ADS8512 - 12-Bit 40kSPS Low-Power Sampling ADC With Internal Reference and Serial Interface

The ADS8512 is a complete low-power, single 5-V supply, 12-bit sampling analog-to-digital(A/D) converter. It contains a complete 12-bit capacitor-based, successive approximation register (SAR) A/D converter with sample-and-hold (S/H), clock, reference, and serial data interface. The converter can be configured for a variety of input ranges including ±10 V, ±5 V, 0 V to 10 V, and 0.5 V to 4.5 V. A high-impedance, 0.3-V to 2.8-V input is also available with input impedance greater than 10 MΩ. For most input ranges, the input voltage can swing to 25 V or -25 V without damage to the converter.

An SPI-compatible serial interface allows data to be synchronized to an internal or external clock. The ADS8512 is specified at 40-kHz sampling rate over the -40°C to +85°C industrial temperature range.

• 40-kHz Minimum SamplingRate
• Very Low Power: 25 mW
• ±3.33-V, ±5-V, ±10-V, 4-V, and 10-V Input Ranges
• 73.9-dB SINAD with 10-kHz Input
• ±0.5 LSB Max INL
• ±0.5 LSB Max DNL, 12-Bit NMC
• ±5-mV BPZ, ±2 ppm/°C BPZ Drift
• 72-dB Min SINAD, 80-dB Min SFDR
• Uses Internal or External 2.5-V Reference
• No External Calibration Resistors Required
• Single 5-V Analog Supply:
  • 32.5-mW Max Power Dissipation
  • 50-µW Max Power-Down Mode
• SPI-Compatible Serial Port up to 20MHz, with Master/Slave Feature
• Global CONV and 3-Stated Bus for Multi-Chip Simultaneous S/H Operation
• Pin-Compatible with ADS7812 and 16-Bit ADS7813/8513
• SO-16 Package
• APPLICATIONS
  • Industrial Process Control
  • Test Equipment
  • Robotics
  • DSP Servo Control
  • Medical Instrumentation
  • Portable Data Acquisition Systems