16-Bit, Low-Power, 2-Channel, Sigma-Delta ADCs

The MAX1415/MAX1416 low-power, 2-channel, serial-output analog-to-digital converters (ADCs) use a sigma-delta modulator with a digital filter to achieve 16-bit resolution with no missing codes. These ADCs are pin-compatible upgrades to the MX7705/AD7705. The MAX1415/MAX1416 feature an internal oscillator (1MHz or 2.4576MHz), an on-chip input buffer, and a programmable gain amplifier (PGA). The devices offer an SPI™-/QSPI™-/MICROWIRE™-compatible serial interface.

The MAX1415/MAX1416 are available in 16-pin PDIP, SO, and TSSOP packages.

Applications

* Flow and Gas Meters * Industrial Instruments * Loop-Powered Systems * Medical Instrumentation * Pressure Transducers * RTD Measurements * Strain-Gauge Measurements * Thermocouple Measurements * Weigh Scales

* Improve Measurement Quality with Excellent DC Accuracy

* 16-Bit Sigma-Delta ADC with Two Fully-Differential Input Channels

* 0.0015% INL (max) with No Missing Codes

* Minimize Power Consumption with Low-Power Dissipation

* 1.2mW (max) 3V supply

* 2μA (typ) Power-Down Current

* Lower System Cost with Integrated Functionality

* PGA with 1 to 128 Programmable Gain

* Optional Input Buffers

* > 98dB 50Hz/60Hz Rejection

* Increase System Accuracy with Built-in Self Calibration

* On-Demand Offset and Gain Self-Calibration and System Calibration

* User-Programmable Offset and Gain Registers

* Flexible Single Supply Options

* 2.7V to 3.6V (MAX1415)

* 4.75V to 5.25V (MAX1416)

* Pin Compatible Upgrades for MX7705/AD7705