ADS8508 12-Bit 250kHz CMOS Analog-to-Digital Converter With Serial Interface 2.5V Internal Reference | TI.com

ADS8508 (ACTIVE)

12-Bit 250kHz CMOS Analog-to-Digital Converter With Serial Interface 2.5V Internal Reference

12-Bit 250kHz CMOS Analog-to-Digital Converter With Serial Interface 2.5V Internal Reference - ADS8508
Datasheet
 

Description

The ADS8508 is a complete 12-bit sampling analog-to-digital (A/D) converter using state-of-the-art CMOS structures. It contains a complete 12-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 ADS8508 also provides an output synchronization pulse for ease of use with standard DSP processors.

The ADS8508 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 ADS8508 is available in a 20-pin SO package, fully specified for operation over the industrial -40°C to 85°C temperature range.

Features

  • 250-kHz SamplingRate
  • 4-V, 5-V, 10-V, ±3.33-V, ±5-V, and ±10-V Input Ranges
  • 73-dB SINAD With 45-kHz Input
  • ±0.45 LSB Max INL
  • ±0.45 LSB Max DNL, 12-Bits No Missing Codes
  • ±1 LSB Bipolar Zero Errors
  • ±0.4 PPM/°C Bipolar Zero Error Drift
  • Six Specified Input Ranges
  • SPI Compatible Serial Output with Daisy-Chain (TAG) Feature
  • 5-V Supply
  • Pin-Compatible With ADS7808 (Low Speed) and 16-Bit ADS8509/7809
  • Uses Internal or External Reference
  • 70-mW Typ Power Dissipation at 250 KSPS
  • 20-Pin SO Package
  • Simple DSP Interface
  • APPLICATIONS
    • Industrial Process Control
    • Data Acquisition Systems
    • Digital Signal Processing
    • Medical Equipment
    • Instrumentation

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
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)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS8508
12    
250    
1    
SPI    
-40 to 85    
SOIC | 20    
4.98 | 1ku    
155    
20SOIC: 132 mm2: 10.3 x 12.8 (SOIC | 20)    
SAR    
Single-Ended    
   
Ext
Int    
Daisy-Chainable
Oscillator    
10    
-10    
4.75    
5.25    
4.75    
5.25    
0.45    
73    
73    
-95    
Catalog    

Design tool

WEBENCH® Designer ADS8508