Datasheet

AD5560 Data Sheet
Rev. D | Page 60 of 68
REQUIRED EXTERNAL COMPONENTS
The minimum required external components are shown in the
block diagram in Figure 60. Decoupling is very dependent on
the type of supplies used, the board layout, and the noise in the
system. It is possible that less decoupling may be required as a
result. Although there are four compensation input pins and
five feedforward capacitor input pins, all capacitor inputs may
be used only if the user intends to drive large variations of DUT
load capacitances. If the DUT load capacitance is known and
doesn’t change for all combinations of voltage ranges and test
conditions, then it is possible only one set of C
Cx
and C
Fx
is
required.
SHARED
ADC
ADC
V
REF
AV
SS
AV
DD
VREFDV
CC
KELALM
CLALM
DV
CC
OR
OTHER
DIGITAL
SUPPLY
TMPALM
RESET
R
PULLUP
DV
CC
OR
OTHER
DIGITAL
SUPPLY
R
PULLUP
MEASOUT
C
C0
C
C1
C
C2
C
C3
EXTFORCE1
EXTFORCE2
CF4
CF3
CF2
CF1
DUT
07779-013
EXTMEASHI1
SENSE
EXTMEASHI2
R
SENSE
2
R
SENSE
1
EXTMEASIL
DUTGND
FORCE
+
10µF
+
0.1µF
10µF
0.1µF
HCAV
DD2
HCAV
SS2
REF
HCAV
DD1
HCAV
SS1
SHARED
REFERENCE
++
+
10µF
+
0.1µF
10µF
0.1µF
+
+
AV
DD
AV
SS
+
10µF
+
0.1µF
DV
CC
+
0.1µF
10µF
0.1µF
++
+
0.1µF
CF0
ADC
DRIVER
Figure 60. External Components Required for Use with the DPS
Table 27. References Suggested for Use with the AD5560
1
Part No. Voltage (V)
Initial
Accuracy %
Ref Out Tempco
(ppm/°C max)
A/B Grade
Ref Output
Current (mA)
Supply Voltage
Range (V) Package
ADR431 2.5 ±0.04 10/3 30 4.5 to 18 MSOP, SOIC
ADR435 5 ±0.04 10/3 30 7 to 18 MSOP, SOIC
ADR441 2.5 ±0.04 10/3 10 3 to 18 MSOP, SOIC
ADR445 5 ±0.04 10/3 10 5.5 to 18 MSOP, SOIC
1
Subset of the possible references suitable for use with the AD5560. See www.analog.com/references for more options.