AD5737_12 Datasheet, PDF (1/44 Pages) Analog Devices – Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output

Data Sheet
Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output
DAC with Dynamic Power Control and HART Connectivity
AD5737
FEATURES
12-bit resolution and monotonicity
Dynamic power control for thermal management
or external PMOS mode
Current output ranges: 0 mA to 20 mA, 4 mA to 20 mA,
and 0 mA to 24 mA
±0.1% total unadjusted error (TUE) maximum
User-programmable offset and gain
On-chip diagnostics
On-chip reference: ±10 ppm/°C maximum
−40°C to +105°C temperature range
APPLICATIONS
Process control
Actuator control
PLCs
HART network connectivity
GENERAL DESCRIPTION
The AD5737 is a quad-channel current output DAC that
operates with a power supply range from 10.8 V to 33 V.
On-chip dynamic power control minimizes package power
dissipation by regulating the voltage on the output driver from
7.4 V to 29.5 V using a dc-to-dc boost converter optimized for
minimum on-chip power dissipation.
Each channel has a corresponding CHART pin so that HART
signals can be coupled onto the current output of the AD5737.
The AD5737 uses a versatile 3-wire serial interface that operates
at clock rates of up to 30 MHz and is compatible with standard
SPI, QSPI™, MICROWIRE®, DSP, and microcontroller interface
standards. The serial interface also features optional CRC-8 packet
error checking, as well as a watchdog timer that monitors activity
on the interface.
PRODUCT HIGHLIGHTS
1. Dynamic power control for thermal management.
2. 12-bit performance.
3. Quad channel.
4. HART compliant.
COMPANION PRODUCTS
Product Family: AD5755, AD5755-1, AD5757, AD5735
HART Modem: AD5700, AD5700-1
External References: ADR445, ADR02
Digital Isolators: ADuM1410, ADuM1411
Power: ADP2302, ADP2303
Additional companion products on the AD5737 product page
FUNCTIONAL BLOCK DIAGRAM
AV _CC
5.0V
AV _DD
AGND +15V
SW_x
V_{BOOST_x}
DV_DD
DGND
LDAC
SCLK
SDIN
SYNC
SDO
CLEAR
FAULT
ALERT
AD1
AD0
REFOUT
REFIN
DIGITAL
INTERFACE
REFERENCE
AD5737
+
GAIN REG A
OFFSET REG A
DAC CHANNEL A
DAC CHANNEL B
DAC CHANNEL C
DAC CHANNEL D
DC-TO-DC
CONVERTER
7.4V TO 29.5V
DAC A
CURRENT
OUTPUT RANGE
SCALING
I_{OUT_x}
R_{SET_x}
CHARTx
NOTES
1. x = A, B, C, OR D.
Figure 1.
Rev. B
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