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PDF LTC2057 Data sheet ( Hoja de datos )
| Número de pieza | LTC2057 | |
| Descripción | Low Noise Zero-Drift Operational Amplifier | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LTC2057/LTC2057HV
High Voltage, Low Noise
Zero-Drift Operational Amplifier
Features
n Supply Voltage Range
n 4.75V to 36V (LTC2057)
n 4.75V to 60V (LTC2057HV)
n Offset Voltage: 4μV (Maximum)
n Offset Voltage Drift: 0.015μV/°C
(Maximum, –40°C to 125°C)
n Input Noise Voltage
n 200nVP-P, DC to 10Hz (Typ)
n 11nV/√Hz, 1kHz (Typ)
n Input Common Mode Range: V– – 0.1V to V+ – 1.5V
n Rail-to-Rail Output
n Unity Gain Stable
n Gain Bandwidth Product: 1.5MHz (Typ)
n Slew Rate: 0.45V/μs (Typ)
n
n
APSVORLR: :115600ddBB(T(Typyp) )
n CMRR: 150dB (Typ)
n Shutdown Mode
Applications
n High Resolution Data Acquisition
n Reference Buffering
n Test and Measurement
n Electronic Scales
n Thermocouple Amplifiers
n Strain Gauges
n Low-Side Current Sense
n Automotive Monitors and Control
Description
The LTC®2057 is a high voltage, low noise, zero-drift op-
erational amplifier that offers precision DC performance
over a wide supply range of 4.75V to 36V or 4.75V to
60V for the LTC2057HV. Offset voltage and 1/f noise are
suppressed, allowing this amplifier to achieve a maximum
offset voltage of 4μV and a DC to 10Hz input noise volt-
age of 200nVP-P (typ). The LTC2057’s self-calibrating
circuitry results in low offset voltage drift with temperature,
0.015μV/°C (max), and zero-drift over time. The amplifier
also features an excellent power supply rejection ratio
(PSRR) of 160dB and a common mode rejection ratio
(CMRR) of 150dB (typ).
The LTC2057 provides rail-to-rail output swing and an
input common mode range that includes the V– rail (V– –
0.1V to V+ – 1.5V). In addition to low offset and noise, this
amplifier features a 1.5MHz (typ) gain-bandwidth product
and a 0.45V/μs (typ) slew rate.
Wide supply range, combined with low noise, low offset,
and excellent PSRR and CMRR make the LTC2057 andhttp://www.DataSheet4U.net/
LTC2057HV well suited for high dynamic-range test,
measurement, and instrumentation systems.
L, LT, LTC, LTM, Linear Technology, Over-The-Top, and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
Wide Input Range Precision Gain-of-100 Instrumentation Amplifier
30V
–IN +
LTC2057HV
–
18V
–30V 11.5k
232Ω
11.5k
30V
8
9
10
M9
M3
M1
1
2
3
P1
P3
P9
7
VCC
LT1991A OUT
REF
VEE 5
4
6
VOUT
–
LTC2057HV
–18V
2057 TA01a
+IN +
INPUT CM RANGE = ±28V WITH 4V OF OUTPUT SWING
CMRR = 130dB (TYP), INPUT OFFSET VOLTAGE = 1µV (TYP)
–30V
Input Offset Voltage
vs Supply Voltage
5 5 TYPICAL UNITS
4 VCM = VS/2
3 TA = 25°C
2
1
0
–1
–2
–3
–4
–5
0
5 10 15 20 25 30 35 40 45 50 55 60 65
VS (V)
2057 TA01b
For more information www.linear.com/LTC2057
2057f
1
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1 page  
LTC2057/LTC2057HV
E lectrical Characteristics (LTC2057/LTC2057HV) The l denotes the specifications which apply
over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VS = ±15V; VCM = VOUT = 0V.
SYMBOL PARAMETER
CONDITIONS
MIN TYP
MAX
VOS
∆VOS/∆T
IB
Input Offset Voltage (Note 3)
Average Input Offset Voltage Drift (Note 3)
Input Bias Current (Note 4)
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
0.5 4.5
l 0.015
30 200
l 360
l 6.0
IOS Input Offset Current (Note 4)
–40°C to 85°C
–40°C to 125°C
60 400
l 480
l 1.5
in
en
en P-P
CIN
Input Noise Current Spectral Density
Input Noise Voltage Spectral Density
Input Noise Voltage
Differential Input Capacitance
Common Mode Input Capacitance
1kHz
1kHz
DC to 10Hz
150
12
210
3
3
CMRR
Common Mode Rejection Ratio (Note 5)
V–4C0M°=C
V–
to
– 0.1V
125°C
to
V+
–
1.5V
128
l 126
150
PSRR
Power Supply Rejection Ratio (Note 5)
VS = 4.75V to 36V
–40°C to 125°C
133
l 129
160
AVOL Open Loop Voltage Gain (Note 5)
VOUT = V– +0.25V to V+ –0.25V, RL =10kΩ
–40°C to 125°C
l
130
128
150
VOL – V– Output Voltage Swing Low
No Load
–40°C to 125°C
I–S4IN0K°C=
1mA
to 125°C
ISINK = 5mA
–40°C to 85°C
–40°C to 125°C
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2 12
l 45
35 60
l 100
175 255
l 360
l 435
V+ – VOH Output Voltage Swing High
No Load
–40°C to 125°C
ISOURCE = 1mA
–40°C to 125°C
ISOURCE = 5mA
–40°C to 85°C
–40°C to 125°C
3 15
l 45
50 75
l 125
235 335
l 465
l 560
ISC
SRRISE
SRFALL
GBW
Short Circuit Current
Rising Slew Rate
Falling Slew Rate
Gain Bandwidth Product
AV = –1, RL = 10kΩ
AV = –1, RL = 10kΩ
19 30
1.3
0.45
1.5
fC Internal Chopping Frequency
IS Supply Current
No Load
–40°C to 85°C
–40°C to 125°C
100
0.88 1.35
l 1.65
l 1.83
In Shutdown Mode
–40°C to 85°C
–40°C to 125°C
3
l8
l9
VSDL Shutdown Threshold (SD – SDCOM) Low –40°C to 125°C
VSDH Shutdown Threshold (SD – SDCOM) High –40°C to 125°C
SDCOM Voltage Range
–40°C to 125°C
l
l2
l V–
0.8
V+ –2V
ISD
ISDCOM
SD Pin Current
SDCOM Pin Current
–40°C to 125°C, VSD – VSDCOM = 0
–40°C to 125°C, VSD – VSDCOM = 0
l –2.0
l
–0.5
0.5
2
UNITS
μV
μV/°C
pA
pA
nA
pA
pA
nA
fA/√Hz
nV/√Hz
nVP-P
pF
pF
dB
dB
dB
dB
dB
dB
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
V/μs
V/μs
MHz
kHz
mA
mA
mA
μA
μA
μA
V
V
V
µA
µA
For more information www.linear.com/LTC2057
2057f
5
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5 Page 
LTC2057/LTC2057HV
Typical Performance Characteristics
Shutdown Transient
with Sinusoid Input
4
3
VS = ±2.5V, AV = +1
SD – SDCOM
2 ISS
1
VIN
VOUT
0
0.4
0.3
0.2
0.1
0
–0.1
–10 0
10 20 30
TIME (µs)
–0.2
40 50
2057 G25
Start-Up Transient
with Sinusoid Input
4
3
2
1
0
VS = ±2.5V
AV = +1
–10 0 10
20 30 40
TIME (µs)
SD – SDCOM 0.4
ISS
VIN
0.3
VOUT
0.2
0.1
0.1
–0.1
–0.2
–0.3
50 60 70
2057 G27
Shutdown Transient
with Sinusoid Input
4
3
VS = ±30V, AV = +1
SD – SDCOM
2 ISS
1
0
VIN
VOUT
0.4
0.3
0.2
0.1
0
–0.1
–10 0
10 20 30
TIME (µs)
–0.2
40 50
2057 G26
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Start-Up Transient
with Sinusoid Input
4
3
2
1
0
SD – SDCOM
ISS
VIN
VOUT
–10 0 10 20 30 40
TIME (µs)
0.4
0.3
0.2
0.1
0
–0.1
VS = ±30V
AV = +1
–0.2
–0.3
50 60 70
2057 G28
Closed Loop Output Impedance
vs Frequency
1000 VS = ±2.5V
100
AV = +100
10
1 AV = +10
0.1 AV = +1
0.01
100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
2057 G29
Closed Loop Output Impedance
vs Frequency
1000 VS = ±30V
100
10
AV = +100
1
AV = +10
0.1 AV = +1
0.01
100
1k 10k 100k 1M 10M
FREQUENCY (Hz)
2057 G30
THD+N vs Amplitude
0.1
0.01
0.001 fIN = 1kHz
VS = ±15V
AV = +1
RL = 10kΩ
BW = 80kHz
0.0001
0.01 0.1
1
OUTPUT AMPLITUDE (VRMS)
10
2057 G31
For more information www.linear.com/LTC2057
2057f
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC2057.PDF ] | |
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