V
MOCD207M
ADIN
SDA
GND
GND
4151 TA04
2
3
7
6
–48V
4
5
4151ff
For more information www.linear.com/LTC4151
14
LTC4151
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DD Package
10-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1699 Rev C)
R = 0.125
TYP
6
0.40 ± 0.10
10
0.70 ±0.05
3.55 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ±0.05
1.65 ± 0.10
(2 SIDES)
3.00 ±0.10
(4 SIDES)
PIN 1 NOTCH
R = 0.20 OR
0.35 × 45°
PIN 1
TOP MARK
(SEE NOTE 6)
PACKAGE
OUTLINE
CHAMFER
(DD) DFN REV C 0310
5
1
0.25 ± 0.05
0.50 BSC
0.75 ±0.05
0.200 REF
0.25 ± 0.05
0.50
BSC
2.38 ±0.10
(2 SIDES)
2.38 ±0.05
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2).
CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT
2. DRAWING NOT TO SCALE
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
3. ALL DIMENSIONS ARE IN MILLIMETERS
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1ꢀꢀ1 Rev F)
0.889 0.127
(.035 .005)
5.10
(.201)
MIN
3.20 – 3.45
(.12ꢀ – .13ꢀ)
3.00 0.102
(.118 .004)
(NOTE 3)
(.0197)
0.497 0.07ꢀ
(.019ꢀ .003)
REF
0.50
0.305 0.038
(.0120 .0015)
TYP
10 9
8
7 ꢀ
BSC
RECOMMENDED SOLDER PAD LAYOUT
3.00 0.102
(.118 .004)
(NOTE 4)
4.90 0.152
(.193 .00ꢀ)
DETAIL “A”
0.254
(.010)
0° – ꢀ° TYP
GAUGE PLANE
1
2
3
4 5
0.53 0.152
(.021 .00ꢀ)
0.8ꢀ
(.034)
REF
1.10
(.043)
MAX
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.17 – 0.27
(.007 – .011)
TYP
0.101ꢀ 0.0508
(.004 .002)
0.50
(.0197)
BSC
MSOP (MS) 0213 REV F
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.00ꢀ") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.00ꢀ") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
4151ff
For more information www.linear.com/LTC4151
15
LTC4151
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
S Package
16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610 Rev G)
.386 – .394
(9.804 – 10.008)
.045 .005
NOTE 3
.050 BSC
16
N
15
14
13
12
11
10
9
N
1
.245
MIN
.160 .005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
2
3
N/2
N/2
8
.030 .005
TYP
RECOMMENDED SOLDER PAD LAYOUT
2
3
5
6
7
1
4
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0° – 8° TYP
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
.016 – .050
(0.406 – 1.270)
S16 REV G 0212
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE
4151ff
For more information www.linear.com/LTC4151
16
LTC4151
revision hisTory (Revision history begins at Rev C)
REV
DATE
11/10 Added H-grade information
Revised order of Pin Functions section and added information to SDAI pin description
DESCRIPTION
PAGE NUMBER
C
2, 3
6
Added diode and 2k resistor to Block Diagram
7
Added information to Application Information section
Changed part number in Pin Configuration section from LT4151 to LTC4151
10
2
D
E
F
7/12
11/12 Added –48V application schematic
3/14 Increased V MAX limit and decreased V
14
4
MIN limit
ADR(L)
ADR(H)
4151ff
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
reil
tion that the interconnection of its circuits as described he inw l not infringe on existing patent rights.
17
LTC4151
Typical applicaTion
High Side Current, Input Voltage and Open Fuse Monitoring
with a Single LTC4151
F1
F2
D1
D2
V
IN1
RS
0.02Ω
48V
V
IN2
48V
+
–
D3
D4
SENSE SENSE
V
IN
SCL
SDA
+
V
2
R1
150k
R2
301k
I C
LTC4151
LOAD
ADR1
ADR0
ADIN
–
V
R3
3.4k
GND
GND
4151 TA03
CONDITION
≥ 1.375 • N
RESULT
N
Normal Operation
F2 is Open
ADIN
VIN
0.835 • N ≤ N
< 1.375 • N
< 0.835 • N
VIN
ADIN
ADIN
VIN
0.285 • N ≤ N
F1 is Open
VIN
VIN
(Not Responding)
Both F1 and F2 are Open
AND V ARE WITHIN 20% APART. N AND N ARE DIGITAL CODES
IN2 ADIN
V
IN1
VIN
MEASURED BY THE ADC AT THE ADIN AND V PINS, RESPECTIVELY.
IN
relaTeD parTs
PART NUMBER
LT2940
DESCRIPTION
COMMENTS
Power and Current Monitor
Four-Quadrant Multiplication, 5% Power Accuracy, 4V to 80V Operation
2
LTC2945
Wide Range I C Power Monitor
0V to 80V Input Range, 2.7V to 80V Supply Range, Shunt Regulator, 12-Bit ADC
with 0.75% TUE
2
LTC2451
LTC2453
16-Bit I C Ultra Tiny Delta Sigma ADC
Single-Ended Input, 0 to V Input Range, 60Hz Output Rate, 3mm × 2mm
CC
DFN-8 Package
2
16-Bit I C Ultra Tiny Delta Sigma ADC
Differential Input,
DFN-8 Package
V
CC
Input Range, 60Hz Output Rate, 3mm × 2mm
LTC2970
LTC4215
LTC4260
Power Supply Monitor and Margining Controller 14-Bit ADC Monitoring Current and Voltages, Supplies from 8V to 15V
Positive Hot SwapTM Controller with ADC and I C 8-Bit ADC Monitoring Current and Voltages, Supplies from 2.9V to 15V
2
Positive High Voltage Hot Swap Controller with
8-Bit ADC Monitoring Current and Voltages, Supplies from 8.5V to 80V
2
ADC and I C
LTC4261/
LTC4261-2
Negative High Voltage Hot Swap Controller with
10-Bit ADC Monitoring Current and Voltages, Supplies from –12V
2
ADC and I C
LTC6101/
LTC6101HV
High Voltage, High Side Current Sense Amplifier Supplies from 4V to 60V (LTC6101) and 5V to 100V (LTC6101HV)
in SOT-23 Package
4151ff
LT 0314 REV F • PRINTED IN USA
18 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
LINEAR TECHNOLOGY CORPORATION 2008
(408)432-1900 FAX: (408) 434-0507 www.linear.com/LTC4151
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