MAX1144

19-2465; Rev 0; 4/02 www.DataSheet4U.com 14-Bit ADCs, 150ksps, 3.3V Single Supply General Description Features o 150ksps (Bipolar) and 125ksps (Unipolar) Sampling ADC o 14 Bits, No Missing Codes o 1LSB INL Guaranteed o -100dB THD o 3.3V Single-Supply Operation o Low-Power Operation 5mA typ (Unipolar Mode) o 1.2µA Shutdown Mode o Software-Configurable Unipolar and Bipolar Input Ranges 0 to +6V and ±6V (MAX1144) 0 to +2.048V and ±2.048V (MAX1145) o Internal or External Clock o SPI/QSPI/MICROWIRE TMS320-Compatible Serial Interface o Three User-Programmable Logic Outputs o Small 20-Pin SSOP Package MAX1144/MAX1145 The MAX1144/MAX1145 are 150ksps, 14-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold, clock, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (THD ≥ 90dB), high speed (150ksps in bipolar mode), and low power (8.0mA) of these ADCs make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1144 accepts input signals of 0 to +6V (unipolar) or ±6V (bipolar), while the MAX1145 accepts input signals of 0 to +2.048V (unipolar) or ±2.048V (bipolar). Operating from a single 3.135V to 3.465V analog digital supply, powerdown modes reduce current consumption to 0.15mA at 10ksps and further red...