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| TDA8780M Datasheet, PDF (4/16 Pages) NXP Semiconductors – True logarithmic amplifier | |||
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Philips Semiconductors
True logarithmic ampliï¬er
Product speciï¬cation
TDA8780M
PINNING
SYMBOL PIN
DESCRIPTION
Vin
GND1
1 signal voltage input
2 ground 1
CDEC1
3 control circuit ï¬rst decoupling and
optional start-up capacitor connection
Rg
4 small-signal gain-setting resistor
Rg
5 small-signal complementary
gain-setting resistor
Clf
6 low-frequency cut-off point setting
capacitor
GND2
7 ground 2
Vref
8 external reference voltage input
n.c.
9 not connected
GND3
10 ground 3 (main ground)
VP
11 power supply
n.c.
12 not connected
Vout
GND4
13 true logarithmic voltage output
14 ground 4
Clf
15 complementary low-frequency cut-off
point setting capacitor
CE
16 TTL-level-compatible circuit enable
input (active HIGH)
TEST
17 test input; connected to ground in
normal operation
CDEC2
18 control circuit second decoupling and
optional start-up capacitor
GND5
19 ground 5
Vin
20 complementary signal voltage input
handbook, halfpage
Vin 1
20 Vin
GND1 2
19 GND5
C DEC1 3
18 C DEC2
Rg 4
17 TEST
Rg 5
C lf 6
16 CE
TDA8780M
15 C lf
GND2 7
Vref 8
n.c. 9
GND3 10
14 GND4
13 Vout
12 n.c.
11 VP
MBE160
Fig.2 Pin configuration.
1995 Jul 25
4
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