AD5755 datasheet(13/34 Pages) AD

13 / 34 page

Preliminary Technical Data

AD5755/AD5735

Rev. PrG | Page 13 of 34

Pin No. Mnemonic

Description

more information. When CLEAR is active, the DAC register cannot be written to.

ALERT

Active High Output. This pin is asserted when there has been no SPI activity on the interface pins for a

predetermined time. See features section for more information.

FAULT

Active Low Output. This pin is asserted low when an open circuit in current mode is detected or a short

circuit in voltage mode is detected or a PEC error is detected or an over temperature is detected (see

Features section). Open Drain Output.

POC

Power- On Condition. This pin determines the Power on Condition. If POC=’0’, the device is powered up

with the voltage and current channels in Tri-State mode. If POC=’1’, the device is powered up with a 30k Ω

pull down resistor to GND on the voltage output channel, and the current channels in Tri-State mode.

RESET

Hardware Reset. Active Low Input.

AVDD

Positive Analog Supply Pin. Voltage ranges from 10.8 V to 33 V.

COMPLV_A

Optional compensation capacitor connection for VOUT_A‘s output buffer. Connecting a 220 pF capacitor

between this pin and the VOUT_A pin allows the voltage output to drive up to 1 µF. It should be noted that

the addition of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.

−VSENSE_A

Sense connection for the negative voltage output load connection for VOUT_A. This pin must stay within

±3.0 V of ground for correct operation.

+VSENSE_A

Sense connection for the positive voltage output load connection for VOUT_A. This pin must stay within ±3.0

V of VOUT_A for correct operation.

COMPDCDC_A

DC-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the

feedback loop of channel A’s DC-DC converter.

VBOOST_A

Supply for channel A’s current output stage (See Figure 15). This is also the supply for the VOUT stage, which

is regulated to 15V by the DC-DC. To use the DC-DC feature of the device, connect as shown in Figure 20.

VOUT_A

Buffered Analog Output Voltage for DAC Channel A.

IOUT_A

Current Output Pin for DAC Channel A.

AVSS

Negative Analog Supply Pin. Voltage ranges from -10.8 V to -26.4 V.

COMPLV_B

Optional compensation capacitor connection for VOUT_B‘s output buffer. Connecting a 220 pF capacitor

between this pin and the VOUT_B pin allows the voltage output to drive up to1 µF. It should be noted that

the addition of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.

−VSENSE_B

Sense connection for the negative voltage output load connection for VOUT_B. This pin must stay within

±3.0 V of ground for correct operation.

+VSENSE_B

Sense connection for the positive voltage output load connection for VOUT_B. This pin must stay within ±3.0

V of VOUT_B for correct operation.

VOUT_B

Buffered Analog Output Voltage for DAC Channel B.

COMPDCDC_B

DC-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the

feedback loop of channel B’s DC-DC converter.

IOUT_B

Current Output Pin for DAC Channel B.

VBOOST_B

Supply for channel B’s current output stage (See Figure 15). This is also the supply for the VOUT stage, which

is regulated to 15V by the DC-DC. To use the DC-DC feature of the device, connect as shown in Figure 20.

AGND

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

SW_B

Switching output for Channel B’s DC-DC circuitry. To use the DC-DC feature of the device, connect as

shown in Figure 20.

GNDSW_B

Ground connection for DC-DC switching circuit. This pin should always be connected to GND.

GNDSW_A

Ground connection for DC-DC switching circuit. This pin should always be connected to GND.

SW_A

Switching output for Channel A’s DC-DC circuitry. To use the DC-DC feature of the device, connect as

shown in Figure 20.

AVSS

Negative Analog Supply Pin. Voltage ranges from -10.8 V to -26.4 V.

SW_D

Switching output for Channel D’s DC-DC circuitry. To use the DC-DC feature of the device, connect as

shown in Figure 20.

GNDSW_D

Ground connections for DC-DC switching circuit. This pin should always be connected to GND.

GNDSW_C

Ground connections for DC-DC switching circuit. This pin should always be connected to GND.

SW_C

Switching output for Channel C’s DC-DC circuitry. To use the DC-DC feature of the device, connect as

shown in Figure 20.

AVCC

Supply for DC-DC circuitry.

VBOOST_C

Supply for channel C’s current output stage (See Figure 15). This is also the supply for the VOUT stage, which

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