Datasheet

Data Sheet AD5522
Rev. E | Page 17 of 64
Pin No. Mnemonic Description
13 GUARDIN2/
DUTGND2
Guard Amplifier Input for Channel 2/DUTGND Input for Channel 2. This dual function pin is configured via the
serial interface. The default function at power-on is GUARDIN2. If this pin is configured as a DUTGND input for
the channel, the input to the guard amplifier is internally connected to MEASVH2. For more information, see
the Device Under Test Ground (DUTGND) section and the Guard Amplifier section.
14
GUARD2
Guard Output Drive for Channel 2.
15 FOH2 Force Output for Internal Current Ranges (Channel 2).
16 EXTMEASIL2 Sense Input (Low Sense) for High Current Range (Channel 2).
17 EXTMEASIH2 Sense Input (High Sense) for High Current Range (Channel 2).
18 CCOMP2 Compensation Capacitor Input for Channel 2. See the Compensation Capacitors section.
19 CFF2 External Capacitor for Channel 2. This pin optimizes the stability and settling time performance of the force
amplifier when in force voltage mode. See the Compensation Capacitors section.
21 EXTFOH2 Force Output for High Current Range (Channel 2). Use an external resistor at this pin for current ranges up to
±80 mA. For more information, see the Current Range Selection section.
22, 39, 62,
67, 79
AVSS Negative Analog Supply Voltage.
23
BUSY
Digital Input/Open-Drain Output. This pin indicates the status of the interface. See the
BUSY
and
LOAD
Functions section for more information.
24 SCLK Serial Clock Input, Active Falling Edge. Data is clocked into the shift register on the falling edge of SCLK. This
pin operates at clock speeds up to 50 MHz.
25 CPOL0/
SCLK
Comparator Output Low (Channel 0) for SPI Interface/Differential Serial Clock Input (Complement) for LVDS
Interface.
26 CPOH0/
SDI
Comparator Output High (Channel 0) for SPI Interface/Differential Serial Data Input (Complement) for LVDS
Interface.
27 SDI Serial Data Input for SPI or LVDS Interface.
28
SYNC
Active Low Frame Synchronization Input for SPI or LVDS Interface.
29 CPOL1/SYNC Comparator Output Low (Channel 1) for SPI Interface/Differential SYNC Input for LVDS Interface.
30 DGND Digital Ground Reference Point.
31 CPOH1/
SDO
Comparator Output High (Channel 1) for SPI Interface/Differential Serial Data Output (Complement) for LVDS
Interface.
32 SDO Serial Data Output for SPI or LVDS Interface. This pin can be used for data readback and diagnostic purposes.
33
LOAD
Logic Input (Active Low). This pin synchronizes updates within one device or across a group of devices. If
synchronization is not required,
LOAD
can be tied low; in this case, DAC channels and PMU modes are updated
immediately after
BUSY
goes high. See the
BUSY
and
LOAD
Functions section for more information.
34 DVCC Digital Supply Voltage.
35 CPOL2/CPO0 Comparator Output Low (Channel 2) for SPI Interface/Comparator Output Window (Channel 0) for LVDS
Interface.
36 CPOH2/CPO1 Comparator Output High (Channel 2) for SPI Interface/Comparator Output Window (Channel 1) for LVDS
Interface.
37 CPOL3/CPO2 Comparator Output Low (Channel 3) for SPI Interface/Comparator Output Window (Channel 2) for LVDS
Interface.
38 CPOH3/CPO3 Comparator Output High (Channel 3) for SPI Interface/Comparator Output Window (Channel 3) for LVDS
Interface.
40 EXTFOH3 Force Output for High Current Range (Channel 3). Use an external resistor at this pin for current ranges up to
±80 mA. For more information, see the Current Range Selection section.
42 CFF3 External Capacitor for Channel 3. This pin optimizes the stability and settling time performance of the force
amplifier when in force voltage mode. See the Compensation Capacitors section.
43 CCOMP3 Compensation Capacitor Input for Channel 3. See the Compensation Capacitors section.
44 EXTMEASIH3 Sense Input (High Sense) for High Current Range (Channel 3).
45 EXTMEASIL3 Sense Input (Low Sense) for High Current Range (Channel 3).
46 FOH3 Force Output for Internal Current Ranges (Channel 3).
47 GUARD3 Guard Output Drive for Channel 3.
48 GUARDIN3/
DUTGND3
Guard Amplifier Input for Channel 3/DUTGND Input for Channel 3. This dual function pin is configured via the
serial interface. The default function at power-on is GUARDIN3. If this pin is configured as a DUTGND input for
the channel, the input to the guard amplifier is internally connected to MEASVH3. For more information, see
the Device Under Test Ground (DUTGND) section and the Guard Amplifier section.