TA2022AFNG
2004-11-17
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2022AFNG
1.5V AM/FM IF + MPX
TA2022AFNG is the AM / FM IF + MPX system IC, which is
developed for headphone radio in 1.5V use.
This is included many functions and this can be used for digital
tuning system with IF counter.
Features
• Suitable for combination with digital tuning system
which is included IF counter.
• Built−in AM / FM IF count output for IF counter of
digital tuning system.
FM: 10.7MHz
AM: 450kHz
• Adjustable for stop pulse sensitivity (in FM mode)
• For adopting ceramic discriminator, it is not necessary to
adjust the FM QUAD detector circuit.
• Built−in AM IF output for AM stereo
• MPX input for main signal is independent of that for pilot signal.
(MPX input for pilot signal is shared with AM input)
• MPX output is high−impedance in power off mode.
• Built−in power switch
• Low supply current (VCC = 1.2V, Ta = 25°C)
FM mode: ICC2 = 5.5mA (typ.)
AM mode: ICC3 = 3.7mA (typ.)
• Operating supply voltage range (Ta = 25°C)
V
CC (opr) = 0.95~2.2V
• Stereo operating supply voltage range (Ta = 25°C)
V
CC (opr) = 1.0~2.2V
Weight: 0.14 g (typ.)
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Terminal Explanation
Terminal Voltage: Typical Terminal Voltage at no Signal with The Test Circuit 1
(VCC = 1.2V, Ta = 25°C)
Terminal Terminal
Voltage (V)
No. Name
Function Internal Circuit
AM FM
1 VREF
Referential voltage
Bypass terminal for AM RF
and FM IF amplifier
0.9 0.9
2 OSC AM OSC 1.2 1.2
4 MIX Output of AM MIX
1.2 1.2
3 FM IF in
Imput of FM IF signal
・Input impedance
330Ω (typ.)
0.9 0.9
5 VCC ― ― 1.2 1.2
6 AM IF IN
Imput of AM IF signal
・Input impedance
3kΩ (typ.)
1.2 1.2
7 QUAD FM QUAD detector
1.2 1.2
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Terminal Terminal
Voltage (V)
No. Name
Function Internal Circuit
AM FM
8 AGC
・AM mode
AGC time constant is
determined by external
capacitor.
・FM mode
The sudden change of stop
pulse sensitivity is held in by
external capacitor.
― ―
9 GND ― ― 0 0
10 IF OUT
Output of IF count signal
In case of IF request mode, IF
count signal for IF counter is
taken from this terminal.
FM: VIF (FM) = 80mVp−p (typ.)
AM: VIF (AM) = 100mVp−p (typ.)
― ―
11 IF REQ
IF request switch
VCC: Receive mode
Open: IF request mode
FM stop pulse sensitivity can
be changed by connecting
RSEN in IF request mode.
RSEN should be smaller than
100kΩ
― ―
12 SP OUT
Output of stop pulse
VCO frequency can be
monitored, in case that this
terminal is connected with
GND through a resistor
(RVCO ≒ 100kΩ).
ON : VCO monitor
OPEN : SP OUT
― ―
13 ST IND
Stereo indicator terminal
・This terminal shared with
output of modulated AM IF
signal.
・AM IF output: 6mVrms
(RIF = 3kΩ, typ.)
・RIF should be smaller than
3kΩ. In case that RIF > 3kΩ,
internal biasing circuit doesn't
operate normally in AM mode.
― ―
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Terminal Terminal
Voltage (V)
No. Name
Function Internal Circuit
AM FM
14 LOUT
15 ROUT
Output of stereo signal
These terminals are high−
impedance in power off
mode.
0.5 0.5
16 LPF1 LPF terminar for phase detector
― ―
17 VCO
VCO
The temperature characteristic
of free running frequency is
+350ppm / °C.
Temperature coefficient: SH
― 1.2
18 LPF2A LPF terminal for synchronous
detector ― ―
19 LPF2B
LPF terminal for synchronous
detector and AM / FM switch
V
CC: AM mode
OPEN: FM mode
1.2 ―
21 PILOT IN
Input of FM stereo pilot signal
and AM signal
0.1 0.1
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Terminal Terminal
Voltage (V)
No. Name
Function Internal Circuit
AM FM
20 MPX IN Input of FM stereo main signal
― 0.1
22 DET OUT
Detector output circuit
・Output impedance (typ.)
AM: 10kΩ
FM: 1kΩ
0.6 0.6
23 PW SW
Power switch
VCC : IC on
OPEN/GND: IC off
1.2 1.2
24 AM RF IN
Input of AM RF signal
・Input impedance: 13kΩ
(typ., at no signal)
0.9 0
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Application Note
1. Power switch
It is necessary to connect an external pull−down resistor with the terminal of PW SW (pin (23)), in case that this
IC is turned on due to external noise etc.
2. Mode switch
The terminal of AM / FM changeover is pin(19).
In controlling the AM / FM mode with voltage, it is applied as follows.
V
CC : AM mode
OPEN: FM mode
In FM mode, care should be taken to eliminate influence due to external noise etc, because this terminal is
opened.
The leak current flows through this terminal, in the case that the terminal is connected to VCC line
independently, even through this IC is off mode (the terminal of PW SW (pin(23)) is off mode).
3. IF count output
IF count signal can be taken from IF output terminal (pin(10)), when IF request terminal (pin(11)) is connected
with GND through RSEN and stop pulse sensitivity is on.
Switch Condition
Pin(11) Pin(19)
Output
Frequency
Output
Voltage (typ.)
Output
Impedance (typ.)
FM OPEN OPEN 10.7MHz 80mVp−p
AM (RSEN ≤ 100kΩ) VCC 450kHz 100mVp−p
2 kΩ
Table.1 IF count output
4. FM stop pulse sensitivity
FM stop pulse sensitivity can be changed by
connecting an external resistor RSEN
between IF request terminal (pin(11)) and
GND. The gain of FM IF amplifier is
controlled by RSEN, and FM stop pulse
sensitivity is changed.
It is advised that RSEN is 100kΩ or less.
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5. MPX IN
This IC can attenuate only FM stereo main signal level. Because
MPX input for main signal (pin(20)) is independent of that for
pilot signal (pin(21), this terminal is shared with AM input).
Internal circuit of MPX in terminal (pin(20)) is shown in fig.2. FM
stereo main signal level can be attenuated by connecting an
external resistor RX. Because FM stereo main signal level is
attenuated by internal resistor (14kΩ and10kΩ) and resistor
RX. And it is applied to an emitter of transistor Q.
6. AM tweets
It is necessary to connect the capacitor Ct (about 330pF)
between VCC terminal (pin(6)) and DET OUT (pin(22)), in case that
AM tweets occurs by pattern layout. (Fig.3)
This Ct can also functions as phase compensation of MPX stage.
7. AM AGC
It is necessary to connect a capacitor C (about 68pF) between
VCC terminal (pin(8)) and AM IF IN terminal (pin(6)), in case that
AGC circuit doesn't operate normally. Because second harmonic
of local oscillator is applied AM IF terminal (pin(6)) by pettern
layout.
In case that capacitor (C = 68pF) is connected, AM stop pulse
sensitivity is delayed about 1dB.
Output DC voltage of AGC terminal (pin(8)) is V8 = 0.1V (typ.,
AM mode, at no signal).
8. Stereo indicator / AM IF output (for AM stereo)
• The terminal of pin(13) is built in stereo indicator function and
modulated AM IF signal output. In AM mode, RIF (3kΩ or
less) should be connected between VCC and pin(13) , or pin(13)
should connected to VCC directly. (Fig.5) In case that
R
IF >3kΩ or pin (13) is opened, this IC doesn't operate
normally in AM mode. Because transistor Q2 is saturated.
Fig.2 Internal circuit of MPX
in terminal
Fig.3 Countermeasures for AM
tweets
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• AM IF output
VIF (AM MOD) = 6mVrms (typ. RIF = 3kΩ)
The applications of this terminal are explained as follow.
(a) Method to use stereo indicator and AM IF output
External circuit is recommended as shown in fig.6.
(b) Method to use stereo indicator.
External circuit is recommended as shown in fig.7.
RIF is not needed in case that this IC is not use in AM
mode.
(c) Method to use AM IF output
External circuit is recommended as shown in fig.8.
(d) In case that functions of this terminal are not used.
External circuit is recommended as shown in fig.9.
RIF is not needed in case that this IC is not used in AM
mode.
Maximum Ratings (Ta = 25°C)
Characteristic Symbol Rating Unit
Supply voltage VCC 4.5 V
Stop pulse voltage VSP 4.5 V
Stop pulse current ISP 10 mA
Stereo indicator voltage VST 4.5 V
Stereo indicator current IST 10 mA
Power dissipation PD (Note) 500 mW
Operating temperature Topr −25~75 °C
Storage temperature Tstg −55~150 °C
Note: Derated above Ta = 25°C in the proportion of 4mW / °C.
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Electrical Characteristics
Unless Otherwise Specified
V
CC = 1.2V, Ta = 25°C, SW1: a, SW4: OPEN, SW5: a, SW6: a / b, SW7: ON
FM IF: f = 10.7MHz, fm = 1kHz, ∆f = ±22.5kHz, Vin = 80dBµV, EMF, SW2: ON, SW3: b
AM: f = 1MHz, fm = 1kHz, MOD = 30%, Vin = 60dBµV, EMF, SW2: OPEN, SW3: a
MPX: fm = 1kHz, fp = 19kHz, SW3:b
Characteristic Symbol
Test
Circuit Test Condition Min. Typ. Max. Unit
ICC1 PW off, SW1: b ― ― 5 µA
ICC2 FM mode, Vin = 0 ― 5.5 7.5
Supply current
ICC3
1
AM mode, Vin = 0 ― 3.7 5.5
mA
Input limiting sensitivity Vin (lim) −3dB limiting 43 48 53
dBµV
EMF
Recovered output voltage 1 VOD1 35 55 70 mVrms
Signal to noise ratio 1 S / N1 ― 60 ― dB
Total harmonic distortion 1 THD1
― 0.5 ― %
AM rejection ratio AMR MOD = 30% ― 40 ― dB
Stop pulse sensitivity 1 SP1 I12 = 0.5mA, SW6: a 50 55 60
Stop pulse sensitivity 2 SP2 I12 = 0.5mA, RSEN = 39kΩ
SW6: a, SW7: OPEN ― 64 ―
dBµV
EMF
FM IF
IF output voltage VIF (FM)
1
∆f = 0, SW7: OPEN ― 80 ― mVp−p
Gain GV V
in = 26dBµV EMF 15 27 ―
Recovered output voltage 2 VOD2 30 45 60
mVrms
Signal to noise ratio2 S / N2 ― 38 ― dB
Total harmonic distortion 2 THD2
― 1.5 ― %
Stop pulse sensitivitiy SP3 I12 = 0.5mA, SW6: a 25 30 35 dBµV
EMF
IF output voltage VIF (AM)
1
MOD = 0, SW7: OPEN ― 100 ― mVp−p
Oscillator voltage Vosc 30 55 ― mVrms
A M
Oscillator stop voltage Vstop
2
― ― 0.95 V
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Characteristic Symbol
Test
Circuit Test Condition Min. Typ. Max. Unit
Voltage gain 1 GV (FM) −1.5 +0.5 +2.5
Voltage gain 2 GV (AM) −0.5 +1.5 +3.5
Channel balance CB
Vin = 100mVrms (mono)
−2 ― +2
dB
Maximum composite signal
input level Vin (MAX) L + R =90%, P = 10%
THD = 3% ― 220 ― mVrms
Mono THD3 Vin = 100mVrms (mono) ― 0.2 0.5
Stereo THD4 L + R =90mVrms, P = 10mVrms ― 0.3 ―
Total harmonic
distortion
AM THD5 Vin = 100mVrms ― 0.2 ―
%
fm = 100Hz ― 36 ―
fm = 1kHz 25 35 ―
Separation SEP
L + R =90mVrms
P = 10mVrms
fm = 10kHz ― 34 ―
dB
On ST
(ON) ― 5.5 8
Stereo indicator
sensitivity Off ST
(OFF)
Pilot signal input
I13 = 0.5mA, SW5: a 2 4 ―
mVrms
Stereo indicator hysteresis VH To indicator turn off from
turn on ― 1.5 ― mVrms
Capture range CR P = 10mVrms, fp = 19kHz ― ±7 ― %
M P X
Signal noise ratio 3 S / N3
1
Vin = 100mVrms (mono) ― 65 ― dB
On current I23 SW1: c 5 ― ― µA
Power switch
Off voltage V23 SW1: d 0 ― 0.3 V
AM mode on current I19 SW3: c 50 ― ― µA
FM mono mode on voltage V16 SW4: ON ― 0.1 ― V
IF request off voltage V11
2 VCC = 0.95V
SW7: ON 0.9 ― ― V
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Coil Data
Turns
Coil Test
Frequency
L
(µH)
Co
(pF) Qo 1−22−3 1−3 4−6
Wire
(mmφ)
Reference
(coil no.)
L AM OSC 796kHz 100 ― 85 13 55 ― ― 0.06UEW (S)4187−144
T AM IFT 450kHz ― 180 65 ― ― 184 29 0.05UEW (S)4161−242
(S): SUMIDA ELECTRIC Co., LTD.
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Characteri stic Curve
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MPX
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Package Dimensions
Weight: 0.14g (typ.)
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• The information contained herein is subject to change without notice.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of
TOSHIBA or others.
• 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
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
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.
• TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced
and sold, under any law and regulations.
030619EBA
RESTRICTIONS ON PRODUCT USE
About solderability, following conditions were confirmed
• Solderability
(1) Use of Sn-63Pb solder Bath
· solder bath temperature
= 230°C
· dipping time
= 5 seconds
· the number of times = once
· use of R-type flux
(2) Use of Sn-3.0Ag-0.5Cu solder Bath
· solder bath temperature
= 245°C
· dipping time
= 5 seconds
· the number of times = once
· use of R-type flux
