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ADS7891

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 ·W)· Internal ...

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SeekIC No. : 004277276 Detail

ADS7891: 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· ...

ADS7891 Data Sheet

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Part Number:
ADS7891
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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 ·W)
· Internal Reference
· Internal Reference Buffer
· 8-/14-Bit Bus Transfer
· 48-Pin TQFP Package


Application

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


Pinout

Connection Diagram


Specifications

  UNIT
+IN to AGND −0.3 V to +VA + 0.1 V
-IN to AGND −0.3 V to 0.5 V
+VA to AGND −0.3 V to 7 V
+VBD to BDGND −0.3 V to 7 V
Digital input voltage to GND −0.3 V to (+VBD + 0.3 V)
Digital output to GND −0.3 V to (+VBD + 0.3 V)
Operating temperature range −40°C to 85°C
Storage temperature range −65°C to 150°C
Junction temperature (TJmax) 150°C
TQFP package Power dissipation (TJ MaxTA)/ JA
JA Thermal impedance 86°C/W
Lead temperature, soldering Vapor phase (60 sec) 215°C
Infrared (15 sec) 220°C

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these o r any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability


Description

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 ADS7891 operates at lower power when used at lower conversion rates. The device is available in a 48-pin TQFP package.




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