ADS7843E

The ADS7843E is designed as a 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface and low on-resistance switches for driving touch screens.

ADS7843E has eight features. (1)4-wire touch screen interface. (2)Ratiometric conversion. (3)Single supply 2.7V to 5V. (4)Up to 125kHz conversion rate. (5)Serial interface. (6)Programmable 8- or 12-bit resolution. (7)2 auxiliary analog inputs. (8)Full power-down control. Those are all the main features.

Some absolute maximum ratings of ADS7843E 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 Vcc+0.3V. (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 of ADS7843E are concluded into several points as follow. (1)Its full-scale input span would be min 0V and max Vref. (2)Its absolute input range would be min -0.2V and max Vcc+0.2V for positive input and would be min -0.2V and max +0.2V for negative input. (3)Its capacitance would be typ 25pF. (4)Its leakage current would be typ 0.1uA. (5)Its resolution would be typ 12bits. (6)Its no missing codes would be min 11bits. (7)Its integral linearity error would be max +/-2LSB. (8)Its offser error would be max +/-6LSB. (9)Its gain error would be max +/-4LSB. (10)Its noise would be typ 30uVrms. (11)Its power supply rejection would be typ 70dB. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!

The ADS7843E is one member of the ADS7843 family which deisgned as one kind of 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface and low on-resistance switches for driving touch screens.It includes a shutdown mode which reduces typical power dissipation to under 0.5mW and guaranteed down to 2.7V operation.

Features of the ADS7843E are:(1)4-wire touch screen interface;(2)ratiometric conversion;(3)single supply: 2.7v to 5v;(4)up to 125khz conversion rate;(5)serial interface;(6)programmable 8- or 12-bit resolution;(7)2 auxiliary analog inputs;(8)full power-down control.

The absolute maximum ratings of the ADS7843E can be summarized as:(1)+Vcc to GND:-0.3V to +6V;(2)analog inputs to GND:-0.3V to +VCC+0.3V;(3)digital inputs to GND:-0.3V to +VCC+0.3V;(4)power dissipation:250 mW;(5)maximum junction temperature:+150°C;(6)operating temperature range:-40°C to +85°C;(7)storage temperature range:-65°C to +150°C;(8)lead temperature (soldering, 10s):+300°C.If you want to know more information such as the electrical characteristics about the ADS7843E,please download the datasheet in www.seekic.com or www.chinaicmart.com .