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參數(shù)資料
| 型號： | E4707B-EDGE4707B |
| 英文描述： | Quad Channel Per-Pin Precision Measurement Unit |
| 中文描述： | 四通道按針腳精密測量單元 |
| 文件頁數(shù)： | 22/25頁 |
| 文件大?。?/td> | 194K |
| 代理商： | E4707B-EDGE4707B |
6
Revision 3 / December 18, 2002
www .semtech.com
TEST AND MEASUREMENT PRODUCTS
Edge4707B
Circuit Description
Circuit Overview
The Edge4707B is a quad channel parametric test and
measurement unit that can :
Force Voltage / Measure Current
Force Current / Measure Voltage
Force Voltage / Measure Voltage
Force Current / Measure Current
Each PMU channel can force or measure voltage over a
15V range and force or measure current over four distinct
ranges:
± 2 A
± 20 A
± 200 A
± 2 mA.
An on-board window comparator provides two bit output
range classification. Also, a monitor passes a real time
analog voltage which tracks either the measured current
or voltage.
PPMU Functionality
The trapezoid in Figure 1 describes the current-voltage
functionality of the PMU with VCC = 15.5V and
VEE = –4.5V, in Range D.
Control Inputs
FV/FI* is a TTL compatible input which determines whether
the PMU forces voltage or current, and MI/MV* is a TTL
compatible input which determines whether the PMU
measures current or voltage.
FV/FI* and MI/MV* are
independent for each PMU. Table 1 describes the modes
of operation controlled by these pins.
Table 1.
RS0 and RS1 are TTL compatible inputs to an internal
analog mux which selects an external resistor
corresponding to a desired current range. The truth table
for RS0 to RS1, along with the associated external resistor
values and current ranges, is shown in Table 2. RS0 and
RS1 are independent for each channel of the 4707B.
Table 2.
FORCE/SENSE
FORCE is an analog output which either forces a current
or forces a voltage, depending on which operating mode
is selected.
SENSE is a high impedance analog input which measures
the DUT voltage input in the MV operating mode.
FORCE and SENSE are brought out to separate pins to
allow remote sensing.
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VOUT (@ I = 0) = 13.25V
VOUT (@ 2 mA) = –0.25V
VOUT (@ 2 mA) = 11.25V
VOUT (@ 200 A) = 12.8V (in Range D)
VOUT (@ –200 A) = –1.8V (in Range D)
VOUT (@ I = 0) = –2.25V
VCC = +15.5V
VEE = –4.5V
V
No restrictions
IMIN (–2 mA)
IMAX (2 mA)
NOTE: Negative current implies current is flowing into the 4707 from DUT.
Figure 1. PMU Functionality
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