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Data Sheet
Multiple Range, 16-/12-Bit, Bipolar/Unipolar Voltage Output DACs with 2 ppm/°C Reference
AD5761R/AD5721R
FEATURES
GENERAL DESCRIPTION
8 software-programmable output ranges: 0 V to 5 V, 0 V to 10 V, 0 V to 16 V, 0 V to 20 V, ±3 V, ±5 V, ±10 V, and −2.5 V to +7.5 V; 5% overrange
Low drift 2.5 V reference: ±2 ppm/°C typical Total unadjusted error (TUE): 0.1% FSR maximum 16-bit accuracy: ±2 LSB maximum Guaranteed monotonicity: ±1 LSB maximum Single channel, 16-/12-bit DACs Settling time: 7.5 μs typical Integrated reference buffers Low noise: 35 nV/√Hz Low glitch: 1 nV-sec (0 V to 5 V range) 1.7 V to 5.5 V digital supply range Asynchronous updating via LDAC Asynchronous RESET to zero scale/midscale DSP-/microcontroller-compatible serial interface Robust 4 kV HBM ESD rating 16-lead, 3 mm × 3 mm LFCSP package 16-lead TSSOP package Operating temperature range: −40°C to +125°C
APPLICATIONS
The AD5761R/AD5721R are single channel, 16-/12-bit serial input, voltage output, digital-to-analog converters (DACs). They operate from single supply voltages from 4.75 V to 30 V or dual supply voltages from −16.5 V to 0 V VSS and 4.75 V to 16.5 V VDD. The integrated output amplifier, reference buffer, and reference provide a very easy to use, universal solution.
The devices offer guaranteed monotonicity, integral nonlinearity (INL) of ±2 LSB maximum, 35 nV/√Hz noise, and 7.5 μs settling time on selected ranges.
The AD5761R/AD5721R use a serial interface that operates at clock rates of up to 50 MHz and are compatible with DSP and microcontroller interface standards. Double buffering allows the asynchronous updating of the DAC output. The input coding is user-selectable twos complement or straight binary. The asynchronous reset function resets all registers to their default state. The output range is user selectable, via the RA[2:0] bits in the control register.
The devices available in a 3 mm × 3 mm LFCSP package and a 16-lead TSSOP package offer guaranteed specifications over the −40°C to +125°C industrial temperature range.
Industrial automation Instrumentation, data acquisition Open-/closed-loop servo control, process control Programmable logic controllers
FUNCTIONAL BLOCK DIAGRAM
VDD
VREFIN/VREFOUT
DVCC ALERT
SDI SCLK
SYNC SDO
RESET
CLEAR
AD5761R/AD5721R
2.5V REFERENCE
REFERENCE BUFFERS
INPUT SHIFT REGISTER AND CONTROL LOGIC
12/16
INPUT REG
DAC 12/16 REG
12-BIT/ 16-BIT DAC
NOTES
DNC
DGND VSS
LDAC
AGND
1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 1.
VOUT
0V TO 5V 0V TO 10V 0V TO 16V 0V TO 20V ±3V ±5V ±10V −2.5V TO +7.5V
12355-001
Rev. A
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