Datasheet

DAC8718
DAC8718
ControlLogic
An ogal Monit ro
ToDAC-0,DAC-1,
DAC-2,DAC-3
ToDAC-0,DAC-1,
DAC-2,DAC-3
ToDAC-4,DAC-5,DAC-6,DAC-7
DAC8718
OFFSET-B
AGND-B
V -7
OUT
V
MON
OFFSET-A
AGND-A
REF-B
Reference
BufferB
InternalTrimming
Zero/Gain;INL
Reference
BufferA
OFFSET
DACA
OFFSET
DACB
DAC-0
Latch-0
Power-Up/
Power-Down
Control
(SameFunctionBlocks
forAllChannels)
REF-A
LDAC
RST
RSTSEL
LDAC
CLR
USB/BTC
AIN-0
AIN-1
GPIO-0
GPIO-1
GPIO-2
SDO
SDI
CS
SCLK
WAKEUP
SPIShiftRegister
IOV
DD
DGND DV
DD
AV
DD
AV
SS
DGND DV
DD
AV
DD
AV
SS
V -0
OUT
V -7
OUT
AIN-0
AIN-1
RefBufferA
RefBufferB
OFFSET-B
Mux
Command
Registers
InputData
Register0
Correction
Engine
(WhenCorrectionEngineDisabled)
DAC-0
Data
UserCalibration:
ZeroRegister0
GainRegsiter0
V -0
OUT
DAC8718
www.ti.com SBAS467A –MAY 2009–REVISED DECEMBER 2009
Octal, 16-Bit, Low-Power, High-Voltage Output, Serial Input
DIGITAL-TO-ANALOG CONVERTER
Check for Samples: DAC8718
1
FEATURES
DESCRIPTION
2345
• Bipolar Output: ±2V to ±16.5V
The DAC8718 is a low-power, octal, 16-bit
digital-to-analog converter (DAC). With a 5V
• Unipolar Output: 0V to +33V
reference, the output can either be a bipolar ±15V
• 16-Bit Resolution
voltage when operating from dual ±15.5V (or higher)
• Low Power: 14.4mW/Ch (Bipolar Supply)
power supplies, or a unipolar 0V to +30V voltage
• Relative Accuracy: 4 LSB Max when operating from a +30.5V (or higher) power
supply. With a 5.5V reference, the output can either
• Low Zero/Full-Scale Error
be a bipolar ±16.5V voltage when operating from dual
– Before User Calibration: ±10 LSB Max
±17V (or higher) power supplies, or a unipolar 0V to
– After User Calibration: ±1 LSB
+33V voltage when operating from a +33.5V (or
higher) power supply. This DAC provides low-power
• Flexible System Calibration
operation, good linearity, and low glitch over the
• Low Glitch: 4nV-s
specified temperature range of –40°C to +105°C. This
• Settling Time: 15μs
device is trimmed in manufacturing and has very low
zero-code and gain error. In addition, system level
• Channel Monitor Output
calibration can be performed to achieve ±1 LSB
• Programmable Gain: x4/x6
bipolar zero/full-scale error with bipolar supplies, or
• Programmable Offset
±1 LSB zero code/full-scale error with a unipolar
supply, over the entire signal chain. The output range
• SPI™: Up to 50MHz, 1.8V/3V/5V Logic
can be offset by using the DAC offset register.
• Schmitt Trigger Inputs
The DAC8718 features a standard, high-speed serial
• Daisy-Chain with Sleep Mode Enhancement
peripheral interface (SPI) that operates at up to
• Packages: QFN-48 (7x7mm), TQFP-64
50MHz and is 1.8V, 3V, and 5V logic compatible, to
(10x10mm)
communicate with a DSP or microprocessor. The
input data of the device are double-buffered. An
APPLICATIONS
asynchronous load input (LDAC) transfers data from
• Automatic Test Equipment
the DAC data register to the DAC latch. The
asynchronous CLR input sets the output of all eight
• PLC and Industrial Process Control
DACs to AGND. The V
MON
pin is a monitor output
• Communications
that connects to the individual analog outputs, the
offset DAC, the reference buffer outputs, and two
external inputs through a multiplexer (mux).
The DAC8718 is pin-to-pin and function-compatible
with the DAC8218 (14-bit) and the DAC7718 (12-bit).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2DSP is a trademark of Texas Instruments.
3SPI, QSPI are trademarks of Motorola Inc.
4Microwire is a trademark of National Semiconductor.
5All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.