AD5522JSVDZ datasheet(13/45 Pages) AD

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Preliminary Technical Data

AD5522

Rev. PrL | Page 13 of 45

SDO

Serial data out, for readback and diagnostic purposes

CPOL2/CPO0

Comparator output Low, comparator window in LVDS interface mode

CPOH2/CPO1

Comparator output Low, comparator window in LVDS interface mode

CPOL3/CPO2

Comparator output Low, comparator window in LVDS interface mode

CPOH3/CPO3

Comparator output Low, comparator window in LVDS interface mode

66, 65, 64,

15, 16, 17,

MEASOUT(0-3)

Multiplexed DUT voltage/Current sense output/temperature sensor voltage per channel,

referenced to AGND.

SYS_FORCE

External FORCE signal input, enables connection of system PMU.

SYS_SENSE

External SENSE signal output, enables connection of system PMU.

REFGND

Accurate analog reference input ground.

VREF

Reference Input for DAC channels, 5V for specified performance.

SPI/LVDS

Interface select pin. Logic low selects SPI interface compatible mode, logic high selects

LVDS interface mode. In LVDS mode the CPOH(0-3) pins default to differential interface

pins.

CGALM

CGALM is an open drain pin providing shared Alarm information for Guard amplifier and

Clamp circuitry.

By default, this output pin is disabled. The System Control Register allows user to enable

this function and to set the open drain output as a latched output, or to configure either

the Guard or Clamp function or both flagging the alarm pin.

When this pin flags an alarm, the origins of the alarm may 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 if the alarm is still present.

TMPALM

The function of this pin is to flag a Temperature Alarm. It is a latched active low open drain

output indicating the junction temperature has exceeded either the programmed or

default (130degC) temperature setting.

Two flags in the Alarm Status Register (one latched, one unlatched) indicate if the

temperature has dropped below 130degC or still above. User action is required to clear this

latched alarm flag, by writing to the “CLEAR” bit in any of the PMU registers.

RESET

Active low, level sensitive input used to reset all internal nodes on the device to their

power-on reset value.

3, 18, 43, 58

78, 63, 38,

CCOMP(0-3)

Compensation capacitor Input per channel. See section on compensation capacitors..

2, 19, 42, 59

79, 62, 39,

CFF (0-3)

External capacitor optimizing the stability performance of the force amplifier (per

channel).. See section on Compensation Capacitors

80, 21, 40,

1, 60, 41,

EXTFOH(0-3)

Per channel, Force output for high current range. Use external resistor here for current

range up to 64mA.

6, 15, 46, 55

75, 66, 35,

FOH(0-3)

Per channel force output for all other ranges.

4, 17, 44, 57

77, 64, 37,

EXTMEASIH(0-3)

Per channel sense input (high sense) for high current range.

5, 16, 45, 56

76, 65, 36,

EXTMEASIL(0-3)

Per channel sense input (Low sense) for high current range.

9, 12, 49, 52

72, 69, 32,

MEASVH(0-3)

Per channel DUT voltage sense input (high sense)

DUTGND

DUT voltage sense input (low sense). By default, DUTGND is shared between all four PMU

channels. If user requires a DUTGND input per channel, the GUARDIN (0-3)/DUTGND(0-3)

pin may be configured to be a DUTGND input per each PMU channel.

7, 14 , 47, 54

74, 67, 34,

GUARD (0-3)

Guard output drive.

8, 13, 48, 53

73, 68, 33,

GUARDIN(0-3)

/DUTGND(0-3)

This pin has dual functionality; it may be either a Guard input per channel or DUTGND per

channel.

Its function is determined via the serial interface. The power on default is GUARDIN, where

it functions as the input to the Guard Amplifier. Alternatively, it may be configured to be a

DUTGND input per channel. If selected as DUTGND via the interface, it now provides a

DUTGND per Channel function and the input to the Guard amplifier is internally connected

to MEASVH. See section on Guard Amplifier

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