TC9402 TELCOM [TelCom Semiconductor, Inc], TC9402 Datasheet - Page 11

• Manufacturer Part Number: TC9402
• Description: VOLTAGE-TO-FREQUENCY/FREQUENCY-TO-VOLTAGE CONVERTERS
• Manufacturer: TELCOM [TelCom Semiconductor, Inc]

VOLTAGE-TO-FREQUENCY/
FREQUENCY-TO-VOLTAGE CONVERTERS
–5V
f IN
0.5µsec
2 k
MIN
f OUT /2
TELCOM SEMICONDUCTOR, INC.
INPUT
f OUT
ADJUST
OFFSET
FIGURE
SEE
+5V
6
100k
2.2k
Figure 8 . F/V Digital Outputs
DELAY = 3µsec
2
ZERO ADJUST
THRESHOLD
DETECT
TC9400A
TC9401A
TC9402A
I BIAS
5.0µsec
MIN
11
1
10 k
THRESHOLD
DETECTOR
V SS
Figure 7.
4
DELAY
3 sec
DC — 10 kHz F/V Converter
V REF
7
V REF
(TYPICALLY –5V)
V DD
+5V
14
Input Buffer
these outputs may be useful for some applications, such as
a buffer to feed additional circuitry. Then, f
input frequency waveform, except that f
3 sec after f
frequency of one-half f
connected to ground.
f
If these outputs are not used, pins 8, 9 and 10 should be
AMP
+
OUT
–
OP
2
and f
IN
OUT
goes high; f
/2 are not used in the F/V mode. However,
60pF
GND
12pF
OUT
COMMON
6
OUTPUT
f OUT/2
.
OUT
f OUT
V REF
AMP
OUT
OUT
I IN
/2 will be squarewave with a
10
9
8
5
3
12
* OPTIONAL
*
IF BUFFER
IS NEEDED
V +
V +
R INT
1 M
C REF
56 pF
*
*
OUT
OUT
+
will follow the
will go high
TC9400
TC9401
TC9402
SEE
EQUATION,
PAGE 12
C INT
1000pF
V O
3-297
1
2
3
4
5
6
7
8