Overview
The AD7634BCPZ is an 18-bit, charge redistribution successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is fabricated on Analog Devices' iCMOS high voltage process and is designed for high-speed and high-precision data acquisition. The AD7634 features a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference and buffer, error correction circuits, and both serial and parallel system interface ports. It operates over a temperature range of −40°C to +85°C and is available in 48-lead LQFP and LFCSP packages.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 18 bits | |||
| Sampling Rate | 1 kSPS | 100 kSPS | 670 kSPS | kSPS |
| Signal-to-Noise Ratio (SNR) | 98.5 dB | 100.5 dB | - | dB |
| Signal-to-(Noise + Distortion), SINAD | 100 dB | - | - | dB |
| Total Harmonic Distortion | -112 dB | - | - | dB |
| Spurious-Free Dynamic Range | 113 dB | - | - | dB |
| Aperture Delay | 2 ns | - | - | ns |
| Aperture Jitter | 5 ps rms | - | - | ps |
| Input Bandwidth | 45 MHz | - | - | MHz |
| Power Dissipation | 10 mW @ 1 kSPS | 28 mW @ 100 kSPS | 180 mW @ 670 kSPS | mW |
| Package Type | 48-Lead LQFP and LFCSP (7 mm × 7 mm) | |||
Key Features
- High-Speed Sampling: The AD7634 supports sampling rates up to 670 kSPS, making it suitable for high-speed data acquisition applications.
- High Resolution: The device features an 18-bit resolution, providing high precision in analog-to-digital conversion.
- Flexible Input Ranges: It offers four different analog input ranges, allowing for versatility in various applications.
- Multiple Sampling Modes: The AD7634 operates in three different sampling modes, including warp, normal, and impulse modes.
- Internal Reference and Buffer: The device includes an internal reference and buffer, which simplifies system design and improves performance.
- Serial and Parallel Interfaces: It supports both serial and parallel system interface ports, enhancing flexibility in system integration.
- Low Power Consumption: The device has low power dissipation, ranging from 10 mW to 180 mW depending on the sampling rate.
Applications
- CT Scanners: The high precision and speed of the AD7634 make it suitable for computed tomography (CT) scanners.
- High Dynamic Data Acquisition: It is used in applications requiring high dynamic range and high-speed data acquisition.
- Sigma-Delta (Σ-Δ) Replacement: The AD7634 can replace Σ-Δ converters in certain applications due to its high performance and flexibility.
- Spectrum Analysis: Its high resolution and speed make it ideal for spectrum analysis applications.
- Medical Instruments: The device is used in various medical instruments due to its high precision and reliability.
- Instrumentation and Process Controls: It is also applied in instrumentation and process control systems where high accuracy and speed are required.
Q & A
- What is the resolution of the AD7634BCPZ?
The AD7634BCPZ has an 18-bit resolution.
- What are the sampling rates supported by the AD7634BCPZ?
The device supports sampling rates from 1 kSPS to 670 kSPS.
- What are the different sampling modes available in the AD7634BCPZ?
The AD7634BCPZ operates in warp, normal, and impulse sampling modes.
- Does the AD7634BCPZ have an internal reference and buffer?
Yes, the device includes an internal reference and buffer.
- What are the package types available for the AD7634BCPZ?
The device is available in 48-Lead LQFP and LFCSP (7 mm × 7 mm) packages.
- What is the operating temperature range of the AD7634BCPZ?
The device operates over a temperature range of −40°C to +85°C.
- What are some typical applications of the AD7634BCPZ?
Typical applications include CT scanners, high dynamic data acquisition, Σ-Δ replacement, spectrum analysis, medical instruments, and instrumentation and process controls.
- How much power does the AD7634BCPZ consume?
The power dissipation ranges from 10 mW at 1 kSPS to 180 mW at 670 kSPS.
- Does the AD7634BCPZ support both serial and parallel interfaces?
Yes, the device supports both serial and parallel system interface ports.
- What is the input bandwidth of the AD7634BCPZ?
The input bandwidth is 45 MHz.
