LINER LTC2051HVCMS8 Dual/quad zero-drift operational amplifier Datasheet

LTC2051/LTC2052
Dual/Quad Zero-Drift
Operational Amplifiers
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FEATURES
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DESCRIPTIO
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
Available in 3mm × 3mm × 0.8mm DFN Package
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APPLICATIO S
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The LTC2051/LTC2052, despite their miniature size, feature 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 rejection ratio (CMRR) of more than 130dB.
The input common mode voltage ranges from the negative
supply up to typically 1V from the positive supply. The
LTC2051/LTC2052 also have an enhanced output stage
capable of driving loads as low as 2kΩ to both supply rails.
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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The LTC®2051/LTC2052 are dual/quad zero-drift operational amplifiers available in the MS8 and SO-8/GN16 and
S14 packages. For space limited applications, the LTC2051
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 consumption is 750μA per op amp.
TYPICAL APPLICATIO
High Performance Low Cost Instrumentation Amplifier
Input Referred Noise 0.1Hz to 10Hz
2
R2
10k
0.1%
R1
100Ω
0.1%
5V
2
–
8
1/2
LTC2051HV
–VIN
1
3
1
R1
100Ω
0.1%
μV
R2
10k
0.1%
6
–
1/2
LTC2051HV
+
VIN
5
0
+
4
–5V
7
–1
AV = 101
20512 TA01
–2
0
2
4
6
TIME (SEC)
8
10
2052 TA02
20512fd
1
LTC2051/LTC2052
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ABSOLUTE
RATI GS
(Note 1)
Total Supply Voltage (V + to V –)
LTC2051/LTC2052 .................................................. 7V
LTC2051HV/LTC2052HV ....................................... 12V
Input Voltage (Note 5) .......... (V + + 0.3V) to (V – – 0.3V)
Output Short-Circuit Duration ......................... Indefinite
Operating Temperature Range ............. – 40°C to 125°C
Specified Temperature Range (Note 3) – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
DD Package ...................................... – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)................. 300°C
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
8
–IN A 2
9
+IN A 3
V– 4
TOP VIEW
V+
7
OUT B
6
–IN B
5
+IN B
OUT A
–IN A
+IN A
V–
1
2
3
4
TOP VIEW
8
7
6
5
OUT A
–IN A
+IN A
V–
SHDN A
V+
OUT B
–IN B
+IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
V+
OUT B
–IN B
+IN B
SHDN B
MS10 PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 250°C/W
TJMAX = 125°C, θJA = 160°C/W
10
9
8
7
6
1
2
3
4
5
TJMAX = 125°C, θJA = 250°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
LTC2051CMS8
LTC2051IMS8
LTC2051HVCMS8
LTC2051HVIMS8
LTC2051HMS8
LTC2051HVHMS8
LTMN
LTMP
LTPJ
LTPK
LTVF
LTVH
LTC2051CMS10
LTC2051IMS10
LTC2051HVCMS10
LTC2051HVIMS10
LTMQ
LTMR
LTRB
LTRC
LAEL
TOP VIEW
OUT A 1
8
V+
–IN A 2
7
OUT B
+IN A 3
6
–IN B
V– 4
5
+IN B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 190°C/W
ORDER PART
NUMBER
S8 PART
MARKING
LTC2051CS8
LTC2051IS8
LTC2051HVCS8
LTC2051HVIS8
LTC2051HS8
LTC2051HVHS8
2051
2051I
2051HV
051HVI
2051H
051HVH
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
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PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
OUT A
1
16 OUT D
–IN A
2
15 –IN D
+IN A
3
14 +IN D
V+
4
13 V –
+IN B
5
12 +IN C
–IN B
6
11 –IN C
OUT B
NC
7
8
10 OUT C
9
LTC2052CGN
LTC2052IGN
LTC2052HVCGN
LTC2052HVIGN
LTC2052HGN
LTC2052HVHGN
GN PART MARKING
NC
ORDER PART
NUMBER
TOP VIEW
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3
12 +IN D
V+ 4
+IN B 5
10 +IN C
–IN B 6
9
–IN C
OUT B 7
8
OUT C
2052
2052I
2052HV
052HVI
2052H
052HVH
GN PACKAGE
16-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 110°C/W
11 V –
LTC2052CS
LTC2052IS
LTC2052HVCS
LTC2052HVIS
LTC2052HS
LTC2052HVHS
S PACKAGE
14-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 110°C/W
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AVAILABLE OPTIO S
PART NUMBER
LTC2051CDD
LTC2051CS8
LTC2051CMS8
LTC2051CMS10
LTC2051HVCDD
LTC2051HVCS8
LTC2051HVCMS8
LTC2051HVCMS10
LTC2051IDD
LTC2051IS8
LTC2051IMS8
LTC2051IMS10
LTC2051HVIDD
LTC2051HVIS8
LTC2051HVIMS8
LTC2051HVIMS10
LTC2051HS8
LTC2051HMS8
LTC2051HVHS8
LTC2051HVHMS8
LTC2052CS
LTC2052CGN
LTC2052HVCS
LTC2052HVCGN
AMPS/PACKAGE
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
4
4
4
4
SPECIFIED TEMP RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
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
0°C to 70°C
0°C to 70°C
0°C to 70°C
SPECIFIED VOLTAGE
3V, 5V
3V, 5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
PACKAGE
DD
SO-8
8-Lead MSOP
10-Lead MSOP
DD
SO-8
8-Lead MSOP
10-Lead MSOP
DD
SO-8
8-Lead MSOP
10-Lead MSOP
DD
SO-8
8-Lead MSOP
10-Lead MSOP
SO-8
8-Lead MSOP
SO-8
8-Lead MSOP
14-Lead SO
16-Lead SSOP
14-Lead SO
16-Lead SSOP
20512fd
3
LTC2051/LTC2052
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AVAILABLE OPTIO S
PART NUMBER
LTC2052IS
LTC2052IGN
LTC2052HVIS
LTC2052HVIGN
LTC2052HS
LTC2052HGN
LTC2052HVHS
LTC2052HVHGN
AMPS/PACKAGE
4
4
4
4
4
4
4
4
SPECIFIED TEMP RANGE
–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
SPECIFIED VOLTAGE
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±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
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. VS = 3V, 5V
unless otherwise noted. (Note 3)
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current (Note 4)
Input Offset Current (Note 4)
Input Noise Voltage
Common Mode Rejection Ratio
CONDITIONS
(Note 2)
(Note 2)
VS = 3V
VS = 3V
VS = 5V
VS = 5V
VS = 3V
VS = 3V
VS = 5V
VS = 5V
RS = 100Ω, DC to 10Hz
VCM = GND to V + – 1.3,
VS = 3V
VCM = GND to V + – 1.3,
VS = 5V
●
●
●
●
●
●
●
Power Supply Rejection Ratio
●
Large-Signal Voltage Gain
RL = 10k, VS = 3V
RL = 10k, VS = 5V
Output Voltage Swing High
Output Voltage Swing Low
Slew Rate
Gain Bandwidth Product
Supply Current (Per Amplifier)
Supply Current, Shutdown
●
●
RL = 2k to GND
RL = 10k to GND
RL = 2k to GND
RL = 10k to GND
●
●
No Load, VS = 3V, VSHDN = VIH
No Load, VS = 5V, VSHDN = VIH
VSHDN = VIL, VS = 3V
VSHDN = VIL, VS = 5V
●
●
●
●
●
●
LTC2051C/LTC2052C
LTC2051I/LTC2052I
MIN
TYP
MAX
±0.5
±3
0.01
±0.03
50
±8
±50
±100
±25
±75
±150
±100
±150
±150
±200
1.5
115
130
110
130
120
130
115
130
120
130
115
130
120
140
115
140
125
140
120
140
V+ – 0.15 V+ – 0.06
V+ – 0.05 V+ – 0.02
2
15
2
15
2
3
0.75
1.0
0.85
1.2
2
5
4
10
LTC2051H/LTC2052H
MIN
TYP
MAX
±0.5
±3
0.01
±0.05
50
±8
±50
±3000
±25
±75
±3000
±100
±700
±150
±700
1.5
115
130
110
130
120
130
115
130
120
130
115
130
120
140
115
140
125
140
120
140
V+ – 0.15 V+ – 0.06
V+ – 0.05 V+ – 0.02
2
15
2
15
2
3
0.75
1.1
0.85
1.3
2
5
4
10
UNITS
μV
μV/°C
nV/√mo
pA
pA
pA
pA
pA
pA
pA
pA
μVP-P
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
V
V
mV
mV
V/μs
MHz
mA
mA
μA
μA
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. VS = 3V, 5V
unless otherwise noted. (Note 3)
PARAMETER
Shutdown Pin Input Low Voltage (VIL)
Shutdown Pin Input High Voltage (VIH)
Shutdown Pin Input Current
CONDITIONS
●
●
VSHDN = VIL, VS = 3V
VSHDN = VIL, VS = 5V
●
●
Internal Sampling Frequency
LTC2051C/LTC2052C
LTC2051I/LTC2052I
MIN
TYP
MAX
V – + 0.5
V + – 0.5
–1
–3
–2
–5
7.5
LTC2051H/LTC2052H
MIN
TYP
MAX
V – + 0.5
V + – 0.5
–1
–3
–2
–5
7.5
UNITS
V
V
μA
μA
kHz
(LTC2051HV/LTC2052HV) The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3)
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current (Note 4)
CONDITIONS
(Note 2)
(Note 2)
●
●
Input Offset Current (Note 4)
●
Input Noise Voltage
Common Mode Rejection Ratio
RS = 100Ω, DC to 10Hz
VCM = V – to V + – 1.3
●
Power Supply Rejection Ratio
●
Large-Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Gain Bandwidth Product
Supply Current (Per Amplifier)
Supply Current, Shutdown
Shutdown Pin Input Low Voltage (VIL)
Shutdown Pin Input High Voltage (VIH)
Shutdown Pin Input Current
Internal Sampling Frequency
RL = 10k
●
RL = 2k to GND
RL = 10k to GND
●
●
No Load, VSHDN = VIH
VSHDN = VIL
●
●
●
●
VSHDN = VIL
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 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
●
LTC2051C/LTC2052C
LTC2051I/LTC2052I
MIN
TYP
MAX
±1
±3
0.01
±0.03
50
±90
±150
±300
±300
±500
1.5
125
130
120
130
120
130
115
130
125
140
120
140
±4.75
±4.92
±4.90
±4.98
2
3
1
1.5
15
30
V – + 0.5
V + – 0.5
–7
–15
7.5
LTC2051H/LTC2052H
MIN
TYP
MAX
UNITS
±1
±3
μV
0.01
±0.05
μV/°C
50
nV/√mo
±90
±150
pA
±3000
pA
±300
pA
±700
pA
1.5
μVP-P
125
130
dB
120
130
dB
120
130
dB
115
130
dB
125
140
dB
120
140
dB
±4.50
±4.92
V
±4.85
±4.98
V
2
V/μs
3
MHz
1
1.5
mA
15
30
μA
V – + 0.5
V
V + – 0.5
V
–7
– 15
μA
7.5
kHz
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 5: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 6: The θJA specified for the DD package is with minimal PCB heat
spreading metal. Using expanded metal area on all layers of a board
reduces this value.
20512fd
5
LTC2051/LTC2052
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TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
140
DC CMRR
vs Common Mode Input Range
VS = 3V OR ±5V
VCM = 0.5VP-P
120
120
100
100
VS = 10V
–PSRR
100
60
PSRR (dB)
80
80
VS = 5V
VS = 3V
CMRR (dB)
CMRR (dB)
PSRR vs Frequency
120
140
80
60
60
+PSRR
40
40
40
20
20
0
1
100
1k
FREQUENCY (Hz)
10
0
0
100k
10k
20
0
2
4
6
4
VS = 3V
2
5
4
VS = 5V
4
3
VS = 3V
2
1
1
0
0
0.01
RL TO GND
3
OUTPUT VOLTAGE (V)
5
OUTPUT VOLTAGE (V)
OUTPUT SWING (V)
Output Swing
vs Load Resistance ±5V
6
VS = 5V
1M
20512 G03
Output Swing vs Output Current
RL TO GND
3
100k
20512 G02
Output Voltage Swing
vs Load Resistance
5
1k
10k
FREQUENCY (Hz)
VCM (V)
20512 G01
6
100
10
10
8
2
1
0
–1
–2
–3
–4
0
2
10
8
4
6
LOAD RESISTANCE (kΩ)
0.1
1
OUTPUT CURRENT (mA)
20512 G04
6
8
4
LOAD RESISTANCE (kΩ)
10
Bias Current vs Temperature
10k
80
PHASE
80
100
1k
60
2
120
GAIN
GAIN (dB)
1
0
–1
40
140
20
160
–2
0
–3
–4
–5
0.01
1
0.1
OUTPUT CURRENT (mA)
10
20512 G07
V = 3V OR ±5V
–20 CS = 50pF
L
RL = 100k
–40
1k
100
10k
100k
FREQUENCY (Hz)
BIAS CURRENT (pA)
RL TO GND
PHASE (DEG)
OUTPUT SWING (V)
2
20512 G06
Gain/Phase vs Frequency
100
5
3
0
20512 G05
Output Swing
vs Output Current, ±5V Supply
4
–5
10
100
VS = ±5V
VS = 5V
10
VS = 3V
180
1M
200
10M
20512 G08
1
–50
50
0
TEMPERATURE (°C)
100
125
20512 G09
20512fd
6
LTC2051/LTC2052
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TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Input Common Mode Voltage
Transient Response
Input Overload Recovery
INPUT (V)
150
OUTPUT (V)
2V/DIV
200
100
VS = ±5V
50
VS = 5V
AV = 1
RL = 10k
CL = 100pF
VS = ±5V
VS = 3V
–3
1
3
–1
0
INPUT COMMON MODE VOLTAGE (V)
5
0
– 0.1
1.5
0
20512 G11
1μs/DIV
AV = – 100
RL = 100k
CL = 10pF
VS = 3V
500μs/DIV
2050 G12
20512 G10
Sampling Frequency
vs Supply Voltage
Sampling Frequency
vs Temperature
10
SAMPLING FREQUENCY (kHz)
10
9
8
7
6
5
3
5
7
9
9
8
VS = ±5V
VS = 3V
7
6
5
–50
11
SUPPLY VOLTAGE (V)
50
0
TEMPERATURE (°C)
20512 G13
100
125
20512 G14
Supply Current (Per Amplifier)
vs Supply Voltage
Supply Current (Per Amplifier)
vs Temperature
1.2
1.2
1.0
1.0
SUPPLY CURRENT (mA)
–5
SAMPLING FREQUENCY (kHz)
0
SUPPLY CURRENT (mA)
INPUT BIAS CURRENT (pA)
250
0.8
0.6
0.4
0.2
0.8
0.6
VS = ±5V
VS = 5V
VS = 3V
0.4
0.2
0
2.5
4.5
6.5
8.5
SUPPLY VOLTAGE (V)
10.5
20512 G15
0
–50
50
0
TEMPERATURE (°C)
100
125
20512 G16
20512fd
7
LTC2051/LTC2052
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APPLICATIO S I FOR ATIO
Shutdown
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.
Clock Feedthrough, Input Bias Current
The LTC2051/LTC2052 use autozeroing circuitry to achieve
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 visibility 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.
The first form of clock feedthough is caused by the settling
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
magnitude of the input source resistance or the magnitude
of the gain setting resistors. The LTC2051/LTC2052 have
a residue clock feedthrough of less than 1μVRMS input
referred at 7.5kHz.
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.
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.
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed-loop gain.
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).
Input Pins, ESD Sensitivity
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
RC values shown, the power-up warm-up time is typically
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
needed and the input source resistance is low. (For instance a 350Ω strain gauge bridge.) The LT1012 or
equivalent should be used when low bias current (100pA)
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
–
1
1/2 LTC2051
3
+
+
1/2 LTC2051
R4
6
5V
7
–
C1
R5
20512 F01
C2
R1
OUT
R2
R3
3
+
1
8
6
A1
2
–
OUT
–
A1
R1
R2
R3
R4
R5
C1
C2
eIN (DC – 1Hz)
eIN (DC – 10Hz)
LT1677
2.49k
3.01k
340k
10k
100k
0.01μF
0.001μF
0.15μVP-P
0.2μVP-P
LT1012
750Ω
57Ω
250k
10k
100k
0.01μF
0.001μF
0.3μVP-P
0.4μVP-P
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
TYP
5
0.38 ± 0.10
8
0.675 ±0.05
3.00 ±0.10
(4 SIDES)
3.5 ±0.05
1.65 ±0.05
2.15 ±0.05 (2 SIDES)
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
PACKAGE
OUTLINE
0.75 ±0.05
0.00 – 0.05
4
0.25 ± 0.05
1
0.50 BSC
2.38 ±0.10
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
NOTE:
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
0.25 ± 0.05
0.50
BSC
2.38 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
(DD) DFN 1203
20512fd
9
LTC2051/LTC2052
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.254
(.010)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
0.53 ± 0.152
(.021 ± .006)
1.10
(.043)
MAX
DETAIL “A”
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.86
(.034)
REF
0.18
(.007)
SEATING
PLANE
8
7 6 5
0.127 ± 0.076
(.005 ± .003)
0.65
(.0256)
NOTE:
BSC
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
0.889 ± 0.127
(.035 ± .005)
3.00 ± 0.102
(.118 ± .004) 5.23
(NOTE 4) (.206)
MIN
4.90 ± 0.152
(.193 ± .006)
0.22 – 0.38
(.009 – .015)
TYP
0.52
(.0205)
REF
1
2 3
3.20 – 3.45
(.126 – .136)
4
0.65
(.0256)
BSC
0.42 ± 0.038
(.0165 ± .0015)
TYP
RECOMMENDED SOLDER PAD LAYOUT
MSOP (MS8) 0204
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
10 9 8 7 6
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0.497 ± 0.076
(.0196 ± .003)
REF
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
0° – 6° TYP
3.20 – 3.45
(.126 – .136)
GAUGE PLANE
1 2 3 4 5
0.53 ± 0.152
(.021 ± .006)
DETAIL “A”
0.86
(.034)
REF
1.10
(.043)
MAX
0.50
0.305 ± 0.038
(.0197)
(.0120 ± .0015)
BSC
TYP
RECOMMENDED SOLDER PAD LAYOUT
0.18
(.007)
MSOP (MS) 0603
SEATING
PLANE
0.17 – 0.27
(.007 – .011)
TYP
0.50
(.0197)
BSC
0.127 ± 0.076
(.005 ± .003)
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
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
7
8
.004 – .010
(0.101 – 0.254)
.053 – .069
(1.346 – 1.752)
.045 ±.005
5
6
.050 BSC
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
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)
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN
.160 ±.005
SO8 0303
1
3
2
.030 ±.005
TYP
4
RECOMMENDED SOLDER PAD LAYOUT
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.015 ± .004
× 45°
(0.38 ± 0.10)
.007 – .0098
(0.178 – 0.249)
.0532 – .0688
(1.35 – 1.75)
.004 – .0098
(0.102 – 0.249)
.189 – .196*
(4.801 – 4.978)
.045 ±.005
0° – 8° TYP
16 15 14 13 12 11 10 9
.016 – .050
(0.406 – 1.270)
.009
(0.229)
REF
.0250
(0.635)
BSC
.008 – .012
(0.203 – 0.305)
TYP
.254 MIN
NOTE:
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
.229 – .244
(5.817 – 6.198)
.0165 ± .0015
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
.150 – .165
.150 – .157**
(3.810 – 3.988)
.0250 BSC
RECOMMENDED SOLDER PAD LAYOUT
1
2 3
4
5 6
7
GN16 (SSOP) 0204
8
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
(8.560 – 8.738)
NOTE 3
.045 ±.005
.050 BSC
14
N
12
11
10
9
8
N
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
1
.030 ±.005
TYP
13
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
2
3
4
5
6
7
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.014 – .019
(0.355 – 0.483)
TYP
.050
(1.270)
BSC
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)
S14 0502
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC2051/LTC2052
U
TYPICAL APPLICATIO
Paralleling Amplifiers to Improve Noise
R2
R1
2
–
1/4 LTC2052
3
1
R
+
R
5V
R2
R1
VIN
6
0.1μF
–
1/4 LTC2052
5
7
R
13
+
–
4
1/4 LTC2052
12
+
14
VOUT
11
R2
0.1μF
R1
9
1/4 LTC2052
10
–5V
–
8
R
+
VOUT
R2
NOISE OF EACH PARALLEL OP AMP
=3
; INPUT DC – 10Hz NOISE ≅ 0.8μVP-P =
R1
VIN
√3
20512 F02
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1051/LTC1053 Precision Zero-Drift Op Amp
Dual/Quad
LTC1151
±15V Zero-Drift Op Amp
Dual High Voltage Operation ±18V
LTC1152
Rail-to-Rail Input and Output Zero-Drift Op Amp
Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown
LTC2050
Zero-Drift Op Amp in SOT-23
Single Supply Operation 2.7V to ±5V, Shutdown
LTC2053
Zero-Drift Precision Instrumentation Amp
MS8, 116dB CMRR, Two External Resistors Set Gain
LTC6800
Rail-to-Rail Input and Output Instrumentation Amp
Low Cost, MS8, Two External Resistors Set Gain
20512fd
12
Linear Technology Corporation
LT 0108 REV D • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2000
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