AD5755_11 Datasheet, PDF (13/48 Pages) Analog Devices – Quad Channel, 16-Bit, Serial Input, 4 mA to 20 mA and Voltage Output DAC, Dynamic Power Control

AD5755
Pin No. Mnemonic
15
ALERT
16
FAULT
17
POC
18
RESET
19
AVDD
20
COMPLV_A
21
−VSENSE_A
22
+VSENSE_A
23
COMPDCDC_A
24
VBOOST_A
25
VOUT_A
26
IOUT_A
27
AVSS
28
COMPLV_B
29
−VSENSE_B
30
+VSENSE_B
31
VOUT_B
32
COMPDCDC_B
33
IOUT_B
34
VBOOST_B
35
AGND
36
SWB
37
GNDSWB
38
GNDSWA
39
SWA
40
AVSS
41
SWD
42
GNDSWD
43
GNDSWC
Description
Active High Output. This pin is asserted when there has been no SPI activity on the interface pins for a
predetermined time. See the Device Features section for more information.
Active Low Output. This pin is asserted low when an open circuit in current mode is detected, a short circuit in
voltage mode is detected, a PEC error is detected, or an overtemperature is detected (see the Device Features
section). Open-drain output.
Power-On Condition. This pin determines the power-on condition and is read during power-on or, alternatively,
after a device reset. If POC = 0, the device is powered up with the voltage and current channels in tristate mode.
If POC = 1, the device is powered up with a 30 kΩ pull-down resistor to ground on the voltage output channel,
and the current channel is in tristate mode.
Hardware Reset, Active Low Input.
Positive Analog Supply. The voltage range is from 9 V to 33 V.
Optional Compensation Capacitor Connection for VOUT_A Output Buffer. Connecting a 220 pF capacitor between
this pin and the VOUT_A pin allows the voltage output to drive up to 2 μF. Note that the addition of this capacitor
reduces the bandwidth of the output amplifier, increasing the settling time.
Sense Connection for the Negative Voltage Output Load Connection for VOUT_A. This pin must stay within ±3.0 V
of AGND for specified operation.
Sense Connection for the Positive Voltage Output Load Connection for VOUT_A.
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel A dc-to-dc converter. Alternatively, if using an external compensation resistor,
place a resistor in series with a capacitor to ground from this pin (see the DC-to-DC Converter Compensation
Capacitors and the AICC Supply Requirements—Slewing sections in the Device Features section for more
information).
Supply for Channel A Current Output Stage (see Figure 72). This is also the supply for the VOUT_x stage, which is
regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc feature of the device, connect as shown in
Figure 78.
Buffered Analog Output Voltage for DAC Channel A.
Current Output Pin for DAC Channel A.
Negative Analog Supply Pin. Voltage range is from −10.8 V to −26.4 V.
Optional Compensation Capacitor Connection for VOUT_B Output Buffer. Connecting a 220 pF capacitor between
this pin and the VOUT_B pin allows the voltage output to drive up to 2 μF. Note that the addition of this capacitor
reduces the bandwidth of the output amplifier, increasing the settling time.
Sense Connection for the Negative Voltage Output Load Connection for VOUT_B. This pin must stay within ±3.0 V
of AGND for specified operation.
Sense Connection for the Positive Voltage Output Load Connection for VOUT_B.
Buffered Analog Output Voltage for DAC Channel B.
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel B dc-to-dc converter. Alternatively, if using an external compensation resistor,
place a resistor in series with a capacitor to ground from this pin (see the DC-to-DC Converter Compensation
Capacitors and the AICC Supply Requirements—Slewing sections in the Device Features section for more
information).
Current Output Pin for DAC Channel B.
Supply for Channel B Current Output Stage (see Figure 72). This is also the supply for the VOUT_x stage, which is
regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc feature of the device, connect as shown in
Figure 78.
Ground Reference Point for Analog Circuitry. This must be connected to 0 V.
Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown
in Figure 78.
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
Switching Output for Channel A DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown
in Figure 78.
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V. This pin can be connected to 0 V if
using the device in unipolar supply mode.
Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown
in Figure 78.
Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.
Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.
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