The AD630 is a high precision balanced modulator that combines a flexible commutating architecture with the accuracy and tem- perature stability afforded by laser wafer trimmed thin film resistors. Its signal processing applications include balanced modulation and demodulation, synchronous detection, phase detection, quadrature detection, phase-sensitive detection, lock-in amplification, and square wave multiplication. A network of on-board applications resistors provides precision closed-loop gains of ±1 and ±2 with 0.05% accuracy (AD630B). These resistors have high precision, low drift and low noise characteristics.
The AD630 is a high‑precision balanced modulator that combines a flexible commutating architecture with laser‑trimmed thin‑film resistors for excellent accuracy and temperature stability. It supports balanced modulation/demodulation, synchronous detection, phase‑sensitive detection, lock‑in amplification and square‑wave multiplication, and can be configured for gains of ±1, ±2 or multiplexed gains of +1 to +4.
Key features include a 100 dB channel‑to‑channel separation at 10 kHz, pin‑programmable closed‑loop gains, optional input bias compensation, and a precision comparator for fast switching. The device is available in several packages (PDIP, SOIC, CLCC, etc.) with supply ranges from ±5 V to ±16.5 V and a unity‑gain bandwidth of 2 MHz.
| Closed‑Loop Gain Error | 0.05 % |
|---|---|
| Closed‑Loop Gain Match | 0.05 % |
| Supply Voltage Range | ±5 V to ±16.5 V |
| Unity‑Gain Bandwidth | 2 MHz |
| Slew Rate | 45 V/µs |
| Channel Separation @ 10 kHz | 100 dB |
| Input Offset Voltage (typical) | 100 µV |
| Supply Current (typical) | 4 mA |
The AD630 provides 100 dB channel‑to‑channel separation at 10 kHz.
The unity‑gain bandwidth is 2 MHz.
It operates from ±5 V up to ±16.5 V, depending on the package.
The typical slew rate is 45 V/µs.