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INA128/INA129

更新时间： 2024-11-02 23:58:39
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10页 248K
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INA128. INA129 - Precision. Low Power INSTRUMENTATION AMPLIFIERS

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INA128/INA129 数据手册

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INA128  
®
INA129  
INA128  
INA129  
INA128  
INA129  
Precision, Low Power  
INSTRUMENTATION AMPLIFIERS  
DESCRIPTION  
FEATURES  
The INA128 and INA129 are low power, general  
purpose instrumentation amplifiers offering excellent  
accuracy. Their versatile 3-op amp design and small  
size make them ideal for a wide range of applications.  
Current-feedback input circuitry provides wide band-  
width even at high gain (200kHz at G = 100).  
● LOW OFFSET VOLTAGE: 50µV max  
● LOW DRIFT: 0.5µV/°C max  
● LOW INPUT BIAS CURRENT: 5nA max  
● HIGH CMR: 120dB min  
● INPUTS PROTECTED TO ±40V  
● WIDE SUPPLY RANGE: ±2.25 to ±18V  
● LOW QUIESCENT CURRENT: 700µA  
● 8-PIN PLASTIC DIP, SO-8  
A single external resistor sets any gain from 1 to  
10,000. INA128 provides an industry standard gain  
equation; INA129’s gain equation is compatible with  
the AD620.  
The INA128/INA129 is laser trimmed for very low  
offset voltage (50µV), drift (0.5µV/°C) and high com-  
mon-mode rejection (120dB at G ≥ 100). It operates  
with power supplies as low as ±2.25V, and quiescent  
current is only 700µA—ideal for battery operated  
systems. Internal input protection can withstand up to  
±40V without damage.  
APPLICATIONS  
● BRIDGE AMPLIFIER  
● THERMOCOUPLE AMPLIFIER  
● RTD SENSOR AMPLIFIER  
● MEDICAL INSTRUMENTATION  
● DATA ACQUISITION  
The INA128/INA129 is available in 8-pin plastic  
DIP, and SO-8 surface-mount packages, specified for  
the –40°C to +85°C temperature range. The INA128  
is also available in dual configuration, the INA2128.  
V+  
7
INA128:  
INA128, INA129  
50kΩ  
RG  
G = 1 +  
–
VIN  
2
1
Over-Voltage  
Protection  
A1  
25kΩ(1)  
INA129:  
40kΩ  
40kΩ  
49.4kΩ  
RG  
G = 1 +  
6
5
A3  
VO  
RG  
8
3
25kΩ(1)  
A2  
Ref  
+
VIN  
Over-Voltage  
Protection  
40kΩ  
40kΩ  
4
NOTE: (1) INA129: 24.7kΩ  
V–  
International Airport Industrial Park  
•
Mailing Address: PO Box 11400, Tucson, AZ 85734  
FAXLine: (800) 548-6133 (US/Canada Only)  
•
Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706  
•
Tel: (520) 746-1111 • Twx: 910-952-1111  
Internet: http://www.burr-brown.com/  
•
•
Cable: BBRCORP  
•
Telex: 066-6491  
•
FAX: (520) 889-1510  
•
Immediate Product Info: (800) 548-6132  
©1995 Burr-Brown Corporation  
PDS-1296C  
Printed in U.S.A. October, 1996  
1234567...10

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