Overview
The AD630ADZ, produced by Analog Devices Inc., is a high precision balanced modulator/demodulator. It combines a flexible commutating architecture with the accuracy and temperature stability afforded by laser wafer trimmed thin film resistors. This component is designed for precision signal processing and instrumentation applications that require a wide dynamic range. It can recover a small signal from 100 dB of interfering noise, making it highly suitable for applications such as lock-in amplifiers and synchronous demodulation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Open-Loop Gain | 90 | 110 | 130 | dB |
| Closed-Loop Gain Error (±1, ±2) | 0.1 | 0.05 | 0.1 | % |
| Closed-Loop Gain Match | 0.1 | 0.05 | 0.1 | % |
| Closed-Loop Gain Drift | 2 | 2 | 2 | ppm/°C |
| Input Offset Voltage | 100 | 500 | 1000 | µV |
| Slew Rate | - | 45 | - | V/µs |
| Full Power Bandwidth | - | 350 | - | kHz |
| Crosstalk at 1 kHz | -120 | - | - | dB |
| Crosstalk at 10 kHz | -100 | - | - | dB |
| Supply Voltage | -18 | - | 18 | V |
Key Features
- High precision balanced modulator/demodulator with flexible commutating architecture.
- Laser wafer trimmed thin film resistors for accuracy and temperature stability.
- Pin programmable, closed-loop gains of ±1 and ±2 with 0.05% accuracy.
- Low crosstalk: −120 dB at 1 kHz, −100 dB at 10 kHz.
- High slew rate of 45 V/µs and full power bandwidth of 350 kHz.
- Optional input bias current compensation resistors and common-mode and differential-offset voltage adjustment.
- Channel status output indicating which of the two differential inputs is active.
- Can be used as a 2-channel multiplexer with gains of 1, 2, 3, or 4.
Applications
- Precision signal processing and instrumentation.
- Synchronous demodulation in lock-in amplifier configurations.
- Balanced modulation and demodulation.
- Phase detection and quadrature detection.
- Phase sensitive detection.
- Square wave multiplication.
Q & A
- What is the primary function of the AD630ADZ?
The AD630ADZ is a high precision balanced modulator/demodulator used in precision signal processing and instrumentation applications.
- What are the available closed-loop gains for the AD630ADZ?
The AD630ADZ offers pin programmable, closed-loop gains of ±1 and ±2 with 0.05% accuracy.
- What is the slew rate of the AD630ADZ?
The slew rate of the AD630ADZ is 45 V/µs.
- What is the full power bandwidth of the AD630ADZ?
The full power bandwidth of the AD630ADZ is 350 kHz.
- How does the AD630ADZ handle crosstalk?
The AD630ADZ has low crosstalk of −120 dB at 1 kHz and −100 dB at 10 kHz.
- Can the AD630ADZ be used as a multiplexer?
Yes, the AD630ADZ can be used as a 2-channel multiplexer with gains of 1, 2, 3, or 4.
- What are the typical applications of the AD630ADZ?
The AD630ADZ is typically used in synchronous demodulation, balanced modulation and demodulation, phase detection, quadrature detection, and phase sensitive detection.
- How does the AD630ADZ handle input offset voltage?
The AD630ADZ has an input offset voltage of 100 µV, and it includes options for common-mode and differential-offset voltage adjustment.
- What is the supply voltage range for the AD630ADZ?
The supply voltage range for the AD630ADZ is ±18 V.
- Does the AD630ADZ have any special features for signal processing?
Yes, the AD630ADZ includes laser wafer trimmed thin film resistors for high accuracy and temperature stability, and it has a channel status output indicating which of the two differential inputs is active.
