Analog Devices AD7674 Product Info

• 18-bit resolution with no missing codes
• No pipeline delay (SAR architecture)
• Differential input range: ±V_REF (V_REF up to 5 V)
• Throughput
  
  • 800 kSPS (warp mode)
  • 666 kSPS (normal mode)
  • 570 kSPS (impulse mode)
• INL: ±2.5 LSB max (±9.5 ppm of full scale)
• Dynamic range : 103 dB typ (V_REF = 5 V)
• SINAD: 100 dB typ at 2 kHz (V_REF = 5 V)
• Parallel (18-, 16-, or 8-bit bus) and serial 5 V/3 V interface
• SPI/QSPI™/MICROWIRE/DSP compatible
• On-board reference buffer
• Single 5 V supply operation
• See data sheet for additional features

The AD7674 is an 18-bit, 800 kSPS, charge redistribution, successive approximation register (SAR) fully differential analog-to-digital converter (ADC) that operates on a single 5 V power supply. The device contains a high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports.

The device is available in a 48-lead LQFP or a 48-lead LFCSP with operation specified from −40°C to +85°C.

Product Highlights

1. High Resolution, Fast Throughput. The AD7674 is an 800 kSPS, charge redistribution, 18-bit, SAR ADC (no latency).
2. Excellent Accuracy. The AD7674 has a maximum integral nonlinearity of 2.5 LSB with no missing 18-bit codes.
3. Serial or Parallel Interface. Versatile parallel (18-, 16- or 8-bit bus) or 3-wire serial interface arrangement compatible with both 3 V and 5 V logic.

Applications

• CT scanners
• High dynamic data acquisition
• Geophone and hydrophone sensors
• ∑-∆ replacement (low power, multichannel)
• Instrumentation
• Spectrum analysis
• Medical instruments