1FEATURES

2345· Bipolar Output: Up to ±16V

· Unipolar Output: 0V to +20V

· 16-Bit Monotonic

· Relative Accuracy: 1 LSB Max

· Low Zero and Gain Errors

– Before User Calibration: 4 LSB

– After User Calibration:

0.125 LSB Zero Error, 1 LSB Gain Error

· Low Noise: 60nV/√Hz

· Settling Time: 6ms

· Configurable Gain: x2/x4

· Analog Output Monitor

· Power-Down Mode

· SPI™: Up to 50MHz, 1.8V/3V/5V Logic

· Daisy-Chain Mode

· Operating Temperature: –40°C to +105°C

· Packages: QFN-40 (6x6mm), TQFP-48 (7x7mm)

APPLICATIONS

· Automatic Test Equipment

· Instrumentation

· Industrial Process Control

· Communications

DESCRIPTION

The DAC8734 is a high-accuracy, quad-channel,

16-bit digital-to-analog converter (DAC) that operates

from supply voltages of ±5V to ±18V in bipolar output mode, and from ±5V to +24V/–12V in unipolar mode.

With a 5V reference, the DAC8734 can be configured

to output ±10V, ±5V, 0V to 20V, or 0V to 10V. The

DAC8734 provides 16-bit monotonicity, excellent

integral nonlinearity (INL) error of ±1 LSB, low glitch,

and low noise over the operating temperature range

of –40°C to +105°C. This device is trimmed in

production for very low zero and gain errors. In

addition, the DAC8734 implements a

user-programmable system-level calibration function

to achieve ±0.125 LSB zero error and ±1 LSB gain

error.

The DAC8734 has integrated reference buffers and

output buffers. It features a standard high-speed

1.8V, 3V, or 5V serial peripheral interface (SPI) that

operates at clock rates of up to 50MHz to

communicate with a DSP or microprocessor. The four

DAC channels and the auxiliary registers are

addressed with four address bits. The device features

double-buffered interface logic for simultaneous

updates of all DACs. An asynchronous load input

(LDAC) transfers data from the input data register to the DAC latch, and the contents of the DAC latch set

the output voltage. The asynchronous RST input sets

the output of all four DACs to 0V. The VMON pin is an

analog monitor output that multiplexes the individual

DAC outputs or the AIN pin.

The DAC8734 is pin-compatible with the DAC8234

(14-bit) and the DAC7716 (12-bit).