ADS7842E

The ADS7842E is designed as a complete, 4-channel, 12-bit analogto-digitial converter (ADC). It contains a 12-bit, capacitor-based, SAR A/D with a sample-and-hold amplifier, interface for microprocessor use and parallel, three-state output drivers.

It has nine features. (1)Single supply 2.7V to 5V. (2)4-channel input multiplexer. (3)Up to 200kHz sampling rate. (4)Full 12-bit parallel interface. (5)+/-1LSB INL and DNL. (6)Guaranteed no missing codes. (7)72dB sinad. (8)Low power 2mW. (9)28-lead SSOP package. Those are all the main features.

Some absolute maximum ratings have been concluded into several points as follow. (1)Its +Vcc to GND would be from -0.3V to +6V. (2)Its analog inputs to GND would be from -0.3V to Vcc+0.3V. (3)Its digital inputs to GND would be from -0.3V to +6V. (4)Its power dissipation would be 250mW. (5)Its maximum junction temperature would be 150°C. (6)Its operating temperature range would be from -40°C to +85°C. (7)Its storage temperature range would be from -65°C to 150°C. (8)Its lead temperature (soldering 10s) would be +300°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics are concluded into several points as follow. (1)Its full-scale input span would be min 0V and max Vref. (2)Its capacitance would be typ 25pF. (3)Its leakage current would be typ +/-1uA. (5)Its resolution would be max 12bits. (6)Its no missing codes would be min 12bits. (7)Its integral linearity error would be max +/-2LSB. (8)Its offser error would be max +/-3LSB. (9)Its gain error would be max +/-4LSB. (10)Its noise would be typ 30uVrms. (11)Its power supply rejection would be typ 70dB. (12)Its Vcc would be min 4.75V and max 5.25V. (13)Its digital input voltage would be min 3.0V and max 5.5V for high and would be min -0.3V and max +0.8V for low. (14)Its output voltage would be min 3.5V for high and would be max 0.4V for low. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!