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ADP2303 bảng dữ liệu(PDF) 11 Page - Analog Devices

tên linh kiện ADP2303
Giải thích chi tiết về linh kiện  Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output
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Data Sheet
AD5737
Rev. B | Page 11 of 44
Pin No.
Mnemonic
Description
14
CLEAR
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.
15
ALERT
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.
16
FAULT
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).
17
DGND
Digital Ground.
18
RESET
Hardware Reset, Active Low Input.
19
AVDD
Positive Analog Supply Pin. The voltage range is from 9 V to 33 V.
20
NC
No Connect. Do not connect to this pin.
21
CHARTA
HART Input Connection for DAC Channel A. For more information, see the HART Connectivity section.
22
IGATEA
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.
23
COMPDCDC_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. For more information, see the DC-to-DC
Converter Compensation Capacitors section and the AICC Supply Requirements—Slewing section.
24
VBOOST_A
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.
25
NC
No Connect. Do not connect to this pin.
26
IOUT_A
Current Output Pin for DAC Channel A.
27
AGND
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
28
NC
No Connect. Do not connect to this pin.
29
CHARTB
HART Input Connection for DAC Channel B. For more information, see the HART Connectivity section.
30
NC
No Connect. Do not connect to this pin.
31
IGATEB
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.
32
COMPDCDC_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 AICC Supply Requirements—Slewing section.
33
IOUT_B
Current Output Pin for DAC Channel B.
34
VBOOST_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.
35
AGND
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
36
SWB
Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 55.
37
GNDSWB
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
38
GNDSWA
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
39
SWA
Switching Output for Channel A DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 55.
40
AGND
Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
41
SWD
Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 55.
42
GNDSWD
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
43
GNDSWC
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
44
SWC
Switching Output for Channel C DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 55.
45
AVCC
Supply for DC-to-DC Circuitry. The voltage range is from 4.5 V to 5.5 V.
46
VBOOST_C
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.
47
IOUT_C
Current Output Pin for DAC Channel C.
48
COMPDCDC_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.



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