Overview
The AD7631BSTZRL is an 18-bit, successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device is part of the iCMOS high voltage process family and is designed for high-speed data acquisition and signal processing. The AD7631 features a charge redistribution SAR architecture, which provides high accuracy and low power consumption. It operates with a sampling rate of up to 250 kSPS and includes an internal conversion clock, an internal reference, and error correction circuits. The device is configured through hardware or via a dedicated write-only serial configuration port for input range and operating mode settings.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 18-bit | |
| Sampling Rate | Up to 250 kSPS | |
| Integral Nonlinearity (INL) | ±1.5 LSB typical, ±2.5 LSB maximum | |
| Signal-to-Noise Ratio (SNR) | 101 dB @ 2 kHz | |
| Total Harmonic Distortion (THD) | -112 dB @ 2 kHz | |
| Input Range | Four different analog input ranges | |
| Internal Reference | 5 V, typical drift 3 ppm/°C | |
| Power Dissipation | 73 mW @ 250 kSPS, 10 mW @ 1 kSPS | |
| Package Type | 48-lead LQFP and 48-lead LFCSP | |
| Operating Temperature | -40°C to +85°C |
Key Features
- No pipeline delay due to SAR architecture
- Parallel (18-/16-/8-bit bus) and serial interface (SPI-/QSPI-/MICROWIRE-/DSP-compatible)
- High speed 18-bit sampling ADC with internal conversion clock and internal reference
- Error correction circuits and temperature output
- Four different analog input ranges configurable through hardware or serial configuration port
- Low power consumption with power scaled linearly with throughput
- RoHS compliant and Pb-free packaging options
Applications
- Process controls
- High-speed data acquisition
- Digital signal processing
- Spectrum analysis
- Automated Test Equipment (ATE)
Q & A
- What is the resolution of the AD7631BSTZRL ADC?
The AD7631BSTZRL has an 18-bit resolution.
- What is the maximum sampling rate of the AD7631BSTZRL?
The maximum sampling rate is up to 250 kSPS.
- What are the key interfaces available on the AD7631BSTZRL?
The device features parallel (18-/16-/8-bit bus) and serial interfaces (SPI-/QSPI-/MICROWIRE-/DSP-compatible).
- How is the input range configured on the AD7631BSTZRL?
The input range can be configured through hardware or via a dedicated write-only serial configuration port.
- What is the operating temperature range of the AD7631BSTZRL?
The device operates from -40°C to +85°C.
- Is the AD7631BSTZRL RoHS compliant?
- What are some typical applications of the AD7631BSTZRL?
- What is the power dissipation of the AD7631BSTZRL at different sampling rates?
- Does the AD7631BSTZRL have an internal reference?
- What is the signal-to-noise ratio (SNR) of the AD7631BSTZRL?
