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AD5522

Data Sheet

Rev. E | Page 18 of 64

Pin No.

Mnemonic

Description

MEASVH3

DUT Voltage Sense Input (High Sense) for Channel 3.

MEASVH1

DUT Voltage Sense Input (High Sense) for Channel 1.

GUARDIN1/

DUTGND1

Guard Amplifier Input for Channel 1/DUTGND Input for Channel 1. This dual function pin is configured via the

serial interface. The default function at power-on is GUARDIN1. If this pin is configured as a DUTGND input for

the channel, the input to the guard amplifier is internally connected to MEASVH1. For more information, see

the Device Under Test Ground (DUTGND) section and the Guard Amplifier section.

GUARD1

Guard Output Drive for Channel 1.

FOH1

Force Output for Internal Current Ranges (Channel 1).

EXTMEASIL1

Sense Input (Low Sense) for High Current Range (Channel 1).

EXTMEASIH1

Sense Input (High Sense) for High Current Range (Channel 1).

CCOMP1

Compensation Capacitor Input for Channel 1. See the Compensation Capacitors section.

CFF1

External Capacitor for Channel 1. This pin optimizes the stability and settling time performance of the force

amplifier when in force voltage mode. See the Compensation Capacitors section.

EXTFOH1

Force Output for High Current Range (Channel 1). Use an external resistor at this pin for current ranges up to

±80 mA. For more information, see the Current Range Selection section.

MEASOUT3

Multiplexed DUT Voltage, Current Sense Output, Temperature Sensor Voltage for Channel 3. This pin is

referenced to AGND.

MEASOUT2

Multiplexed DUT Voltage, Current Sense Output, Temperature Sensor Voltage for Channel 2. This pin is

referenced to AGND.

MEASOUT1

Multiplexed DUT Voltage, Current Sense Output, Temperature Sensor Voltage for Channel 1. This pin is

referenced to AGND.

MEASOUT0

Multiplexed DUT Voltage, Current Sense Output, Temperature Sensor Voltage for Channel 0. This pin is

referenced to AGND.

SYS_FORCE

External Force Signal Input. This pin enables the connection of the system PMU.

SYS_SENSE

External Sense Signal Output. This pin enables the connection of the system PMU.

REFGND

Accurate Analog Reference Input Ground.

VREF

Reference Input for DAC Channels (5 V for specified performance).

DUTGND

DUT Voltage Sense Input (Low Sense). By default, this input is shared among all four PMU channels. If a DUTGND

input is required for each channel, the user can configure the GUARDINx/DUTGNDx pins as DUTGND inputs for

each PMU channel.

SPI/LVDS

Interface Select Pin. Logic low selects SPI-compatible interface mode; logic high selects LVDS interface mode.

This pin has a pull-down current source (~350 μA). In LVDS interface mode, the CPOHx and CPOLx pins default

to differential interface pins.

CGALM

Open-Drain Output for Guard and Clamp Alarms. This open-drain pin provides shared alarm information

about the guard amplifier and clamp circuitry. By default, this output pin is disabled. The system control

can also choose to enable alarms for the guard amplifier, the clamp circuitry, or both. When this pin flags an

alarm, the origins of the alarm can be determined by reading back the alarm status register. Two flags per

channel in this word (one latched, one unlatched) indicate which function caused the alarm and whether the

alarm is still present.

TMPALM

Open-Drain Output for Temperature Alarm. This latched, active low, open-drain output flags a temperature

alarm to indicate that the junction temperature has exceeded the default temperature setting (130°C) or the

user programmed temperature setting. Two flags in the alarm status register (one latched, one unlatched)

indicate whether the temperature has dropped below 130°C or remains above 130°C. User action is required

to clear this latched alarm flag by writing to the clear bit (Bit 6) in any of the PMU registers.

RESET

Digital Reset Input. This active low, level sensitive input resets all internal nodes on the device to their power-

on reset values.

EXTFOH0

Force Output for High Current Range (Channel 0). Use an external resistor at this pin for current ranges up to

±80 mA. For more information, see the Current Range Selection section.

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