ADS8900B 20-Bit, 1-MSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface | TI.com

ADS8900B (ACTIVE) 20-Bit, 1-MSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface

 

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.

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

All trademarks are the property of their respective owners.

Parametrics

Compare all products in Precision ADCs (<=10MSPS) Email Download to Excel
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
ADS8900B Order now 20     1000     1     Enhanced SPI
SPI    
-40 to 125     VQFN | 24     24.95 | 1ku     21     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)     SAR     Differential         Ext     Daisy-Chainable
Oscillator    
5     -5     3     5.5     1.65     5.5     3.9     104.5     -125     Catalog    
ADS8881 Order now 18     1000     1     SPI     -40 to 85
0 to 70    
VSON | 10
VSSOP | 10    
11.95 | 1ku     5.5     10VSON: 9 mm2: 3 x 3 (VSON | 10)
10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)    
SAR     Differential         Ext     Daisy-Chainable
Oscillator
Small Size    
5     -5     2.7     3.6     1.65     3.6     2     100     -115     Catalog    
ADS8902B Order now 20     500     1     Enhanced SPI
SPI    
-40 to 125     VQFN | 24     15.95 | 1ku     16     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)     SAR     Differential         Ext     Daisy-Chainable
Oscillator    
5     -5     3     5.5     1.65     5.5     3.9     104.5     -125     Catalog