General Description

The MAX113/MAX117 are microprocessor-compatible, 8-bit, 4-channel and 8-channel analog-to-digital converters (ADCs). They operate from a single +3V supply and use a half-flash technique to achieve a 1.8µs conversion time (400ksps). A power-down pin (PWRDN) reduces current consumption to 1µA typical. The devices return from power-down mode to normal operating mode in less than 900ns, allowing large supplycurrent reductions in burst-mode applications. (In burst mode, the ADC wakes up from a low-power state at specified intervals to sample the analog input signals.) Both converters include a track/hold, enabling the ADC to digitize fast analog signals.

Features

♦ +3.0V to +3.6V Single-Supply Operation

♦ 4 (MAX113) or 8 (MAX117) Analog Input Channels

♦ Low Power: 1.5mA (operating mode)

                       1µA (power-down mode)

♦ Total Unadjusted Error ≤ 1LSB

♦ Fast Conversion Time: 1.8µs per Channel

♦ No External Clock Required

♦ Internal Track/Hold

♦ Ratiometric Reference Inputs

♦ Internally Connected 8th Channel Monitors Reference Voltage (MAX117)

Applications

    Battery-Powered Systems

    Portable Equipment

    System-Health Monitoring

    Remote Data Acquisition

    Communications Systems