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參數(shù)資料
| 型號： | RC7352QA |
| 英文描述： | ATE Circuit |
| 中文描述： | 自動測試電路 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 72K |
| 代理商： | RC7352QA |
RC7352
PRODUCT SPECIFICATION
4
R
S1
,
12
R
S1
and R
S2
are TTL or CMOS compatible. The truth table below shows the range
selection table.
R
S1
R
S2
Range Selected
L
L
A
L
H
B
H
H
C
H
L
D
The voltage applied to pin 4 sets the upper current or voltage limit for the
measurement at pin 15 I/VM. To set the desired limit for current measurement a
voltage equaling (4 x I
L
x R) must be applied on this pin. R is the external resistor of
the selected range (A, B, C, or D). For voltage measurement the voltage applied to
this pin is the limit.
V
HF
, High Fail, is an open collector output that requires a pull-up to the logic supply.
If the voltage at pin 15, I/VM, is greater than the threshold voltage at pin 4, I/V
MX
,
V
HF
will become a logic low. The open collector structure makes wire-ORing of
multiple PMU’s possible. Connect a 3,000 pF capacitor to GND to minimize
oscillation at the cross-over point.
V
LF
mirror V
HF
for the lower threshold I/V
MN
. Connect a 3,000 pF capacitor to GND
to minimize oscillation at the cross over point.
When V
DIS
is tied to ground output I/VM, V
HF
and V
LF
are enabled. If V
DIS
is open
V
HF
and V
LF
will require external pullups to maintain a logic high. And I/VM will be in
a high impedance state.
In the Force Voltage/Measure Current mode this output voltage is equal to four times
the voltage across external resistor R of selected range A, B, C, or D through which
the measured current is flowing ((I/V)
M
= 4.0 x I
M
x R). In the Force Current/
Measure Voltage mode this output is equal to the voltage at I/V out. This output can
be disabled by applying a TTL HI on the V
DIS
pin. (Pin 21)
V
FB
, voltage feedback, is the buffered output voltage, I/V
OUT
. This pin should not
be loaded. Connect a 50K 1% resistor from V
FB
to CAP_V.
The RADJ pin is provided to adjust the offset for the I
SENSE
function. The best
accuracy for V/IM is obtained when RADJ is shorted to analog ground. The point is
terminated with a 100
W
resistor in the block diagram.
CA is the common point for two 50 pF compensation capacitors that improve the
stability of the PMU. These components are optional and can be omitted for some
loads.
R
S2
14
I/V
MX
,
I/V
MN
4
26
V
HF
5
V
LF
29
V
DIS
21
I/VM
15
V
FB
20
RADJ
10
CAP_I
CAP_V
CA
11
18
17
Pin Description
(continued)
Pin Name
Pin Number Pin Description
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