Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs

The MAX5186 contains two 8-bit, simultaneous-update, current-output digital-to-analog converters (DACs) designed for superior performance in communications systems requiring analog signal reconstruction with low distortion and low-power operation. The MAX5189 provides equal specifications, with on-chip precision resistors for voltage output operation. The MAX5186/ MAX5189 are designed for a 10pV-s glitch operation to minimize unwanted spurious signal components at the output. An on-board 1.2V bandgap circuit provides a well-regulated, low-noise reference that can be disabled for external reference operation.

The MAX5186/MAX5189 are designed to provide a high level of signal integrity for the least amount of power dissipation. Both DACs operate from a single supply voltage of 2.7V to 3.3V. Additionally, these DACs have three modes of operation: normal, low-power standby, and complete shutdown, which provides the lowest possible power dissipation with a 1µA (max) shutdown current. A fast wake-up time (0.5µs) from standby mode to full DAC operation allows power conservation by activating the DACs only when required.

The MAX5186/MAX5189 are packaged in a 28-pin QSOP and are specified for the extended (-40°C to +85°C) temperature range. For higher resolution, dual 10-bit versions, refer to the MAX5180/MAX5183 data sheet.

Applications

* Arbitrary Waveform Generation (AWG) * Digital Signal Processing (DSP) * Imaging * Signal Reconstruction of I and Q * Transmit Signals

* 2.7V to 3.3V Single-Supply Operation

* Wide Spurious-Free Dynamic Range: 70dB at fOUT = 2.2MHz

* Fully Differential Outputs for Each DAC

* ±0.5% FSR Gain Mismatch at fOUT = 2.2MHz

* ±0.15° Phase Mismatch at fOUT = 2.2MHz

* Low-Current Standby or Full Shutdown Modes

* Internal 1.2V, Low-Noise Bandgap Reference

* Small 28-Pin QSOP Package