Information

Texas Instruments Signal Chain Guide 2013 | 85
Monitoring and Control
4-20 mA Transmitters
Get more information:
www.ti.com/product/DAC8760
Single-Channel 16-/12-Bit Programmable Current Output and Voltge Output DAC
for 4-mA to 20-mA Current Loop Applications
Functional block diagram
DAC8760/DAC7760
The DAC7760 and DAC8760 are low-cost, precision, fully-integrated 12-bit and 16-bit
digital-to-analog converters (DACs), and are designed to meet the requirements of
industrial process control applications. The output can be programmed as acurrent
output with range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA; or it can be
programmed as a voltage output with a range of 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V,
with a 10% over range.
Key Features
• Output current: 4-20 mA; 0-20 mA; 0-24 mA
•Voltageoutput:
0-5 V; 0 to 10 V; ±5 V; ±10 V
0-5.5 V; 0 to 11 V; ±5.5 V; ±11 V
(10% over range)
•

±0.1% FSR Total Unadjusted Error (TUE) max
•DNL:±1LSBmax
•Simultaneousvoltage/currentoutput
•Internal5Vreference(10ppm/°C,max)
•Internal4.5-Vpower-supplygenerator
•HART
®
compatible input
•
Wide temperature range: –40°C to +125°C
Applications
•4-mAto20-mAcurrentloops
•Analogoutputmodules
•Programmablelogiccontrollers(PLCs)
•Sensors/transducers
DAC
GND
DAC7760
DAC8760
AV
DD
DV
DD
-EN AV
SS
DV
DD
Pre-
Conditioning
Current
Source
I
ENABLE
ISET-R
I
GAIN
V
GAIN
V
ENABLE
Current Output Stage
Voltage Output Stage
Watchdog
Timer
Slew Rate
Control
User Calibration
Gain/Offset
Register
DAC Input
Register
Thermal
Shutdown
Internal
Reference
CMP
–V
SENSE
+V
SENSE
V
OUT
I
OUT
ALARM
BOOST
REFOUT
REFIN HART
IN
LATCH
SCLK
DIN
SDO
CLR
CLR-SEL
SPI Shift Register Input Control Logic
Control Logic
4-20 mA Transmitters and Receivers
Device Description
Sensor
Excitation
Loop
Voltage
(V)
Full-Scale
Input Range
Output
Range
(mA)
Additional
Power
Available
(V at mA)
HiRel
Avail. Package Price*
2-Wire, 4-20 mA Transmitters
XTR105 100 Ω RTD Conditioner with Linearization Two 800 µA 7.5 to 36 5 mV to 1 V 4-20 5.1 at 0.5 N DIP-14, SOIC-14 4.60
XTR106 Bridge Conditioner with Linearization 5 V and 2.5 V 7.5 to 36 5 mV to 1 V 4-20 5.1 at 1 N DIP-14, SOIC-14 4.00
XTR108 10 Ω to 10 kΩ RTD Conditioner, 6-Channel Input MUX,
Extra Op Amp Can Convert to Voltage Sensor Excitation,
Calibration Stored in External EEPROM
Two 500 µA 7.5 to 24 5 mV to 320 mV 4-20 5.1 at 2.1 N SSOP-24 3.35
XTR112 1 kΩ RTD Conditioner with Linearization Two 250 µA 7.5 to 36 5 mV to 1 V 4-20 5.05 at 1 N SOIC-14 4.00
XTR114 10 kΩ RTD Conditioner with Linearization Two 100 µA 7.5 to 36 5 mV to 1 V 4-20 5.05 at 1 N SOIC-14 4.00
XTR115 I
IN
to I
OUT
Converter, External Resistor Scales V
IN
to I
IN
V
REF
= 2.5 V 7.5 to 36 40 µA to 250 µA 4-20 4.9 at 1 N SOIC-8 1.25
XTR116 I
IN
to I
OUT
Converter, External Resistor Scales V
IN
to I
IN
V
REF
= 4.096 V 7.5 to 36 40 µA to 250 µA 4-20 4.9 at 1 N SOIC-8 1.05
XTR117 Current Loop, 7.5 to 40 V, 5 V Voltage Regulator V
REG
= 5 V 7.5 to 40 40 µA to 250 µA 4-20 4.9 at 1 N MSOP-8, DFN-8 0.90
Bridge Conditioner with Digital Calibration for Linearization, Span and Offset Over Temperature
PGA309 Complete Digitally Calibrated Bridge Sensor
Conditioner, Voltage Output, Calibration Stored in
External EEPROM, One-Wire/Two-Wire Interface
V
EXC
= V
S
,
2.5 V 4.096 V
2.7 to 5.5 1 mV/V to
245 mV/V
0.05 V-4.9 V
at V
S
= +5 V
— N TSSOP-16 2.95
PGA308 Single Supply, Auto-Zero, Sensor Amplifier with
Programmable Gain and Offset
— 2.7 to 5.5 0.2 V to 4.1 V 0.03 V to 5.44 mA
at V
S
= +5 V
— N MSOP-10,
DFN-10
2.00
Industrial Current/Voltage Drivers
DAC8760/
7760
16-/12-Bit Programmable Current and Voltage
Output DAC
— +10/–18
to 0/36
— 0-20, 4-20, 0-24, 0-5 V,
0-10 V, ±5 V, ±10 V
— N QFN-40,
TSSOP-24
3.99/
2.99
DAC8750/
DAC7750
16-/12-Bit Programmable Current Output DAC — +10/–18
to 0/36
— 0-20, 4-20, 0-24, 0-5 V,
0-10 V, ±5 V, ±10 V
— N QFN-40,
TSSOP-24
3.50/
2.49
XTR110 Precision V-to-I Converter/Transmitter, Selectable I/O
Ranges
V
REF
= 10 V 13.5 to 40 0 V to 5 V,
0 V to 10 V
0-20, 4-20
5-20
— N DIP-16, SOL-16 7.10
XTR111 Precision V-to-I Converter/Transmitter, Adjustable V
REG
3 V to 15 V
V
REG
= 3 to
15 V
8 to 40 0 V to 12 V 0-20, 4-20,
5-20
3 V to
15 V
N DFN/MSOP-10 1.10
XTR300 Industrial Analog Current/Voltage Output Driver — <34 V (–) +3 to
V (+) –3 Prog V
OUT
±17 V
±24 mA
— N 5x5
QFN/TSSOP-20
2.45
4-20mA Current Loop Receiver
RCV420 4-20 mA Input, 0 V to 5 V Output, 1.5 V Loop Drop V
REF
= 10 V +11.5/–5
to ±18
4-20 mA 0 V to 5 V — N DIP-16 3.55
*Suggested resale price in U.S. dollars in quantities of 1,000. See www.ti.com/hirel for HiRel options. Preview products are listed in bold blue.