ADS8509 16-Bit, 250-kSPS, 1-Ch SAR ADC with programmable (±10/±5/±3.3V) input ranges and SPI interface | TI.com

ADS8509
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16-Bit, 250-kSPS, 1-Ch SAR ADC with programmable (±10/±5/±3.3V) input ranges and SPI interface

 

Description

The ADS8509 is a complete 16-bit sampling analog-to-digital (A/D) converter using state-of-the-art CMOS structures. It contains a complete 16-bit, capacitor-based, successive approximation register (SAR) A/D converter with sample-and-hold, reference, clock, and a serial data interface. Data can be output using the internal clock or can be synchronized to an external data clock. The ADS8509 also provides an output synchronization pulse for ease of use with standard DSP processors.

The ADS8509 is specified at a 250-kHz sampling rate over the full temperature range. Precision resistors provide various input ranges including ±10 V and 0 V to 5 V, while the innovative design allows operation from a single +5-V supply with power dissipation under 100 mW.

The ADS8509 is available in 20-pin SO and 28-pin SSOP packages, both fully specified for operation over the industrial –40°C to 85°C temperature range.

Features

  • 250-kHz Sampling Rate
  • 4-V, 5-V, 10-V, ±3.33-V, ±5-V, and ±10-V Input Ranges
  • ±2 LSB Max INL
  • ±1 LSB Max DNL, 16-Bit No Missing Codes
  • SPI Compatible Serial Output with Daisy-Chain (TAG) Feature
  • Single 5-V Supply
  • Pin-Compatible with ADS7809 (Low Speed) and 12-Bit ADS8508/7808
  • Uses Internal or External Reference
  • 70-mW Typ Power Dissipation at 250 KSPS
  • 20-Pin SO and 28-Pin SSOP Packages
  • Simple DSP Interface
  • APPLICATIONS
    • Industrial Process Control
    • Data Acquisition Systems
    • Digital Signal Processing
    • Medical Equipment
    • Instrumentation

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WEBENCH® Designer ADS8509



Parametrics

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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
ADS8509 Order now 16     250     1     SPI     -40 to 85     SOIC | 20
SSOP | 28    
12.70 | 100u     155     20SOIC: 132 mm2: 10.3 x 12.8 (SOIC | 20)
28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)    
SAR     Single-Ended         Ext
Int    
Daisy-Chainable
Oscillator    
10     -10     4.75     5.25     4.75     5.25     2     88     -98     Catalog