ADS7891IPFBR

The ADS7891 is a 14-bit 3-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 parallel interface with an additional byte mode that provides easy interface with 8-bit processors. 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. With nap mode enabled, the device operates at lower power when used at lower conversion rates. The device is available in a 48-pin TQFP package.

Applications

• Optical Networking (DWDM, MEMS Based Switching)
• Spectrum Analyzers
• High Speed Data Acquisition Systems
• High Speed Close-Loop Systems
• Telecommunication
• Ultra-Sound Detection

Key features

• 3 MHz Sample Rate, 14-Bit Resolution
• Zero Latency
• Unipolar, Pseudo Differential Input, Range: − 0 V to ±2.5 V
• High Speed Parallel Interface
• 78 dB SNR and 88.5 dB THD at 3 MSPS
• Power Dissipation 85 mW at 3 MSPS
• Nap Mode (10 mW Power Dissipation)
• Power Down (10 μW)
• Internal Reference
• Internal Reference Buffer
• 8-/14-Bit Bus Transfer
• 48-Pin TQFP Package