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AD5757

Rev. A | Page 11 of 44

Pin No.

Mnemonic

Description

ALERT

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.

FAULT

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.

RESET

Hardware Reset. Active Low Input.

AVDD

Positive Analog Supply. The voltage range is from 10.8 V to 33 V.

20, 25,

28, 30,

50, 52,

55, 60

No Connect. Do not connect to this pin.

CHARTA

HART Input Connection for DAC Channel A.

IGATEA

Optional Connection for External Pass Transistor. Should be left unconnected when using the dc-to-dc converter. See

the External PMOS Mode section for more information.

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 (see the DC-to-DC Converter Compensation

Capacitors and the AICC Supply Requirements—Slewing sections in the Device Features section for more

information).

VBOOST_A

Supply for Channel A Current Output Stage (see Figure 49). To use the dc-to-dc feature of the device, connect as

shown in Figure 56.

IOUT_A

Current Output Pin for DAC Channel A.

27, 40, 53

AGND

Ground Reference Point for Analog Circuitry. This must be connected to 0 V.

CHARTB

HART Input Connection for DAC Channel B.

IGATEB

Optional Connection for External Pass Transistor. Should be left unconnected when using the dc-to-dc converter.

See the External PMOS Mode section for more information.

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 (see the DC-to-DC Converter Compensation

Capacitors and AICC Supply Requirements—Slewing sections in the Device Features section for more

information).

IOUT_B

Current Output Pin for DAC Channel B.

VBOOST_B

Supply for Channel B Current Output Stage (see Figure 49). To use the dc-to-dc feature of the device, connect as

shown in Figure 56.

AGND

Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.

SWB

Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 56.

GNDSWB

Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.

GNDSWA

Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.

SWA

Switching Output for Channel A DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 56.

SWD

Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 56.

GNDSWD

Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.

GNDSWC

Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.

SWC

Switching Output for Channel C DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 56.

AVCC

Supply for DC-to-DC Circuitry.

VBOOST_C

Supply for Channel C Current Output Stage (see Figure 49). To use the dc-to-dc feature of the device, connect as

shown in Figure 56.

IOUT_C

Current Output Pin for DAC Channel C.

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 (see the DC-to-DC Converter Compensation

Capacitors and AICC Supply Requirements—Slewing sections in the Device Features section for more

information).

IGATEC

Optional Connection for External Pass Transistor. Should be left unconnected when using the dc-to-dc converter. See

the External PMOS Mode section for more information.

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