SANYO LA1137NM, LA1137N, LA1136NM, LA1136N Datasheet

Ordering number: EN 3507

Monolithic Linear IC

LA1136N, 1136NM, 1137N, 1137NM

AM Tuners for Car Radios and Home Stereos

Overview

The LA1136N/NM and LA1137N/NM are high-performance AM electronic tuner ICs offering sophisticated functions. They are especially suited for use in car radio and home stereo (antenna: loop) applications.

Functions

MIX

OSC (with ALC)

IF amplifier

Detector

AGC (normal)

RF wide-band AGC

Auto search stop signal (Signal meter output)

Local oscillation buffer output

IF band switching circuit (for LA1136N only)

IF count buffer

Stop detector output (can be set independently)

Tweet prevention circuit

AGC (RF, IF) time constant switching circuit

IF AGC circuit

Pin-diode driver

AM stereo decoder IF output (for LA1136N only)

Circuit preventing incorrect seek operation

Features

Excellent cross modulation characteristic: Meets the requirements for preventing not only adjacent-channel interference but also interference caused by all channels within broadcast band.

Narrow-band signal meter output: Usable as auto search stop signal. Has linearity up to 100 dBµ.

Local oscillation buffer output: Facilitates designing of electronic tuner system, frequency display, etc.

OSC (with ALC): Improves tracking error because oscillation output is stabilized at a low level (350 mVrms: LA1137N) for varactor diode.

MIX: Double-balanced differential MIX meeting the requirements for preventing spurious interference, IF interference.

Good characteristic at high input: 130 dBµ input fm = 400 Hz 80%mod THD = 0.5% typ.

High S/N: Good S/N at medium input (55 dB typ).

Usable sensitivity: (S/N = 20 dB input): 25 dBµ (when using 2SK715 )

VCCvariation compensation: Less variation in gain, distortion: 8 to 12 V

AM stereo capability (LA1136N only)

IF band switching circuit on chip; controlled by microcontroller

Oscillating circuit for AM stereo; SUB S/N improved to 6dB

IF output for AM stereo decoder

Improved tweet characteristics: 10 dB increase, controlled by microcontroller

Improved cross modulation characteristics, especially sensitivity suppression characteristics: 15 dB improvement, wide-band AGC operation even for SW band interference

Improved low-frequency modulation distortion

Improved temperature characteristics: S-meter, SD sensitivity

Faster RF AGC response: RF: 1/3; IF: 1/8 (compared to predecessors)

Improved capability for driving external RF AGC transistors: I

max = 200 µA

Measures to prevent incorrect seek operation

IF count buffer on chip; controlled by microcontroller

Time constant switching circuit on chip for RF and IF AGC

IF AGC clear circuit on chip

Measures that prevent stopping one station too soon

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93097HA(II)/4281TS(US) No.3507-1/28

Package Dimensions

unit : mm

3067-DIP24S

LA1136N, 1136NM, 1137N, 1137NM

unit : mm

3112-MFP24S

unit : mm

3021B-DIP20S

[LA1136N]

[LA1137N]

SANYO : DIP24S

[LA1136NM]

SANYO : MFP24S

unit : mm

3036B-MFP20

[LA1137NM]

SANYO : DIP20Slim

Pdmax–Ta Pdmax–Ta

Mounted on 20 × 40 × 1.5 mm PCB

Independent IC

Allowable power dissipation, Pd max – mW

Ambient temperature, Ta – °C

Allowable power dissipation, Pd max – mW

Ambient temperature, Ta – °C

SANYO : MFP20

No. 3507-2/28

LA1136N, 1136NM, 1137N, 1137NM

Pdmax–Ta Pdmax–Ta

Mounted on 20 × 40 × 1.5 mm PCB

Independent IC

Allowable power dissipation, Pd max – mW

Ambient temperature, Ta – °C

Allowable power dissipation, Pd max – mW

Ambient temperature, Ta – °C

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Maximum supply voltage V Output voltage V

Input voltage V Current drain I

Flow-out current I Allowable power

dissipation

Operating temperature Topr –40 to +85 °C Storage temperature Tstg –40 to +125 °C

max Pin 19 (LA1136N), Pin 15 (LA1137N) 12 V

1 Pin 6 13.4 V

2 Pin 13 (LA1136N), Pin 10 (LA1137N) 15.5 V

Pd max Ta % 65°C (LA1136N),

Pd max1 Independent IC, Ta % 47°C (LA1136NM) 540 mW Pd max2 With PCB, Ta % 80°C (LA1136NM) 680 mW Pd max1 Independent IC, Ta % 63°C (LA1137NM) 540 mW Pd max2 With PCB, Ta % 77°C (LA1137NM) 680 mW

Pin 5 5.6 V Pin 15+6+10, V11= 0 (LA1137N)

Pin 6+13+19, V Pin 20 (LA1137N), Pin 24 (LA1136N) 2 mA

Ta % 77°C (LA1137N)

= 0 (LA1136N)

60 mA

680 mW

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Recommended supply

voltage Supply voltage range V

op 7.5to 10 V

No. 3507-3/28

LA1136N, 1136NM, 1137N, 1137NM

LA1136N, LA1136NM Operating Conditions at Ta = 25°C, VCC= 8 V, fr = 1 MHz, fm = 400 Hz, See specified Test Circuit

Parameter Symbol Conditions

Current drain

I I

Detection output V

1 Quiescent L L L O 22 38 52

2 130 dBµ L L L O 30 45 60

74 dBµ, 30% modulation L L L O –15.0 –12.0 –9.0 dBm

12 14 17 22

min typ max Unit

Signal-to-noise ratio S/N 74 dBµ, 30% modulation L L L O 49 54 dB

74 dBµ, 30% modulation,

AGC figure-of-merit AGC

reference output 10 dB below

LLLO 50 54 dBµ

input

Total harmonic distortion

Signal meter output voltage Stop detector sensitivity SD V

Local-oscillator buffer output voltage

IF buffer output voltage V IF count buffer output voltage V IF count buffer output leakage

voltage Antenna input level for RF AGC

ON and tweet prevention Antenna input for wideband AGC

ON Wideband/narrowband detector

output ratio (weak input) Pin-diode driver current I

THD1 74 dBµ, 80% modulation L L L O 0.4 1.0 THD2 130 dBµ, 80% modulation L L L O 0.5 2.0 V

1 Quiescent L L L O 0 0.3

2 130 dBµ L L L O 3.5 5.0 7.5

OSC

BUFF

BUFF 74 dBµ, zero modulation L L L O 530 750 1,000 mVrms

IFCB

IFCBL

= 3.5 V L H L O 26 32 38 dBµ

Quiescent L L L O 270 330 mVrms

30 dBµ, zero modulation L H H O 260 300 mVrms 74 dBµ, zero modulation L L L O 10 mVrms

ANT1 LLLL 56 62 68dBµ

Quiescent, 1.0 MHz receive

ANT2

signal, 1.4 MHz interference,

L L L O 92 98 104 dBµ

zero modulation

– 21 dBµ, 30% modulation L/H L L O 2 4 dB

ANTDV1

= 0.7 V L L L O 4.0 5.5 mA

Note) SW voltage:H=5V,L=GND, O = OPEN

LA1137N, LA1137NM Operating Characteristics at Ta = 25°C, VCC= 8 V, fr = 1 MHz, fm = 400 Hz, See specified Test Circuit

Parameter Symbol Conditions

1 Quiescent L L O 22 38 52

Current drain Detection output V

2 130 dBµ, zero modulation L L O 30 45 60

74 dBµ, 30% modulation L L O –15.0 –12.0 –9.0 dBm

Signal-to-noise ratio S/N 74 dBµ, 30% modulation L L O 50 55 dB

74 dBµ, 30% modulation,

AGC figure-of-merit AGC

reference output 10 dB below input

Total harmonic distortion Signal meter output

voltage Stop detector sensitivity SD V

Local-oscillator buffer output voltage

IF count buffer output voltage

IF count buffer output leakage voltage

THD1 74 dBµ, 80% modulation L L O 0.3 1.0 THD2 130 dBµ, 80% modulation L L O 0.4 2.0 V

1 Quiescent L L O 0 0.3

2 130 dBµ, zero modulation L L O 3.5 5 7.5

BUFF Quiescent L L O 290 350 mVrms

OSC

IFCB

IFCBL

= 3.5 V, zero modulation H L O 27 33 39 dBµ

30 dBµ, zero modulation H H O 260 300 mVrms

74 dBµ, zero modulation L L O 10 mVrms

Antenna input for RF AGC ON and tweet

ANT1 L L L 56 62 68 dBµ

prevention Antenna input for wide

band AGC ON Pin-diode driver current I

ANT2

ANTD

Quiescent, 1.0 MHz receive signal, 1.4 MHz interference signal, zero modulation

V1= 0.7 V L L O 4.0 5.5 mA

Note) SW voltage:H=5V,L=0V,O=open

Short the ammeter used to measure the pin-diode driver current when not in use.

11 13 18

min typ max Unit

LLO 485256dB

L L O 92 98 104 dBµ

No. 3507-4/28

LA1136N, 1136NM, 1137N, 1137NM

LA1136N, LA1136NM Test Circuit

Distortion meter

High frequency

signal level meter

IHF signal level meter

with bandpass filter

High frequency

signal level meter

Unit (resistance: Ω, capacitance: F)

S-meter output

Voltmeter

High frequency

signal level meter

No. 3507-5/28

LA1136N, 1136NM, 1137N, 1137NM

LA1137N, LA1137NM Test Circuit

Distortion meter

Signal meter

VHF signal

meter

Unit (resistance: Ω, capacitance: F)

S-meter output

VHF signal

meter

No. 3507-6/28

LA1136N Equivalent Circuit

LA1136N, 1136NM, 1137N, 1137NM

No. 3507-7/28

LA1137N Equivalent Circuit

LA1136N, 1136NM, 1137N, 1137NM

No. 3507-8/28

LA1136N, 1136NM, 1137N, 1137NM

LA1136N Sample Application Circuit

Unit (resistance: Ω, capacitance: F)

Pins connected to the controller

LA1136N

No. 3507-9/28

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