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PDF NJM2172 Data sheet ( Hoja de datos )
| Número de pieza | NJM2172 | |
| Descripción | OPERATIONAL AMPLIFIER WITH EVR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM2172
OPERATIONAL AMPLIFIER WITH EVR
s GENERAL DESCRIPTION
The NJM2172 is single supply, dual OP-AMP with
electric variable resistor (EVR), which contains buffer
amplifier, OP-AMP, reference voltage circuit, EVR and EVR
control circuit.
The reference is fixed around 1/2 V+ level internally, and
only required few external parts.
The A and B EVR is control separately, and amp drive
up to 100Ω(typ.) load. The NJM2172 is suitable for
camcorder, CD, MD, and other audio signal process
system.
s PACKAGE OUTLINE
NJM2172V
s FEATURES
q Low Power Supply Voltage
q Low Operating Current
q A/Bch EVR adjust is separately
q EVR range
q Drivability
q Bipolar Technology
q Package Outline
V+ = 2.7 to 5.5V
Icc = 5.0mA typ.
-3.0 to -95ｄB
100Ω typ.
SSOP14
s BLOCK DIAGRAM
s PIN CONFIGURATION
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14 13 12 11 10 9
Bch OPAMP
Bch EVR
Bch
VCA
Bch EVR AMP VREF AMP
Bch EVR Control
Ach EVR
Ach OPAMP
Ach EVR Control
Ach EVR AMP
Ach
VCA
123456
8
7
1: OP+INA
2: OP-INA
3: OPOUTA
4: EVROUTA
5: VCNTA
6:
7:
VVC+NTB
8: GND
9: Vref
10:REFIN
11:EVROUTB
12:OPOUTB
13:OP-INB
14:OP+INB
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NJM2172
s TEST CIRCUIT 2
et4U.com
1µ
2.5k
VO3
V
10k
1µ 10k
VI2
SW6
47µ
20k VO4 10µ
SW7
100 V
1µ
12 3 4
10 9
8
OPAMP
EVR
VCA
EVR AMP
EVR Control
VREF AMP
1234
Ach 1 2 3 4
Bch 14 13 12 11
5
5 pin
6 pin
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57
VCNT V+ 47µ
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Test circuit 2 shows only Ach.
Fig.2
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s APPLICATION CIRCUIT 2
Invert Circuit (Gv=6dB)
NJM2172
10k
et4U.com
1µ 10k
VIN
20k 47µ
RL
10µ 1µ
12 34
10 9
8
OPAMP
EVR
VCA
EVR AMP
EVR Control
VREF AMP
1234
Ach 1 2 3 4
Bch 14 13 12 11
5
5 pin
6 pin
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57
VCNT V+ 47µ
Application circuit 2 shows only Ach.
Fig.5
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11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet NJM2172.PDF ] | |
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