Overview
The AD7634BSTZ is an 18-bit, high-speed analog-to-digital converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS high voltage process. This charge redistribution successive approximation register (SAR) architecture ADC is designed for high-performance applications, offering a sampling rate of up to 670 kSPS. The device features a fully differential analog input, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. Configuration can be done through hardware or via a dedicated write-only serial configuration port for input range and operating mode. The AD7634 operates over a temperature range of −40°C to +85°C, making it suitable for a wide range of industrial and medical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 18 bits | |
| Sampling Rate | Up to 670 kSPS | |
| Analog Input Range | Four different ranges | |
| Input Bandwidth | 45 MHz | |
| Signal-to-Noise Ratio (SNR) | 98.5 to 101 dB | dB |
| Signal-to-(Noise + Distortion) Ratio (SINAD) | 100 dB | dB |
| Total Harmonic Distortion (THD) | −112 dB | dB |
| Spurious-Free Dynamic Range (SFDR) | 113 dB | dB |
| Aperture Delay | 2 ns | ns |
| Aperture Jitter | 5 ps rms | ps |
| Power Dissipation | 180 mW @ 670 kSPS, 28 mW @ 100 kSPS, 10 mW @ 1 kSPS | mW |
| Package Type | 48-Lead LQFP (7mm x 7mm) | |
| Operating Temperature Range | −40°C to +85°C | °C |
Key Features
- High-speed 18-bit SAR ADC with up to 670 kSPS sampling rate
- Fully differential analog inputs with four different input ranges
- Internal conversion clock, internal reference, and reference buffer
- Error correction circuits for improved accuracy
- Both serial and parallel system interface ports for flexible data transfer
- Configuration through hardware or a dedicated write-only serial configuration port
- Low power dissipation: 180 mW @ 670 kSPS, 28 mW @ 100 kSPS, 10 mW @ 1 kSPS
- Pb-free, 48-lead LQFP and LFCSP packages
Applications
- CT scanners
- High dynamic data acquisition systems
- Σ-Δ replacement in various applications
- Spectrum analysis
- Medical instruments
- Instrumentation and process controls
Q & A
- What is the resolution of the AD7634BSTZ ADC?
The AD7634BSTZ has an 18-bit resolution. - What are the sampling rates available for the AD7634BSTZ?
The AD7634BSTZ can sample at rates up to 670 kSPS. - What types of analog input ranges does the AD7634BSTZ support?
The AD7634BSTZ supports four different analog input ranges. - What is the input bandwidth of the AD7634BSTZ?
The input bandwidth is 45 MHz. - How is the AD7634BSTZ configured?
The device can be configured through hardware or via a dedicated write-only serial configuration port. - What are the power dissipation levels for the AD7634BSTZ at different sampling rates?
The power dissipation is 180 mW @ 670 kSPS, 28 mW @ 100 kSPS, and 10 mW @ 1 kSPS. - What are the operating temperature ranges for the AD7634BSTZ?
The operating temperature range is −40°C to +85°C. - What types of packages are available for the AD7634BSTZ?
The device is available in 48-lead LQFP and LFCSP packages. - What are some common applications of the AD7634BSTZ?
Common applications include CT scanners, high dynamic data acquisition systems, Σ-Δ replacement, spectrum analysis, medical instruments, and instrumentation and process controls. - Does the AD7634BSTZ have internal error correction circuits?
Yes, the AD7634BSTZ includes error correction circuits for improved accuracy.
