ADS8254 16-Bit, 4 Channel Differential Complete Acquisition Solution (ADC, REF, and Input Buffer) | TI.com

ADS8254 (NRND)

16-Bit, 4 Channel Differential Complete Acquisition Solution (ADC, REF, and Input Buffer)

 

Not Recommended for New Designs (NRND)

Replaced By ADS8472 – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. The ADS8472 combined with the THS4032 offers similar functionality.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Recommended Replacement Devices

The ADS8472 combined with the THS4032 offers similar functionality.

Description

The ADS8254 is a high-performance analog system-on-chip (SoC) device with an 16-bit, 1-MSPS A/D converter, 4-V internal reference, an on-chip ADC driver (OPA), and a 4-channel differential multiplexer. The channel count of the multiplexer and auto/manual scan modes of the device are user selectable.

The ADC driver is designed to leverage the very high noise performance of the differential ADC at optimum power usage levels.

The ADS8254 outputs a buffered reference signal for level shifting of a ±4-V bipolar signal with an external resistance divider. A Vref/2 output signal is available to set the common-mode of a signal conditioning circuit. The device also includes an 16-/8-bit parallel interface.

The ADS8254 is available in a 9 mm × 9 mm, 64-pin QFN package and is characterized from –40°C to 85°C.

Features

  • 1.0-MHz Sample Rate, Zero Latency at Full Speed
  • 16-Bit Resolution
  • Supports Pseudo-Bipolar Differential Input Range: –4 V
    to +4 V with 2-V Common-Mode
  • Built-In Four Channel, Differential Ended Multiplexer; with
    Channel Count Selection and Auto/Manual Mode
  • On-Board Differential ADC Driver (OPA)
  • Buffered Reference Output to Level Shift Bipolar ±4-V
    Input with External Resistance Divider
  • Reference/2 Output to Set Common-Mode for External Signal
    Conditioner
  • 16-/8-Bit Parallel Interface
  • SNR: 95.4dB Typ at 2-kHz I/P
  • THD: –118dB Typ at 2-kHz I/P
  • Power Dissipation: 331.25 mW at 1 MSPS
  • Internal Reference
  • Internal Reference Buffer
  • 64-Pin QFN Package