The MAX5811 is a single, 10-bit voltage-output digital-toanalog
converter (DAC) with an I2C?-compatible 2-wire
interface that operates at clock rates up to 400kHz. The
device operates from a single 2.7V to 5.5V supply and
draws only 100μA at VDD = 3.6V. A low-power powerdown
mode decreases current consumption to less than
1μA. The MAX5811 features three software-selectable
power-down output impedances: 100kΩ, 1kΩ, and high
impedance. Other features include an internal precision
Rail-to-Rail? output buffer and a power-on reset (POR)
circuit that powers up the DAC in the 100kΩ power-down
mode.
The MAX5811 features a double-buffered I2C-compatible
serial interface that allows multiple devices to share a single
bus. All logic inputs are CMOS-logic compatible and
buffered with Schmitt triggers, allowing direct interfacing
to optocoupled and transformer-isolated interfaces. The
MAX5811 minimizes digital noise feedthrough by disconnecting
the clock (SCL) signal from the rest of the device
when an address mismatch is detected.
The MAX5811 is specified over the extended temperature
range of -40°C to +85°C and is available in a space-saving
6-pin SOT23 package. Refer to the MAX5812 data
sheet for the 12-bit version.
Applications
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Operated Equipment