MAX9943_V01 [MAXIM]
High-Voltage, Precision, Low-Power Op Amps;
| 型号： | MAX9943_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | High-Voltage, Precision, Low-Power Op Amps |
| 文件： | 总11页 (文件大小：1599K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
General Description
The MAX9943/MAX9944 is a family of high-voltage
amplifiers that offers precision, low drift, and low-power
consumption.
Features
● Wide 6V to 38V Supply Range
● Low 100μV (max) Input Offset Voltage
● Low 0.4μV/°C Offset Drift
The MAX9943 (single) and MAX9944 (dual) op amps
offer 2.4MHz of gain-bandwidth product with only 550μA
of supply current per amplifier.
● Unity Gain Stable with 1nF Load Capacitance
● 2.4MHz Gain-Bandwidth Product
● 550μA Supply Current
The MAX9943/MAX9944 family has a wide power supply
range operating from ±3V to ±19V dual supplies or a 6V
to 38V single supply.
● 20mA Output Current
● Rail-to-Rail Output
The MAX9943/MAX9944 is ideal for sensor signal condi-
tioning, high-performance industrial instrumentation and
loop-powered systems (e.g., 4mA–20mA transmitters).
● Package Options
• 3mm x 5mm, 8-Pin μMAX or 3mm x 3mm, 6-Pin
TDFN Packages (Single)
• 5mm x 6mm, 8-Pin SO or 3mm x 3mm, 8-Pin
TDFN Packages (Dual)
The MAX9943 is offered in a space-saving 6-pin TDFN
®
or 8-pin μMAX package. The MAX9944 is offered in an
8-pin SO or an 8-pin TDFN package. These devices are
specified over the -40°C to +125°C automotive tempera-
ture range.
Pin Configurations appear at end of data sheet.
Applications
● Sensor Interfaces
● Loop-Powered Systems
● Industrial Instrumentation
● High-Voltage ATE
● High-Performance ADC/DAC Input/Output Amplifiers
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Capacitive Load vs. Resistive Load
100,000
UNSTABLE
10,000
1000
STABLE
100
100
1000
10,000
(Ω)
100,000
R
LOAD
19-4433; Rev 4; 10/17
MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Absolute Maximum Ratings
Supply Voltage (V
to V )................................-0.3V to +40V
Continuous Input Current (Any Pins) ...............................±20mA
Thermal Limits (Note 2)
CC
EE
All Other Pins (Note 1)..................(V - 0.3V) to (V
+ 0.3V)
EE
CC
OUT Short-Circuit Current Duration
Multiple Layer PCB
8-Pin μMAX (V
8-Pin μMAX (V
6-Pin TDFN (V
6-Pin TDFN (V
- V ≤ 20V) .......................................... 3s
Continuous Power Dissipation (T = +70°C)
CC
CC
CC
CC
EE
A
- V > 20V)............................Momentary
8-Pin μMAX (derate 4.8mW/°C above +70°C).........387.8mW
6-Pin TDFN-EP (derate 23.8mW/°C above +70°C)... 1904.8mW
8-Pin SO (derate 7.6mW/°C above +70°C).................606.1W
8-Pin TDFN-EP (derate 24.4mW/°C above +70°C)... 1951.2mW
Operating Temperature Range......................... -40°C to +125°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow).......................................+260°C
EE
- V ≤ 20V)........................................ .60s
EE
- V > 20V) .......................................... 2s
EE
8-Pin SO (V
8-Pin SO (V
- V ≤ 20V)............................................. 60s
CC
CC
EE
- V > 20V)............................................... 2s
EE
8-Pin TDFN (V
8-Pin TDFN (V
- V ≤ 20V)......................................... 60s
CC
CC
EE
- V > 20V) .......................................... 2s
EE
Note 1: Operation is limited by thermal limits.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
(Note 2)
Package Thermal Characteristics
8 μMAX
8 SO
Junction-to-Ambient Thermal Resistance (θ ) ........132°C/W
Junction-to-Ambient Thermal Resistance (θ ) .....206.3°C/W
JA
JA
Junction-to-Ambient Case Resistance (θ )...............42°C/W
Junction-to-Ambient Case Resistance (θ )...............38°C/W
JC
JC
6 TDFN-EP
8 TDFN-EP
Junction-to-Ambient Thermal Resistance (θ ) ..........42°C/W
Junction-to-Ambient Thermal Resistance (θ ) ..........41°C/W
JA
JA
Junction-to-Ambient Case Resistance (θ ).................9°C/W
Junction-to-Ambient Case Resistance (θ ).................8°C/W
JC
JC
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
= 15V, V = -15V, V
= 0V, R = 10kΩ to GND, V
= 0V, T = -40°C to +125°C. Typical values are at T = +25°C, unless
CC
EE
CM
L
GND
A
A
otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Operating Supply Voltage Range
V
Guaranteed by PSRR test
±3
±19
950
V
SUPPLY
Quiescent Supply Current per
Amplifier
I
550
µA
dB
CC
Power-Supply Rejection Ratio
PSRR
V
= ±3V to ±19V
= +25°C
105
130
20
S
A
A
T
T
100
240
Input Offset Voltage
V
µV
µV/°C
nA
OS
= -40°C to +125°C
Input Offset Voltage Drift
Input Bias Current
TCV
0.4
4
OS
V
V
V
+ 0.3V ≤ V
≤ V - 1.8V
CC
20
90
10
EE
EE
EE
CM
CC
CC
I
BIAS
≤ V
≤ V
≤ V
- 1.8V
- 1.8V
CM
CM
Input Offset Current
Input Voltage Range
I
≤ V
1
nA
V
OS
Guaranteed by CMRR test,
= -40°C to +125°C
V
CC
1.8
-
V
, V
V
EE
IN+
IN-
T
A
V
+ 0.3V ≤ V
≤ V - 1.8V
CC
105
105
125
EE
EE
CM
Common-Mode Rejection Ratio
CMRR
dB
V
≤ V
≤ V
- 1.8V
CM
CC
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Electrical Characteristics (continued)
(V
= 15V, V = -15V, V
= 0V, R = 10kΩ to GND, V
= 0V, T = -40°C to +125°C. Typical values are at T = +25°C, unless
CC
EE
CM
L
GND
A
A
otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
-13.5V ≤ V ≤ +13.5V, R = 10kΩ,
O
L
115
130
T
= +25°C
A
-13.5V ≤ V ≤ +13.5V, R = 10kΩ,
O
L
100
100
90
T
= -40°C to +125°C
A
Open-Loop Gain
A
dB
VOL
-12V ≤ V ≤ +12V, R = 600Ω,
O
L
110
T
= +25°C
A
-12V ≤ V ≤ +12V, R = 600Ω,
O
L
T
= -40°C to +85°C
A
V
-
-
CC
0.2
R = 10kΩ
L
V
V
CC
1.8
OH
T
T
= +25°C
A
A
R = 600Ω
L
= -40°C to +85°C
V
- 2
CC
Output Voltage Swing
V
V
0.1
+
EE
R = 10kΩ
L
V
T
T
= +25°C
V
+ 1
OL
A
A
EE
R = 600Ω
V
+
L
EE
= -40°C to +85°C
1.1
T
T
= +25°C
60
A
Short-Circuit Current
I
mA
SC
= -40°C to +125°C
100
A
AC CHARACTERISTICS
Gain Bandwidth Product
Slew Rate
GBWP
SR
2.4
0.35
17.6
500
MHz
V/µs
-5V ≤ V
≤ +5V
OUT
Input Voltage Noise Density
Input Voltage Noise
e
n
f = 1kHz
nV/√Hz
TOTAL NOISE 0.1Hz ≤ f ≤ 10Hz
nV
P-P
Input Current Noise Density
Capacitive Loading
I
f = 1kHz
0.18
1000
pA/√Hz
n
C
No sustained oscillation
pF
LOAD
Note 3: All devices are 100% production tested at T = +25°C. Temperature limits are guaranteed by design.
A
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Typical Operating Characteristics
(V
= 15V, V = -15V, V
= 0V, R = 10kΩ to GND, V
= 0V, T = +25°C, unless otherwise noted.)
CC
EE
CM
L
GND A
INPUT VOLTAGE OFFSET
DRIFT HISTOGRAM
OFFSET VOLTAGE HISTOGRAM
SUPPLY CURRENT vs. SUPPLY VOLTAGE
700
650
600
550
500
450
400
350
300
70
60
50
40
30
20
10
0
25
20
15
10
5
0
-0.3 -0.2 -0.1
0
0.1
-0.05 0.05 0.15 0.25
DRIFT (µV/°C)
0.2
0.3
6
10 14 18 22 26 30 34 38
SUPPLY VOLTAGE (V)
-60 -50 -40 -30 -20 -10
10 20 30 40 50 60
0
-0.25 -0.15
OFFSET VOLTAGE (µV)
V
OS
SUPPLY CURRENT vs. TEMPERATURE
OFFSET VOLTAGE vs. SUPPLY VOLTAGE
800
700
600
500
400
300
30
25
20
15
10
5
0
-50 -25
0
25
50
75 100 125
6
10 14 18 22 26 30 34 38
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
OFFSET VOLTAGE vs. TEMPERATURE
100
80
60
40
20
0
30
25
20
15
10
5
-20
-40
0
-50 -25
0
25
50
75 100 125
-14 -10
-6
-2
2
6
10
14
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Typical Operating Characteristics (continued)
(V
= 15V, V = -15V, V
= 0V, R = 10kΩ to GND, V
= 0V, T = +25°C, unless otherwise noted.)
CC
EE
CM
L
GND A
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
3.0
2.5
2.0
1.5
1.0
0.5
0
3.0
2.5
2.0
1.5
1.0
0.5
0
-14 -10
-6
-2
2
6
10
14
6
10 14 18 22 26 30 34 38
SUPPLY VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
COMMON-MODE REJECTION
RATIO vs. FREQUENCY
140
130
120
110
100
90
160
140
120
100
80
60
80
40
70
20
60
0
0.001 0.01 0.1
1
10 100 1000 10,000
0.001 0.01 0.1
1
10 100 1000 10,000
FREQUENCY (kHz)
FREQUENCY (kHz)
V
OL
vs. OUTPUT CURRENT
V
OH
vs. OUTPUT CURRENT
-12
-13
-14
16
15
14
13
T
= -40°C
A
T
A
= +125C
T
= +25°C
A
T
= +85C
A
T
= +85°C
T
A
T
A
= -40C
= +125°C
-15
-16
A
T
= +25C
A
12
0
5
10
15
20
25
30
0
5
10
15
20
25
30
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Typical Operating Characteristics (continued)
(V
= 15V, V = -15V, V
= 0V, R = 10kΩ to GND, V
= 0V, T = +25°C, unless otherwise noted.)
CC
EE
CM
L
GND A
INPUT VOLTAGE NOISE
vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
1000
100
10
100
90
80
70
60
50
40
30
20
10
0
1
0.1
0.01
0.1
1
10
100
1000 10,000
1
10
100
1000 10,000 100,000
FREQUENCY (kHz)
FREQUENCY (Hz)
CAPACITIVE LOAD vs. RESISTIVE LOAD
OPEN-LOOP GAIN vs. FREQUENCY
SMALL SIGNAL-STEP RESPONSE
MAX9943 toc18
100,000
10,000
1000
140
120
100
80
UNSTABLE
20mV/div
60
40
STABLE
20
OUT
0
100
-20
10
0.00001 0.001
0.1
1000
10,000
100
100
1000
10,000
(Ω)
100,000
1µs/div
1
0.0001
0.01
FREQUENCY (kHz)
R
LOAD
LARGE SIGNAL-STEP RESPONSE
MAX9943 toc19
1V/div
OUT
10µs/div
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Pin Configurations
TOP VIEW
MAX9943
+
MAX9944
+
N.C.
1
2
3
OUTA
INA-
1
2
3
V
CC
8
7
6
N.C.
8
7
6
IN-
OUTB
INB-
V
CC
IN+
INA+
OUT
N.C.
V
EE
4
V
EE
4
5
5
INB+
8 µMAX
8 SO
TOP VIEW
MAX9944
MAX9943
MAX9943
+
*EP
*EP
1
2
3
OUT
6
5
4
V
CC
1
2
3
OUT
6
5
4
V
CC
OUTA
INA-
1
2
3
V
CC
8
7
6
OUTB
INB-
V
EE
N.C.
IN-
V
EE
N.C.
IN-
INA+
V
EE
4
5
INB+
*EP
IN+
IN+
TOP VIEW
6 TDFN
TOP VIEW
8 TDFN
TOP VIEW
6 TDFN-EP
NOT TO SCALE.
*EP = EXPOSED PAD.
Pin Descriptions
MAX9943
6 TDFN-EP
MAX9943
8 µMAX
MAX9944
8 SO/TDFN-EP
NAME
FUNCTION
1
—
—
2
6
—
—
4
—
1
OUT
OUTA
OUTB
Output
Output A
Output B
7
4
V
Negative Power Supply. Bypass with a 0.1µF capacitor to ground.
EE
3
3
—
3
IN+
INA+
INB+
IN-
Positive Input
—
—
4
—
—
2
Positive Input A
5
Positive Input B
—
2
Negative Input
—
—
5
—
—
1, 5, 8
7
INA-
INB-
N.C.
Negative Input A
6
Negative Input B
—
8
No Connection
6
V
Positive Power Supply. Bypass with a 0.1µF capacitor to ground.
CC
Exposed Pad (TDFN Only). Connect to a large V plane to maximize
thermal performance. Not intended as an electrical connection point.
EE
—
—
—
EP
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Detailed Description
The MAX9943/MAX9944 are single/dual operational
amplifiers designed for industrial applications. They
operate from 6V to 38V supply range while maintaining
excellent performance. These devices utilize a three-
stage architecture optimized for low offset voltage and low
input noise with only 550μA supply current. The devices
are unity gain stable with a 1nF capacitive load. These
well-matched devices guarantee the high open-loop gain,
CMRR, PSRR, and low voltage offset.
R
ISO
OUTPUT
MAX9943
C
L
INPUT
Figure 1. Capacitive Load Driving Circuit
The MAX9943/MAX9944 provide a wide input/output
voltage range. The input terminals of the MAX9943/
MAX9944 are protected from excessive differential
voltage with back-to-back diodes. The input signal current
is also limited by an internal series resistor. With a 40V
differential voltage, the input current is limited to 20mA.
The output can swing to the negative rail while delivering
20mA of current, which is ideal for loop-powered system
applications. The specifications and operation of the
MAX9943/MAX9944 family is guaranteed over the -40°C
to +125°C temperature range.
1.5kΩ
1.5kΩ
Figure 2. Input Protection Circuit
Application Information
to ground. When used with a single supply, bypass V
CC
Bias Current vs. Input Common Mode
with a 0.1μF capacitor to ground. Careful layout technique
helps optimize performance by decreasing the amount of
stray capacitance at the op amp’s inputs and outputs. To
decrease stray capacitance, minimize trace lengths by
placing external components close to the op amp’s pins.
The MAX9943/MAX9944 use an internal bias current
cancellation circuit to achieve very low bias current over
a wide input common-mode range. For such a circuit to
function properly, the input common mode must be at
least 300mV away from the negative supply V . The
EE
input common mode can reach the negative supply V
.
Output Current Capability
EE
However, in the region between V
and V
+ 0.3V,
EE
EE
The MAX9943/MAX9944 are capable of driving heavy
loads such as the ones that can be found in loop-powered
systems for remote sensors. The information is transmitted
through ±20mA or 4mA–20mA current output across
long lines that are terminated with low resistance loads
(e.g., 600Ω). The Typical Application Circuit shows the
MAX9944 used as a voltage-to-current converter with a
current-sense amplifier in the feedback loop. Because
of the high output current capability of the MAX9944, the
device can be used to directly drive the current-loop.
there is an increase in bias current for both inputs.
Capacitive Load Stability
Driving large capacitive loads can cause instability in many
op amps. The MAX9943/MAX9944 are stable with capacitive
loads up to 1nF. The Capacitive Load vs. Resistive Load
graph in the Typical Operating Characteristics gives the
stable operation region for capacitive versus resistive loads.
Stability with higher capacitive loads can be improved
by adding an isolation resistor in series with the op-amp
output, as shown in Figure 1. This resistor improves the
circuit’s phase margin by isolating the load capacitor from
the amplifier’s output.
The specifications and operation of the MAX9943/MAX9944
family is guaranteed over the -40°C to +125°C temperature
range, However, when used in applications with ±15V
supply voltage (see Figure 3), the capability of driving more
than ±20mA of current is limited to the -40°C to +85°C
temperature range. Use a lower supply voltage if this
current must be delivered at a higher temperature range.
Power Supplies and Layout
The MAX9943/MAX9944 can operate with dual supplies
from ±3V to ±19V or with a single supply from +6V to +38V
with respect to ground. When used with dual supplies,
bypass both V
and V with their own 0.1μF capacitor
CC
EE
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Input Common Mode and Output Swing
Input Differential Voltage Protection
The MAX9943/MAX9944 input common-mode range can
swing to the negative rail V . The output voltage can
During normal op-amp operation, the inverting and
noninverting inputs of the MAX9943/MAX9944 are at
essentially the same voltage. However, either due to fast
input voltage transients or due to other fault conditions,
these pins can be forced to be at two different voltages.
EE
swing to both the positive V
and the negative V
CC
EE
rails if the output stage is not heavily loaded. These two
features are very important for applications where the
MAX9943/MAX9944 are used with a single-supply (V
EE
Internal back-to-back diodes and series resistors protect
the inputs from an excessive differential voltage (see
Figure 2). Therefore, IN+ and IN- can be any voltage
within the range shown in the absolute maximum rating.
Note the protection time is still dependent on the package
thermal limits.
connected to ground). One of the applications that can
benefit from these features is when the single-supply op
amp is driving an ADC.
+15V
-15V
V
REF
R
SENSE
DAC
MAX9944
R
LOAD
-15V
Figure 3. Typical ±20mA Current-Source in Loop-Powered Systems
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
8 μMAX
PACKAGE CODE
U8+1
OUTLINE NO.
21-0036
LAND PATTERN NO.
90-0092
6 TDFN-EP
8 SO
T633+2
21-0137
90-0058
S8+4
21-0041
90-0096
8 TDFN-EP
T833+2
21-0137
90-0059
Chip Information
PROCESS: BiCMOS
Ordering Information
PIN-
PACKAGE
TOP
PART
TEMP RANGE
MARK
AACA
AUF
—
MAX9943AUA+
MAX9943ATT+
MAX9944ASA+
MAX9944ATA+
-40°C to +125°C 8 µMAX
-40°C to +125°C 6 TDFN-EP*
-40°C to +125°C 8 SO
-40°C to +125°C 8 TDFN-EP*
BLN
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
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MAX9943/MAX9944
High-Voltage, Precision, Low-Power Op Amps
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
1
2
3
4
3/09
Initial release
—
4/09
Removed future product reference for the MAX9944, updated EC table
Corrected TOC 13 and added rail-to-rail output feature
Updated Pin Description section
1, 2
6/09
1, 3, 5, 8
4/11
7
6
10/17
Added TOC20 to Typical Operating Characteristics section
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2017 Maxim Integrated Products, Inc.
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MAXIM
MAX9945ATT+T
Operational Amplifier, 1 Func, 8000uV Offset-Max, BICMOS, PDSO6, 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229WEEA, TDFN-6
MAXIM
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