LTC2052HS [Linear]
Dual/Quad Zero-Drift Operational Amplifiers; 双核/四零漂移运算放大器
| 型号： | LTC2052HS |
| 厂家： | 
Linear |
| 描述： | Dual/Quad Zero-Drift Operational Amplifiers |
| 文件： | 总12页 (文件大小：144K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC2051/ LTC2052
Dua l/ Qua d Ze ro -Drift
Op e ra tio na l Am p lifie rs
U
FEATURES
DESCRIPTIO
The LTC®2051/LTC2052 are dual/quad zero-drift opera-
tional amplifiers available in the MS8 and SO-8/GN16 and
S14packages.Forspacelimitedapplications,theLTC2051
is available in a 3mm × 3mm × 0.8mm dual fine pitch
leadless package (DFN). They operate from a single 2.7V
supply and support ±5V applications. The current con-
sumption is 750μA per op amp.
■
Maximum Offset Voltage of 3μV
Maximum Offset Voltage Drift of 30nV/°C
Small Footprint, Low Profile MS8/GN16 Packages
Single Supply Operation: 2.7V to ±5.5V
Noise: 1.5μVP-P (0.01Hz to 10Hz Typ)
Voltage Gain: 140dB (Typ)
PSRR: 130dB (Typ)
CMRR: 130dB (Typ)
Supply Current: 0.75mA (Typ) per Amplifier
Extended Common Mode Input Range
Output Swings Rail-to-Rail
Operating Temperature Range –40°C to 125°C
■
■
■
■
■
■
■
The LTC2051/LTC2052, despite their miniature size, fea-
ture uncompromising DC performance. The typical input
offset voltage and offset drift are 0.5μV and 10nV/°C. The
almost zero DC offset and drift are supported with a power
supply rejection ratio (PSRR) and common mode rejec-
tion ratio (CMRR) of more than 130dB.
■
■
■
■
■
Available in 3mm × 3mm × 0.8mm DFN Package
U
APPLICATIO S
Theinputcommonmodevoltageranges fromthenegative
supply up to typically 1V from the positive supply. The
LTC2051/LTC2052 also have an enhanced output stage
capableofdrivingloads as lowas 2kΩtobothsupplyrails.
The open-loop gain is typically 140dB. The LTC2051/
LTC2052 also feature a 1.5μVP-P DC to 10Hz noise and a
3MHz gain-bandwidth product.
■
Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate RC Active Filters
Low Side Current Sense
■
■
■
■
■
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■
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TYPICAL APPLICATIO
High Performance Low Cost Instrumentation Amplifier
Input Referred Noise 0.1Hz to 10Hz
2
R2
10k
0.1%
R1
100Ω
0.1%
1
R2
10k
0.1%
5V
R1
100Ω
0.1%
8
2
3
0
–
1/2
LTC2051HV
1
6
5
–
1/2
7
–V
+
–1
LTC2051HV
IN
+
V
IN
A = 101
V
4
–2
–5V
20512 TA01
0
2
4
6
8
10
TIME (SEC)
2052 TA02
20512fd
1
LTC2051/ LTC2052
W W
U W
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V–)
Operating Temperature Range ............. –40°C to 125°C
LTC2051/LTC2052 .................................................. 7V Specified Temperature Range (Note 3) –40°C to 125°C
LTC2051HV/LTC2052HV ....................................... 12V Storage Temperature Range ................ – 65°C to 150°C
Input Voltage (Note 5) .......... (V+ + 0.3V) to (V – – 0.3V)
Output Short-Circuit Duration......................... Indefinite
DD Package ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)................. 300°C
U W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
TOP VIEW
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
+
+
OUT A 1
–IN A 2
10
9
8
V
OUT A 1
–IN A 2
8 V
OUT B
–IN B
+IN B
OUT B
–IN B
7 OUT B
6 –IN B
5 +IN B
9
+IN A 3
+IN A 3
–
V
4
7
+IN B
–
–
V 4
V
SHDN A 5
6
SHDN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
MS10 PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 250°C/W
TJMAX = 125°C, θJA = 250°C/W
TJMAX = 125°C, θJA = 160°C/W
–
EXPOSED PAD (PIN 9) IS CONNECTED TO V (PIN 4)
ORDER PART
NUMBER*
DD PART
MARKING
ORDER PART
NUMBER
MS8 PART
MARKING
ORDER PART
NUMBER
MS10 PART
MARKING
LTC2051CDD
LTC2051IDD
LTC2051HVCDD
LTC2051HVIDD
LAAN
LAEL
LTC2051CMS8
LTC2051IMS8
LTC2051HVCMS8
LTC2051HVIMS8
LTC2051HMS8
LTC2051HVHMS8
LTMN
LTMP
LTPJ
LTPK
LTVF
LTVH
LTC2051CMS10
LTC2051IMS10
LTC2051HVCMS10
LTC2051HVIMS10
LTMQ
LTMR
LTRB
LTRC
TOP VIEW
ORDER PART
NUMBER
S8 PART
MARKING
+
OUT A
1
2
3
4
8
V
–IN A
+IN A
7
6
5
OUT B
–IN B
+IN B
LTC2051CS8
LTC2051IS8
LTC2051HVCS8
LTC2051HVIS8
LTC2051HS8
LTC2051HVHS8
2051
2051I
–
V
2051HV
051HVI
2051H
051HVH
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX = 125°C, θJA = 190°C/W
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
20512fd
2
LTC2051/ LTC2052
U W
PACKAGE/ORDER I FOR ATIO
U
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
TOP VIEW
LTC2052CGN
LTC2052IGN
LTC2052HVCGN
LTC2052HVIGN
LTC2052HGN
LTC2052HVHGN
LTC2052CS
OUT A
–IN A
+IN A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OUT D
–IN D
+IN D
OUT A
–IN A
+IN A
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT D
–IN D
+IN D
LTC2052IS
LTC2052HVCS
LTC2052HVIS
LTC2052HS
+
–
V
V
+
–
V
V
+IN B
–IN B
OUT B
NC
+IN C
–IN C
OUT C
NC
+IN B
–IN B
OUT B
LTC2052HVHS
+IN C
–IN C
OUT C
GN PART MARKING
8
2052
2052I
S PACKAGE
14-LEAD PLASTIC SO
GN PACKAGE
16-LEAD PLASTIC SSOP
2052HV
052HVI
2052H
052HVH
TJMAX = 125°C, θJA = 110°C/W
TJMAX = 125°C, θJA = 110°C/W
U
AVAILABLE OPTIO S
PART NUMBER
AMPS/PACKAGE
SPECIFIED TEMP RANGE
SPECIFIED VOLTAGE
3V, 5V
PACKAGE
DD
LTC2051CDD
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
4
4
4
4
0°C to 70°C
0°C to 70°C
LTC2051CS8
3V, 5V
SO-8
LTC2051CMS8
LTC2051CMS10
LTC2051HVCDD
LTC2051HVCS8
LTC2051HVCMS8
LTC2051HVCMS10
LTC2051IDD
0°C to 70°C
3V, 5V
8-Lead MSOP
10-Lead MSOP
DD
0°C to 70°C
3V, 5V
0°C to 70°C
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
0°C to 70°C
SO-8
0°C to 70°C
8-Lead MSOP
10-Lead MSOP
DD
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
0°C to 70°C
LTC2051IS8
3V, 5V
SO-8
LTC2051IMS8
LTC2051IMS10
LTC2051HVIDD
LTC2051HVIS8
LTC2051HVIMS8
LTC2051HVIMS10
LTC2051HS8
3V, 5V
8-Lead MSOP
10-Lead MSOP
DD
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
SO-8
8-Lead MSOP
10-Lead MSOP
SO-8
LTC2051HMS8
LTC2051HVHS8
LTC2051HVHMS8
LTC2052CS
3V, 5V
8-Lead MSOP
SO-8
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
8-Lead MSOP
14-Lead SO
16-Lead SSOP
14-Lead SO
16-Lead SSOP
LTC2052CGN
0°C to 70°C
3V, 5V
LTC2052HVCS
LTC2052HVCGN
0°C to 70°C
3V, 5V, ±5V
3V, 5V, ±5V
0°C to 70°C
20512fd
3
LTC2051/ LTC2052
U
AVAILABLE OPTIO S
PART NUMBER
AMPS/PACKAGE
SPECIFIED TEMP RANGE
–40°C to 85°C
SPECIFIED VOLTAGE
3V, 5V
PACKAGE
14-Lead SO
16-Lead SSOP
14-Lead SO
16-Lead SSOP
14-Lead SO
16-Lead SSOP
14-Lead SO
16-Lead SSOP
LTC2052IS
4
4
4
4
4
4
4
4
LTC2052IGN
LTC2052HVIS
LTC2052HVIGN
LTC2052HS
–40°C to 85°C
3V, 5V
–40°C to 85°C
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
LTC2052HGN
LTC2052HVHS
LTC2052HVHGN
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
ELECTRICAL CHARACTERISTICS
(LTC2051/LTC2052, LTC2051HV/LTC2052HV) The ● denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V = 3V, 5V
S
unless otherwise noted. (Note 3)
LTC2051C/LTC2052C
LTC2051I/LTC2052I
LTC2051H/LTC2052H
PARAMETER
CONDITIONS
(Note 2)
MIN
TYP
±0.5
0.01
50
MAX
MIN
TYP
±0.5
0.01
50
MAX
UNITS
μV
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current (Note 4)
±3
±3
(Note 2)
●
±0.03
±0.05
μV/°C
nV/√mo
V = 3V
±8
±50
±100
±8
±50
±3000
pA
pA
S
V = 3V
S
●
●
●
●
V = 5V
±25
±75
±25
±75
pA
pA
S
V = 5V
S
±150
±3000
Input Offset Current (Note 4)
V = 3V
±100
±150
±100
±700
pA
pA
S
V = 3V
S
V = 5V
±150
±200
±150
±700
pA
pA
S
V = 5V
S
Input Noise Voltage
R = 100Ω, DC to 10Hz
S
1.5
1.5
μV
P-P
+
Common Mode Rejection Ratio
V
= GND to V – 1.3,
115
110
130
130
115
110
130
130
dB
dB
CM
V = 3V
S
●
●
●
●
●
+
V
= GND to V – 1.3,
120
115
130
130
120
115
130
130
dB
dB
CM
V = 5V
S
Power Supply Rejection Ratio
Large-Signal Voltage Gain
120
115
130
130
120
115
130
130
dB
dB
R = 10k, V = 3V
120
115
140
140
120
115
140
140
dB
dB
L
S
R = 10k, V = 5V
125
120
140
140
125
120
140
140
dB
dB
L
S
+
+
+
+
Output Voltage Swing High
Output Voltage Swing Low
R = 2k to GND
R = 10k to GND
L
●
●
V – 0.15 V – 0.06
V – 0.15 V – 0.06
V
V
L
+
+
+
+
V – 0.05 V – 0.02
V – 0.05 V – 0.02
R = 2k to GND
●
●
2
2
15
15
2
2
15
15
mV
mV
L
R = 10k to GND
L
Slew Rate
2
2
V/μs
MHz
mA
mA
Gain Bandwidth Product
Supply Current (Per Amplifier)
3
3
No Load, V = 3V, V
= V
IH
●
●
0.75
0.85
1.0
1.2
0.75
0.85
1.1
1.3
S
SHDN
No Load, V = 5V, V
= V
IH
S
SHDN
Supply Current, Shutdown
V
V
SHDN
= V , V = 3V
●
●
2
4
5
10
2
4
5
10
μA
μA
SHDN
IL
S
= V , V = 5V
IL
S
20512fd
4
LTC2051/ LTC2052
ELECTRICAL CHARACTERISTICS
(LTC2051/LTC2052, LTC2051HV/LTC2052HV) The ● denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V = 3V, 5V
S
unless otherwise noted. (Note 3)
LTC2051C/LTC2052C
LTC2051I/LTC2052I
LTC2051H/LTC2052H
PARAMETER
Shutdown Pin Input Low Voltage (V )
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
–
–
●
●
V + 0.5
V + 0.5
V
V
IL
+
+
Shutdown Pin Input High Voltage (V )
V – 0.5
V – 0.5
IH
Shutdown Pin Input Current
V
V
SHDN
= V , V = 3V
●
●
–1
–2
–3
–5
–1
–2
–3
–5
μA
μA
SHDN
IL
S
= V , V = 5V
IL S
Internal Sampling Frequency
7.5
7.5
kHz
(LTC2051HV/LTC2052HV) The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. V = ±5V unless otherwise noted. (Note 3)
S
LTC2051C/LTC2052C
LTC2051I/LTC2052I
LTC2051H/LTC2052H
PARAMETER
CONDITIONS
(Note 2)
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
μV
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current (Note 4)
±1
±3
±1
±3
(Note 2)
●
0.01
50
±0.03
0.01
50
±0.05
μV/°C
nV/√mo
±90
±150
±300
±90
±150
±3000
pA
pA
●
●
Input Offset Current (Note 4)
±300
±500
±300
±700
pA
pA
Input Noise Voltage
R = 100Ω, DC to 10Hz
S
1.5
1.5
μV
P-P
–
+
Common Mode Rejection Ratio
V
= V to V – 1.3
125
120
130
130
125
120
130
130
dB
dB
CM
●
●
●
Power Supply Rejection Ratio
Large-Signal Voltage Gain
120
115
130
130
120
115
130
130
dB
dB
R = 10k
125
120
140
140
125
120
140
140
dB
dB
L
Maximum Output Voltage Swing
R = 2k to GND
R = 10k to GND
L
●
●
±4.75
±4.90
±4.92
±4.98
±4.50
±4.85
±4.92
±4.98
V
V
L
Slew Rate
2
3
2
3
V/μs
MHz
mA
μA
Gain Bandwidth Product
Supply Current (Per Amplifier)
Supply Current, Shutdown
No Load, V
= V
●
●
1
1.5
30
1
1.5
30
SHDN
IH
V
= V
15
15
SHDN
IL
–
–
Shutdown Pin Input Low Voltage (V )
●
●
V + 0.5
V + 0.5
V
V
IL
+
+
Shutdown Pin Input High Voltage (V )
V – 0.5
V – 0.5
IH
Shutdown Pin Input Current
Internal Sampling Frequency
V
SHDN
= V
●
–7
–15
–7
–15
μA
IL
7.5
7.5
kHz
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.
are guaranteed to meet the temperature limits of –40°C and 125°C.
Note 4: The bias current measurement accuracy depends on the proximity of
the negative supply bypass capacitors to the device under test. Because of
this, only the bias current of channel B (LTC2051) and channels A and B
(LTC2052) are 100% tested to the data sheet specifications. The bias
currents of the remaining channels are 100% tested to relaxed limits,
however, their values are guaranteed by design to meet the data sheet limits.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels during automated testing.
Note 3: All versions of the LTC2051/LTC2052 are designed, characterized
and expected to meet the extended temperature limits of –40°C and 125°C.
The LTC2051C/LTC2052C/LTC2051HVC/LTC2052HVC are guaranteed to
meet the temperature limits of 0°C and 70°C. The LTC2051I/LTC2052I/
LTC2051HVI/LTC2052HVI are guaranteed to meet temperature limits of –
40°C and 85°C. The LTC2051H/LTC2051HVH and LTC2052H/LTC2052HVH
Note 5: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 6: The θ specified for the DD package is with minimal PCB heat
JA
spreading metal. Using expanded metal area on all layers of a board
reduces this value.
20512fd
5
LTC2051/ LTC2052
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
DC CMRR
vs Common Mode Input Range
PSRR vs Frequency
120
100
80
60
40
20
0
140
120
140
120
V = 3V OR ±5V
S
V
CM
= 0.5V
P-P
V = 10V
S
–PSRR
100
80
60
40
20
0
100
80
60
40
20
0
V = 3V
S
V = 5V
S
+PSRR
1
10
100
1k
10k
100k
10
100
1k
10k
100k
1M
2
4
10
0
6
8
FREQUENCY (Hz)
FREQUENCY (Hz)
V
CM
(V)
20512 G01
20512 G03
20512 G02
Output Voltage Swing
vs Load Resistance
Output Swing
vs Load Resistance ±5V
Output Swing vs Output Current
6
5
6
5
4
3
2
1
0
5
R
L
TO GND
4
3
V = 5V
S
V = 5V
S
R
L
TO GND
2
4
3
1
V = 3V
S
V = 3V
S
0
–1
–2
–3
–4
–5
2
1
0
0
2
4
6
8
10
0.01
0.1
1
10
0
2
4
6
8
10
OUTPUT CURRENT (mA)
LOAD RESISTANCE (kΩ)
LOAD RESISTANCE (kΩ)
20512 G04
20512 G05
20512 G06
Output Swing
vs Output Current, ±5V Supply
Bias Current vs Temperature
Gain/Phase vs Frequency
100
80
80
10k
1k
5
4
PHASE
R
L
TO GND
100
120
140
160
180
200
3
2
1
60
40
GAIN
V = ±5V
S
100
0
20
V = 5V
S
–1
–2
–3
–4
–5
0
V = 3V
S
10
1
V = 3V OR ±5V
S
–20
–40
C = 50pF
L
R
L
= 100k
100
1k
10k
100k
1M
10M
–50
0
50
100 125
0.01
1
10
0.1
TEMPERATURE (°C)
FREQUENCY (Hz)
OUTPUT CURRENT (mA)
20512 G09
20512 G08
20512 G07
20512fd
6
LTC2051/ LTC2052
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Input Common Mode Voltage
Transient Response
Input Overload Recovery
250
200
150
100
50
0
–0.1
1.5
V = ±5V
0
S
20512 G11
2050 G12
V = 5V
S
AV = 1
RL = 10k
CL = 100pF
1μs/DIV
A = –100
V
RL = 100k
CL = 10pF
500μs/DIV
V = 3V
S
0
V = ±5V
S
V = 3V
S
–5
–3
–1
0
1
3
5
INPUT COMMON MODE VOLTAGE (V)
20512 G10
Sampling Frequency
vs Supply Voltage
Sampling Frequency
vs Temperature
10
9
10
9
8
8
V = ±5V
S
V = 3V
S
7
7
6
6
5
5
–50
3
5
7
9
0
50
100
11
125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
20512 G13
20512 G14
Supply Current (Per Amplifier)
vs Supply Voltage
Supply Current (Per Amplifier)
vs Temperature
1.2
1.0
1.2
1.0
0.8
0.6
0.4
0.2
0
V = ±5V
S
V = 5V
S
0.8
0.6
V = 3V
S
0.4
0.2
0
2.5
4.5
6.5
8.5
10.5
–50
0
50
TEMPERATURE (°C)
100
125
SUPPLY VOLTAGE (V)
20512 G15
20512 G16
20512fd
7
LTC2051/ LTC2052
W U U
U
APPLICATIO S I FOR ATIO
Shutdown
To reduce this form of clock feedthrough, use smaller
valued gain setting resistors and minimize the source
resistance at the input. If the resistance seen at the inputs
is less than 10k, this form of clock feedthrough is less
than 1μVRMS input referred at 7.5kHz, or less than the
amount of residue clock feedthrough from the first form
previously described.
The LTC2051 includes a shutdown pin in the 10-lead
MSOP. When this active low pin is high or allowed to float,
the device operates normally. When the shutdown pin is
pulled low, the device enters shutdown mode; supply
current drops to 3μA, all clocking stops and the output
assumes a high impedance state.
Placing a capacitor across the feedback resistor reduces
eitherformofclockfeedthroughbylimitingthebandwidth
of the closed-loop gain.
Clock Feedthrough, Input Bias Current
TheLTC2051/LTC2052useautozeroingcircuitrytoachieve
an almost zero DC offset over temperature, common
mode voltage and power supply voltage. The frequency of
the clock used for autozeroing is typically 7.5kHz. The
term clock feedthrough is broadly used to indicate visibil-
ity of this clock frequency in the op amp output spectrum.
There are typically two types of clock feedthrough in
autozeroed op amps like the LTC2051/LTC2052.
Input bias current is defined as the DC current into the
input pins of the op amp. The same current spikes that
cause the second form of clock feedthrough previously
described, when averaged, dominate the DC input bias
current of the op amp below 70°C.
At temperatures above 70°C, the leakage of the ESD
protection diodes on the inputs increase the input bias
currents of both inputs in the positive direction, while the
current caused by the charge injection stays relatively
constant. At elevated temperatures (above 85°C) the
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
Thefirstformofclockfeedthoughis causedbythesettling
of the internal sampling capacitor and is input referred;
that is, it is multiplied by the closed-loop gain of the op
amp. This form of clock feedthrough is independent of the
magnitudeoftheinputsourceresistanceorthemagnitude
of the gain setting resistors. The LTC2051/LTC2052 have
a residue clock feedthrough of less than 1μV
input
RMS
referred at 7.5kHz.
Input Pins, ESD Sensitivity
The second form of clock feedthrough is caused by the
small amount of charge injection occurring during the
sampling and holding of the op amps input offset voltage.
The current spikes are multiplied by the impedance seen
at the input terminals of the op amp, appearing at the
output multiplied by the closed-loop gain of the op amp.
ESD voltages above 700V on the input pins of the op amp
will cause the input bias currents to increase (more DC
current into the pins). At these voltages, it is possible to
damage the device to a point where the input bias current
exceeds the maximums specified in this data sheet.
U
TYPICAL APPLICATIO
The dual chopper op amp buffers the inputs of A1 and
corrects its offset voltage and offset voltage drift. With the
needed and the input source resistance is low. (For in-
stance a 350Ω strain gauge bridge.) The LT1012 or
RC values shown, the power-up warm-up time is typically equivalent should be used when low bias current (100pA)
20 seconds. The step response of the composite amplifier
does not present settling tails. The LT®1677 should be
used when extremely low noise, VOS and VOS drift are
is also required in conjunction with DC to 10Hz low noise,
low VOS and VOS drift. The measured typical input offset
voltages are less than 1μV.
20512fd
8
LTC2051/ LTC2052
U
TYPICAL APPLICATIO
Obtaining Ultralow VOS Drift and Low Noise
+
5
+
2
7
1/2 LTC2051
–
R4
1
6
1/2 LTC2051
–
3
+
C1
5V
R5
OUT
20512 F01
C2
R1
R2
R3
1
3
2
+
–
8
6
A1
OUT
–
A1
R1
R2
R3
R4
R5
C1
C2
e
(DC – 1Hz)
e
(DC – 10Hz)
IN
IN
LT1677
LT1012
2.49k
750Ω
3.01k
57Ω
340k
250k
10k
10k
100k
100k
0.01μF
0.01μF
0.001μF
0.001μF
0.15μV
0.2μV
P-P
P-P
0.3μV
0.4μV
P-P
P-P
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
0.38 ± 0.10
TYP
5
8
0.675 ±0.05
3.5 ±0.05
1.65 ±0.05
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
2.15 ±0.05 (2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
PACKAGE
OUTLINE
4
1
0.25 ± 0.05
0.75 ±0.05
0.200 REF
0.25 ± 0.05
0.50 BSC
0.50
BSC
2.38 ±0.10
(2 SIDES)
2.38 ±0.05
0.00 – 0.05
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
NOTE:
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
(DD) DFN 1203
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
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 TOP AND BOTTOM OF PACKAGE
20512fd
9
LTC2051/ LTC2052
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.86
0.52
(.0205)
REF
0.53 ± 0.152
(.021 ± .006)
1.10
(.043)
MAX
8
7 6
5
0.889 ± 0.127
(.035 ± .005)
(.034)
REF
DETAIL “A”
0.18
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
(.007)
4.90 ± 0.152
(.193 ± .006)
5.23
(.206)
MIN
SEATING
PLANE
3.20 – 3.45
(.126 – .136)
0.22 – 0.38
(.009 – .015)
TYP
0.127 ± 0.076
(.005 ± .003)
0.65
(.0256)
BSC
NOTE:
1
2
3
4
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 (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ± .0015)
TYP
RECOMMENDED SOLDER PAD LAYOUT
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
MSOP (MS8) 0204
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.497 ± 0.076
(.0196 ± .003)
REF
10 9
8
7 6
0.889 ± 0.127
(.035 ± .005)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0° – 6° TYP
5.23
(.206)
MIN
0.254
(.010)
3.20 – 3.45
(.126 – .136)
GAUGE PLANE
1
2
3
4 5
0.50
(.0197)
BSC
0.305 ± 0.038
(.0120 ± .0015)
TYP
0.53 ± 0.152
(.021 ± .006)
0.86
(.034)
REF
1.10
(.043)
MAX
DETAIL “A”
RECOMMENDED SOLDER PAD LAYOUT
0.18
MSOP (MS) 0603
(.007)
SEATING
PLANE
0.17 – 0.27
(.007 – .011)
TYP
0.127 ± 0.076
(.005 ± .003)
0.50
(.0197)
BSC
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 (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
20512fd
10
LTC2051/ LTC2052
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.010 – .020
(0.254 – 0.508)
7
5
8
6
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.050 BSC
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.150 – .157
.245
.228 – .244
(5.791 – 6.197)
(3.810 – 3.988)
NOTE 3
.160 ±.005
.016 – .050
(0.406 – 1.270)
MIN
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
SO8 0303
NOTE:
INCHES
1. DIMENSIONS IN
(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)
.030 ±.005
TYP
1
2
3
4
RECOMMENDED SOLDER PAD LAYOUT
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.015 ± .004
(0.38 ± 0.10)
× 45°
.0532 – .0688
(1.35 – 1.75)
.004 – .0098
(0.102 – 0.249)
.189 – .196*
(4.801 – 4.978)
.045 ±.005
.009
(0.229)
REF
.007 – .0098
(0.178 – 0.249)
0° – 8° TYP
16 15 14 13 12 11 10 9
.016 – .050
.0250
.008 – .012
.254 MIN
.150 – .165
(0.406 – 1.270)
(0.635)
BSC
(0.203 – 0.305)
TYP
NOTE:
.229 – .244
(5.817 – 6.198)
.150 – .157**
(3.810 – 3.988)
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
.0165 ±.0015
.0250 BSC
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
RECOMMENDED SOLDER PAD LAYOUT
GN16 (SSOP) 0204
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
2
3
4
5
6
7
8
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
.045 ±.005
(8.560 – 8.738)
NOTE 3
.050 BSC
14
N
13
12
11
10
9
8
N
.245
MIN
.160 ±.005
.150 – .157
.228 – .244
(3.810 – 3.988)
NOTE 3
(5.791 – 6.197)
1
2
3
N/2
N/2
7
.030 ±.005
TYP
RECOMMENDED SOLDER PAD LAYOUT
1
2
3
4
5
6
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
.008 – .010
(0.101 – 0.254)
(0.203 – 0.254)
0° – 8° TYP
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
.016 – .050
(0.406 – 1.270)
S14 0502
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)
20512fd
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 represen-
tationthattheinterconnectionofits circuits as describedhereinwillnotinfringeonexistingpatentrights.
11
LTC2051/ LTC2052
U
TYPICAL APPLICATIO
Paralleling Amplifiers to Improve Noise
R2
R1
R1
R1
2
–
R
1
1/4 LTC2052
3
+
R
5V
R2
0.1μF
6
V
IN
–
R
7
13
12
4
1/4 LTC2052
–
5
14
+
V
OUT
1/4 LTC2052
+
11
R2
0.1μF
–5V
9
–
R
8
1/4 LTC2052
10
+
V
OUT
R2
R1
NOISE OF EACH PARALLEL OP AMP
= 3
; INPUT DC – 10Hz NOISE ≅ 0.8μV =
P-P
V
IN
√3
20512 F02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1051/LTC1053 Precision Zero-Drift Op Amp
Dual/Quad
LTC1151
LTC1152
LTC2050
LTC2053
LTC6800
±15V Zero-Drift Op Amp
Dual High Voltage Operation ±18V
Rail-to-Rail Input and Output Zero-Drift Op Amp
Zero-Drift Op Amp in SOT-23
Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown
Single Supply Operation 2.7V to ±5V, Shutdown
MS8, 116dB CMRR, Two External Resistors Set Gain
Low Cost, MS8, Two External Resistors Set Gain
Zero-Drift Precision Instrumentation Amp
Rail-to-Rail Input and Output Instrumentation Amp
20512fd
LT 0108 REV D • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
© LINEAR TECHNOLOGY CORPORATION 2000
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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