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SL1062A Schematic ( PDF Datasheet ) - System Logic Semiconductor

Teilenummer SL1062A
Beschreibung Low Voltage Transmission Circuit with Dialler Interface
Hersteller System Logic Semiconductor
Logo System Logic Semiconductor Logo 




Gesamt 9 Seiten
SL1062A Datasheet, Funktion
SL1062A
Low Voltage Transmission Circuit
with Dialler Interface
The SL1062A is an integrated circuit that perform all speech and line
interface functions required in fully electronic telephone sets. They
perform electronic switching between dialling and speech. The ICs
operate at line voltage down to 1.6 V DC (with reduced performance)
to facilitate the use of more telephone sets connected in parallel.
Low DC line voltage: operates down to 1.6 V (excluding polarity
guard)
Voltage regulator with adjustable static resistance
Provides a supply for external circuits
Symmertical high-impedance inputs (64 K) for dynamic,
magnetic or piezo-electric microphones
Asymmetrical high-impedance input (32 K) for electret
microphones
DTMF signal input with confidence tone
Mute input for pulse or DTMF dialing:
active LOW (MUTE)
Receiving amplifier for dynamic, magnetic or piezo-electric
earpieces
Large gain setting ranges 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
ORDERING INFORMATION
SL1062AN Plastic
TA = -25° to 75° C
for package
PIN ASSIGNMENT
BLOCK DIAGRAM
SLS
System Logic
Semiconductor






SL1062A Datasheet, Funktion
SL1062A
ELECTRICAL CHARACTERISTICS(Iline = 11 to 140 mA; VEE = 0 V; f = 800 Hz;Tamb = 25°C; unless
other specified)
Symbol
Parameter
Test Conditions
Guaranteed Limits
Unit
Min Typ Max
Microphone inputs MIC- and MIC+ (pins 6 and 7)
Zi
Input Impedance
differential
single -ended
between MIC- and MIC+
MIC- or MIC+ to VEE
K
- 64 -
- 32 -
CMRR Common Mode Rejection
Ratio
- 82 - dB
Gv Voltage Gain MIC+ or MIC- Iline = 15 mA
to LN
R7 = 68 K
50.5 53.5 dB
Gvf Gain Variation with
f = 300 and 3400 Hz
Frequency Reference to 800
Hz
- ±0.2 -
dB
GvT
Gain Variation with
Temperature Referenced to
25°C
without R6; Iline =50 mA;
Tamb = -25 and +75°C
- ±0.2 -
dB
DTMF input (pin 11)
ZiInput Impedance
Gv Voltage Gain from DTMF to
LN
Iline 15 mA; R7 = 68 K
- 20.7 - K
24.0 - 27.0 dB
Gvf Gain Variation with
Frequency Reference to
800 Hz
f = 300 and 3400 Hz
- ±0.2 -
dB
GvT
Gain Variation with
Temperature Referenced to
25°C
Iline =50 mA;
Tamb = -25 and +75°C
- ±0.2 -
dB
Gain Adjustment Inputs GAS1 and GAS2 (pins 2 and 3)
Gv Transmitting Amplifier Gain
Variation by Adjustment of
R7 between GAS1 and GAS2
-8 - 0 dB
Sending Amplifier Output LN (pin 1)
VLN(rms)
Vno(rms)
Output Voltage (RMS value)
Noise Output Voltage (RMS
value)
THD = 10%
Iline = 4 mA
Iline = 15 mA
Iline = 15 mA; R7 =68K
200 between MIC- and
MIC+
- 0.8
1.7 -
- -69
V
-
-
- dBmp
Receiving Amplifier Input IR (pin 10)
ZiInput Impedance
Receiving amplifier output QR (pin 4)
ZoOutput Impedance
Gv Voltage Gain from IR to QR
Iline 15 mA; RL = 300
(from pin 9 to pin 4)
- 21 - K
- 4-
29.5 - 32.5 dB
(continued)
SLS
System Logic
Semiconductor

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