LA1787NM [SANYO]
Single-Chip Car Radio System IC; 单芯片车载无线电系统IC
| 型号： | LA1787NM |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Single-Chip Car Radio System IC |
| 文件： | 总6页 (文件大小：322K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA0229
Monolithic Linear IC
Single-Chip Car Radio
System IC
LA1787NM
Overview
The LA1787NM integrates the six circuit blocks required in a car tuner on a single chip.
Features
• Improved noise prevention and reduction.
- Excellent three-signal characteristics equivalent to the Sanyo LA1193 FM front end IC.
- Improved medium and weak field noise canceller characteristics provide superb listenability.
- Improved separation.
- Built-in anti-birdie filter.
- Improved AM and FM temperature characteristics.
- Excellent FM S-meter linearity.
- Modified noise canceller circuit achieves improved noise rejection.
• Improved AM adjacent channel characteristics (∆40kHz).
• Double conversion AM tuner (upconversion).
- Fewer external components required than earlier double conversion tuners, no crystal required (when used as a pair
with the LC72144).
• Built-in FM IF circuit sample-to-sample variations correction circuit for the FM IF circuit.
(The SD, KEYEDAGC, MUTE ON, ADJ, MUTE ATT, SNC, and HCC pins can all used fixed resistors.)
• Improved FM separation temperature characteristics.
• This product inherits the block arrangement of the LA1780M, and allows pin compatible design in end products.
• The LA1787NM adds an FM S-meter shifter function to the LA1787M.
Functions
• FM front end.
• Multiplexer.
• FM IF.
• Noise canceller.
• FM/AM switch.
• MRC.
• AM upconverter.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
92706 / 12506 MS OT B8-7095 No.A0229-1/6
LA1787NM
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Maximum supply voltage
V
V
1 max
2 max
Pins 6, 40, and 61
9.0
12
CC
Pins 7, 45, 54, 59, and 60
V
CC
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Ta ≤ 55°C
950
-40 to +85
-40 to +150
mW
°C
°C
Tstg
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Pins 6, 7, 40, 45, 54, 59, 60, and 61
Pins 26
Ratings
8.0
Unit
V
Recommended supply voltage
V
CC
V
ST IND
5
V
CC
Operating supply voltage range
V
op
7.5 to 9.0
V
CC
Operating Characteristics at Ta = 25°C, V = 8.0V, in the specified test circuit, FM IF input
CC
* : Note that these tests are made using an IC socket, models IC-51-0644-824 and KS8277 (Yamaichi Electronics Co., Ltd.).
Switch settings
Ratings
typ
Parameter
Symbol
Conditions
Unit
1
2
3
4
5
6
7
8
9
10 min
max
110
FM Characteristics - FM IF Input
Quiescent
current
I
-FM
No input, I40+I45+I54+I59+I60+I61
ON
ON
ON
B
B
B
OFF
OFF
OFF
B
B
B
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
60
94
310
295
mA
CCO
Demodulated
output
V
-FM
10.7MHz, 100dBµ, 1kHz,
205
190
415 mVrms
380 mVrms
O
100% modulation, the pin 15 output
Pin 31
V
-FM31
10.7MHz, 100dBµ, 1kHz,
O
demodulated
output
100% modulation, the pin 31 output
Channel
balance
CB
10.7MHz, 100dBµ, 1kHz,
ON
ON
ON
B
B
B
B
B
OFF
OFF
OFF
OFF
OFF
B
B
B
B
B
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
-1
0
0.3
82
+1
1
dB
%
Pins 15, 16 ratio
Total harmonic THD-FMmono 10.7MHz, 100dBµ, 1kHz,
distortion
100% modulation, pin 15
10.7MHz, 100dBµ, 1kHz,
100% modulation, pin 15
Signal-to-noise
ratio (IF)
S/N-FM IF
AMR IF
Att-1
75
55
5
dB
dB
dB
AM rejection
ratio (IF)
10.7MHz, 100dBµ, 1kHz, fm = 1kHz, ON
68
pin 15 when 30% AM
Muting
10.7MHz, 100dBµ, 1kHz,
ON
ON
ON
ON
10
15
25
38
attenuation (1)
The pin 15 attenuation when V33 is
changed from 0 to 2V
Muting
Att-2
Att-3
10.7MHz, 100dBµ, 1kHz,
B
B
OFF
OFF
B
B
ON ON OFF ON
ON ON OFF ON
15
28
20
33
dB
dB
attenuation (2)
The pin 15 attenuation when V33 is
changed from 0 to 2V *1
Muting
10.7MHz, 100dBµ, 1kHz,
attenuation (3)
The pin 15 attenuation when V33 is
changed from 0 to 2V *2
Separation
Separation 10.7MHz, 100dBµ, L+R = 90%,
B
B
B
B
B
OFF
OFF
OFF
OFF
OFF
B
B
B
B
B
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
30
2.1
1.3
40
4.1
3.2
0.3
30
dB
%
pilot = 10%, the pin 15 output ratio
Stereo on level
Stereo off level
Main distortion
ST-ON
The pilot modulation such that V26 is ON
less than 0.5V
6.1
1.2
ST-OFF
The pilot modulation such that V26 is ON
less than 3.5V
%
THD-Main L 10.7MHz, 100dBµ, L+R = 90%,
ON
%
pilot = 10%, pin 15
Pilot
PCAN
10.7MHz, 100dBµ, pilot = 10%,
Pin 15 signal
ON
ON OFF OFF OFF
/ON
20
1
dB
cancellation
The pilot level leakage, DIN audio
10.7MHz, 100dBµ, L-R = 90%,
pilot = 10%, V28 = 3V→0.6V, pin 15
SNC output
attenuation
AttSNC
ON
B
OFF
B
ON OFF OFF ON
5
9
dB
Continued on next page.
No.A0229-2/6
LA1787NM
Continued from preceding page.
Switch settings
Ratings
typ
Parameter
Symbol
Conditions
Unit
dB
1
2
3
4
5
6
7
8
9
10 min
0.5
max
8.5
HCC output
AttHCC-1
10.7MHz, 100dBµ, 10kHz,
L+R = 90%, pilot = 10%,
ON
B
OFF
B
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON ON
ON OFF OFF ON
4.5
attenuation (1)
V29 = 3V→0.6V, pin 15
HCC output
AttHCC-2
Vi-lim
10.7MHz, 100dBµ, 10kHz,
L+R = 90%, pilot = 10%,
ON
ON
ON
B
B
OFF
OFF
B
B
6
10
40
14
47
dB
attenuation (2)
V29 = 3V→0.1V, pin 15
Input limiting
voltage
100dBµ, 10.7MHz, 30% modulation
The IF input such that the output is
-3dB down referenced to the input
The IF input level when V33 = 2V,
no modulation
33
dBµ
Muting
Vi-mute
B
B
OFF
OFF
B
B
27
54
35
62
43
70
dBµ
dBµ
sensitivity
SD sensitivity
(1)
SD-sen1FM The IF input such that the IF counter ON
buffer output goes to the on state
OFF OFF OFF OFF ON
(100mVrms or higher)
SD sensitivity
(2)
SD-sen2FM The IF input such that the SD pin goes ON
to the on state, no modulation
B
B
B
B
B
B
B
B
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
B
B
B
B
B
B
B
B
ON OFF OFF OFF ON
OFF OFF OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
54
130
0.0
0.4
2.0
4.7
150
62
200
0.1
1.0
2.7
5.5
220
70
dBµ
IF counter buffer
output
V
10.7MHz, 100dBµ, no modulation,
The pin 23 output
ON
ON
ON
ON
ON
ON
270 mVrms
IFBUFF-FM
S-meter output
V
V
V
V
FM-1
FM-2
FM-3
FM-4
No input, the pin 24 DC output,
no modulation
0.3
1.5
3.5
6.2
290
V
V
SM
SM
SM
SM
50dBµ, the pin 24 DC output,
no modulation
70dBµ, the pin 24 DC output,
no modulation
V
100dBµ, the pin 24 DC output,
no modulation
V
Muting
BW-mute
100dBµ, the bandwidth when V33 =
2V, no modulation
kHz
V
attenuation
Muting drive
output
V
-100 100dBµ, 0dBµ, the pin 33 DC output, ON
no modulation
0.00 0.03 0.20
MUTE
FM Front End Mixer Input
N-AGC on input
VNAGC
83MHz no modulation, the input such ON
that pin 2 becomes 2.0V or lower
A
A
ON
ON
B
B
ON OFF OFF
ON OFF OFF
81
88
95
dBµ
dBµ
W-AGC on
input
VWAGC
83MHz no modulation, the input such ON
that pin 2 becomes 2.0V or lower
104
110
116
(when the keyed AGC is 4.0V)
Conversion gain
A. V
83MHz, 80dBµ, no modulation, the
FE CF output
ON
ON
A
A
ON
ON
B
B
ON OFF OFF
ON OFF OFF
19
85
30
48 mVrms
Oscillator buffer
output
V
BUFFFM No input
OSC
110
165 mVrms
Noise Canceller Block - NC Input (pin 30)
Gate time
τ GATE
f = 1kHz, 1µs, with a 100mVp-o pulse ON
input
OFF
OFF
OFF
A
A
A
ON OFF OFF
ON OFF OFF
ON OFF OFF
55
40
µs
Noise sensitivity
SN
The 1kHz 1µs pulse input level such ON
that noise canceller operation starts
mVp-o
Noise canceller
effect
SN-NC
The pulse exclusion effect due to
noise canceller operation.
ON/
5
OFF
Repetition frequency for a 1µs pulse.
The ratio of the FM mode pin 15
output referenced to the pin 15 output
in 10kHz 150mVp-o AM mode.
Multipath Rejection Circuit - MRC Input (pin 27)
MRC output
V
V24 = 5V
ON
OFF B
OFF B
ON OFF OFF
ON OFF OFF
2.2
10
2.3
15
2.4
V
MRC
MRC-ON
MRC operating
level
The pin 32 input level such that pin 24 ON
= 5V and pin 27 = 2V, f = 70kHz
20 mVrms
AM Characteristics - ANT IN input
Practical
S/N-30
1MHz, 30dBµ, fm = 1kHz,
30% modulation, pin 15
1MHz, 74dBµ, fm = 1kHz,
30% modulation, pin 15
OFF
OFF
OFF B ON ON
OFF B ON ON
20
dB
sensitivity
Detection output
V
-AM
130
195
270 mVrms
O
Continued on next page.
No.A0229-3/6
LA1787NM
Continued from preceding page.
Switch settings
Ratings
typ
Parameter
Symbol
-AM31
Conditions
Unit
1
2
3
4
5
6
7
8
9
10 min
110
max
Pin 31 detection
output
V
1MHz, 74dBµ, fm = 1kHz,
30% modulation, pin 31
1MHz, 74dBµ, referenced to the
output, the input width such that the
output falls by 10dB, pin 15
1MHz, 74dBµ, fm = 1kHz,
30% modulation
OFF
OFF B ON ON
175
230 mVrms
O
AGC-F.O.M
V
OFF
OFF B ON ON
51
47
56
61
dB
AGC-FOM
Signal-to-noise
ratio
S/N-AM
OFF
OFF
OFF B ON ON
OFF B ON ON
52
dB
%
Total harmonic
distortion
THD-AM
1MHz, 74dBµ, fm = 1kHz,
80% modulation
0.3
1
S-meter output
V
AM-1
AM-2
No input
OFF
OFF
OFF
OFF B ON ON
OFF B ON ON
OFF B ON ON
0.0
4.8
0.2
6.0
0.5
7.3
V
V
SM
V
1MHz, 130dBµ, no modulation
SM
Oscillator buffer
output
V
BUFFAM1 No input, the pin 15 output
OSC
185
230
mVrms
Wideband AGC W-AGCsen1 1.4MHz, the input when V46 = 0.7V OFF
OFF B ON ON
OFF B ON ON
92
83
98
89
104
95
dBµ
dBµ
sensitivity
W-AGCsen2 1.4MHz, the input when V46 = 0.7V OFF
(during a seek)
SD sensitivity
SD-sen1AM 1MHz, the ANT input level such that OFF
the IF counter output turns on.
OFF B OFF OFF
OFF B OFF OFF
OFF B OFF OFF
24
24
30
30
36
36
dBµ
dBµ
SD-sen2AM 1MHz, the ANT input level such that OFF
the SD pin goes to the on state.
IF buffer output
V
-AM 1MHz, 74dbµ non-mod, the pin 23
OFF
200
290
mVrms
IFBUFF
output
*1: When the value of the resistor between pin 58 and ground is 200kΩ.
*2: When the value of the resistor between pin 58 and ground is 30kΩ.
Package Dimensions
unit : mm
3159A
No.A0229-4/6
LA1787NM
Block Diagram and Test Circuit
PCA00627
No.A0229-5/6
LA1787NM
Specifications of any and all SANYO Semiconductor products described or contained herein stipulate the
performance, characteristics, and functions of the described products in the independent state, and are
not guarantees of the performance, characteristics, and functions of the described products as mounted
in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an
independent device, the customer should always evaluate and test devices mounted in the customer's
products or equipment.
SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any
and all semiconductor products fail with some probability. It is possible that these probabilistic failures
could give rise to accidents or events that could endanger human lives, that could give rise to smoke or
fire, or that could cause damage to other property. When designing equipment, adopt safety measures
so that these kinds of accidents or events cannot occur. Such measures include but are not limited to
protective circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO Semiconductor products (including technical data,services) described
or contained herein are controlled under any of applicable local export control laws and regulations, such
products must not be exported without obtaining the export license from the authorities concerned in
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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO Semiconductor product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO Semiconductor 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 January, 2006. Specifications and information herein are subject
to change without notice.
PS No.A0229-6/6
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