MAX1452

19-1829; Rev 1; 6/01 KIT ATION EVALU E L B A AVAIL Low-Cost Precision Sensor Signal Conditioner General Description Features o Provides Amplification, Calibration, and Temperature Compensation o Accommodates Sensor Output Sensitivities from 1mV/V to 40mV/V o Single Pin Digital Programming o No External Trim Components Required o 16-Bit Offset and Span Calibration Resolution o Fully Analog Signal Path o On-Chip Lookup Table Supports Multipoint Calibration Temperature Correction o Supports Both Current and Voltage Bridge Excitation o Fast 3.2kHz Frequency Response o On-Chip Uncommitted Op Amp o Secure-Lock™ Prevents Data Corruption o Low 2mA Current Consumption MAX1452 The MAX1452 is a highly integrated analog-sensor signal processor optimized for industrial and process control applications utilizing resistive element sensors. The MAX1452 provides amplification, calibration, and temperature compensation that enables an overall performance approaching the inherent repeatability of the sensor. The fully analog signal path introduces no quantization noise in the output signal while enabling digitally controlled trimming with the integrated 16-bit DACs. Offset and span are calibrated using 16-bit DACs, allowing sensor products to be truly interchangeable. The MAX1452 architecture includes a programmable sensor excitation, a 16-step programmable-gain amplifier (PGA), a 768-byte (6144 bits) internal EEPROM, four 16-bit DACs, an uncommitted op amp, and an onchip temperature sensor...