NJM2531A
- 1 -
Mixer and Oscillator for TV Tuner
DESCRIPTION
The NJM2531A is mixer/oscillator especially designed for TV tuners
and consists of mixers, oscillators, IF amplifier and OSC buffer for
VHF,UHF and CATV band, built into one chip.
The NJM2531A packaging in SSOP16 is suitable for small-sized
tuners.
FEATURES
Operating Voltage 5V
Mixers, Oscillators, IF AMP and OSC buffer on chip
Bipolar Technology
Package Outline:SSOP16
BLOCK DIAGRAM
PACKAGE OUTLINE
NJM2531AV
VH
F
O
S
C
1
VO
S
C
UH
F
O
S
C
1
UH
F
O
S
C
2
GN
D
O
S
CO
UT
U/
V
S
W
UH
F
I
N
2
UH
F
I
N
1
VH
F
I
N
2
VH
F
I
N
1
MIX
O
U
T
2
MIX
O
U
T
1
VC
C
IF
O
U
T
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VHF OSC
UHF OSC
OSC BUFF
U/V
SW
UHF MIX
VHF MIX
IF AMP
VH
F
O
S
C
2
NJM2531A
- 2 -
ABSOLUTE MAXIMUM RATINGS (T
A
=25
C)
Parameter Symbol Ratings Unit
Supply Voltage
Vcc 7 V
Power Dissipation
P
D
*550 mW
Operating Temperature Range
T
opr
-20 to +75
C
Storage Temperature Range
T
stg
-40 to +125
C
* Test IC soldered on PC board
RECOMMENDED OPERATING VOLTAGE RANGE
(T
A
=25C)
Parameter Condition
Symbol
Min.
Typ.
Max.
Unit
Operating Voltage
Vcc
4.5
5.0
5.5
V
ELECTRICAL CHARACTERISTICS (Note 1) (Vcc=5V,T
A
=25C, IF=45.75MHz)
Parameter Condition
Symbol
Min.
Typ.
Max.
Unit
Operating Current
VHF OSC only, No RF input
Icc1
35
41
56
mA
Operating Current
UHF OSC only, No RF input
Icc2
37
43
58
mA
Conversion Gain
VHF OSC only
f
RF
=55.25 to 361.25MHz, -50dBm
Ga1 - 26 - dB
Conversion Gain
VHF OSC only
f
RF
=55.25 to 361.25MHz, -50dBm
Ga2 - 30 - dB
1% Cross Modulation 1
VHF OSC only
f
RF
=55.25 to 361.25MHz, 75dBuV
f
UD
=f
RF
+1MHz, 75dBuV
CM1 - 78 - dB
1% Cross Modulation 2
UHF OSC only
f
RF
=367.25 to 801.25MHz, 75dBuV
f
UD
=f
RF
+1MHz, 75dBuV
CM2 - 70 - dB
Noise Figure 1
VHF OSC only
f
RF
=55.25 to 361.25MHz
f
IF
=46MHz
NF1 - 13 - dB
Noise Figure 2
VHF OSC only
f
RF
=55.25 to 361.25MHz
f
IF
=46MHz
NF2 - 10 - dB
OSC Output Power
f
local
=101 to 847MHz
OUTosc
- -10 - dBm
Maximum IF Output
Level
f
local
=55.25 to 801.25MHz
OUTif
- 10 - dBm
(Note 1) Because AC characteristics largely depends on application circuit, these parameters are specified
by the DC characteristics as shown in next page.
NJM2531A
- 3 -
DC ELECTRICAL CHARACTERISTICS (V
CC
=Vosc=Vmix=5V,T
A
=25C,UHF:Vb=2.97V,VHF:Vb=2.98V)
Parameter Condition
Symbol
Min.
Typ.
Max.
Unit
Pin3
Current
1:UHF
Vsw=2v
Iosc1 4.35 - 9.70
mA
Pin3
Current
2:VHF
Vsw=0.5v
Iosc2 3.75 - 8.60
mA
Pin7
Voltage
1:UHF
Vsw=2v
Voscout1
3.15 - 4.00 V
Pin7
Voltage
2:VHF
Vsw=0.5v
Voscout2
3.15 - 3.85 V
Pin9
Voltage
Vsw=2v
Vifout 1.50 - 2.85 V
Pin10 Current
Vsw=2v Icc
17 - 47.5
mA
Pin11 Current 1:UHF
Vsw=2v Imixouta1
1.65 - 3.80
mA
Pin11
Current
2:VHF
Vsw=0.5v
Imixouta2
1.45 - 3.30
mA
Pin12 Current 1:UHF
Vsw=2v
Imixoutb1
1.65
-
3.80
mA
Pin12 Current 2:VHF
Vsw=0.5v
Imixoutb2
1.45
-
3.30
mA
Pin2 Current
Vsw=0.5v,Vb=2.98v,1-2PinShort
Ivosc
-
-
4.60
mA
Pin4 Current
Vsw=2v,Vb=2.97v,4-5PinShort Iuosc 1.30 - 5.70
mA
Pin13
Voltage
Vsw=0.5v
Vvmixa 2.23 - 2.83 V
Pin14
Voltage
Vsw=0.5v
Vvmixb 2.23 - 2.83 V
Pin15
Voltage
Vsw=2v
Vumixa 2.22 - 2.82 V
Pin16 Voltage
Vsw=2v Vumixb
2.22 - 2.82 V
Pin1 Voltage
Vsw=0.5v Vvosc1
2.70 - 3.30 V
Pin2
Voltage
Vsw=0.5v
Vvosc2 2.00 - 2.60 V
Pin4
Voltage
Vsw=2v
Vuosc1 2.00 - 2.60 V
Pin5
Voltage
Vsw=2v
Vuosc2 2.70 - 3.30 V
DC TEST CIRCUIT
16
+
1u
VH
F
O
S
C
1
VH
F
O
S
C
2
VO
S
C
UHF
O
S
C
1
UHF
O
S
C
2
GN
D
O
S
CO
UT
U/
V
S
W
UHF
I
N
2
UHF
I
N
1
VH
F
I
N
2
VH
F
I
N
1
MI
X
O
U
T
2
MI
X
O
U
T
1
VC
C
(V
m
i
x
)
IF
O
U
T
+
1u
Vb
VHF
Vsw
1n
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1n
1n
1n
1n
1n
1n
1n
1n
1n
1n
1n
1n
1n
1n
NJM2531A
- 4 -
AC TEST CIRCUIT
16
VH
F
O
S
C
1
VH
F
O
S
C
2
VO
S
C
UHF
O
S
C
1
UHF
O
S
C
2
GN
D
O
S
CO
UT
U/
V
S
W
UHF
I
N
2
UHF
I
N
1
VH
F
I
N
2
VH
F
I
N
1
MI
X
O
U
T
2
MI
X
O
U
T
1
VC
C
(V
m
i
x
)
IF
O
U
T
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
OSC OUT
VCC
VT
VHF
UHF
VLO
VHI
100k
2k
91p
1n
2k
1.5p
2k
1n
2.2n
2.2n
33k
27p
4p
7p
36p
15p
51p
15p
0.5p
1T363A
1T363A
HVU202A
1n
1T363A
33k
33k
1n
UHF IN
VHF IN
IF OUT
2.2n
2.2n
2.2n
2.2n
2.2n
2.2n
20p
16774B
NJM2531A
- 5 -
TERMINAL CHARACTERISTICS
No. Symbol
Typ.DC
Voltage (V)
Equivalent Circuit
Function
1 VHFOSC1
VHF
3.0
2 VHFOSC2
VHF
2.2
VHF
Oscillator
3 VOSC
-
Oscillator
Power Supply
4 UHFOSC1
UHF
2.2
5 UHFOSC2
UHF
3.0
UHF
Oscillator
6 GND
-
GND
7 OSCOUT 3.5
OSC Output
8 U/V
SW
-
UHF/VHF
Select Switch
UHF at Vcc
VHF at GND
9 IFOUT 2.2
IF Output
1
2
3
3
5
4
7
8
9
NJM2531A
- 6 -
No. Symbol
Typ.DC
Voltage (V)
Equivalent Circuit
Function
10 VCC
-
Power Supply
Except for Oscillator
11 MIXOUT1
-
12 MIXOUT2
-
Mixer Output
13
VHFIN1
VHF
2.5
14 VHFIN2
VHF
2.5
RF Input
for VHF band
15 UHFIN1
UHF
2.5
16 UHFIN2
UHF
2.5
RF Input
for UHF band
11
12
13
14
16
15
NJM2531A
- 7 -
TYPICAL CHARACTERISTICS
Vcc=5V,fIF=45.75MHz,T
A
=25
C
0
1 0
2 0
3 0
4 0
5 0
6 0
0
20 0
40 0
60 0
800
C O N VE R TION G AIN v sR F F R EQ U E NC Y
C
O
N
V
E
R
T
I
ON
GA
I
N
[
d
B
]
RF FR E QU E N CY [M Hz ]
VHF _Lo w
VHF _Hi
UH F
-2 0
-1 5
-1 0
-5
0
5
1 0
1 5
-60
-5 0
-4 0
-3 0
-2 0
-1 0
0
10
20
R F IN PU T L EVEL v sIF O U TPU T L EV EL
fRF= 80 1.25M H z (UHF)
I
F
O
U
TP
U
T
L
E
V
E
L [
d
B
m
]
R F INP UT LE V EL [dB m]
5 0
5 5
6 0
6 5
7 0
7 5
8 0
8 5
9 0
0
200
400
600
800
1 % XM v sR F F R EQ U E N CY
f u nd =fR F +1M H z ,p u nd=p R F
1
%
XM
[
d
B
u
V]
R F FRE Q U E N CY [M H z ]
VHF _Low
VHF _Hi
UHF
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
0
20 0
40 0
600
800
NO ISE F IG U R Ev sR F F R EQ U E N C Y
NF
[
d
B]
R F FRE Q U E NCY [M H z ]
VHF _Low
VHF _Hi
UH F
MEMO
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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