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PDF ADA4638-1 Data sheet ( Hoja de datos )
| Número de pieza | ADA4638-1 | |
| Descripción | Rail-to-Rail Output Precision Amplifier | |
| Fabricantes | Analog Devices | |
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Data Sheet
30 V Zero-Drift, Rail-to-Rail Output
Precision Amplifier
ADA4638-1
FEATURES
Single supply operation: 4.5 V to 30 V
Dual supply operation: ±2.25 V to ±15 V
Low offset voltage: 4 μV maximum
Input offset voltage drift: 0.05 μV/°C maximum
High gain: 130 dB minimum
High PSRR: 120 dB minimum
High CMRR: 130 dB minimum
Input common-mode range includes lower supply rail
Rail-to-rail output
Low supply current: 0.95 mA maximum
APPLICATIONS
Electronic weigh scale
Pressure and position sensors
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
GENERAL DESCRIPTION
The ADA4638-1 is a high voltage, high precision, zero-drift
amplifier featuring rail-to-rail output swing. It is guaranteed to
operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V
dual supplies while consuming less than 0.95 mA of supply
current at ±5 V.
With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C,
no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz
to 10 Hz), the ADA4638-1 is suited for high precision applications
where large error sources cannot be tolerated. Pressure sensors,
medical equipment, and strain gage amplifiers benefit greatly
from nearly zero drift over the wide operating temperature
range. Many applications can take advantage of the rail-to-rail
output swing provided by the ADA4638-1 to maximize the signal-
to-noise ratio (SNR).
The ADA4638-1 is specified for the extended industrial (−40°C
to +125°C) temperature range and is available in 8-lead LFCSP
(3 mm × 3 mm) and SOIC packages.
PIN CONFIGURATIONS
ADA4638-1
NC 1
–IN 2
+IN 3
V– 4
TOP VIEW
(Not to Scale)
8 NC
7 V+
6 OUT
5 NC
NOTES
1. NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
Figure 1. 8-Lead SOIC
ADA4638-1
NC 1
–IN 2
+IN 3
V– 4
TOP VIEW
(Not to Scale)
8 NC
7 V+
6 OUT
5 NC
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE
CONNECTED TO V–.
Figure 2. 8-Lead LFCSP
Table 1. Analog Devices, Inc., Zero-Drift Op Amp Portfolio
www.DataSheet.co.kr
Operating
Voltage
Type
Product
Offset
Voltage
(μV) Max
Offset
Voltage Drift
(μV/°C) Max
30 V Single ADA4638-1 4.5
0.08
16 V
Single AD8638
9
0.06
Dual AD8639
9
0.06
5V
Single ADA4528-1 2.5
0.015
AD8628
5
0.02
AD8538
13
0.1
ADA4051-1 15
0.1
Dual AD8629
5
0.02
AD8539
13
0.1
ADA4051-2 15
0.1
Quad AD8630
5
0.02
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
Data Sheet
ADA4638-1
ELECTRICAL CHARACTERISTICS—5 V OPERATION
VS = 5 V, VCM = VSY/2 V, TA = 25°C, unless otherwise specified.
Table 4.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
VOS
Offset Voltage Drift
ΔVOS/ΔT
Input Bias Current
IB
Input Offset Current
IOS
Input Voltage Range
Common-Mode Rejection Ratio
CMRR
Open-Loop Gain
AVO
Input Resistance, Common Mode
Input Capacitance, Differential Mode
Input Capacitance, Common Mode
OUTPUT CHARACTERISTICS
Output Voltage High
RINCM
CINDM
CINCM
VOH
Output Voltage Low
VOL
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Settling Time to 0.1%
Unity-Gain Crossover
Phase Margin
Gain Bandwidth Product
−3 dB Closed-Loop Bandwidth
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
ISC
ZOUT
PSRR
ISY
SR
tS
UGC
ΦM
GBP
f−3dB
en p-p
en
in
Test Conditions/Comments
−40°C ≤ TA ≤ +125°C; SOIC
−40°C ≤ TA ≤ +125°C; LFCSP
−40°C ≤ TA ≤ +125°C; SOIC
−40°C ≤ TA ≤ +125°C; LFCSP
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
VCM = 0 V to 3 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ, VO = 0.5 V to +4.5 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to VCM
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to VCM
www.DataSheet.co.kr
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to VCM
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to VCM
−40°C ≤ TA ≤ +125°C
f = 1 MHz, AV = +1
VS = 4.5 V to 30 V
−40°C ≤ TA ≤ +125°C
IO = 0 mA
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ, CL = 20 pF, AV = +1
RL = 10 kΩ, CL = 20 pF, AV = −100
VIN = 1 V step, RL = 10 kΩ, CL = 20 pF, AV = −1
VIN = 20 mV p-p, RL = 10 kΩ, CL = 20 pF, AV = +1
VIN = 20 mV p-p, RL = 10 kΩ, CL = 20 pF, AV = +1
VIN = 20 mV p-p, RL = 10 kΩ, CL = 20 pF, AV = +100
VIN = 20 mV p-p, RL = 10 kΩ, CL = 20 pF, AV = +1
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
Min Typ Max
1
30
60
0
118 140
118
125 150
125
75
4
9
13
18
21
0.05
0.08
90
230
170
200
3
4.98 4.984
4.97
4.90 4.92
4.87
7.5 10
15
37 45
70
±22
340
120 143
120
0.8
0.95
1.15
1.5
22
3
1.0
64
1.3
1.8
1.2
70
0.015
Unit
μV
μV
μV
μV/°C
μV/°C
pA
pA
pA
pA
V
dB
dB
dB
dB
GΩ
pF
pF
V
V
V
V
mV
mV
mV
mV
mA
Ω
dB
dB
mA
mA
V/μs
μs
μs
MHz
Degrees
MHz
MHz
μV p-p
nV/√Hz
pA/√Hz
Rev. 0 | Page 5 of 24
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
Data Sheet
60
50
40
30
20
10
0
–10
–20
–30
–40
10
AV = +100
AV = +10
AV = +1
VSY = ±2.5V
RL = 10kΩ
100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 27. Closed-Loop Gain vs. Frequency
10M
120
VSY = ±2.5V
VCM = VSY/2
100
80
60
40
20
0
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 28. CMRR vs. Frequency
140
120
100
80
60
40
20
0
–20
100
VSY = ±2.5V
VCM = VSY/2
PSRR+
PSRR–
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 29. PSRR vs. Frequency
10M
ADA4638-1
60
50
40
30
20
10
0
–10
–20
–30
–40
10
AV = +100
AV = +10
AV = +1
VSY = ±15V
RL = 10kΩ
100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 30. Closed-Loop Gain vs. Frequency
10M
120
VSY = ±15V
VCM = VSY/2
100
80
60
40
www.DataSheet.co.kr
20
0
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 31. CMRR vs. Frequency
140
120
100
80
60
40
20
0
–20
100
VSY = ±15V
VCM = VSY/2
PSRR+
PSRR–
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 32. PSRR vs. Frequency
10M
Rev. 0 | Page 11 of 24
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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