ADS8904B

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20-Bit, 250-kSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface

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Product details

Parameters

Resolution (Bits) 20 Number of input channels 1 Sample rate (Max) (kSPS) 250 Interface type Enhanced SPI, SPI Architecture SAR Input type Differential Multi-channel configuration Rating Catalog Reference mode Ext Input range (Max) (V) 5 Input range (Min) (V) -5 Features Daisy-Chainable, Oscillator Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 14 Analog voltage AVDD (Min) (V) 3 SNR (dB) 104.5 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 3.9 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Resolution: 20-Bits
  • High Sample Rate With No Latency Output:
    • ADS8900B: 1-MSPS
    • ADS8902B: 500-kSPS
    • ADS8904B: 250-kSPS
  • Integrated LDO Enables Low-Power, Single-Supply Operation
  • Low Power Reference Buffer with No Droop
  • Excellent AC and DC Performance:
    • SNR: 104.5-dB, THD: –125-dB
    • DNL: ±0.2-ppm, 20-Bit No-Missing-Codes
    • INL: ±1-ppm
  • Wide Input Range:
    • Unipolar Differential Input Range: ±VREF
    • VREF Input Range: 2.5-V to 5-V
  • Enhanced-SPI Digital Interface
    • Interface SCLK : 22-MHz at 1-MSPS.
    • Configurable Data Parity Output.
  • Extended Temperature Range: –40°C to +125°C
  • Small Footprint: 4-mm × 4-mm VQFN

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Description

The ADS8900B, ADS8902B, and ADS8904B (ADS890xB) belong to a family of pin-to-pin compatible, high-speed, single-channel, high-precision, 20-bit successive-approximation-register (SAR) analog-to-digital converters (ADCs) with an integrated reference buffer and integrated low-dropout regulator (LDO). The device family includes the ADS891xB (18-bit) and ADS892xB (16-bit) resolution variants.

The ADS89xxB boosts analog performance while maintaining high-resolution data transfer by using TI’s Enhanced-SPI feature. Enhanced-SPI enables ADS89xxB in achieving high throughput at lower clock speeds, there by simplifying the board layout and lowering system cost. Enhanced-SPI also simplifies the host’s clocking-in of data there by making it ideal for applications involving FPGAs, DSPs. ADS89xxB is compatible with standard SPI Interface.

The ADS89xxB has an internal data parity feature which can be appended to the ADC data output. ADC data validation by the host, using parity bits, improves system reliability.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$199.00
Description

The ADS8900B evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8900B successive-approximation register (SAR) analog-to-digital converter (ADC), which is a fully-differential input, 20-bit, 1-MSPS device (...)

Features
  • Includes hardware and software required for diagnostic testing, as well as accurate performance evaluation of the ADS8900B ADC
  • USB powered; no external power supply required
  • PHI controller provides convenient communication interface to ADS8900B ADC over a USB 2.0 (or higher) for power delivery, as (...)

Design tools & simulation

SIMULATION MODELS Download
SBAM305A.ZIP (16 KB) - IBIS Model
SIMULATION MODELS Download
SBAM306.TSC (7126 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBAM307.TSM (26 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOLS Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

Reference designs

REFERENCE DESIGNS Download
20-bit, 1-MSPS, 4-Ch Small Form Factor Design for Test and Measurement Applications Reference Design
TIPD211 — End equipment such as mixed signal SOC testers, memory testers, battery testers, liquid-crystal display (LCD) testers, benchtop equipment, high-density digital cards, high-density power cards, x-Ray, MRI, and so forth require multiple, fast, simultaneous sampling channels with excellent DC and AC (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGE) 24 View options

Ordering & quality

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