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MAX521：Quad/Octal, 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs

Serial Interface Compatible with I²C and SMBus™

The MAX520/MAX521 are quad/octal, 8-bit voltage-output digital-to-analog converters (DACs) with simple 2-wire serial interfaces that allow communication between multiple devices. They operate from a single +5V supply and their reference input range includes both supply rails. The MAX521 includes rail-to-rail output buffer amplifiers for reduced system size and component count when driving loads. The MAX520's unbuffered voltage outputs reduce the device's total supply current to 4µA and provide increased accuracy at low output currents. The MAX520/MAX521 feature a serial interface and internal software protocol, allowing communication at data rates up to 400kbps. The interface, combined with the double-buffered input configuration, allows the DAC registers to be updated individually or simultaneously. In addition, the devices can be put into a low-power shutdown mode that reduces supply current to 4µA. Power-on reset ensures the DAC outputs are at 0V when power is initially applied. The MAX520 is available in 16-pin DIP and wide SO packages, as well as a space-saving 20-pin SSOP. The MAX521 comes in 20-pin DIP and 24-pin SO packages, as well as a space-saving 24-pin SSOP.

Key Features Single +5V Supply Simple 2-Wire Serial Interface I²C Compatible Outputs Swing Rail to Rail: Unbuffered Outputs (MAX520) Buffered Outputs (MAX521) 1%-Accurate Trimmed Output Resistance (MAX520A) Ultra-Low 4µA Supply Current (MAX520) Individual DACs Have Separate Reference Inputs Power-On Reset Clears All Latches 4µA Power-Down Mode

MAX520, MAX521: Typical Application Circuit Applications/Uses Digital Gain and Offset Control General Purpose Industrial Process Controls Programmable Attenuators

DataSheet

Parametrics

Quality and Environmental Data

• MAX521.pdf

Related Products

• MAX528：Octal, Serial, 8-Bit DAC with Output Buffers
• MAX534：+5V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers

Ordering Information