LTC1598

U U LTC1594/LTC1598 4- and 8-Channel, Micropower Sampling 12-Bit Serial I/O A/D Converters FEATURES ■ 12-Bit Resolution ■ Auto Shutdown to 1nA ■ Low Supply Current: 320μA Typ ■ Guaranteed ±3/4LSB Max DNL ■ Single Supply 5V Operation (3V Versions Available: LTC1594L/LTC1598L) ■ Multiplexer: 4-Channel MUX (LTC1594) 8-Channel MUX (LTC1598) ■ Separate MUX Output and ADC Input Pins ■ MUX and ADC May Be Controlled Separately ■ Sampling Rate: 16.8ksps ■ I/O Compatible with QSPI, SPI and MICROWIRETM, etc. ■ Small Package: 16-Pin Narrow SO (LTC1594) 2U4-Pin SSOP (LTC1598) APPLICATIO S ■ Pen Screen Digitizing ■ Battery-Operated Systems ■ Remote Data Acquisition ■ Isolated Data Acquisition ■ Battery Monitoring ■ Temperature Measurement DESCRIPTIO The LTC®1594/LTC1598 are micropower, 12-bit sampling A/D converters that feature 4- and 8-channel multiplexers, respectively. They typically draw only 320μA of supply current when converting and automatically power down to a typical supply current of 1nA between conversions. The LTC1594 is available in a 16-pin SO package and the LTC1598 is packaged in a 24-pin SSOP. Both operate on a 5V supply. The 12-bit, switched-capacitor, successive approximation ADCs include a sample-and-hold. On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three or four wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data through isolation barr...