TA8132AN / AF , TA2012N / F

2002-10-30

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic

TA8132AN,TA8132AF,TA2012N,TA2012F

3V AM / FM IF + MPX

(For Digital Tuning System)

TA8132AN, TA8132AF and TA2012N, TA2012F are the AM / FM
IF+ST DET system ICs, which are designed for DTS radios.
These are included many functions and these can be used for
digital tuning system with IF counter.

Features

· Built-in AM / FM IF and FM stereo PLL multiplex decoder.
· Suitable for combination with digital tuning system which is

included IF counter.

One terminal type AM / FM IF count output (auto stop

signal) for IF counter of digital tuning system.

FM: 10.7MHz or 1.3375MHz (1 / 8 dividing)

changeable by external switch

AM: 450kHz

Built-in mute circuit for IF count output.

It is controlled by the IF request signal from digital
tuning system,

Pin(8) level: High come out

Low non output

Adjustable for IF count output sensitivity by external

resistance of pin(2).

· For adopting ceramic discriminator and ceramic resonator, it

is not necessary to adjust the FM quad detector circuit and
FM ST DET VCO circuit.

· S curve characteristics of FM detection output in TA8132AN, TA8132AF and TA2012N, TA2012F are reverse to

each other.

TA8132AN, TA8132AF: Reverse characteristic.
TA2012N, TA2012F: Normal characteristic.

· Built-in one terminal type AM low cut circuit.
· TA2053F is reverse pin type of TA2012F.
· Operating supply voltage range (Ta = 25°C)

CC (opr.)

= 1.8~8.0V

Weight
SDIP24-P-300-1.78: 1.2g (typ.)
SSOP24-P-300-1.00 : 0.31g (typ.)

TA8132AN / AF , TA2012N / F

2002-10-30

Application Note

1. How to control the IF count output signal (pin(9) output)

TUN LED

ON OFF

Come out

Non output

· Whether or not there is the IF count output signal (pin(9) output) is determined by the and of the pin(8)

control voltage: V

and tuning LED on / off switching.

In the condition of

: High (active high, V

= 0.8V (typ.))

TUN LED: ON (V

+2dBµV EMF (typ.))

the IF count output signal comes out from the pin(9).
In the case of the tuning LED function is not needed, it doesn't matter the pin(10) is opened.

· The output impedance of pin(9) is 1.5k (typ.) (cf.P.4)

It is possible to reduce the IF count output signal level to add the resistance between the pin(9) and the V

line.

· The signal waveform is the rectangular wave, and the level is 500mV

p-p

(typ.)

2. How to control the divider of FM IF

Switch

: 10.7MHz output

GND or OPEN: 1.3375MHz output (1 / 8 dividing)

3. How to adjust the IF count output sensitivity

· The IF count output sensitivity (search sensitivity)

Can be adjusted by varying the IF AMP gain for FM and varying the MIXER gain for AM.
This setting is made by changing the value of external resistance R

which is connected to

pin(2).

· However, this is only possible at the auto-tuning mode. (external voltage supplied to pin(8) is at high level.)

The original again returns while receiving a broadcast station (supplied voltage to pin(8) is at low level.)

TA8132AN / AF , TA2012N / F

2002-10-30

· The gain loss of FM IF AMP

0 10K (Note)

(10.7MHz)

-20dB

-1dB

ode

1 / 8 IF

(1.3375MHz)

-20dB

-1dB

(Note)

In the condition of the 1 / 8 IF mode, it is

possible to set up R

= (OPEN).

In the condition of IF mode, it is necessary to set up the value of R

under 10k. When the R

is over

10k it is feared that the mode is change to the 1 / 8 IF mode.

· The gain loss of AM MIXER

0 10K

-16dB

-1dB

4. AM low-cut circuit

· The AM low-cut action is carried out by the bypass of the high frequency component of

the positive-feedback signal at the AF AMP stage. The external capacitor: C

by-passes this component.

· The cut-off frequency f

is determine by the internal resistance 22k (typ.) and the

external capacitor C

as following;

(Hz)

· In the case of the AM low-cut function is not needed, set up the value of C

over 0.47µF.

In the condition of C

0.47µF, the frequency characteristic has flat response at the low frequency.

TA8132AN / AF , TA2012N / F

2002-10-30

5. AM local oscillator buffer output

· The output impedance of AM local oscillator buffer output pin (pin(4)) is 750 (typ.) (cf.P.3)
· It is possible to reduce the output level to add the resistance between the pin(4) and V

line. The signal

waveform is the rectangular wave, and the level is 500mV

p-p

OSC

= 1.45MHz, typ.)

· The higher local oscillation frequency (f

OSC

) to be, the lower buff output level to be owing to the load capacity.

So, in the case that it is connected to other circuits, take care of the input capacity of these circuits and stray
capacity of wire.

6. Tuning LED driver and stereo LED driver

The tuning LED driver and stereo LED driver don't have current limit resistance
shown in the right figure. So, it is necessary to add the current limit resistance:
R

, R

11.

· Set up the values of R

, R

to keep the drive currents ID10, ID11 under 10mA.

7.FM detection circuit

For the FM detection circuit,detection coil is able to use instead of ceramic discriminator.
Recommended circuit and recommended coil are as follows.
In this case, please take care that V

(lim.)

falls a little.

Turns

Test

Frequency

(pF)

-2 2-3 1-3 4-6

Wire

(mm

REF

10.7MHz 100

100

0.12 UEW

SUMIDA ELECTRIC CO., LTD
2153

-4095-189 or equivalent

TA8132AN / AF , TA2012N / F

2002-10-30

8. FM / AM switch and forced monaural switch

FM / AM switch over and stere / forced monaural switch over are done by
internal PNP transistors ON / OFF which are connected to pin(16) and pin
(17) respectively.
The threshold voltages of these PNP transistors are V

= V

CC,

and for

switching, we recommend to use mechanical switch.
(Direct short to V

line.)

In the case of the electrical switch over by transistor, set up V

(saturation voltage between collector and emitter) 50mV or less, otherwise
there are some cases that it does not become the AM mode and force
monaural mode.
When these external switches are ON, the currents which flow into pin(16)
and pin(17) are 100µA and 20µA respectively. (Typical value at V

= 3V)

Maximum Ratings

(Ta = 25°C)

Characteristic Symbol

Rating

Unit

Supply voltage

8 V

LED current

LED

LED voltage

LED

8 V

TA8132AN 1200

Power dissipation

TA8132AF

PD (Note)

400

Operating Temperature

opr

-25~75

°C

Storage temperature

stg

-55~150 °C

(Note): Derated above 25°C in the proportion of 9.6mW / °C for TA8132AN, TA2012N and

of 3.2mW / °C for TA8132AF, TA2012F.

TA8132AN / AF , TA2012N / F

2002-10-30

Electrical characteristics

Unless Otherwise Specified, Ta = 25°C, V

CC1

= 3V, SW

10k, SW

OFF

FM IF: f = 10.7MHz, f = ±22.5kHz, f

= 1kHz

AM: f = 1MHz, MOD = 30%, f

= 1kHz

MPX:

= 1kHz

Characteristic Symbol

Test

Cir

cuit

Test Condition

Min.

Typ.

Max.

Unit

(FM)

FM mode, V

= 0

11.0 14.0

Supply current

(AM)

AM mode, V

= 0

10.5 13.5

Input limiting
voltage

in (lim.)

-3dB limiting point

dBµV

EMF

Recovered output
voltage

= 80dBµV EMF

100

rms

Signal to noise
ratio

S / N

= 80dBµV EMF

65 dB

Total harmonic
distortion

THD 1

= 80dBµV EMF

0.2

AM rejection ratio

AMR

= 80dBµV EMF

LED on sensitivity

1mA

48 53 58

dBµV

EMF

IF f

(FM)

= 80dBµV EMF,

CC,

10.7

IF count
output
frequency

1 / 8 IF

(FM)

= 80dBµV EMF,

GND

1.3374 1.3375 1.3376

MHz

IF V

(FM)

= 61dBµV EMF,

CC,

350 500

IF count
output
voltage

1 / 8 IF

(FM)

= 61dBµV EMF,

GND

350 500

-p

GND,

510,

GND,

CC,

IF count output
sensitivity

sens. (FM)

510

CC,

dBµV

EMF

TA8132AN / AF , TA2012N / F

2002-10-30

Characteristic Symbol

Test

Cir

cuit

Test Condition

Min.

Typ.

Max.

Unit

Gain

= 26dBµV EMF

Recovered output
voltage

= 60dBµV EMF

100

rms

Signal to noise
ratio

S / N

= 60dBµV EMF

Total harmonic
distortion

THD 1

= 60dBµV EMF

1.0

LED on sensitivity

1mA

21 26 31

dBµV

EMF

1 f

OSC

= 1.45MHz

350

500

Local OSC buff.
output voltage

OSC

(AM)

2 f

OSC

= 27MHz

500

-p

IF count output
voltage

(AM) 1

= 39dBµV EMF, SW

ON 350

500

-p

GND,

510,

GND,

CC,

IF count output
sensitivity

sens. (AM)

510

CC,

dBµV

EMF

FM mode

0.6

Pin(19) output resistance

AM mode

TA8132AN / AF , TA2012N / F

2002-10-30

Characteristic Symbol

Test

Cir

cuit

Test Condition

Min.

Typ.

Max.

Unit

Input resistance

Output resistance

OUT

Max. composite
signal input voltage

in MAX

(stereo)

L + R = 90%, P = 10%
THD = 3%, SW

LPF: ON

350 mV

rms

= 100kHz

= 1kHz

Separation Sep

L + R = 135mV

rms

P = 15mV

rms

LPF: ON

= 10kHz

Monaural

THD

(monaural)

= 150 mV

rms

(mono)

0.2

Total
harmonic
distortion Stereo

THD

(stereo)

L + R = 135mV

rms

P = 15mV

rms

LPF: ON

0.2

Voltage gain

(MPX) 1

= 150mV

rms

(mono)

-5

-3

-1 dB

Channel balance

C.B.

= 150mV

rms

(mono)

-2 0 2 dB

ON V

(ON)

8 15

Stereo LED
sensitivity

OFF V

(OFF)

1 Pilot

input

2 6

rms

Stereo LED hysteresis

To LED turn off from
LED turn on

2 mV

rms

Capture range

C.R.

P = 15mV

rms

±1.3 %

MP X

Signal to noise ratio

S / N

= 150mV

rms

(mono)

78 dB

TA8132AN / AF , TA2012N / F

2002-10-30

· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor

devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability
Handbook" etc..

· The TOSHIBA products listed in this document are intended for usage in general electronics applications

(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or
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medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer's own risk.

· The products described in this document are subject to the foreign exchange and foreign trade laws.

· The information contained herein is presented only as a guide for the applications of our products. No

responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.

· The information contained herein is subject to change without notice.

000707EBA

RESTRICTIONS ON PRODUCT USE

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