EVAL-AD5750EBZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD5750EBZ' PDF : 36 Pages View PDF
Data Sheet
AD5750/AD5750-1/AD5750-2
THEORY OF OPERATION
The AD5750/AD5750-1/AD5750-2 are single-channel, precision
voltage/current output drivers with hardware- or software-
programmable output ranges. The software ranges are configured
via an SPI-/MICROWIRE-compatible serial interface. The analog
input to the AD5750/AD5750-1/AD5750-2 is provided from a
low voltage, single-supply DAC and is internally conditioned to
provide the desired output current/voltage range. Analog input
ranges available are 0 V to 2.5 V (AD5750-1/AD5750-2) or 0 V
to 4.096 V (AD5750).
The output current range is programmable across five current
ranges: +4 mA to +20 mA, 0 mA to +20 mA, 0 mA to +24 mA,
±20 mA, and ±24 mA.
The voltage output is provided from a separate pin that can be
configured to provide 0 V to +5 V, 0 V to +10 V, ±5 V, or ±10 V
output ranges. An overrange of 20% is available on the voltage
ranges. An overrange of 2% is available on the 4 mA to 20 mA,
0 mA to 20 mA, and 0 mA to 24 mA current ranges. The current
and voltage outputs are available on separate pins. Only one
output can be enabled at one time. The output range is selected
by programming the R3 to R0 bits in the control register (see
Table 7 and Table 8).
Figure 51 and Figure 52 show a typical configuration of the
AD5750/AD5750-1/AD5750-2 in software mode and in hardware
mode, respectively, in an output module system. The HW SELECT
pin selects whether the part is configured in software or hardware
mode. The analog input to the AD5750/AD5750-1/AD5750-2 is
provided from a low voltage, single-supply DAC, such as the
AD506x or AD566x, which provides an output range of 0 V to
4.096 V. The supply and reference for the DAC, as well as the
reference for the AD5750/AD5750-1/AD5750-2, can be supplied
from a reference such as the ADR392. The AD5750/AD5750-1/
AD5750-2 can operate from supplies up to ±26.4 V.
SOFTWARE MODE
In current mode, software-selectable output ranges include
±20 mA, ±24 mA, 0 mA to +20 mA, +4 mA to +20 mA, and
0 mA to +24 mA.
In voltage mode, software-selectable output ranges include 0 V
to +5 V, 0 V to +10 V, ±5 V, and ±10 V.
VDD AGND VSS
MCU
ADP1720
ADR392
VDD REFIN
SCLK
SDI/DIN
SDO
SYNC1
AD506x
AD566x
AD5750/
AD5750-1/
AD5750-2
VREF
VIN
SCLK
SDIN
SDO
SYNC
SERIAL
INTERFACE
AVDD GND AVSS
VSENSE+
VSENSE–
VOUT
RANGE
SCALE
VOUT
0V TO +5V, 0V TO +10V,
±5V, ±10V
IOUT
RANGE
SCALE
VOUT SHORT FAULT
IOUT OPEN FAULT
OVERTEMP FAULT
IOUT
0mA TO +20mA,
0mA TO +24mA,
+4mA TO +20mA
±20mA, ±24mA
STATUS REGISTER
HW SELECT
FAULT
Figure 51. Typical System Configuration in Software Mode (Pull-Up Resistors Not Shown for Open-Drain Outputs)
Rev. D | Page 23 of 36
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