ADS7890 - 2.7V-5.25V Digital, 5V Analog, 14-Bit 1.25MSPS Serial ADC With Internal Reference

The ADS7890 is a 14-bit 1.25-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit serial SPI or DSP compatible interface. The device has a pseudo-differential input stage.

The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. The device operates at lower power when used at lower conversion rates because of the nap feature. The device is available in a 48-pin TQFP package.

Products containing the "ADS7890" keyword are: ADS7890IPFB , ADS7890IPFBR , ADS7890IPFBRG4 , ADS7890IPFBRG4 , ADS7890IPFBT , ADS7890IPFBT , ADS7890IPFBTG4 , ADS7890IPFBTG4

• 1.25 MHz Sample Rate, 14-Bit Resolution
• Zero Latency
• Unipolar, Pseudo Differential Input, Range:
  • 0 V to 2.5 V
• SPI™ Compatible Serial Interface
• 77.5 dB SNR and –95 dB THD at 0.5 MHz I/P
• Power Dissipation 45 mW at 1.25 MSPS
• Nap Mode (10 mW Power Dissipation)
• Power Down (10 µW)
• Internal Reference
• Internal Reference Buffer
• 48-Pin TQFP Package
• APPLICATIONS
  • Optical Networking (DWDM, MEMS Based Switching)
  • Spectrum Analyzers
  • High Speed Data Acquisition Systems
  • High Speed Close-Loop Systems
  • Telecommunication

SPI is a trademark of Motorola, Inc.