ChipFind - документация

Электронный компонент: NJM2760

Скачать:  PDF   ZIP
NJM2760
1
Band Pass Filter for Spectrum Analyzer Display
s
s
s
s
GENERAL DESCRIPTION
s
s
s
s
PACKAGE OUTLINE
The
NJM2760
is a band pass filter for spectrum analyzer display.
It includes
4-band BPF amplifier, 4-band detector and recording
level indicator output.
It is suitable for mini-components, CD radio cassette and other
audio components.

s
s
s
s
FEATURES
q
Operating Voltage
+2.7V to +9V
q
4 Band Pass Filters & Detector
q
Recording Level Indicator Output
q
Low Offset Voltage
5mV typ.
q
Adjustable Input Sensitivity
q
Bipolar Technology
q
Package Outline
SSOP20

s
s
s
s
PIN CONFIGURATION











s
s
s
s
BLOCK DIAGRAM


NJM2760V
L in
R in
REC out
BPF2 out
BPF3 out
BPF4 out
BPF1 out
BPF
BPF
BPF
DET
DET
DET
DET
DET
GND
V+
BPF
200k
200k
200k
200k
5.6k
10k
6.8k
22nF
47nF
4.7nF
470pF
1F
1F
1F
1F
1F
1F
1F
1F
4
6
5
1
2
3
7
8
10
9
14
13
16
15
18
17
20
19
12
11
1. IN1
20. BUF2OUT
2. IN2
19. BPF1IN2
3. BUF1OUT
18. BPF1IN1
4. BPF2IN1
17. RECOUT
5. BPF2IN2
16. BPF1OUT
6. BPF3IN1
15. BPF2OUT
7. BPF3IN2
14. BPF3OUT
8. BPF4IN1
13. BPF4OUT
9. BPF4IN2
12. N.C.
10. GND
11. V+
NJM2760
2
s
s
s
s
ABSOLUTE MAXIMUM RATING
(Ta=25
C)
PARAMETER SYMBOL
RATINGS
UNIT
Supply Voltage
V
+
14 V
Power Dissipation
P
D
300
mW
Operating Temperature Range
Topr -20
to
+75
C
Storage Temperature Range
Tstg -40
to
+125
C


s
s
s
s
ELECTRICAL CHARACTERISTICS
(Ta=25
C, V+=3.3V, V
IN
=1V
PEAK
unless otherwise specified)
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
x
x
x
x
Power Supply
Operating Voltage
V
+
-
2.7
3.3
9.0
V
Operating Current
Icc
No Signal
-
1.4
3.0
mA
x
x
x
x
AC CHARACTERISTICS
Typical Output Voltage
V
OT
Vin=1V
peak
,
f=Center Frequency of BPF
0.7 1.0 1.42 V
Maximum Output Voltage
V
OM
Vin=3V
peak
,
f=Center Frequency of BPF
2.1 3.0 - V
BPF1 Center Frequency Level
G
VBPF1
f=8kHz
-3
0
+3
dB
BPF2 Center Frequency Level
G
VBPF2
f=1.2kHz
-3
0
+3
dB
BPF3 Center Frequency Level
G
VBPF3
f=300Hz
-3
0
+3
dB
BPF4 Center Frequency Level
G
VBPF4
f=80Hz
-3
0
+3
dB
DC Offset Voltage
V
OS
No
Signal
-
5
30 mV

x
x
x
x
TEST CIRCUIT
C1 1
F
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
19
18
17
13
20
NJM2760
IN1
IN2
BUF1OUT
BPF2IN1
BPF2IN2
BPF3IN2
BPF4IN1
BUF2OUT
BPF1IN2
BPF1IN1
RECOUT
BPF2OUT
BPF1OUT
BPF3OUT
NC
V+
BPF3IN1
BPF4OUT
GND
BPF4IN2
+
C9
1
F
V+
C2 1
F
R1 100k
R2 100k
R3 6.8k
R4 5.6k
R5 10k
C3 4.7nF
C4 4.7nF
C5 22nF
C6 22nF
C7 47nF
C8 47nF
C10 1
F
C11 1
F
C12 1
F
C13 1
F
C14 1
F
C15 470pF
C16 470pF
RECOUT
BPF2OUT
BPF1OUT
BPF3OUT
BPF4OUT
IN1
IN2
NJM2760
3
s
s
s
s
TERMINAL DESCRIPTION
No. SYMBOL
FUNCTION
EQUIVALENT
CIRCUIT
VOLTAGE
1
2
5
7
9
19
IN1
IN2
BPF2IN2
BPF3IN2
BPF4IN2
BPF1IN2
Input for BPF1-4
Input for recording level detector
Capacitor terminal for BPF2
Capacitor terminal for BPF3
Capacitor terminal for BPF4
Capacitor terminal for BPF1
1.4V
3
20
BUF1OUT
BUF2OUT
Buffer output
Buffer output
1.4V
4
6
8
18
BPF2IN1
BPF3IN1
BPF4IN1
BPF1IN1
Capacitor terminal for BPF2
Capacitor terminal for BPF3
Capacitor terminal for BPF4
Capacitor terminal for BPF1
1.4V
13
14
15
16
17
BPF4OUT
BPF3OUT
BPF2OUT
BPF1OUT
RECOUT
BPF4 output
BPF3 output
BPF2 output
BPF1 output
Recording level detector output
0V
10 GND
Ground
terminal
-
11 V+
Power
supply
terminal
-

680
680
FB
680
FB
90k
30k
NJM2760
4
s
s
s
s
APPLICATION CIRCUIT
































C1 1
F
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
19
18
17
13
20
NJM2760
IN1
IN2
BUF1OUT
BPF2IN1
BPF2IN2
BPF3IN2
BPF4IN1
BUF2OUT
BPF1IN2
BPF1IN1
RECOUT
BPF2OUT
BPF1OUT
BPF3OUT
NC
V+
BPF3IN1
BPF4OUT
GND
BPF4IN2
+
C9
1
F
V+
C2 1
F
R11 200k
R3 6.8k
R4 5.6k
R5 10k
C3 4.7nF
C4 4.7nF
C5 22nF
C6 22nF
C7 47nF
C8 47nF
C10 1
F
C11 1
F
C12 1
F
C13 1
F
C14 1
F
C15 470pF
C16 470pF
RECOUT
BPF2OUT
BPF1OUT
BPF3OUT
BPF4OUT
LIN
RIN
R12 200k
R21 200k
R22 200k
NJM2760
5
s
s
s
s
APPLICATION NOTE

1. Center Frequency Setting for Band Pass Filters

Band pass filters equivalent circuits as follows.















Center Frequency (fo) can be formulated as follows.









*
)
As regards the BPF1, the values of Ra and Rb are fixed. Also as regards the BPF2-4, the values of Rb is fixed.



2. Output Gain Setting for RECout.

Output Voltage of RECout is adjustable by external resistor: R2
Voltage Gain (Gv) is defined as follows.


Ra
Rb
C
BPF1 (8kHz)
10 k*
)
169
k*
)
470pF
BPF2 (1.2kHz)
6.8 k 113
k*
)
4.7nF
BPF3 (300Hz)
5.6 k 96.5
k*
)
22nF
BPF4 (80Hz)
10 k 169
k*
)
47nF
Ra
to Detector
Rb
C
C
Internal Circuit
External Circuit
from Input Buffer
Ra
to Detector
Rb
C
C
Internal Circuit
from Input Buffer
External Circuit
Fig.1-a. BPF1's Equivalent Circuit
Fig.1-b. BPF2-4 's Equivalent Circuit
Table 1. Center frequency setting example
b
0
CR
2
Q
2
f
=
[Hz], Q=2
]
k
[
100
]
k
[
R
G
]
Vpeak
[
Vin
]
Vdc
[
Vout
2
v
=
=