True Accuracy, 16-Bit ±12 V/±15 V,
Serial Input Voltage Output DAC
AD5570
FEATURES
FUNCTIONAL BLOCK DIAGRAM
VSS
VDD
DGND
AD5570
POWER-ON
RESET
REFGND
2R
16-BIT
DAC
VOUT
AGND
R
AGNDS
R
DAC REGISTER
REFIN
POWER-DOWN
CONTROL LOGIC
SHIFT REGISTER
LDAC
SDIN
SCLK
SYNC
SDO
CLR
PD
03760-001
Full 16-bit performance
1 LSB maximum INL and DNL
Output voltage range up to ±14 V
On-board reference buffers, eliminating the need for a
negative reference
Controlled output during power-on
Temperature ranges of −40°C to +85°C for A/B version/−40°C
to +125°C for W/Y version
Settling time of 10 μs to 0.003%
Clear function to 0 V
Asynchronous update of outputs (LDAC pin)
Power-on reset
Serial data output for daisy chaining
Data readback facility
5 kV HBM ESD classification
Figure 1.
APPLICATIONS
Industrial automation
Automatic test equipment
Process control
Data acquisition systems
General-purpose instrumentation
GENERAL DESCRIPTION
The AD5570 is a single 16-bit serial input, voltage output DAC
that operates from supply voltages of ±11.4 V up to ±16.5 V.
Integral linearity (INL) and differential nonlinearity (DNL) are
accurate to 1 LSB. During power-up, when the supply voltages
are changing, VOUT is clamped to 0 V via a low impedance path.
The AD5570 DAC comes complete with a set of reference
buffers. The reference buffers allow a single, positive reference
to be used. The voltage on REFIN is gained up and inverted
internally to give the positive and negative reference for the
DAC core. Having the reference buffers on-chip eliminates the
need for external components such as inverters, precision
amplifiers, and resistors, thereby reducing the overall solution
size and cost.
The AD5570 uses a versatile 3-wire interface that is compatible
with SPI®, QSPI™, MICROWIRE™, and DSP® interface standards.
Data is presented to the part as a 16-bit serial word. Serial data
is available on the SDO pin for daisy-chaining purposes. Data
readback allows the user to read the contents of the DAC
register via the SDO pin.
Features on the AD5570 include LDAC which is used to update
the output of the DAC. The device also has a power-down pin
(PD), allowing the DAC to be put into a low power state, and a
CLR pin that allows the output to be cleared to 0 V.
The AD5570 is available in a 16-lead SSOP.
PRODUCT HIGHLIGHTS
1.
1 LSB maximum INL and DNL.
2.
Buffered voltage output up to ±14 V.
3.
Output controlled during power-up.
4.
On-board reference buffers.
5.
Wide temperature range of −40°C to +125°C.
6.
5 kV HBM ESD classification.
Rev. C
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 from its 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 and registered trademarks 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
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.
