(China (Mainland))
Product Summary
The ADS7843E/2K5 is a 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface and low on-resistance switches for driving touch screens. Typical power dissipation is 750μW at a 125kHz throughput rate and a +2.7V supply. The reference voltage (VREF) can be varied between 1V and +VCC, providing a corresponding input voltage range of 0V to VREF. The ADS7843E/2K5 includes a shutdown mode which reduces typical power dissipation to under 0.5μW. The device is guaranteed down to 2.7V operation. The applications of the ADS7843E/2K5 inlcude personal digital assistants, portable instruments, point-of-sales terminals, pagers and touch-screen monitors.
Parametrics
ADS7843E/2K5 absolute maximum ratings: (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: 250mW; (5)Maximum Junction Temperature: +150℃; (6)Operating Temperature Range: –40 to +85℃; (7)Storage Temperature Range: –65 to +150℃; (8)Lead Temperature (soldering, 10s): +300℃.
Features
ADS7843E/2K5 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.
Diagrams
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 ADS7843E/2K5 |
Texas Instruments |
Touch Screen Converters & Controllers 4-wire Touch Screen Controller |
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ADS7843E/2K5G4 |
Texas Instruments |
Touch Screen Converters & Controllers 4-wire Touch Screen Controller |
Data Sheet |
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