TECHNICAL DATA
TELEPHONE SPEECH NETWORK
WITH DIALER INT`ERFACE
KKA1062/1062A
FEATURES
PIN CONNECTION
- Low DC line voltage; operates down to 1.6V (excluding
polarity guard)
- Voltage regulator with adjustable static resistance
- Provides a supply for external circuits
- Symmetrical high-impedance inputs (64 kΩ) for
dynamic, magnetic or piezo-electric microphones
- Asymmetrical high-impedance input (32 kΩ) for electret
microphones
- DTMF signal input with confidence tone
1
16
SLPE
GAS1 2
15
AGC
GAS2
3
14
REG
OR
4
13
VCC
GAR
5
12
MUTE
MIC-
6
11
DTMF
MIC+
7
10
IR
STAB
8
9
VEE
LN
- Mute
input for pulse or DTMF dialing
- KKA1062: active HIGH (MUTE)
- KKA1062A: active LOW (MUTE)
- Receiving amplifier for dynamic, magnetic or
piezo-electric earpieces
- Large gain setting range on microphone and earpiece
amplifiers
- Line loss compensation (line current dependent) for
microphone and earpiece amplifiers
- Gain control curve adaptable to exchange supply
- DC line voltage adjustment facility
KKA1062
or
BT1062A
KKA1062A
DESCRIPTION
The KKA1062 and KKA1062A are integrated circuits that perform all speech and line interface functions required in fully
electronic telephone sets. They perform electronic switching between dialing and speech. The ICs operates at line voltage down
to 1.6 V DC (with reduced performance) to facilitate the use of more telephone sets connected in parallel.
All statements and values refer to all versions unless otherwise specified. The KKA1062 (KKA1062A) is packaged in a standard
16-pin plastic DIP and special plastic DIP with internal heatsink is also available.
QUICK REFERENCE DATA
Characteristic
Symbol
Test Condition
Min
Typ
Max
Unit
Line Voltage
VLN
Iline = 15mA
3.55
4.0
4.25
V
Operating Line Current
I line
140
mA
2.0
Normal Operation
11
with Reduced Performance
1
Internal Supply Current
I CC
VCC = 2.8V
Supply Voltage for Peripherals
VCC
Iline= 15mA
Ip= 1.2mA
Ip= 0mA
Voltage Gain
0.9
Vdc
11
mA
1.35
mA
V
2.2
2.2
2.7
3.4
GV
microphone amplifier
44
52
dB
receiving amplifier
20
31
dB
Line loss compensation
Gain Control
∆GV
Exchange Supply Voltage
Vexch
36
60
V
Exchange Feeding bridge Resistance
Rexch
0.4
1
kΩ
5.8
dB
KKA1062/1062A
BLOCK DIAGRAM
VCC
LN
13
IR
1
10
5
GAR
4
BT1062A
KKA1062A
QR
+
MIC+
7
+
2
MIC-
6
-
-
+
DTMF
11
MUTE
+
dB
3
-
(1)
12
SUPPLY AND
REFERENCE
CONTROL
CURRENT
LOW VOLTAGE
CIRCUIT
CURRENT
REFERENCE
9
VEE
14
REG
GAS1
15
8
AGC
STAB
(1) Pin 12 is active HIGH (MUTE) for KKA1062.
Fig.1 Block diagram for KKA1062A
16
SLPE
GAS2
KKA1062/1062A
FUNCTIONAL DESCRIPTION
Supplies VCC, LN, SLPE, REG and STAB
Power for the IC and its peripheral circuits is usually obtained from
the telephone line. The supply voltage is delivered from the line via a
dropping resistor and regulated by the IC. The supply voltage VCC
may also be used to supply external circuits e.g. dialing and control
circuits.
Decoupling of the supply voltage is performed by a capacitor
between VCC and VEE . The internal voltage regulator is decoupled by
a capacitor between REG and VEE.
The DC current flowing into the set is determined by the exchange
supply voltage Vexch , the feeding bridge resistance Rexch and the DC
resistance of the telephone
line Rline .
The circuit has internal current stabilizer operating at a level
determined by a 3.6 kΩ resistor connected between STAB and VEE
(see Fig.6). When the line current (Iline) is more than 0.5mA greater
than the sum of the IC supply current (ICC) and the current drawn by
the peripheral circuitry connected to VCC (Ip) the excess current is
shunted to VEE via LN.
The regulated voltage on the line terminal (VLN) can be calculated as:
VLN = Vref + ISLPE x R9
VLN = Vref + {(Iline - ICC - 0.5 x 10-3A) - Ip} x R9
Vref is an internally generated temperature compensated reference
voltage of 3.7V and R9 is an external resistor connected between
SLPE and VEE.
In normal use the value of R9 would be 20?.
Changing the value of R9 will also affect microphone gain, DTMF
gain, gain control characteristics, sidetone level, maximum output
swing on LN and the DC characteristics (especially at the lower
voltages).
Fig.2 Equivalent impedance circuit
At line currents below 9mA the internal reference voltage is
automatically adjusted to a lower value (typically 1.6V at 1mA). This
means that more sets can be operated in parallel with DC line voltage
(excluding the polarity guard) down to an absolute minimum voltage
of 1.6V. At line currents below 9mA the circuit has limited sending
and receiving levels. The internal reference voltage can be adjusted
by means of an external resistor (RVA). This resistor when connected
between LN and REG will decrease the internal reference voltage
and when connected between REG and SLPE will increase the
internal reference voltage.
Microphone inputs MIC+ and MIC- and gain pins
GAS1 and GAS2
The circuit has symmetrical microphone inputs. Its input impedance
is 64 kΩ (2 x 32kΩ) and its voltage gain is typically 52 dB (when R7
= 68k?; see Fig.6).
Dynamic, magnetic, piezo-electric or electret (with built-in FET
source followers) can be used.
The gain of the microphone amplifier can be adjusted between 44 dB
and 52 dB to suit the sensitivity of the transducer in use. The gain is
proportional to the value of R7 which is connected between GAS1
and GAS2.
Stability is ensured by two external capacitors, C6 connected
between GAS1 and SLPE and C8 connected between GAS1 and
VEE. The value of C6 is 100pF but this may be increased to obtain a
first-order low-pass filter. The value of C8 is 10 times the value of
C6. The cut-off frequency corresponds to the time constant R7 x C6.
Input MUTE (KKA1062A)
When MUTE is LOW or open-circuit, the DTMF input is enable and
the microphone and receiving amplifier inputs are inhibited. The
reverse is true when MUTE is HIGH.
MUTE switching causes only negligible clicking on the line and
earpiece output. If the number of parallel sets in use causes a drop in
line current to below 6 mA the DTMF amplifier becomes active
independent to the DC level applied to the MUTE input.
Dual-tone multi-frequency input DTMF
When the DTMF input is enable dialing tones may be sent on to the
line. The voltage gain from DTMF to LN is typically 25.5 dB (when
R7=68kΩ) and varies with R7 in the same way as the microphone
gain. The signalling tones can be heard in the earpiece at a low level
(confidence tone).
Receiving amplifier IR, QR and GAR
The receiving amplifier has one input (IR) and a non-inverting output
(QR). The IR to QR gain is typically 31dB (when R4 = 100kΩ). It
can be adjusted between 20 and 31dB to match the sensitivity of the
transducer in use. The gain is set with the value of R4 which is
connected between GAR and QR. The overall receive gain, between
LN and QR, is calculated by subtracting the anti-sidetone network
attenuation (32dB) from the amplifier gain. Two external capacitors,
C4 and C7, ensure stability. C4 is normally 100pF and C7 is 10 times
the value of C4. The value of C4 may be increased to obtain a firstorder low-pass filter. The cut-off frequency will depend on the time
constant R4 x C4.
Under normal conditions, when ISLPE >>ICC + 0.5mA + Ip, the static
behaviour of the circuit is that of a 3.7V regulator diode with an
internal resistance equal to that of R9. In the audio frequency range
the dynamic impedance is largely determined by R1. Fig.2 show the
equivalent impedance of the circuit.
The output voltage of the receiving amplifier is specified for
continuous-wave drive. The maximum output voltage will be higher
under speech conditions where the peak to RMS ratio is higher.
Automatic gain control input AGC
KKA1062/1062A
Z bal
Automatic line loss compensation is achieved by connecting a
resistor (R6) between AGC and VEE.
Z bal + R 8
The automatic gain control varies the gain of the microphone
amplifier and the receiving amplifier in accordance with the DC line
current. The control range is 5.8 dB which corresponds to a line
length of 5 km for a
0.5mm diameter twisted-pair copper cable with a DC resistance of
176 ?/km and average attenuation of
To obtain optimum sidetone suppression, condition (2) has to be
fulfilled which results in:
R8
Zbal =
x Zline = k x Zline
R1
R8
Where k is scale factor; k =
R1
The scale factor k, dependent on the value of R8, is chosen to meet
the following criteria:
- compatibility with a standard capacitor from the E6 or
E12 range for Zbal
- |Zbal//R8|<<R8 fulfilling condition (a) and thus
ensuring correct
anti-sidetone bridge operation
- |Zbal + R8|>>R9 to avoid influencing the transmit gain.
In practise Zline varies considerably with the line type and length. The
value chosen for Zbal should therefore be for an average line thus
giving optimum setting for short or long lines.
Sidetone suppression
The anti-sidetone network, R1//Zline, R2, R3, R8, R9 and Zbal
suppresses the transmitted signal in the earpiece. Maximum
compensation is obtained when the following conditions are fulfilled:
⎛ R 8 x Zbal ⎞
⎜
⎟
⎝ R 8 + Zbal ⎠
(2)
Z line + R 1
If fixed values are chosen for R1, R2, R3 and R9, then condition (1)
will always be fulfilled when
1.2dB/km. Resistor R6 should be chosen in accordance with the
exchange supply voltage and its feeding bridge resistance. The ratio
of start and stop currents of the AGC curve is independent of the
value of R6. If no automatic
line-loss compensation is required the AGC pin may be left opencircuit. The amplifiers, in this condition, will give their maximum
specified gain.
R9 x R2 = R1 x R 3 +
Z line
=
(1)
ABSOLUTE MAXIMUM RATING
Characteristic
Symbol
Positive Continuous Line Voltage
Repetitive Line Voltage During Switch-on
or Line Interruption
Repetitive Peak Line Voltage for a 1ms
Pulse per 5s
Line Current
Input Voltage on all other Pins
Total Power
Standard DIP
Dissipation
DIP with heatsink
Operating Ambient Temperature
Storage Temperature
Junction Temperature
Test Condition
Min
Typ
Max
Unit
12
13.2
V
V
28
V
140
VCC+0.7
0.58
0.67
+75
+125
+125
mA
V
W
VLN
VLN(R)
R9 = 20Ω; R10 = 13Ω;
see Fig.6
R9 = 20Ω; note 1
VLN(RM)
Iline
VI
Ptot
-0.7
R9 = 20Ω; note 2
TA
Tstg
Tj
-25
-40
o
C
C
o
C
o
Notes
1. Mostly dependent on the maximum required TA and on the voltage between LN and SLPE.
2. Calculated for the maximum ambient temperature specified and a maximum junction temperature of 125oC.
(Thermal Resistance RJA = 85oC/W for standard DIP and RJA = 75oC/W for special DIP with heatsink).
150
150
I LN (mA)
I LN (mA)
130
130
110
110
(1)
(1)
(2)
90
90
(2)
(3)
(1) TA = 45oC; Ptot = 0.94 W
(2) TA = 55oC; Ptot = 0.82 W
(3) TA = 65oC; Ptot = 0.71 W
(4) TA = 75oC; Ptot = 0.58 W
70
(3)
(4)
50
30
2
4
Fig.3a Safe operating area
(Standard DIP)
6
o
(1) TA = 45 C; Ptot = 1.07 W
(2) TA = 55oC; Ptot = 0.93 W
(3) TA = 65oC; Ptot = 0.80 W
(4) TA = 75oC; Ptot = 0.67 W
70
(4)
50
30
2
8
10
12
V LN - V SLPE (V)
Fig.3b Safe operating area
(DIP with HS)
4
6
8
10
12
VLN - VSLPE (V)
KKA1062/1062A
ELECTRICAL CHARACTERISTICS
Iline = 11mA to mA; VEE = 0V; f = 800Hz; TA = 25oC; unless otherwise specified.
Characteristic
Symbol
Test Condition
VLN
MIC inputs open-circuit
Iline = 1mA
Iline = 4mA
Iline = 15mA
Iline = 100mA
Iline = 140mA
Iline = 15mA
Iline = 15mA
RVA(LN to REG) = 68k Ω
RVA(REG to SLPE) = 39kΩ
VCC = 2.8V
Iline = 15mA;
Ip = 1.2mA
Ip = 0mA
Voltage Drop over Circuit between LN and VEE
Variation with Temperature
Voltage Drop over Circuit Between LN and VEE
with External Resistor RVA
|VLN/T
VLN
Supply Current
Supply Voltage available for Peripheral Circuitry
ICC
VCC
Min
Typ
3.55
4.9
1.6
1.9
4.0
5.7
Max
V
4.25
6.5
7.5
mV/oC
V
-0.3
3.5
4.5
0.9
2.2
Unit
1.35
mA
V
2.7
3.4
Microphone inputs MIC- and MIC+ (pins 6 and 7)
Input Impedance
Differential
Single-ended
Common mode rejection ratio
Voltage Gain MIC+ or MIC- to LN
Gain Variation with Frequency referenced to
800Hz
Gain Variation with Temperature referenced to
25 oC
|Zi |
between MIC- and MIC+
MIC- or MIC+ to VEE
CMRR
Gv
∆Gvf
∆GvT
Iline = 15mA; R7 = 68k Ω
f = 300 and 3400 Hz
50.5
without R6; Iline = 50mA;
TA = -25 and +75 oC
64
32
82
52.0
0.2
53.5
0.2
kΩ
kΩ
dB
dB
dB
dB
DTMF Input (Pin 11)
Input Impedance
Voltage Gain from DTMF to LN
Gain Variation with Frequency referenced to
800Hz
Gain Variation with Temperature referenced to
25 oC
|Zi |
Gv
∆Gvf
∆GvT
Iline = 15mA; R7 = 68kΩ
f = 300 and 3400 Hz
24.3
Iline = 50mA;
TA = -25 and +75 oC
20.7
25.5
0.2
27.0
0.2
kΩ
dB
dB
dB
Gain adjustment inputs GAS1 and GAS2 (Pins2 and 3)
Transmitting Amplifier Gain variation by
adjustment of R7 between GAS1 and GAS2
∆Gv
-8
0
dB
Sending amplifier output LN (Pin1)
Output Voltage (RMS value)
VLN(rms)
THD = 10 %
Iline = 4mA
Iline = 15mA
1.7
0.8
2.3
V
V
21
kΩ
Receiving amplifier input IR (Pin 10)
Input Impedance
|Zi |
Iline = 15mA; RL = 300Ω;
(from pin 9 to
Receiving amplifier output QR (Pin 4)
Output Impedance
|Zo |
Voltage Gain from IR to QR
Gv
Iline = 15mA; RL = 300Ω;
(from pin 9 to pin 4)
Gain Variation with Frequency referenced to
800Hz
∆Gvf
f = 300 and 3400 Hz
0.2
dB
Gain Variation with Temperature referenced to
25oC
∆GvT
without R6; Iline = 50mA;
TA = -25 and +75oC
0.2
dB
Vo(rms)
THD = 2%; sine wave drive:
Output Voltage (RMS value)
Ω
4
29.5
31
32.5
dB
KKA1062/1062A
R4 = 100 KΩ;
Iline = 15 mA; Ip = 0 mA
RL = 150 Ω
RL = 450 Ω
Output Voltage (RMS value)
Vo(rms)
0.22
0.3
Iline = 15mA; RL = 300Ω;
(from pin 9 to pin 4)
V
V
mV
0.33
0.48
15
Gain adjustment input GAR (Pin 5)
∆Gv
Iline = 15mA; RL = 300Ω;
(from pin 9 to pin 4)
-11
0
HIGH Level Input Voltage
VIH
Iline = 15mA
1.5
VCC
V
LOW Level Input Voltage
VIIL
Iline = 15mA
-
0.3
V
Input Current
IMUTE
15
uA
Receiving Amplifier Gain Variation by
adjustment of R4 between GAR and QR
dB
Mute input (Pin 12)
8
Reduction of Gain
MIC+ or MIC- to LN
TEA1062
TEA1062A
Voltage Gain from DTMF to QR
TEA1062
TEA1062A
∆Gv
Gv
dB
MUTE = HIGH
MUTE = LOW
R4 = 100kΩ; RL = 300Ω
MUTE = HIGH
MUTE = LOW
70
70
-17
-17
R6 = 110kΩ
(between AGC and VEE)
Iline = 70mA
5.8
dB
Automatic Gain Control Input AGC (Pin 15)
Controlling the Gain from IR to QR and the
Gain from MIC+, MIC- to LN
Gain Control Range
∆Gv
Highest Line Current for Maximum Gain
IlineH
Iline = 15mA
Lowest Line Current for Minimum Gain
IlineL
Iline = 70mA
20
dB
23
61
mA
65
mA
The supply possibilities can be increased by setting the voltage drop over the circuit VLN to a higher value be resistor RVA connected between REG and
SLPE.
VCC > 2.2V; Iline = 15mA at VLN = 4V; R1 = 620Ω; R9 = 20Ω
(1) Ip = 2.1mA. Curve (1) is valid when the receiving or when MUTE = HIGH(KKA1062), MUTE = LOW(KKA1062A).
(2) Ip = 1.7mA. Curve (2) is valid when MUTE = LOW(KKA1062), MUTE = HIGH(KKA1062A) and the receiving amplifier is
driven; Vo(rms) = 150mV, RL = 150Ω.
Fig.4 Typical current Ip available from VCC for peripheral circuitry.
KKA1062/1062A
Fig. 5 Variation of gain as a function of the line current with R6 as a parameter
TABLE 1
Values of resistor R6 for optimum line-loss compensation at various values of exchange supply voltage (Vexch) and exchange bridge resistance (Rexch );
R9 = 20>.
Vexch (V)
400 Rexch (Ω)
600 Rexch (Ω)
800 Rexch (Ω)
1000 Rexch (Ω)
R6 (kΩ)
36
100
78.7
-
-
48
140
110
93.1
82
60
-
-
120
102
PINNING
Pin
Symbol
1
LN
2
GAS1
3
GAS2
4
QR
Description
Positive Line Terminal
Gain Adjustment; Transmitting Amplifier
Gain Adjustment; Transmitting Amplifier
Non-inverting Output; Receiving Amplifier
5
GAR
Gain Adjustment; Receiving Amplifier
6
MIC-
Inverting Microphone Input
7
MIC+
Non-inverting Microphone Input
8
STAB
Current Stabilizer
9
VEE
Negative Line Terminal
10
IR
Receiving Amplifier Input
11
DTMF
Dual-tone Multi-Frequency Input
12
MUTE
Mute Input (see note 1)
13
VCC
Positive Supply Decoupling
14
REG
Voltage Regulator Decoupling
15
AGC
Automatic Gain Control Input
16
SLPE
Slope (DC resistance) Adjustment
Note 1. Pin 12 is active HIGH (MUTE) for KKA1062
BZX79
C12
Zbal
R3
3.92kΩ
C2
R2
130kΩ
R8
390Ω
R4
C7
1 nF
100pF
C4
100 nF
C5
R9
20Ω
6
7
5
4
10
C8
1 nF
2
16
100 pF
GAS1
C6
LN
SLPE
MIC-
MIC+
GAR
QR
IR
1
RVA (R16-14)
R7
3
GAS2
+
Fig. 6 Typical application of KKA1062A, with piezo-electric earpiece and DTMF dialling
different protection arrangement is required for pulse dialling or register recall.
KKA1062
) Pin 12 is active HIGH (MUTE) for BT10.
he DC line voltage can be set to a higher value by the resistor RVA (REG to SLPE).
C3
4.7
µF
14
REG
BT1062A
620Ω
KKA1062A
he diode bridge, the Zener and R10 limit the current into, and the voltage across, the circuit during line transients.
elephone
ne
BZW14
(2x)
BAS11
(2x)
R10
13Ω
R1
R6
15
AGC
R5
3.6
kΩ
8
STAB
VCC
13
(1)
9
VEE
MUTE
DTMF
12
11
+
C1
100
µF
-
from dial
and
control circuits
+
KKA1062/1062A
APPLICATION INFORMATION
KKA1062/1062A
N SUFFIX PLASTIC DIP
(MS - 001BB)
A
Dimension, mm
9
16
Symbol
MIN
MAX
A
18.67
19.69
B
6.1
7.11
B
1
8
5.33
C
F
L
C
D
0.36
0.56
F
1.14
1.78
G
2.54
H
7.62
-T- SEATING
PLANE
N
G
K
M
H
D
J
0.25 (0.010) M T
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38
D SUFFIX SOIC
(MS - 012AC)
Dimension, mm
A
16
9
H
B
1
G
P
8
R x 45
C
-TK
D
SEATING
PLANE
J
0.25 (0.010) M T C M
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B ‑ 0.25 mm (0.010) per side.
F
M
Symbol
MIN
MAX
A
9.8
10
B
3.8
4
C
1.35
1.75
D
0.33
0.51
F
0.4
1.27
G
1.27
H
5.72
J
0°
8°
K
0.1
0.25
M
0.19
0.25
P
5.8
6.2
R
0.25
0.5