E4257ALPT-T データシートの表示（PDF） - Semtech Corporation
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E4257ALPT-T Datasheet PDF : 39 Pages
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TEST AND MEASUREMENT PRODUCTS
Circuit Description (continued)
E4237/E4257/E4287
VA
1K
710K0
SELC
VC
1K
VB
SELCOMP
HIZ
CCOMP
COMP1
HLV
COMP2
710K0
LLV
VOLTAGE OR
CURRENT LIMIT
VINP
10KΩ
FORCEAMP
10KΩ
FV/FI*
FI
LI
FV
LV
MI/MV*
MI
1K
MV
DISMON
IVMAX
IVMIN
IVMON
VAOUT
E4287
VBOUT
40
3KΩ 1.5KΩ
1K
1K
REXT (1 of 4) (E4257, E4287)
(1 of 2) (E4237)
RF
40Ω for E4257, E4287
400Ω for E4237
FORCE
SELEPMU
SELIPMU
SENSE
DUT
1K
GUARD
E4287
1K
DUTNH
DUTNL
EPMUF
DUTGND
EPMUS
NOTE: Switch impedance shown for typical values.
Signals common to
both PMUs
Figure 2. PMU Functionality/Range at the FORCE and RF Pins
2005 Semtech Corp. / Rev. 5, 11/30/05
11
www.semtech.com
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