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

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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
    • Industrial Process Control
    • Test Equipment
    • Robotics
    • DSP Servo Control
    • Medical Instrumentation
    • Portable Data Acquisition Systems

WEBENCH® Designer ADS8512


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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) SNR (dB) THD (Typ) (dB) Rating
ADS8512 Order now 12     40     1     SPI     -40 to 85     SOIC | 16     5.04 | 1ku     155     16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)     SAR     Single-Ended         Ext
Oscillator     10     -10     4.75     5.25     4.75     5.25     0.5     74     -98     Catalog