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GENERAL DESCRIPTION

The AD5380 is a complete, single-supply, 40-channel, 14-bit denseDAC? available in a 100-lead LQFP package. All 40 channels have an on-chip output amplifier with rail-to-rail operation. The AD5380 includes a programmable internal 1.25 V/2.5 V, 10 ppm/°C reference, an on-chip channel monitor function that multiplexes the analog outputs to a common MON_OUT pin for external monitoring, and an output amplifier boost mode that allows optimization of the amplifier slew rate. The AD5380 contains a double-buffered parallel interface that features a 20 ns WR pulse width, an SPI-, QSPI-, -MICROWIRE, -DSP compatible serial interface with interface speeds in excess of 30 MHz, and an I2C-compatible interface that supports a 400 kHz data transfer rate.

FEATURES

Guaranteed monotonic

INL error: ±4 LSB max

On-chip 1.25 V/2.5 V, 10 ppm/°C reference

Temperature range: –40°C to +85°C

Rail-to-rail output amplifier

Power down

Package type: 100-lead LQFP (14 mm × 14 mm)

User interfaces

Parallel

Serial (SPI?-, QSPI?-, MICROWIRE?-, DSP-compatible,

featuring data readback)

I2C?-compatible

Robust 6.5 kV HBM and 2 kV FICDM ESD rating

INTEGRATED FUNCTIONS

Channel monitor

Simultaneous output update via LDAC

Clear function to user programmable code

Amplifier boost mode to optimize slew rate

User programmable offset and gain adjust

Toggle mode enables square wave generation

Thermal monitor

APPLICATIONS

Variable optical attenuators (VOA)

Level setting (ATE)

Optical micro-electro-mechanical systems (MEMS)

Control systems

Instrumentation