AS1538

www.DataSheet4U.com AS1538/AS1540 8 / 4 - C h a n n e l , 1 2 - B i t I ² C A n a l o g - t o - D i g i ta l C o n v e r t e r D a ta S he e t 1 General Description The AS1538/AS1540 are single-supply, low-power, 12bit data acquisition devices featuring a serial I²C interface and an 8-channel (AS1538) or 4-channel (AS1540) multiplexer. The analog-to-digital (A/D) converters features a sample-and-hold amplifier an internal asynchronous clock and an internal reference. The combination of an I C serial, 2-wire interface and micropower consumption makes the AS1538 and AS1540 ideal for applications requiring the A/D converter to be close to the input source in remote locations and for applications requiring isolation. The device is available in a TSSOP-16 or TQFN 4x4 16pin package. 2 2 Key Features ! ! ! ! ! ! ! ! ! Single Supply: 2.7 to 5.25V 8-Channel Multiplexer (AS1538) 4-Channel Multiplexer (AS1540) Sampling Rate: 50kSPS No Missing Codes Internal Reference: 2.5V High Speed I C Interface at 3.4MHz <1.5µA Full Shutdown Current TSSOP-16 or TQFN 4x4 16-pin Package 2 3 Applications The device is ideal for voltage-supply monitoring, isolated data acquisition, transducer interfaces, batteryoperated systems, remote data acquisition or any other analog-to-digital conversion application. Figure 1. Block Diagram CH0 CH1 CH2 CH3 CH4 CH5 AS1538 only CH6 CH7 COM 8-Channel MUX Sample/ Hold Amp Successive Approximation Register Serial Interface SDA SCL A0 A1 AS1538/AS1540 CDAC C...