ADR435 AD [Analog Devices], ADR435 Datasheet - Page 13

• Manufacturer Part Number: ADR435
• Description: Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output
• Manufacturer: AD [Analog Devices]

Data Sheet
Pin No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Mnemonic
ALERT
FAULT
POC
RESET
AV
COMP
−V
+V
COMP
V
V
I
AV
COMP
−V
+V
V
COMP
I
V
AGND
SW
GNDSW
GNDSW
SW
AV
SW
GNDSW
GNDSW
SW
OUT_A
OUT_B
BOOST_A
OUT_A
OUT_B
BOOST_B
DD
SENSE_A
SENSE_A
SS
SENSE_B
SENSE_B
SS
B
A
D
C
LV_A
DCDC_A
LV_B
DCDC_B
B
A
D
C
Description
Active High Output. This pin is asserted when there is no SPI activity on the interface pins for a preset time.
For more information, see the Alert Output section.
Active Low, Open-Drain Output. This pin is asserted low when any of the following conditions is detected:
open circuit in current mode; short circuit in voltage mode; PEC error; or an overtemperature condition (see
the Fault Output section).
Power-On Condition. This pin determines the power-on condition and is read during power-on and 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 Pin. The voltage range is from 9 V to 33 V.
Optional Compensation Capacitor Connection for V
between this pin and the V
of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.
Sense Connection for the Negative Voltage Output Load Connection for V
±3.0 V of AGND for specified operation.
Sense Connection for the Positive Voltage Output Load Connection for V
between this pin and the V
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. For more information, see the DC-to-DC
Converter Compensation Capacitors section and the AI
Supply for Channel A Current Output Stage (see Figure 71). This pin is also the supply for the V
which is regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
Buffered Analog Output Voltage for DAC Channel A.
Current Output Pin for DAC Channel A.
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V.
Optional Compensation Capacitor Connection for V
between this pin and the V
of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.
Sense Connection for the Negative Voltage Output Load Connection for V
±3.0 V of AGND for specified operation.
Sense Connection for the Positive Voltage Output Load Connection for V
between this pin and the V
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. For more information, see the DC-to-DC
Converter Compensation Capacitors section and the AI
Current Output Pin for DAC Channel B.
Supply for Channel B Current Output Stage (see Figure 71). This pin is also the supply for the V
which is regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
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 converter, connect this pin as
shown in Figure 77.
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V.
Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
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 C DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
OUT_A
OUT_A
OUT_B
OUT_B
Rev. B | Page 13 of 48
pin allows the voltage output to drive up to 2 µF. Note that the addition
pin is added directly to the headroom requirement.
pin allows the voltage output to drive up to 2 µF. Note that the addition
pin is added directly to the headroom requirement.
OUT_A
OUT_B
CC
CC
Output Buffer. Connecting a 220 pF capacitor
Output Buffer. Connecting a 220 pF capacitor
Supply Requirements—Slewing section.
Supply Requirements—Slewing section.
OUT_A
OUT_B
OUT_A
OUT_B
. The difference in voltage
. The difference in voltage
. This pin must stay within
. This pin must stay within
OUT_B
OUT_A
AD5735
stage,
stage,