Overview
The PGA204AU/1K is a programmable gain instrumentation amplifier produced by Texas Instruments. It is part of the PGA204 series, known for its high accuracy, low cost, and versatility. This amplifier offers digitally selectable gains, making it suitable for a wide range of applications. The PGA204AU/1K operates with low offset voltage, drift, and high common-mode rejection, ensuring precise signal amplification.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage | TA = +25°C, VS = ±15V | ±10 + 20/G | ±50 + 100/G | ±125 + 500/G | µV |
| Offset Voltage Drift | TA = TMIN to TMAX | ±0.1 + 0.5/G | ±0.25 + 5/G | ±1 + 10/G | µV/°C |
| Input Bias Current | TA = +25°C, VS = ±15V | 2 | nA | ||
| Quiescent Current | VIN = 0V | 5.2 | 7.5 | mA | |
| Power Supply Voltage | ±4.5 | ±15 | ±18 | V | |
| Temperature Range | –40 | +85 | °C | ||
| Common-Mode Rejection | VCM = ±10V, ∆RS = 1kΩ | 115 | dB | ||
| Gain Options | 1, 10, 100, 1000 | V/V |
Key Features
- Digitally programmable gain: Gains of 1, 10, 100, and 1000 V/V for the PGA204 series.
- Low offset voltage: Maximum of 50µV.
- Low offset voltage drift: 0.25µV/°C.
- Low input bias current: 2nA maximum.
- Low quiescent current: 5.2mA typical.
- No logic supply required.
- Internal input protection up to ±40V.
- Available in 16-pin plastic DIP and SOL-16 surface-mount packages.
- Operates with power supplies as low as ±4.5V, suitable for battery-operated systems.
Applications
- Data acquisition systems.
- General-purpose analog boards.
- Medical instrumentation.
- Thermocouple and microphone/hydrophone applications.
Q & A
- What are the gain options for the PGA204AU/1K?
The PGA204AU/1K offers gain options of 1, 10, 100, and 1000 V/V.
- What is the maximum input offset voltage for the PGA204AU/1K?
The maximum input offset voltage is 50µV.
- How does the offset voltage drift with temperature?
The offset voltage drifts by 0.25µV/°C.
- What is the typical quiescent current of the PGA204AU/1K?
The typical quiescent current is 5.2mA.
- What is the minimum power supply voltage required for the PGA204AU/1K?
The minimum power supply voltage is ±4.5V.
- What types of packages are available for the PGA204AU/1K?
The PGA204AU/1K is available in 16-pin plastic DIP and SOL-16 surface-mount packages.
- What is the temperature range for the PGA204AU/1K?
The operating temperature range is –40°C to +85°C.
- Does the PGA204AU/1K require a separate logic supply?
No, it does not require a separate logic supply.
- What is the common-mode rejection ratio (CMRR) of the PGA204AU/1K?
The CMRR is 115dB at a gain of 1000.
- How is the gain selected for the PGA204AU/1K?
The gain is selected using two TTL or CMOS-compatible address lines, A0 and A1.
