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MAX5121：+3V/+5V, 12-Bit, Serial, Voltage-Output DACs with Internal Reference

Industry's First 10ppm/°C Internal Reference 12-Bit DACs

The MAX5120/MAX5121 are low-power, 12-bit, voltage-output digital-to-analog converters (DACs) with an internal precision bandgap reference and an output amplifier. The MAX5120 operates on a +5V supply with an internal amplifier reference of +2.5V and is capable of a +4.095V full-scale output range. The MAX5121, operating on +3V, delivers its +2.0475V full-scale output with an internal precision reference of +1.25V. If necessary, the user can override the internal, < 10ppm/°C voltage reference with an external reference. Both devices draw only 500µA of supply current, which reduces to 3µA in power-down mode. In addition, their power-up reset feature allows for a user-selectable initial output state of either 0V or midscale and minimizes output voltage glitches during power-up. The serial interface is compatible with SPI™, QSPI™ and MICROWIRE™, which makes the MAX5120/MAX5121 suitable for cascading multiple devices. Each DAC has a double-buffered input organized as an input register followed by a DAC register. A 16-bit shift register loads data into the input register. The DAC register may be updated independently or simultaneously with the input register. Both devices are available in a 16-pin QSOP package and are specified for the extended industrial (-40°C to +85°C) temperature range. For pin-compatible 14-bit upgrades, see the MAX5170/MAX5172 data sheet; for pin-compatible 13-bit versions, see the MAX5130/MAX5131 data sheet.

Key Features Single-Supply Operation +5V (MAX5120) +3V (MAX5121) Full-Scale Output Range +4.095V (MAX5120) +2.0475V (MAX5121) Built-In 10ppm/°C (max) Precision Bandgap Reference +2.5V (MAX5120) +1.25V (MAX5121) Adjustable Output Offset SPI/QSPI/Microwire-Compatible, 3-Wire Serial Interface Pin-Programmable Shutdown Mode and Power-Up Reset (0V or Midscale Output Voltage) Buffered Output Capable of Driving 5kΩ ||100pF or 4-20mA Loads Space-Saving 16-Pin QSOP Package Pin-Compatible 13-Bit Upgrades Available (MAX5130/MAX5131) Pin-Compatible 14-Bit Upgrades Available (MAX5170/MAX5172)

MAX5120, MAX5121: Functional Block Diagram Applications/Uses µP-Controlled Systems Automated Test Equipment (ATE) Digital Gain and Offset Control Industrial Process Controls Motion Control

DataSheet

Parametrics

Quality and Environmental Data

• MAX5121.pdf

Related Products

• MAX5122：+5V/+3V, 12-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference
• MAX5130：+3V/+5V, 13-Bit, Serial, Voltage-Output DACs with Internal Reference
• MAX5353：Low-Power, 12-Bit Voltage-Output DACs with Serial Interface
• MAX5352：Low-Power, 12-Bit Voltage-Output DACs with Serial Interface

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