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부품번호 AD8629S 기능
기능 Single-Supply Rail-to-Rail Input/Output Operational Amplifier
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AD8629S 데이터시트, 핀배열, 회로
Zero-Drift, Single-SupplwywwR.DaataiSlhe-ett4oU.c-oRm ail
Input/Output Operational Amplifier
AD8629S
1.0 Scope
1.1. This specification documents the detail requirements for space qualified product manufactured on Analog
Devices, Inc.'s QML certified line per MIL-PRF-38535 Level V except as modified herein.
1.2. The manufacturing flow described in the STANDARD SPACE LEVEL PRODUCTS PROGRAM brochure is to
be considered a part of this specification. http://www.analog.com/aeroinfo
1.3. This data specifically details the space grade version of this product. A more detailed operational description
and a complete data sheet for commercial product grades can be found at http://www.analog.com/AD8629
2.0 Part Number
2.1. The complete part number(s) of this specification follows:
Specific Part Number
Description
AD8629D703L
Dual, Zero Drift, Single-Supply, Rail-to-Rail I/O, Operational Amplifier.
Radiation tested to 10Krads (Si)
3.0 Case Outline
3.1. The case outline(s) are as designated in MIL-STD-1835 and as follows:
Outline Letter Descriptive Designator Terminals
Package style
L
GDFP1-F10
10 lead
Ceramic flatpack (CERPAK)
Pin Number
1
2
3
4
5
6
7
8
9
10
Terminal
Symbol
OUT A
-IN A
NC
+IN A
-Vs
+IN B
-IN B
NC
OUT B
+Vs
Package: L
Pin Type
Pin Description
Analog output
Operational amplifier output, Amp-A
Analog input
Operational amplifier negative input, Amp-A
NC Not connected
Analog input
Operational amplifier positive input, Amp-A
power
Negative power supply
Analog input
Operational amplifier positive input, Amp-B
Analog input
Operational amplifier negative input, Amp-B
NC Not connected
Analog output
Operational amplifier output, Amp-B
power
Positive power supply
Figure 1 – Terminal Connections
ASD0016529
Rev. C
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. Trademarks and registered trademarks are the property of
their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2010 Analog Devices, Inc. All rights reserved.




AD8629S pdf, 반도체, 판매, 대치품
AD8629S
www.DataSheet4U.com
TABLE IA – ELECTRICAL PERFORMANCE CHARACTERISTICS (Vs = 5.0V) – Cont.
POWER SUPPLY
Power Supply Rejection Ratio PSRR
Vs = 2.7V to 5.5V
1,2,3 115
M,D 1 115
Total Supply Current
(Both Amps)
ISY VO = VS/2
1
2,3
M,D 1
2.2
2.4
2.2
DYNAMIC PERFORMANCE
Gain Bandwidth Product
GBP 2/ 3/
4 2.5
dB
dB
mA
mA
mA
MHz
TABLE IA NOTES:
1/ +VS = 5.0V, -Vs=GND, VCM = 2.5V, TA nom = 25ºC, TA max = 125ºC, TA min = -55ºC unless otherwise noted
2/ Guaranteed by characterization analysis – not production tested. Characterization will be repeated in conjunction with any major design changes.
3/ Parameter is not tested post irradiation
TABLE IB – ELECTRICAL PERFORMANCE CHARACTERISTICS (Vs = 2.7V)
Parameter
See notes at end of table
INPUT CHARACTERISTICS
Offset Voltage
Symbol
VOS
Conditions 1/
Unless otherwise specified
Sub-Group
Limit
Min
1 -10
2,3 -15
M,D 1 -10
Limit
Max
10
15
10
Units
µV
µV
µV
Input Bias Current
IB
1 -500 500
pA
2,3 -1.5 1.5
nA
M,D
1 -500 500
pA
Input Offset Current
IOS
1 -400 400
pA
2,3 -500 500
pA
M,D
1 -400 400
pA
Input Voltage Range
IVR
1,2,3 0
2.7
V
M,D
1 0 2.7
V
Common-Mode
Rejection Ratio
CMRR VCM = 0 to 2.7V
M,D
1 115
2,3 110
1 115
dB
dB
dB
Large Signal Voltage Gain
AVO RL = 10 k, VO = 0.3V to 2.4V
M,D
1 110
2,3 105
1 110
dB
dB
dB
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
VOS/T 3/
VOH RL = 100 kto ground
M,D
2,3 0.06 µV/°C
1 2.68
2,3 2.68
1 2.68
V
V
V
RL = 10 kto ground
M,D
1 2.67
2,3 2.67
1 2.67
V
V
V
ASD0016529 Rev. C | Page 4 of 8

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AD8629S 전자부품, 판매, 대치품
AD8629Swww.DataSheet4U.com
7.0 Application Notes
7.1. Functional Description
The AD8629 is a single-supply, ultrahigh precision rail-to-rail input and output operational amplifier. The
typical offset voltage of less than 1 μV allows this amplifier to be easily configured for high gains without risk
of excessive output voltage errors. The extremely small temperature drift ensures a minimum offset voltage
error over their entire temperature range of −55°C to +125°C, making this amplifier ideal for a variety of
sensitive measurement applications in harsh operating environments.
The AD8629 achieves a high degree of precision through a patented combination of auto-zeroing and
chopping. This unique topology allows the AD8629 to maintain its low offset voltage over a wide temperature
range. The AD8629 also optimizes the noise and bandwidth over previous generations of auto-zero
amplifiers, offering the lowest voltage noise of any auto-zero amplifier by more than 50%.
Previous designs used either auto-zeroing or chopping to add precision to the specifications of an amplifier.
Auto-zeroing results in low noise energy at the auto-zeroing frequency, at the expense of higher low
frequency noise due to aliasing of wideband noise into the auto-zeroed frequency band. Chopping results in
lower low frequency noise at the expense of larger noise energy at the chopping frequency. The AD8629 uses
both auto-zeroing and chopping in a patented ping-pong arrangement to obtain lower low frequency noise
together with lower energy at the chopping and auto-zeroing frequencies, maximizing the signal-to-noise ratio
for the majority of applications without the need for additional filtering. The relatively high clock frequency of
15 kHz simplifies filter requirements for a wide, useful noise-free bandwidth.
The AD8629 has low noise over a relatively wide bandwidth (0 Hz to 10 kHz) and can be used where the
highest dc precision is required. In systems with signal bandwidths of from 5 kHz to 10 kHz, the AD8629
provides true 16-bit accuracy, making it the best choice for very high resolution systems.
7.2. Input Overvoltage Protection
Although the AD8629 are rail-to-rail input amplifiers, care should be taken to ensure that the potential
difference between the inputs does not exceed the supply voltage. Under normal negative feedback operating
conditions, the amplifier corrects its output to ensure that the two inputs are at the same voltage. However, if
either input exceeds either supply rail by more than 0.3 V, large currents begin to flow through the ESD
protection diodes in the amplifier.
These diodes are connected between the inputs and each supply rail to protect the input transistors against
an electrostatic discharge event, and they are normally reverse-biased. However, if the input voltage exceeds
the supply voltage, these ESD diodes can become forward-biased. Without current limiting, excessive
amounts of current could flow through these diodes, causing permanent damage to the device. If inputs are
subject to overvoltage, appropriate series resistors should be inserted to limit the diode current to less than 5
mA maximum.
7.3. Output Phase Reversal
Output phase reversal occurs in some amplifiers when the input common-mode voltage range is exceeded.
As common-mode voltage is moved outside the common-mode range, the outputs of these amplifiers can
suddenly jump in the opposite direction to the supply rail. This is the result of the differential input pair shutting
down, causing a radical shifting of internal voltages that result in the erratic output behavior.
The AD8629 amplifiers have been carefully designed to prevent any output phase reversal, provided that both
inputs are maintained within the supply voltages. If one or both inputs could exceed either supply voltage, a
resistor should be placed in series with the input to limit the current to less than 5 mA. This ensures that the
output does not reverse its phase.
7.4. Overload Recovery Time
Many auto-zero amplifiers are plagued by a long overload recovery time, often in ms, due to the complicated
settling behavior of the internal nulling loops after saturation of the outputs. The AD8629 has been designed
so that internal settling occurs within two clock cycles after output saturation occurs. This results in a much
shorter recovery time, less than 10 μs, when compared to other auto-zero amplifiers. The wide bandwidth of
the AD8629 enhances performance when the parts are used to drive loads that inject transients into the
outputs. This is a common situation when an amplifier is used to drive the input of switched capacitor ADCs.
ASD0016529 Rev. C | Page 7 of 8

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부품번호상세설명 및 기능제조사
AD8629

Rail-to-Rail Input/Output Operational Amplifier

Analog Devices
Analog Devices
AD8629S

Single-Supply Rail-to-Rail Input/Output Operational Amplifier

Analog Devices
Analog Devices

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