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DAC7718 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce DAC7718
Description  Octal, 12-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

DAC7718 Fiches technique(HTML) 1 Page - Texas Instruments

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DAC7718
DAC7718
An og
al
Monit r
o
ToDAC-0,DAC-1,
DAC-2,DAC-3
ToDAC-0,DAC-1,
DAC-2,DAC-3
ToDAC-4,DAC-5,DAC-6,DAC-7
DAC7718
OFFSET-B
AGND-B
V
-7
OUT
V
MON
OFFSET-A
AGND-A
REF-B
Reference
BufferB
InternalTrimming
Zero/Gain;INL
Reference
BufferA
OFFSET
DACA
OFFSET
DACB
DAC-0
Latch-0
Power-Up/
Power-Down
Control
(SameFunctionBlocks
forAllChannels)
REF-A
LDAC
RST
RSTSEL
LDAC
CLR
USB/BTC
AIN-0
AIN-1
GPIO-0
GPIO-1
GPIO-2
SDO
SDI
CS
SCLK
WAKEUP
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
RefBufferA
RefBufferB
OFFSET-B
Command
Registers
InputData
Register0
Correction
Engine
(WhenCorrectionEngineDisabled)
DAC-0
Data
UserCalibration:
ZeroRegister0
GainRegsiter0
V
-0
OUT
DAC7718
www.ti.com
SBAS361A – MAY 2009 – REVISED DECEMBER 2009
Octal, 12-Bit, Low-Power, High-Voltage Output, Serial Input
DIGITAL-TO-ANALOG CONVERTER
Check for Samples: DAC7718
1
FEATURES
DESCRIPTION
2345
• Bipolar Output: ±2V to ±16.5V
The
DAC7718
is
a
low-power,
octal,
12-bit
digital-to-analog
converter
(DAC).
With
a
5V
Unipolar Output: 0V to +33V
reference, the output can either be a bipolar ±15V
12-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: 1 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: ±1 LSB Max
be a bipolar ±16.5V voltage when operating from dual
Flexible System Calibration
±17V (or higher) power supplies, or a unipolar 0V to
Low Glitch: 4nV-s
+33V voltage when operating from a +33.5V (or
higher) power supply. This DAC provides low-power
Settling Time: 15ms
operation, good linearity, and low glitch over the
Channel Monitor Output
specified temperature range of –40°C to +105°C. This
Programmable Gain: x4/x6
device is trimmed in manufacturing and has very low
zero-code and gain error. In addition, system level
Programmable Offset
calibration can be performed over the entire signal
SPI™: Up to 50MHz, 1.8V/3V/5V Logic
chain. The output range can be offset by using the
Schmitt Trigger Inputs
DAC offset register.
Daisy-Chain with Sleep Mode Enhancement
The DAC7718 features a standard, high-speed serial
Packages: QFN-48 (7x7mm), TQFP-64
peripheral interface (SPI) that operates at up to
(10x10mm)
50MHz and is 1.8V, 3V, and 5V logic compatible, to
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
PLC and Industrial Process Control
asynchronous CLR input sets the output of all eight
Communications
DACs to AGND. The VMON pin is a monitor output
that connects to the individual analog outputs, the
offset DAC, the reference buffer outputs, and two
external inputs through a multiplexer (mux).
The DAC7718 is pin-to-pin and function-compatible
with the DAC8718 (16-bit) and the DAC8218 (14-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.
2
DSP is a trademark of Texas Instruments.
3
SPI, QSPI are trademarks of Motorola Inc.
4
Microwire is a trademark of National Semiconductor.
5
All 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.


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