INA128HD

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℃ to 210℃ temperature range. The INA128-HT is available in an 8-pin SOIC-8 surface-mount package, specified for the -55℃ to 175℃ temperature range.

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℃ to 210℃)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability

Key features

• Low Offset Voltage: 25 μV Typical
• Low Input Bias Current: 50 nA Typical
• 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