Overview
The AD7631BCPZ is an 18-bit, charge redistribution, successive approximation register (SAR) architecture analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is fabricated using Analog Devices’ iCMOS high voltage process, ensuring high performance and reliability. The AD7631 is configured through hardware or via a dedicated write-only serial configuration port for input range and operating mode. It features a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference, error correction circuits, and both serial and parallel system interface ports.
Key Specifications
| Parameter | Typical | Maximum | Unit |
|---|---|---|---|
| Resolution | 18-bit | - | - |
| Sampling Rate | 250 kSPS | - | - |
| Integral Nonlinearity (INL) | ±1.5 LSB | ±2.5 LSB | - |
| Signal-to-Noise Ratio (SNR) | 101 dB @ 2 kHz | - | - |
| Total Harmonic Distortion (THD) | -112 dB @ 2 kHz | - | - |
| Dynamic Range | 102.5 dB | - | - |
| Internal Reference Voltage | 5.000 V | - | - |
| Temperature Drift of Internal Reference | ±3 ppm/°C | - | - |
| Power Dissipation @ 250 kSPS | 73 mW | - | - |
| Operating Temperature Range | -40°C to +85°C | - | - |
| Package Type | 48-lead LQFP and 48-lead LFCSP (7 mm × 7 mm) | - | - |
Key Features
- No pipeline delay due to SAR architecture.
- Parallel (18-/16-/8-bit bus) and serial interface options (SPI-/QSPI™-/MICROWIRE™-/DSP-compatible).
- Four different analog input ranges.
- Internal conversion clock and internal reference with buffer.
- Error correction circuits.
- Low power dissipation, scaling linearly with throughput.
- High speed sampling with an aperture delay of 2 ns and aperture jitter of 5 ps rms.
Applications
- Process controls.
- High-speed data acquisition.
- Digital signal processing.
- Spectrum analysis.
- Automated Test Equipment (ATE).
Q & A
- What is the resolution of the AD7631BCPZ ADC?
The AD7631BCPZ has an 18-bit resolution.
- What is the maximum sampling rate of the AD7631BCPZ?
The maximum sampling rate is 250 kSPS.
- What is the typical integral nonlinearity (INL) of the AD7631BCPZ?
The typical INL is ±1.5 LSB.
- What is the signal-to-noise ratio (SNR) of the AD7631BCPZ at 2 kHz?
The SNR is 101 dB at 2 kHz.
- What is the total harmonic distortion (THD) of the AD7631BCPZ at 2 kHz?
The THD is -112 dB at 2 kHz.
- What are the package options for the AD7631BCPZ?
The package options are 48-lead LQFP and 48-lead LFCSP (7 mm × 7 mm).
- What is the operating temperature range of the AD7631BCPZ?
The operating temperature range is -40°C to +85°C.
- Does the AD7631BCPZ have an internal reference?
Yes, it has an internal reference with a typical voltage of 5.000 V and a temperature drift of ±3 ppm/°C.
- What are the primary applications of the AD7631BCPZ?
The primary applications include process controls, high-speed data acquisition, digital signal processing, spectrum analysis, and automated test equipment (ATE).
- How does the power dissipation of the AD7631BCPZ vary with throughput?
The power dissipation scales linearly with throughput.
