TK10651MCTX [TOKO]
暂无描述;
TOKO, INC 
TK10651
LOW VOLTAGE COMPANDOR
FEATURES
APPLICATIONS
■ Data and Voice Inputs
■ Portable Instrumentation
■ Cordless Telephones
■ Handy Talkies
■ Data and Voice Outputs
■ Low Supply Current
■ Regulated Output
■ Interphones
■ Wide Operating Voltage Range
■ Low Standby Current
■ Amateur Radio Transceivers
■ Microphone Amplifier
■ IDC Circuit (Instantaneous Deviation Control)
TK10651
20
19
18
17
16
15
14
13
1
2
3
4
5
6
FILTER OUT
V
CC
DESCRIPTION
FILTER IN
EXP OUT
EXP RECT
DATA OUT
COMP OUT
TK10651 is a noise reduction IC developed mainly for
cordless phones. It is also used for voice and data
communications. It has a built-in compressor circuit to
increase the average modulation level and an expander
circuit to reduce the noise level. The expander restores the
original dynamics of the input signal. The result is a high
quality signal transmission with low noise. Among the
many functions included, analog switching of the input and
output signal is particularly useful in cordless telephones.
Separate data input and output are provided. The audio
signal path can be muted during data transmission. The
signal path used for data transmission bypasses the com-
pressor and expander circuits.
DATA IN
C-DFC
EXP NF
EXP IN
10651M
COMP RECT
7
8
EXP REF
COMP NF
COMP IN
EXP MUTE
THROUGH
COMP MUTE
COMP REF
GND
9
12
11
10
BLOCK DIAGRAM
The TK10651 is available in the SSOP-20 (MFP20)
surface mount package.
EXPANDER
INPUT AMP
EXP NF
EXP IN
30 kΩ
GND
ORDERING INFORMATION
+
THROUGH
SW
COMP REF
+
SUM
AMP
TK10651
TO V
ref
FILTER OUT
EXP RECT
BUF
AMP
TO V
ref
Tape/Reel Code
30 kΩ
30 kΩ
100 kΩ
MIC AMP
+
COMP IN
COMP NF
THROUGH
SW
SUM
AMP
FILTER IN
Package Code
+
TO V
ref
3.3 kΩ
51 kΩ
TO V
ref
+
PACKAGE CODE
M: Surface Mount
TAPE/REEL CODE
100 kΩ
COMP OUT
COMP MUTE
TL: Tape Left
100 kΩ
100 kΩ
January 2000 TOKO, Inc.
Page 1
TK10651
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .........................................................10 V
Power Dissipation (Note 1) ................................410 mW
Junction Temperature .......................................... 150 °C
Operating Voltage Range..............................2.4 to 7.0 V
Input Frequency ................................................. 100 kHz
Storage Temperature Range ...................-55 to +150 °C
Operating Temperature Range .................. -20 to +70 °C
Lead Soldering Temp. (10 sec.).......................... 235 °C
TK10651 ELECTRICAL CHARACTERISTICS
Test conditions: V = 3.0 V, f = 1.0 kHz, R = 10 kΩ, T = 25 °C, unless otherwise specified.
CC
L
A
SYMBOL
ICC
PARAMETER
TEST CONDITIONS
MIN
TYP
4.00
1.30
MAX
6.50
1.45
UNITS
mA
Supply Current
No signal
VTH
Threshold Voltage
Pins 11,12,13
1.15
V
Compressor
ZINC
Input Impedance
90
8
120
kΩ
VOC = 300 mVrms
VIN = 0 dB, (Note 2)
VINC
Standard Input Voltage
12.5
17
mVrms
VIN = -20 dB, (Note 2)
VIN = -40 dB, (Note 2)
-0.5
-1.0
0
0
+0.5
+1.0
dB
dB
∆GC
∆GTC
Gain Error
VIN = 0 dB, Pin 12 grounded,
(Note 2)
Through On/Off Difference
-1.5
0
+1.5
dB
THDC
VNOC
Total Harmonic Distortion
Output Noise Voltage
VIN = 0 dB
0.5
3.0
1.0
5.5
%
Rg = 620 Ω, (Note 2)
mVrms
VIN = 0 dB, Pin 11 grounded,
(Note 2)
ATTC
VLIMC
GVD
Mute Attenuation
Limiting Voltage
60
80
1.35
0
dB
VP-P
dB
1.15
-0.5
1.50
+0.5
Voltage Gain for DATA
Terminal
Pin 4 voltage = 300 mVrms
THD = 10% Point
Maximum Output Voltage for
DATA Terminal
VOUT(MAX)D
CTC
800
900
-35
mVrms
dB
Exp VIN = 30 mVrms,
Rg = 620 Ω, (Note 2)
Cross Talk
-30
Note 1: Power dissipation is 410 mW in free air. Derate at 3.3 mW/°C for operation above 25 °C.
Note 2: Evaluated by CCITT standard P.53 noise filter.
Page 2
January 2000 TOKO, Inc.
TK10651
TK10651 ELECTRICAL CHARACTERISTICS (CONT.)
Test conditions: V = 3.0 V, f = 1.0 kHz, R = 10 kΩ, T = 25 °C, unless otherwise specified.
CC
L
A
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Buffer Amplifier
GVB
Voltage Gain
VIN = 300 mVrms
-0.5
0
+0.5
dB
dB
VIN = 300 mVrms, f = 3 kHz
VIN = 300 mVrms, f = 30 kHz
VIN = 300 mVrms
-3
∆f
Frequency Characteristics
-60
0.02
700
dB
THDB
Total Harmonic Distortion
Maximum Output Voltage
0.1
%
VOUT(MAX)B
Expander
THD = 10% Point
550
110
mVrms
VIN = 30 mVrms = 0 dB,
(Note 2)
VOUTE
Standard Output Voltage
Gain Error
130
160
mVrms
VIN = -10 dB, (Note 2)
VIN = -20 dB, (Note 2)
VIN = -30 dB, (Note 2)
-0.5
-1.0
-1.5
0
0
0
+0.5
+1.0
+2.0
dB
dB
dB
∆GE
VIN = 0 dB, Pin 12 grounded,
(Note 2)
∆GTE
Through On/Off Difference
-2.5
-1.0
+0.5
dB
THDE
VNOE
Total Harmonic Distortion
Output Noise Voltage
VIN = 0 dB
0.5
10
1.5
30
%
Rg = 620 Ω, (Note 2)
µVrms
VIN = 0 dB, Pin 13 grounded,
(Note 2)
ATTE
Attenuation
60
80
dB
VOUT(MAX)E
GVI
Maximum Output Voltage
THD = 10% Point
VIN = 0 dB
700
14.5
450
800
15.5
500
mVrms
dB
Voltage Gain for Input Amp.
Maximum Output Voltage
16.5
-60
VOUT(MAX)I
THD = 10% Point
mVrms
Comp VIN = VINC
,
CTE
Cross Talk
-70
dB
Rg = 620 Ω, (Note 2)
Note 2: Evaluated by CCITT standard P.53 noise filter.
January 2000 TOKO, Inc.
Page 3
TK10651
TEST CIRCUIT
1.0 µF
FILTER
OUT
V
CC
V
CC
10 µF
10 kΩ
18000 pF
+
1.0 µF
10 kΩ
10 kΩ
10 kΩ
FILTER
IN
EXPAND
OUT
6800 pF
620 Ω
1.0 µF
10 kΩ
100
kΩ
1000 pF
COMPRESS
OUT
EXP
1.0 µF
0.1 µF
2.2 µF
10 kΩ
620 Ω
100 kΩ
+
2.2 µF
DATA
IN
DATA
OUT
100 kΩ
10 kΩ
100 kΩ
50 pF
51 kΩ
+
10 kΩ
22 µF
1.0 µF
COMP
0.047 µF
EXPAND
IN
2.2 µF
620
100 kΩ
51 kΩ
+
9.1 kΩ
REG
3.3 kΩ
0.47 µF
4.7 µF
0.047 µF
COMPRESS
IN
620 Ω
MUTE
100 kΩ
EXPAND
THROUGH
MUTE
REG
4.7 µF
COMPRESS
Switch pins priority order:
High > pins 11 and 13 > pin 12 > low.
SWITCH PIN
HIGH (OPEN OR VCC
)
LOW (GND)
Pin 11
Pin 12
Pin 13
Comp Mute OFF
Compandor
Comp Mute ON
Through
Exp Mute OFF
Exp Mute ON
Page 4
January 2000 TOKO, Inc.
TK10651
TYPICAL PERFORMANCE CHARACTERISTICS
DC CHARACTERISTICS
SUPPLY CURRENT vs. SUPPLY
VOLTAGE
REFERENCE VOLTAGE vs.
SUPPLY VOLTAGE
1.5
1.48
1.46
1.44
1.42
NO SIGNAL
6
5
4
3
2
1.4
2
2
3
4
5
6
(V)
7
8
3
4
5
6
(V)
7
8
V
V
CC
CC
REFERENCE VOLTAGE vs.
AMBIENT TEMPERATURE
SUPPLY CURRENT vs. AMBIENT
TEMPERATURE
1.5
V
= 3.0 V
CC
V
= 3.0 V
6
5
4
3
2
CC
NO SIGNAL
1.48
1.46
1.44
1.42
1.4
100
-40 -20
0
20 40 60 80
(°C )
-40 -20
0
20 40 60 80 100
T
T
(°C )
A
A
EXPANDER AC CHARACTERISTICS
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
OUTPUT REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
0
-10
V
f
= 3.0 V
CC
f
= 1.0 kHz
IN
2
1
= 1.0 kHz
IN
100 mV(rms) -20
REFERENCE
LEVEL
-30
-40
-50
-60
0
-70
-80
-1
-90
-100
-110
-2
-80 -70 -60 -50 -40 -30 -20 -10
2
3
4
5
6
(V)
7
8
30 mV(rms)
V
CC
V
(dB)
IN
January 2000 TOKO, Inc.
Page 5
TK10651
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
EXPANDER AC CHARACTERISTICS (CONT.)
OUTPUT REFERENCE VOLTAGE
vs. AMBIENT TEMPERATURE
DISTORTION vs.
INPUT VOLTAGE
10
5
V
= 3.0 V
V
f
= 3.0 V
CC
= 1.0 kHz
CC
= 1.0 kHz
2
f
IN
IN
1
0
2
1
0.5
-1
-2
REFERENCE
LEVEL
0.2
0.1
-40 -20
0
20 40 60 80 100
(°C )
-50 -45 -40 -35 -30 -25 -20
(dB)
V
T
IN
A
COMPRESSOR AC CHARACTERISTICS
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
INPUT REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
0
REFERENCE
LEVEL
f
= 1.0 kHz
2
1
IN
300 mv(rms)-10
V
f
= 3.0 V
CC
-20
-30
-40
-50
= 1.0 kHz
IN
0
-1
-2
-60
-70
-120 -100 -80
-60
-40
-20
2
3
4
5
6
7
8
V
(dB)10 mV(rms)
V
(V)
IN
CC
INPUT REFERENCE VOLTAGE
vs. AMBIENT TEMPERATURE
DISTORTION vs.
INPUT VOLTAGE
10
5
V
= 3.0 V
V
= 3.0 V
CC
= 1.0 kHz
CC
f = 1.0 kHz
IN
2
f
IN
1
0
2
1
.5
-1
-2
.2
.1
REFERENCE LEVEL
-40 -20
0
20 40 60 80 100
(°C )
-70 -65 -60 -55 -50 -45 -40 -35 -30
V
(dB)
T
IN
A
Page 6
January 2000 TOKO, Inc.
TK10651
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
THIRD ORDER LPF CHARACTERISTICS
OUTPUT VOLTAGE VS. THIRD
ORDER LPF INPUT VOLTAGE
OUTPUT VOLTAGE vs. THIRD
ORDER LPF INPUT FREQUENCY
10
0
V
= 3.0 V
0
-10
-20
-30
-40
-50
-60
-70
CC
= 1.0 kHz
f
IN
-10
-20
-30
-40
-50
-60
-70
0.1 0.2 0.5
1
2
5
10 20 50 100
-90 -80 -70 -60 -50 -40 -30 -20 -10
(dBV)
0
V
f
(kHz)
IN
IN
MODULATION LEVEL vs.
COMPRESSOR INPUT
USING THE COMPANDOR TO IMPROVE S/N
7
6
5
4
3
2
V
= 3.0 V
This section provides an example of using the compandor
to improve S/N in a narrow band FM communication
system. In the test configuration below, the compressor
modulation level was measured as a function of the input
voltagetodemonstrate theimprovementresultingfromthe
use of the compressor. An audio signal is connected into
the compressor and the output is measured with the
modulation meter connected to the external modulation
input of the FM signal generator. The compressor's refer-
ence input level was set to produce ±3.0 kHz frequency
deviation. As shown in the graph on the right, the peak
deviation remains the same when the compressor is used,
but a wider input range is obtained. The built-in character-
istics of the IDC circuit limit the maximum frequency devia-
tion to ±4.5 kHz.
CC
f
= 1.0 kHz
MOD
COMPRESSOR
THROUGH
1
0
0.1 0.2 0.5 1 2
5
1020 50 100
V
(mVrms)
IN
TEST CONFIGURATION
FM
SG
FM IF IC
TK10487
TK10651
EXP
TK10651
COMP
V
January 2000 TOKO, Inc.
Page 7
TK10651
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
Thefollowing graphshowsthecharacteristicswhentheRF
input is weak (RF IN = 30 dBµ). There is a great difference
when the compandor is used with a weak RF input. When
thethroughfunctionisused(noisereductionoff),theoutput
is lost in noise as the compressor input drops below –80
dBV; but when the compandor function is used, it remains
level below –100 dBV. With a weak RF input, dynamic
range is extended by 30 dB.
USING THE COMPANDOR TO IMPROVE S/N (CONT.)
Theimprovementresultingfromtheexpanderisexpressed
by measuring the overall characteristics of the FM IF
System (TK10487M). The signal generator was switched
to internal modulation and the output is defined as 0 dB
when the RF input = 80 dBµ. As the graph below indicates,
the noise is reduced when the expander is used, and good
S/N ratio is maintained even when the RF signal input is
weak.
OUTPUT VOLTAGE RATIO
(FOR WEAK RF INPUT SIGNAL)
vs. COMPANDOR INPUT
OUTPUT VOLTAGE RATIO vs.
COMPANDOR RF INPUT
10
0
SIGNAL
V
= 3.0 V
= 10.245 MHz
= 1.0 kHz
CC
V
= 3.0 V
0
-10
-20
-30
-40
-50
-60
-70
-80
CC
= 10.245 MHz
f
OSC
f
f
OSC
DEV = ± 3.0 kHz
MOD
FILTER : CCITT P.53
IF IC : TK10487M
NO PRE-EMPHASIS
OR DE-EMPHASIS
-10
-20
MOD
FILTER : CCITT P.53
IF IC :TK10487M
f
= 1.0 kHz
NO PRE-EMPHASIS
OR DE-EMPHASIS
-30
-40
-50
-60
-70
SOLID LINE:
COMPRESSOR
DASHED LINE: THROUGH
SOLID LINE:
COMPRESSOR
DASHED LINE: THROUGH
NOISE
-80
-20
0
20
40
60
80 100
-110 -90 -70 -50 -30 -10
(dBV)
V
(dBu)
V
IN
IN
Finally, theoverallcharacteristicsaremeasuredusingboth
thecompressorandtheexpander. Theoutputismeasured
when the compressor's input is at –40 dBµV and the
frequency deviation is ±3.0 kHz.
The effects of the compandor within a narrow band FM
communicationssystemwasdemonstratedwhileacoaxial
cable was used in place of transmission through free
space. The signal source was an FM signal generator
althoughtherearesomedifferenceswhenactualtransmis-
sion is through free space. However, the test configuration
used in this experiment is useful in understanding the
effects of the compandor.
The graph below shows the characteristics when the RF
input is strong (RF IN = 80 dBµ). The dynamic range is
increased by more than 12 dB when the compandor is
used.
OUTPUT VOLTAGE RATIO (FOR
STRONG RF INPUT SIGNAL)
vs. COMPANDOR RF INPUT
10
V
= 3.0 V
= 10.245 MHz
= 1.0 kHz
CC
0
-10
-20
-30
-40
-50
-60
-70
f
OSC
f
MOD
FILTER : CCITT P.53
IF IC :TK10487M
NO PRE-EMPHASIS
OR DE-EMPHASIS
SOLID LINE:
COMPRESSOR
DASHED LINE: THROUGH
-80
-120
-90 -70 -50 -30 -10
(dBV)
V
IN
Page 8
January 2000 TOKO, Inc.
TK10651
APPLICATION INFORMATION
COMPRESSOR
COMPRESSOR MICROPHONE AMPLIFIER
By placing the data input pin following the compressor
circuit, a data signal can be transmitted without being
compressed.Audiofromthemicrophonecanbeconnected
directly to the IC, because it passes through the built-in
microphoneamplifier(thegainisadjustable). Sincethereis
a built-in limiter to prevent overmodulation, it is not neces-
sary to add an external Instantaneous Deviation Control
(IDC) circuit; furthermore, a Low Pass Filter (LPF) up to the
third order can be constructed using the buffer amplifier.
When a data signal is being transmitted, the unneeded
audio can be cut by engaging the mute switch.
The input pin connects to the reference voltage through a
100 kΩ bias resistor, therefore external bias is not neces-
sary. The microphone amplifier gain can be adjusted by
connecting an external resistor to NF pin 7. The gain is
highest when no resistor is added, and the standard input
level is 3 mV. When an external resistor of 9.1 kΩ is added,
thestandardinputlevelisabouta10mV;whentheexternal
resistor value is 68 kΩ, the standard input level is 30 mV.
The input can accommodate a variety of microphones by
adjusting the gain to match the microphone's output volt-
age.
The user should set the gain and input level so that the
output level at pin 3 is normally 300 mV (standard level).
EXPANDER
Awiderangeofapplicationsaremadepossiblebecauseall
of the input amplifier pins are accessible. A LPF of up to the
third order can be constructed at the input, and with an
external resistor, it can be used as an amplifier. If the data
out pin is used for the output, a data signal can be extracted
without passing through the expander. During data trans-
mission, the audio signal system can be inhibited by using
the mute switch.
100 k
VREF
COMP IN
+
-
~10 mV
8
51 k
COMP NF
3.3 k
9.1 k
7
7
100 k
VREF
COMP IN
8
+
-
~3 mV
51 k
3.3 k
COMP NF
7
January 2000 TOKO, Inc.
Page 9
TK10651
APPLICATION INFORMATION (CONT.)
RECTIFIER
COMPRESSOR DATA INPUT
Therectifier'ssmoothingcapacitorpins(6&18), determine
thesmoothingcharacteristicsandthetimeconstantsof the
compressor and the expander. The time constant is deter-
mined by the external capacitor value and the internal 10
kΩ resistance.
An inverting amplifier is used at the DATA input. The
internal input resistors are 100 kΩ, and the DC bias (V
isabout1.5V.Themaximumloadattheoutputpinis10kΩ.
)
REF
100 k
COMP OUT
100 k
+
FROM COMP
3
-
RECTIFIER
100 k
TO V
REF
10 k
TO GAIN CELL
4
DATA IN
BUFFER AMPLIFIER
Up to a third order LPF (for example, a splatter filter) can be
constructed using this amplifier. The maximum load at the
output pin is 10 kΩ. The non-inverting input of the amplifier
isnotbiasedinternally,thereforeanexternalbiasisneeded
(for example Pin 3 Vref) whenever this pin is not direct-
coupled from the compressor output pin (pin 3).
COMPRESSOR SUMMING AMPLIFIER
Thecompressorsummingamplifier(SUMAMP)musthave
unity DC gain and the AC open loop gain is high. Since the
feedback resistors are internal to the device, only one
external capacitor is needed between pin 5 and GND. The
cutoff frequency is determined by the external capacitor
and the internal resistors.
1
3 kHz LPF
18000 p
C-DCFB
5
10 k 10 k 10 k
2
+
-
100 k
30 k
30 k
6800 p
1000 p
TO V
REF
+
-
Page 10
January 2000 TOKO, Inc.
TK10651
APPLICATION INFORMATION (CONT.)
REFERENCE VOLTAGE SOURCE
(PINS 9 AND 14)
EXPANDER INPUT AMPLIFIER
The non-inverting and inverting input pins as well as the
output pins are available, and can be used as a buffer amp
or filter amp. A data signal can be obtained from the output
pin, without passing through the expander. The input level
and amplifier gain should be set to provide 180 mV(rms)
standardlevelatthedataoutputpin (pin17). Theexpander
input amplifier is not DC biased internally, therefore a bias
Pin 9 is the reference voltage pin for the compressor and
pin 14 is the reference voltage pin for the expander. The
reference voltages are obtained from an internal band gap
reference and used as the bias source for each section.
SWITCH CIRCUIT (PINS 11, 12, and 13)
voltage from the expander's V
pin (pin 14) should be
REF
used. The maximum allowable load at the output pin is 10
kΩ.
Thecompressor'sandexpander'smutepinsandthethrough
pin (noise reduction is off) are pulled up by internal current
sources, therefore they do not need an external pull up.
Concerning the switching logic, refer to the table in the Test
Circuit section.
EXP
OUT
51 k
DATA OUT
17
EXP NF
10 k
16
EXP
+
IN
-
15
100 k
11,12,13
TO V
REF
AMPLIFIER (GAIN = 6)
DATA
OUT
17
EXP NF
16
EXP
IN
+
-
18000 p
10 k 10 k 10 k
15
100 k
6800 p
REF
1000 p
TO V
3 kHz LPF
January 2000 TOKO, Inc.
Page 11
TK10651
PACKAGE OUTLINE
Marking Information
SSOP-20 (MFP20)
0.5
Marking
TK10651
10651
Mark
11
20
AAAAA
YYY
e
1.0
Recommended Mount Pad
KR
10
1
Lot No.
Country of Origin
0.5
10.2
0.15
0.05
6.0 ±0.3
0.35
0.10
M
0.1
e
1.0
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
Western Regional Office
Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Eastern Regional Office
Toko America, Inc.
107 Mill Plain Road
Danbury, CT 06811
Tel: (203) 748-6871
Fax: (203) 797-1223
Semiconductor Technical Support
Toko Design Center
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
Fax: (719) 528-2375
Fax: (847) 699-7864
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its
products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of
third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
Page 12
January 2000 TOKO, Inc.
© 1999 Toko, Inc.
IC-231-TK11031
0798O0.0K
Printed in the USA
All Rights Reserved
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