| Number of channels (#) | 1 |
| Vs (Max) (V) | 36 |
| Vs (Min) (V) | 4.5 |
| Input offset (+/-) (Max) (uV) | 125 |
| Gain (Min) (V/V) | 1 |
| Gain (Max) (V/V) | 10000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) | 8 |
| Features | Current Feedback, Overvoltage Protection |
| CMRR (Min) (dB) | 113 |
| Input offset drift (+/-) (Max) (uV/C) | 1 |
| Input bias current (+/-) (Max) (nA) | 10 |
| Iq (Typ) (mA) | 0.7 |
| Bandwidth at min gain (Typ) (MHz) | 1.3 |
| Gain error (+/-) (Max) (%) | 0.7 |
| Operating temperature range (C) | -55 to 175 |
| Type | Resistor |
| Output swing headroom (to negative supply) (Typ) (V) | 0.8 |
| Output swing headroom (to positive supply) (Typ) (V) | -0.9 |
| Input common mode headroom (to negative supply) (Typ) (V) | 1.7 |
| Input common mode headroom (to positive supply) (Typ) (V) | -1.4 |
| Noise at 0.1 Hz-10 Hz (Typ) (uVpp) | 0.2 |
| Gain non-linearity (+/-) (Max) (%) | 0.002 |
- 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)
- 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.
All other trademarks are the property of their respective owners
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.
