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DAC7750IPWPR
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DAC7750IPWPR Programmierhandbuch

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GND
DACx750
AVDDDVDD-ENDVDD
Watchdog
Timer
Slew Rate
Control
User Calibration
Gain/Offset
Register
DAC Input
Register
Thermal
Alarm
Internal
Reference
SPI Shift Register
Input Control Logic
Control Logic
REFOUT
REFIN HART-IN
LATCH
SCLK
DIN
SDO
CLR
DAC
Pre-
Conditioning
Current
Source
I
ENABLE
ISET-R
I
GAIN
Current Output Stage
IOUT
ALARM
BOOST
R3-SENSE
Copyright © 2016, Texas Instruments Incorporated
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
DAC7750
,
DAC8750
SBAS538B DECEMBER 2013REVISED JUNE 2016
DACx750 Single-Channel, 12- and 16-Bit Programmable Current Output
Digital-to-Analog Converters for 4-mA to 20-mA Current Loop Applications
1
1 Features
1
Current Output Options:
0 mA to 24 mA
4 mA to 20 mA
0 mA to 20 mA
±0.1% FSR Typical Total Unadjusted Error (TUE)
DNL: ±1 LSB Maximum
Max Loop Compliance Voltage: AVDD 2 V
Internal 5-V Reference: 10 ppm/°C (Maximum)
Internal 4.6-V Power-Supply Output
CRC Frame Error Check
Watchdog Timer
Thermal Alarm
Open Circuit Alarm
Terminals to Monitor Output Current
On-Chip Fault Alarm
User-Calibration for Offset and Gain
Wide Temperature Range: –40°C to 125°C
6-mm × 6-mm 40-Pin VQFN and 24-Pin HTSSOP
Packages
2 Applications
4-mA to 20-mA Current Loops
Analog Output Modules
Building Automation
Environment Monitoring
Programmable Logic Controllers (PLCs)
Field Sensors and Process Transmitters
3 Description
The DAC7750 and DAC8750 are low-cost, precision,
fully-integrated 12-bit and 16-bit digital-to-analog
converters (DACs) designed to meet the
requirements of industrial process-control
applications. These devices can be programmed as a
current output with a range of 4 mA to 20 mA, 0 mA
to 20 mA, or 0 mA to 24 mA. The DAC7750 and
DAC8750 include reliability features such as CRC
error checking on the serial peripheral interface
(SPI™) frame, a watchdog timer, an open circuit,
compliance voltage, and thermal alarm. In addition,
the output current can be monitored by accessing an
internal precision resistor.
These devices include a power-on-reset function to
ensure that the device powers up in a known state
(IOUT is disabled and in a Hi-Z state). The CLR
terminal sets the current output to the low end of the
range if the output is enabled. Program the zero and
gain registers to digitally calibrate the device in the
end system. The output slew rate is also
programmable by register. These devices can
superimpose an external HART
®
signal on the current
output, and can operate with a 10-V to 36-V supply.
All versions are available in both 40-pin VQFN and
24-pin TSSOP packages.
Device Information(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
DACx750 HTSSOP (24) 7.80 mm × 4.40 mm
DACx750 VQFN (40) 6.00 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
Verzeichnis

DAC7750IPWPR Datenblatt-PDF

DAC7750IPWPR Datenblatt PDF
TI
25 Seiten, 966 KB
DAC7750IPWPR Programmierhandbuch
TI
53 Seiten, 3676 KB

DAC7750 Datenblatt-PDF

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DAC7750 Evaluation Module for 12Bit Programmable DAC with 4 to 20mA Current Output
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