The ADS7881 is a 12-bit 4-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 12-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.
● 4 MHz Sample Rate, 12-Bit Resolution
● Zero Latency
● Unipolar, Pseudo Differential Input, Range:
● 0 V to 2.5 V
● High Speed Parallel Interface
● 71 dB SNR and 88.5 dB THD at 1 MHz I/P
● Power Dissipation 95 mW at 4 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
● Ultra-Sound Detection
