Overview
The AD7674ASTZ is an 18-bit, 800 kSPS (kilosamples per second), charge redistribution, successive approximation register (SAR) fully differential analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates on a single 5 V power supply and is known for its high resolution, fast throughput, and excellent accuracy. It features a SAR architecture with no pipeline delay, making it suitable for a variety of high-performance applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Sampling Rate | 800 kSPS (warp mode), 666 kSPS (normal mode), 570 kSPS (impulse mode) |
| Integral Nonlinearity (INL) | ±2.5 LSB max (±9.5 ppm of full scale) |
| Differential Input Range | ±VREF (VREF up to 5 V) |
| Dynamic Range | 103 dB typ (VREF = 5 V) |
| SINAD | 100 dB typ at 2 kHz (VREF = 5 V) |
| Interface | Parallel (18-, 16-, or 8-bit bus) and serial (SPI/QSPI/MICROWIRE/DSP compatible) |
| Power Supply | Single 5 V |
| Power Dissipation | 98 mW typ at 800 kSPS, 78 mW typ at 500 kSPS (impulse mode), 160 µW at 1 kSPS (impulse mode) |
| Package | 48-Lead LQFP or 48-Lead LFCSP |
| Operating Temperature | −40°C to +85°C |
Key Features
- No pipeline delay due to SAR architecture
- High speed and high resolution with 18-bit conversion
- Versatile interface options: parallel (18-, 16-, or 8-bit bus) and serial (SPI/QSPI/MICROWIRE/DSP compatible)
- Internal reference buffer and error correction circuits
- Single 5 V power supply operation
- Low power consumption with various power modes
Applications
- CT scanners
- High dynamic data acquisition
- Geophone and hydrophone sensors
- Σ-Δ replacement (low power, multichannel)
- Instrumentation
- Spectrum analysis
- Medical instruments
Q & A
- What is the resolution of the AD7674ASTZ?
The AD7674ASTZ has an 18-bit resolution. - What are the sampling rates of the AD7674ASTZ?
The sampling rates are 800 kSPS (warp mode), 666 kSPS (normal mode), and 570 kSPS (impulse mode). - What is the integral nonlinearity (INL) of the AD7674ASTZ?
The INL is ±2.5 LSB max (±9.5 ppm of full scale). - What is the differential input range of the AD7674ASTZ?
The differential input range is ±VREF (VREF up to 5 V). - What are the interface options for the AD7674ASTZ?
The interface options include parallel (18-, 16-, or 8-bit bus) and serial (SPI/QSPI/MICROWIRE/DSP compatible). - What is the power supply requirement for the AD7674ASTZ?
The device operates on a single 5 V power supply. - What are the typical power dissipation values for the AD7674ASTZ?
The typical power dissipation values are 98 mW at 800 kSPS, 78 mW at 500 kSPS (impulse mode), and 160 µW at 1 kSPS (impulse mode). - In what packages is the AD7674ASTZ available?
The device is available in 48-Lead LQFP and 48-Lead LFCSP packages. - What is the operating temperature range of the AD7674ASTZ?
The operating temperature range is −40°C to +85°C. - What are some common applications of the AD7674ASTZ?
Common applications include CT scanners, high dynamic data acquisition, geophone and hydrophone sensors, Σ-Δ replacement, instrumentation, spectrum analysis, and medical instruments.
