Ordering number : EN5675
Monolithic linear IC
LA7170M
RF Modulator for UHF Band (Supports SECAM)
Overview
Package Dimensions
The LA7170M is a UHF band RF modulator whose builtin RF oscillator and mixer make it a single-chip RF
modulator solution. It also supports image positivity
modulation and AM sound modulation for SECAM
systems.
unit: mm
3036B-MFP20
[LA7170M]
SANYO: MFP20
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
VCC max
Allowable power dissipation
Pd max
Unit
7
Ta ≤ 75°C
V
250
mW
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Recommended operating voltage
Operating supply voltage range
Symbol
Conditions
VCC
VCC op
5.0
V
4.5 to 5.5
V
Operating Characteristics at Ta = 25°C, VCC = 5 V, Unless otherwise specified, fp = 591.25 MHz, fs = 5.5 MHz,
S9: ON, S10: B, S19A: B, S19B: B
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
Current drain 1
ICC1
With no input
24
30
36
mA
Regulator voltage
Vreq
With no input
3.7
3.9
4.1
V
[RF Output Level] (S19A: A, S19B: A)
Picture carrier output
P
With no input, with 50 Ω terminator
77
79.5
82
dBµ
12.5
15
17.5
dB
Ratio of levels at fp and fp+2fs
52
62
dB
P/S3
Ratio of levels at fp and fp+3fs
58
68
dB
Chrominance beat
P/CB
Ratio of P above to chrominance beat for
VIN = 0.4 Vp-p with 4.43-MHz sine wave input
65
75
dB
Picture harmonic distortion
P/V2
Ratio of P above to level at fp+2 MHz for
VIN = 1 Vp-p with 1-MHz sine wave input
50
62
dB
Sound carrier output ratio
P/S
Ratio of levels at fp and fp+fs
Sound second harmonic distortion
P/S2
Sound third harmonic distortion
Continued on next page.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
43098HA (OT) No. 5675-1/8
LA7170M
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
[Picture]
Picture modulation
mp
Maximum picture modulation
mp max
∆(S/V)
SYNC compression
VIN = 1 Vp-p, 100% white
73
80
87
VIN = 1.5 Vp-p, 100% white
88
93
98
%
1.5
5
%
VIN = 1 Vp-p, 100% white {1–(S/V)(3/7)} × 100
Differential gain
DG
VIN : 5-stair step, mp = 80%, at fourth step
Differential phase
DP
VIN : 5-stair step, mp = 80%, at fourth step
–6
%
2
5
%
0
+6
deg
SECAM picture modulation
mp SCM
VIN = 1 Vp-p, 100% white S10 : a
88
93
98
%
TSG picture modulation
mp TSG
S9 : off
70
80
90
%
V/S
S9 : off
6.3/3.7
6.8/3.2
7.3/2.7
TSG SV ratio
TSG horizontal period
TS
S9 : off
63.7
64.0
64.3
µs
TSG synchronization pulse width
HS
S9 : off
3.6
4.0
4.4
µs
TSG white signal width
HV
S9 : off
3.6
4.0
4.4
µs
TSG first white rising edge
TV1
S9 : off
22
24
26
µs
TSG second white rising edge
TV2
S9 : off
38
40
42
µs
Rank A
73
81
89
%
Rank B
81
90
99
%
90
100
110
%
99
110
121
%
109
121
133
%
0.93
0.98
1.03
0.3
1.0
[Sound]
FM sound modulation
Rank C
ms FM
Rank D
Rank E
AIN = 1.66 Vp-p with 1-kHz sine wave input;
100% modulation: ±50 kHz; S10: b
Note: AIN = 1 Vp-p normally produces 60%
modulation.
Interchannel FM sound modulation ratio
∆ms FM
ms FM ratio with S10: off
FM sound distortion
THD FM
S10: b/off; AIN = 1 Vp-p with 1-kHz sine
wave input
FM sound signal-to-noise ratio
S/NFM
S10: b/off; VIN = 1 Vp-p color bar; AIN with
1-kHz sine wave input; ratio of level at AIN =
1 Vp-p to that at AIN = 0 Vp-p
Maximum FM modulation
ms max
Maximum modulation possible with S10:
b/off and sound distortion ratio within 3%
AM sound modulation
ms AM
S10: a; AIN = 1 Vp-p with 1-kHz sine wave
input
AM sound distortion ratio
THD AM
S10: a; AIN = 1 Vp-p with 1-kHz sine wave
input
AM sound signal-to-noise ratio
S/N AM
S10: a; VIN = 1 Vp-p color bar; AIN with 1-kHz
sine wave input; ratio of level at AIN = 1 Vp-p
to that at AIN = 0 Vp-p
43
55
dB
400
43
42
%
%
50
57
%
0.5
2
%
47
dB
Note: The AM sound items refer to direct AM detection from the sound carrier (fp + sound intercarrier). This device requires the special care associated with
all high-frequency devices.
No. 5675-2/8
LA7170M
Pin Functions
Pin No.
Symbol
Pin Voltage
1
VCC1
5.0
VCC for baseband circuits
Pin Description
2
3
TANK1
TANK2
3.9
Connect tank circuits between these pins and the
REG pin.
4
REG
3.9
Regulator output
5
FM AUDIO IN
0
FM sound input
6
AM AUDIO IN
0
AM sound input
7
GND1
0
Ground for baseband circuits
8
VIDEO IN
3.0
9
RES
2.6
(open)
Equivalent Circuit
Picture input. Clamp at SYNC tip.
Ground this pin through a 500-kHz oscillator.
Open : TSG ON
GND : TSG OFF
Continued on next page.
No. 5675-3/8
LA7170M
Continued from preceding page.
Pin No.
Symbol
Pin Voltage
Pin Description
10
FoCTL
2.6
(open)
11
12
13
14
OSC-B1
OSC-E1
OSC-E2
OSC-B2
2.5
1.8
1.8
2.5
15
GND2
0
16
VCC2
5.0
17
GND3
0
18
P/S
1.7
Grounding this pin through a capacitor or resistor
attenuates the sound intercarrier level.
19
RF OUT
3.0
RF mixer signal output
20
VCC3
5.0
VCC for RF mixer
Equivalent Circuit
L (0 to 1.5 V) : PAL-TANK1
M (2.1 to 3.2 V) : PAL-TANK2
H (3.8 to 5.0 V) : SECAM-TANK2
This circuit forms a Colpitts oscillator.
Ground for RF oscillator
VCC for RF oscillator
VCC for RF mixer
No. 5675-4/8
LA7170M
Block Diagram
No. 5675-5/8
5.5-MHz coil Sumida Electric SA-1038
6.5-MHz coil Sumida Electric SA-1002
500-kHz resonator Murata CSB500E54
LA7170M
Test Circuit
No. 5675-6/8
5.5-MHz coil Sumida Electric SA-1038
6.5-MHz coil Sumida Electric SA-1002
500-kHz resonator Murata CSB500E54
LA7170M
Sample Application Circuit
No. 5675-7/8
LA7170M
■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of April, 1998. Specifications and information herein are subject to change
without notice.
PS No. 5675-8/8