INA129-EP_15 Datasheet, PDF (1/26 Pages) Texas Instruments – Precision, Low Power Instrumentation Amplifiers

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INA129-EP
SBOS508A – DECEMBER 2009 – REVISED DECEMBER 2015
INA129-EP Precision, Low Power Instrumentation Amplifiers
1 Features
•1 Low Offset Voltage
• Low Input Bias Current
• High CMR: 95 dB (Typical)
• Inputs Protected to ±40 V
• Wide Supply Range: ±2.25 V to ±18 V
• Low Quiescent Current: 2 mA (Typical)
2 Applications
• Bridge Amplifier
• Thermocouple Amplifier
• RTD Sensor Amplifier
• Medical Instrumentation
• Data Acquisition
• Supports Extreme Temperature Applications:
– Controlled Baseline
– One Assembly and Test Site
– One Fabrication Site
– Available in Military (–55°C to +125°C)
Temperature Range ⁽¹⁾
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
(1) Custom temperature ranges available
3 Description
The INA129-EP device is a low power, general-
purpose instrumentation amplifier offering excellent
accuracy. The versatile 3-op amp design and small
size make the device ideal for a wide range of
applications. Current-feedback input circuitry provides
wide bandwidth even at high gain (200 kHz at G =
100).
A single external resistor sets any gain from 1 to
10,000. The INA129-EP provides an industry-
standard gain equation; the INA129-EP gain equation
is compatible with the AD620.
The INA129-EP device is laser trimmed for very low
offset voltage, drift, and high common-mode rejection
(113 dB at G ≥ 100). It operates with power supplies
as low as ±2.25 V, and quiescent current is only 750
μA–ideal for battery operated systems. Internal input
protection can withstand up to ±40 V without damage.
The INA129-EP is available in a 8-Pin SOIC surface-
mount package specified for the –55°C to 125°C
temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA129-EP
SOIC (8)
4.90 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_I^-_N
2 _Over-Voltage
Protection
1
R_G
8
+
3 _Over-Voltage
V_IN
Protection
Simplified Schematic
V+
7
INA129
G = 1 + ^{49.4 kW}
R_G
A₁
24.7 kW
40 kW
24.7 kW
A₂
40 kW
40 kW
A₃
6
V_O
40 kW
5
Ref
4
V-
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.