True 18-Bit, Voltage Output DAC
0.5 LSB INL, 0.5 LSB DNL
Data Sheet
AD5781
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
V
V
V
CC
DD
REFPF REFPS
Single 18-bit DAC, 0.5 LSB INL
7.5 nV/√Hz noise spectral density
0.05 LSB long-term linearity stability
<0.05 ppm/°C temperature drift
1 µs settling time
1.4 nV-sec glitch impulse
Operating temperature range: −40°C to +125°C
20-lead TSSOP package
6.8kΩ 6.8kΩ
R1
AD5781
A1
R
IOV
CC
FB
R
FB
INV
SDIN
SCLK
SYNC
SDO
INPUT
SHIFT
18
18
18-BIT
DAC
DAC
REG
V
OUT
REGISTER
AND
CONTROL
LOGIC
6kΩ
LDAC
Wide power supply range of up to 16.5 V
35 MHz Schmitt triggered digital interface
1.8 V compatible digital interface
CLR
POWER-ON-RESET
AND CLEAR LOGIC
RESET
DGND
V
AGND
V V
REFNF REFNS
APPLICATIONS
SS
Figure 1.
Medical instrumentation
Test and measurement
Industrial control
Table 1. Complementary Devices
Part No.
Description
Scientific and aerospace instrumentation
Data acquisition systems
Digital gain and offset adjustment
Power supply control
AD8675
Ultraprecision, 36 V, 2.8 nV/√Hz rail-to-rail
output op amp
Ultraprecision, 36 V, 2.8 nV/√Hz dual rail-to-
rail output op amp
AD8676
ADA4898-1
High voltage, low noise, low distortion, unity
gain stable, high speed op amp
Table 2. Related Devices
Part No.
Description
AD5791
20-bit, 1 ppm accurate DAC
AD5541A/AD5542A 16-bit, 1 LSB accurate 5 V DAC
GENERAL DESCRIPTION
The AD57811 is a single 18-bit, unbuffered voltage output DAC
that operates from a bipolar supply of up to 33 V. The AD5781
accepts a positive reference input range of 5 V to VDD − 2.5 V and
a negative reference input range of VSS + 2.5 V to 0 V. The
AD5781 offers a relative accuracy specification of 0.5 LSB
maximum, and operation is guaranteed monotonic with a 0.5
LSB DNL maximum specification.
PRODUCT HIGHLIGHTS
1. True 18-Bit Accuracy.
2. Wide Power Supply Range of Up to 16.5 V.
3. −40°C to +125°C Operating Temperature Range.
4. Low 7.5 nV/√Hz Noise.
5. Low 0.05 ppm/°C Temperature Drift.
The part uses a versatile 3-wire serial interface that operates at
clock rates of up to 35 MHz and is compatible with standard
SPI, QSPI™, MICROWIRE™, and DSP interface standards. The
part incorporates a power-on reset circuit that ensures that the
DAC output powers up to 0 V and in a known output impedance
state and remains in this state until a valid write to the device
takes place. The part provides an output clamp feature that
places the output in a defined load state.
1 Protected by U.S. Patent No 7884747, and other patents are pending.
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2010–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com