The continuous-time analog modulator input architecture avoids the need for an external antialias filter. The programmable gain front end simplifies system design, extends the dynamic range, and reduces the system board area. Low operating power and standby modes makes the AD1555 ideal for remote battery-powered data acquisition systems. The AD1555 is fabricated on Analog Devices' BiCMOS process that has high performance bipolar devices along with CMOS transistors. The AD1555 and AD1556 are packaged, respectively, in 28-lead PLCC and 44-lead MQFP packages and are specified from 55C to +85C (AD1556 and AD1555 B Grade) and from 0C to 85C (AD1555 A Grade).