INA128-HT Datasheet, PDF (1/30 Pages) Texas Instruments – PRECISION, LOW POWER INSTRUMENTATION AMPLIFIERS

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INA128-HT, INA129-HT
SBOS501F – JANUARY 2010 – REVISED FEBRUARY 2015
INA12x-HT Precision, Low-Power Instrumentation Amplifiers
1 Features
•1 Low Offset Voltage: 25 uV Typical
• Low Input Bias Current: 50 nA Typical ⁽¹⁾
• High CMR: 95 dB Typical⁽¹⁾
• Inputs Protected to ±40 V
• Wide Supply Range: ±2.25 V to ±18 V
• Low Quiescent Current: 2 mA Typical⁽¹⁾
2 Applications
• Bridge Amplifiers
• Thermocouple Amplifiers
• RTD Sensor Amplifiers
• Medical Instrumentation
• Data Acquisition
• Supports Extreme Temperature Applications:
– Controlled Baseline
– One Assembly/Test Site
– One Fabrication Site
– Available in Extreme Temperature Ranges
(–55°C to 210°C) ⁽²⁾
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
(1) Typical values for 210°C application.
(2) Custom temperature ranges available.
3 Description
The INA128-HT and INA129-HT are low-power,
general-purpose instrumentation amplifiers offering
excellent accuracy. The versatile three-operational-
amplifier design and small size make them ideal for a
wide range of applications. Current-feedback input
circuitry provides wide bandwidth even at high gain. A
single external resistor sets any gain from 1 to 10000.
The INA128-HT provides an industry-standard gain
equation; the INA129-HT gain equation is compatible
with the AD620.
The INA128-HT and INA129-HT are laser trimmed for
very low offset voltage (25 μV Typ) and high
common-mode rejection (93 dB at G ≥ 100). These
devices operate with power supplies as low as ±2.25
V, and quiescent current of 2 mA, typically. Internal
input protection can withstand up to ±40 V without
damage.
Texas Instruments' high-temperature products use
highly optimized silicon (die) solutions with design
and process enhancements to maximize performance
over extended temperatures.
The INA129-HT is available in 8-pin ceramic DIP and
8-pin ceramic surface-mount packages, specified for
the –55°C to 210°C temperature range. The INA128-
HT is available in an 8-pin SOIC-8 surface-mount
package, specified for the –55°C to 175°C
temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA128-HT
SOIC (8)
4.90 mm × 3.91 mm
INA129-HT
CFP (8)
CDIP SB (8)
6.90 mm × 5.65 mm
11.81 mm × 7.49 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
-
2 Over-Voltage
V_IN
Protection
1
R_G
8
+
3 Over-Voltage
V_IN
Protection
NOTE: (1) INA129: 24.7 kW
A₁
(1)
25 kW
(1)
25 kW
A₂
V+
7
INA128, INA129
40 kW
40 kW
INA128:
G = 1 + ^{50 kW}
R_G
INA129:
G = 1 + ^{49.4 kW}
R_G
6
A₃
V_O
40 kW
4
V-
40 kW
5
Ref
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.