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RF COMMUNICATIONS PRODUCTS
SA577
Unity gain level programmable power compandor
Product specification
1997 Nov 07
Replaces data of December 15, 1993 IC17 Data Handbook
Philips Semiconductors
Philips Semiconductors |
Product specification |
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Unity gain level programmable low power compandor |
SA577 |
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DESCRIPTION
The SA577 is a unity gain level programmable compandor designed for low power applications. The SA577 is internally configured as an expandor and a compressor to minimize external component count.
FEATURES
•Operating voltage range: 1.8V to 7V
•Low power consumption (1.4mA @ 3.6V)
•0dB level programmable (10mVRMS to 1.0VRMS)
•Over 90dB of dynamic range
•Wide input/output swing capability (rail-to-rail)
•Low external component count
•SA577 meets cellular radio specifications
•ESD hardened
PIN CONFIGURATION
D Package
GCELLIN |
1 |
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14 |
VCC |
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RECTIN |
2 |
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13 |
COMPCAP2 |
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EXPCAP |
3 |
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12 |
COMPIN |
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EXPOUT |
4 |
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11 |
COMPCAP1 |
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VREF |
5 |
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10 |
RECTIN |
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I |
6 |
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9 |
GCELLIN |
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REF |
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GND |
7 |
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8 |
COMPOUT |
SR00716
Figure 1. Pin Configuration
APPLICATIONS
•High performance portable communications
•Cellular radio
•Cordless telephone
•Consumer audio
•Wireless microphones
•Modems
•Electric organs
•Hearing aids
•Automatic level control (ALC)
ORDERING INFORMATION
DESCRIPTION |
TEMPERATURE RANGE |
ORDER CODE |
DWG # |
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14-Pin Plastic Small Outline (SO) |
±40 to +85°C |
SA577D |
SOT108-1 |
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ABSOLUTE MAXIMUM RATINGS
SYMBOL |
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PARAMETER |
RATING |
UNITS |
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SA577 |
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VCC |
Supply voltage |
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8 |
V |
T |
Operating ambient temperature range |
±40 to +85 |
° |
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A |
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C |
T |
Storage temperature range |
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±65 to +150 |
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STG |
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C |
θ |
Thermal impedance |
SO |
125 |
° |
JA |
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C/W |
1997 Nov 07 |
2 |
853-1535 18666 |
Philips Semiconductors |
Product specification |
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Unity gain level programmable low power compandor |
SA577 |
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ELECTRICAL CHARACTERISTICS
TA = 25°C, VCC = 3.6VDC, compandor 0dB level = ±20dBV = 100mVRMS, output load RL = 10kΩ, Freq = 1kHz, unless otherwise specified.
R1, R2 and R3 are 1% resistors.
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LIMITS |
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SYMBOL |
PARAMETER |
TEST CONDITIONS |
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SA577 |
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UNITS |
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MIN |
TYP |
MAX |
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VCC |
Supply voltage1 |
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2 |
3.6 |
7 |
V |
ICC |
Supply current |
No signal |
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1.4 |
2 |
mA |
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R2 = 100kΩ |
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V |
Reference voltage2 |
V |
CC |
= 3.6V |
1.7 |
1.8 |
1.9 |
V |
REF |
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RL |
Summing amp output load |
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10 |
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kΩ |
THD |
Total harmonic distortion |
1kHz, 0dB, BW = 3.5kHz |
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0.25 |
1.5 |
% |
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ENO |
Expandor output noise voltage |
BW = 20kHz, RS = 0Ω |
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10 |
25 |
μV |
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0dB |
Unity gain level |
0dB at 1kHz |
±1.5 |
0.18 |
1.5 |
dB |
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Programmable range3 |
R1 = R3 = 18.7kΩ, R2 = 24.3kΩ |
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0 |
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R1 = R3 = 22.6kΩ, R2 = 100kΩ |
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±10 |
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dBV |
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R1 = R3 = 7.15kΩ, R2 = 100kΩ |
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±20 |
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R1 = R3 = 1.33kΩ, R2 = 200kΩ |
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±40 |
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VOS |
Output voltage offset |
No signal |
±150 |
1 |
150 |
mV |
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Expandor output DC shift |
No signal to 0dB |
±100 |
7 |
100 |
mV |
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Tracking error relative to 0dB output |
-20dB expandor |
±1.0 |
0.3 |
1.0 |
dB |
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Crosstalk, COMP to EXP |
1kHz, 0dB, CREF = 10μF |
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±80 |
±65 |
dB |
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VO |
Output swing low |
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0.2 |
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V |
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Output swing high |
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VCC ± 0.2 |
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NOTE:
1.Operation down to VCC = 1.8V is possible, see application note AN1762.
2.Reference voltage, VREF, is typically at 1/2 VCC.
3.Unity gain level can be adjusted CONTINUOUSLY between ±40dBV = 10mVRMS and 0dBV = 1.0VRMS. For details see application note AN1762.
1997 Nov 07 |
3 |
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