# AD589: 2-Terminal IC 1.2V Reference

## Features

- Superior replacement for other 1.2V references
- Wide operating range: 50µA to 5mA
- Low power: 60µW total PD at 50µA
- Low temperature coefficient: 10 ppm/°C max (AD589M)
- 2-terminal Zener operation
- Low output impedance: 0.6 Ω
- No frequency compensation required
- Low cost
- MIL-STD-883 compliant versions available

## Product Description

- 2-terminal, low-cost, temperature-compensated band gap voltage reference
- Provides fixed 1.23V output voltage for input currents between 50µA and 5mA
- Output impedance 10x lower than typical Zener diodes

## Product Highlights

- Delivers a constant reference voltage over a wide range of input current
- Stable output voltage due to low dynamic output impedance and temperature coefficients
- Can be operated as positive or negative reference
- Operates at a total current as low as 50µA
- Exact replacement for other 1.2V references, offering superior temperature performance.

## Packages & Models

- **Metal Can (H-02):** AD589J, AD589K, AD589L, AD589M, AD589S, AD589T.
- **SOIC (R-8):** AD589J, AD589JR (lead-free option: AD589JRZ)
- Chip form available (AD589JCHIPS, AD589TCHIPS)

## Specifications (Typical @ IIN = 500µA, TA = 25°C)

- Output Voltage: 1.200 - 1.250 V (varies by model)
- Output Voltage Change vs.
Current: 5mV (max)
- Dynamic Output Impedance: 0.6 Ω
- RMS Noise Voltage (10Hz < f < 10kHz): 5µV
- Temperature Coefficient: 10 - 100 ppm/°C (varies by model)
- Turn-on Settling Time: 25µs
- Operating Current: 50µA
- Operating Temperature: 0°C to 70°C (some models -55°C to +125°C)

## Absolute Maximum Ratings

- Current: 10mA
- Reverse Current: 10mA
- Power Dissipation: 125mW
- Storage Temperature: -65°C to +175°C
- Operating Junction Temperature Range: -55°C to +150°C