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.
(1) Typical values for 210°C application.
(2) Custom temperature ranges available.
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| Status | ACTIVE |
| SubFamily | Instrumentation amplifiers |
| Number of channels | 1 |
| Vs | 4.5 |
| Input offset (+/-) | 250 |
| Gain | 10000 |
| Noise at 1 kHz | 8 |
| CMRR | 120 |
| Input offset drift (+/-) | 0.5 |
| Input bias current (+/-) | 5 |
| Iq | 0.7 |
| Bandwidth at min gain | 1.3 |
| Gain error (+/-) | 2.5 |
| Operating temperature range | -55 to +175 |
| Package Group | SOIC|8 |
| Approx. price | |
| Package size: mm2:W x L (PKG) | [pf]8SOIC[/pf]: 29 mm2: 6 x 4.9 (SOIC|8) |
| Noise at 0.1 Hz-10 Hz | 0.2 |
| Gain non-linearity (+/-) | 0.012 |
| Rating | High Temp |