Per Pin Parametric
Measurement Unit/Source Measure Unit
AD5520
FEATURES
GENERAL DESCRIPTION
Force/measure functions
FIMV, FVMI, FVMV, FIMI, FNMV
Force/measure voltage range 11 V
4 user programmable force/measure current ranges
4 ꢀA, 40 ꢀA, 400 ꢀA, 4 mA (external resistors)
2 user programmable extended current ranges
Up to 6 mA without external driver
Higher currents with external driver
Clamp circuitry and window comparators on board
Guard amplifier
The AD5520 is a single-channel, per pin parametric measure-
ment unit (PPMU) for use in semiconductor automatic
test equipment. The part is also suited for use as a source
measurement unit for instrumentation applications. It
contains programmable modes to force a pin voltage and
measure the corresponding current, or force a current and
measure the voltage. The AD5520 can force/measure over a
±±± ꢀ range or user-programmable currents up to ±ꢁ mA
with its on-board force amplifier. An external amplifier is
required for wider current ranges. The device provides a force
sense capability to ensure accuracy at the tester pin. A guard
output is also available to drive the shield of a force/sense pair.
The AD5520 is available in a 6ꢁ-lead LQFP package.
64-lead LQFP package
APPLICATIONS
Automatic test equipment
Per pin PMU, shared pin PMU, device power supply
instrumentation
Source measure, parametric measurement,
precision measurement
FUNCTIONAL BLOCK DIAGRAM
AV
EE
AV
CC
AD5520
FOH
BW SELECT
FOH3
FOH2
FOH1
FOH0
FIN
MEASI5H
CLAMP
DETECT
MEASI4H
MEASI3H
MEASI2H
MEASI1H
CLH
CLL
MEASI0H
REFGND
G = 16
MEASIOUT
MEASIL
I
SENSE
INST AMP
GUARDIN
GUARD
V
MEASOUT
SENSE
G = 1
INST AMP
MEASVH
MEASVL
G = 1
MEASVOUT
COMPARATOR
CPH
CPOH
AGND
QM5
LOGICS
CPOL
CPL
QM4
CPCK
Figure 1.
Rev. B
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