Overview
The INA188ID is a precision instrumentation amplifier produced by Texas Instruments. It utilizes TI's proprietary auto-zeroing techniques to achieve low offset voltage, near-zero offset and gain drift, excellent linearity, and exceptionally low-noise density. This amplifier is designed to provide high common-mode rejection (greater than 104 dB for gains ≥ 10) and superior common-mode and supply rejection, making it ideal for high-resolution, precise measurement applications. The INA188ID operates with a wide supply range, supporting both single-supply (4 V to 36 V) and dual-supply (±2 V to ±18 V) configurations, and features a rail-to-rail output and high-impedance input range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Offset Voltage | ±55 µV (max) | µV |
| Input Offset Drift | 0.2 µV/°C (max) | µV/°C |
| Common-Mode Rejection Ratio (CMRR) | 104 dB, G ≥ 10 (min) | dB |
| Input Noise | 12 nV/√Hz at 1 kHz | nV/√Hz |
| Input Noise (0.1 Hz to 10 Hz) | 0.25 µV PP | µV PP |
| Supply Voltage (Single) | 4 V to 36 V | V |
| Supply Voltage (Dual) | ±2 V to ±18 V | V |
| Gain Range | 1 to 1000 | - |
| Gain Equation | G = 1 + (50 kΩ / R_G) | - |
| Input Voltage Range | (V–) + 0.1 V to (V+) – 1.5 V | V |
| Quiescent Current | 1.4 mA | mA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | SOIC-8, DFN-8 | - |
Key Features
- Excellent DC performance with low input offset voltage and drift.
- High common-mode rejection ratio (CMRR) of greater than 104 dB for gains ≥ 10.
- Low input noise: 12 nV/√Hz at 1 kHz and 0.25 µV PP (0.1 Hz to 10 Hz).
- Wide supply range: single supply from 4 V to 36 V and dual supply from ±2 V to ±18 V.
- Rail-to-rail output and high-impedance input range.
- Gain settable with a single external resistor using the industry-standard gain equation G = 1 + (50 kΩ / R_G).
- RFI-filtered inputs and low quiescent current of 1.4 mA.
- Operating temperature range of –40°C to +125°C.
Applications
- Bridge amplifiers.
- ECG amplifiers.
- Pressure sensors.
- Medical instrumentation.
- Portable instrumentation.
- Weigh scales.
- Thermocouple amplifiers.
- RTD sensor amplifiers.
- Data acquisition systems.
Q & A
- What is the input offset voltage of the INA188ID?
The input offset voltage of the INA188ID is ±55 µV (max).
- What is the common-mode rejection ratio (CMRR) of the INA188ID?
The CMRR of the INA188ID is greater than 104 dB for gains ≥ 10.
- What is the input noise of the INA188ID?
The input noise of the INA188ID is 12 nV/√Hz at 1 kHz and 0.25 µV PP (0.1 Hz to 10 Hz).
- What are the supply voltage ranges for the INA188ID?
The INA188ID can operate with a single supply from 4 V to 36 V and a dual supply from ±2 V to ±18 V.
- How is the gain set for the INA188ID?
The gain is settable with a single external resistor using the industry-standard gain equation G = 1 + (50 kΩ / R_G).
- What is the operating temperature range of the INA188ID?
The operating temperature range of the INA188ID is –40°C to +125°C.
- What are the typical applications of the INA188ID?
The INA188ID is typically used in bridge amplifiers, ECG amplifiers, pressure sensors, medical instrumentation, portable instrumentation, weigh scales, thermocouple amplifiers, RTD sensor amplifiers, and data acquisition systems.
- What is the quiescent current of the INA188ID?
The quiescent current of the INA188ID is 1.4 mA.
- What package types are available for the INA188ID?
The INA188ID is available in SOIC-8 and DFN-8 packages.
- Does the INA188ID have RFI-filtered inputs?
Yes, the INA188ID has RFI-filtered inputs.
