AD5737 Просмотр технического описания (PDF) - Analog Devices
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AD5737 Datasheet PDF : 44 Pages
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Data Sheet
AD5737
Pin No.
14
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
45
46
47
48
Mnemonic
CLEAR
ALERT
FAULT
DGND
RESET
AVDD
NC
CHARTA
IGATEA
COMPDCDC_A
VBOOST_A
NC
IOUT_A
AGND
NC
CHARTB
NC
IGATEB
COMPDCDC_B
IOUT_B
VBOOST_B
AGND
SWB
GNDSWB
GNDSWA
SWA
AGND
SWD
GNDSWD
GNDSWC
SWC
AVCC
VBOOST_C
IOUT_C
COMPDCDC_C
Description
Active High, Edge Sensitive Input. When this pin is asserted, the output current is set to the programmed
clear code bit setting. Only channels enabled to be cleared are cleared. For more information, see the
Asynchronous Clear section. When CLEAR is active, the DAC output register cannot be written to.
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, PEC error, or an overtemperature condition (see the Fault Output section).
Digital Ground.
Hardware Reset, Active Low Input.
Positive Analog Supply Pin. The voltage range is from 9 V to 33 V.
No Connect. Do not connect to this pin.
HART Input Connection for DAC Channel A. For more information, see the HART Connectivity section.
Optional Connection for External Pass Transistor. Leave this pin unconnected when using the dc-to-dc
converter. For more information, see the External PMOS Mode section.
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 AICC Supply Requirements—Slewing section.
Supply for Channel A Current Output Stage (see Figure 48). To use the dc-to-dc converter, connect this pin
as shown in Figure 55.
No Connect. Do not connect to this pin.
Current Output Pin for DAC Channel A.
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
No Connect. Do not connect to this pin.
HART Input Connection for DAC Channel B. For more information, see the HART Connectivity section.
No Connect. Do not connect to this pin.
Optional Connection for External Pass Transistor. Leave this pin unconnected when using the dc-to-dc
converter. For more information, see the External PMOS Mode section.
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 AICC Supply Requirements—Slewing section.
Current Output Pin for DAC Channel B.
Supply for Channel B Current Output Stage (see Figure 48). To use the dc-to-dc converter, connect this pin
as shown in Figure 55.
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 55.
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 55.
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 55.
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 55.
Supply for DC-to-DC Circuitry. The voltage range is from 4.5 V to 5.5 V.
Supply for Channel C Current Output Stage (see Figure 48). To use the dc-to-dc converter, connect this pin
as shown in Figure 55.
Current Output Pin for DAC Channel C.
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel C 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 AICC Supply Requirements—Slewing section.
Rev. B | Page 11 of 44
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