LOW-POWER 10- AND 12-BIT DACs USE I2C-COMPATIBLE INTERFACE
SUNNYVALE, CA-February 27, 2002-Maxim Integrated Products introduces the new 10-bit MAX5811 and 12-bit MAX5812 DACs that use a 2-wire I2C™-compatible serial interface. Each device comes with one of four factory-programmed slave addresses. A single external address pin sets the least- significant bit of the slave address, allowing up to eight of these devices to be hung from a single bus. The MAX5811/MAX5812 come in tiny 6-pin SOT23 packages and use less than 190µA supply current maximum, optimizing them for portable battery-powered equipment.
These new DACs operate on a single 2.7V to 5.5V supply voltage, typically consuming 0.65mW at 5V and 0.3mW at 3V. A power-down feature is available on both devices, which reduces typical current consumption to 0.3µA. The output is internally switched during power-down to a resistor network of 1kΩ or 100kΩ to ground, or high impedance.
The MAX5811/MAX5812 use VDD as their reference, allowing the widest dynamic output range. Also included is a power-on reset circuit to ensure the devices power up to 0V and remain there until a valid write takes place. An on-chip precision output buffer amplifier allows Rail-to-Rail® output swing with a 4µs settling time. Compatible with SMBus™ and I2C interface protocols, the fast 2-wire interface operates at speeds up to 400kHz.
Prices for the MAX5811/MAX5812 in 6-pin SOT23 packages start at $1.75 and $2.58, respectively (1000-up, FOB USA).
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