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Philips Semiconductors RF Communications Products
Product specification
Unity gain level programmable low power compandor
NE/SA577
DESCRIPTION
The NE/SA577 is a unity gain level
programmable compandor designed for low
power applications. The NE577 is internally
configured as an expandor and a compressor
to minimize external component count.
The NE577 is available in a 14-pin plastic
DIP and SO packages.
APPLICATIONS
•
PIN CONFIGURATION
High performance portable
communications
D and N Packages
•
Cellular radio
GCELL-
IN
RECT
IN
EXP-
CAP
EXP
OUT
V
REF
1
14
V
CC
COMP
CAP2
COMP
IN
COMP
CAP1
•
Cordless telephone
2
3
13
12
•
Consumer audio
•
Wireless microphones
4
11
FEATURES
•
•
Modems
5
10
Operating voltage range: 1.8V to 7V
RECT
IN
GCELL
IN
COMP
OUT
•
Electric organs
6
9
•
I
REF
Low power consumption
(1.4mA @ 3.6V)
•
GND
7
8
Hearing aids
•
•
0dB level programmable
(10mV
RMS
to 1.0V
RMS
)
Automatic level control (ALC)
•
Over 90dB of dynamic range
•
Wide input/output swing capability
(rail-to-rail)
•
Low external component count
•
SA577 meets cellular radio specifications
•
ESD hardened
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
ORDER CODE
DWG #
°
0 to +70
C
14-Pin Plastic Dual In-Line Package (DIP)
NE577N
0405B
°
14-Pin Plastic Small Outline (SO)
0 to +70
C
NE577D
0175D
°
14-Pin Plastic Dual In-Line Package (DIP)
–40 to +85
C
SA577N
0405B
°
–40 to +85
C
14-Pin Plastic Small Outline (SO)
SA577D
0175D
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNITS
NE577
SA577
V
CC
Supply voltage
8
8
V
°
T
A
Operating ambient temperature range
0 to +70
–40 to +85
C
°
C
T
STG
Storage temperature range
–65 to +150
–65 to +150
°
C/W
°
Thermal impedance
DIP
SO
90
125
90
125
q
JA
C/W
2
December 15, 1993
853-1535 11649
Philips Semiconductors RF Communications Products
Product specification
Unity gain level programmable low power compandor
NE/SA577
ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
CC
= 3.6VDC, compandor 0dB level = –20dBV = 100mV
RMS
, output load R
L
= 10k
, Freq = 1kHz, unless otherwise specified.
W
R1, R2 and R3 are 1% resistors.
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
NE/SA577
UNITS
MIN
TYP
MAX
Supply voltage
1
V
CC
2
3.6
7
V
No signal
R
2
= 100k
I
CC
Supply current
1.4
2
mA
W
Reference voltage
2
V
REF
V
CC
= 3.6V
1.7
1.8
1.9
V
R
L
Summing amp output load
10
k
W
THD
Total harmonic distortion
1kHz, 0dB, BW = 3.5kHz
0.25
1.5
%
E
NO
Expandor output noise voltage
BW = 20kHz, R
S
= 0
W
10
25
m
V
0dB
Unity gain level
0dB at 1kHz
–1.5
0.18
1.5
dB
Programmable range
3
R1 = R3 = 18.7k
W
, R2 = 24.3k
W
0
dBV
R1 = R3 = 22.6k
W
, R2 = 100k
W
–10
dBV
R1 = R3 = 7.15k
W
, R2 = 100k
W
–20
dBV
R1 = R3 = 1.33k
W
, R2 = 200k
W
–40
dBV
V
OS
Output voltage offset
No signal
–150
1
150
mV
Expandor output DC shift
No signal to 0dB
–100
7
100
mV
Tracking error relative to 0dB output
-20dB expandor
–1.0
0.3
1.0
dB
Crosstalk, COMP to EXP
1kHz, 0dB, C
REF
= 10
m
F
–80
–65
dB
V
O
Output swing low
0.2
V
Output swing high
V
CC
– 0.2
V
NOTE:
1.
Operation down to V
CC
= 1.8V is possible, see application note AN1762.
2.
Reference voltage, V
REF
, is typically at 1/2 V
CC
.
3.
Unity gain level can be adjusted CONTINUOUSLY between –40dBV = 10mV
RMS
and 0dBV = 1.0V
RMS
. For details see application note
AN1762.
3
December 15, 1993
Philips Semiconductors RF Communications Products
Product specification
Unity gain level programmable low power compandor
NE/SA577
BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT
10k
GAINCELL
C1
EXP
IN
10k
+
14
V
CC
1
D
G
S
10
m
F
R1*
10k
RECTIFIER
COMP
CAP2
5k
13
2
C8
+
RECT
IN
2.2
m
F
C7
30k
30k
10k
EXP
CAP
+
12
3
+
COMP
IN
2.2
m
F
C2
10
m
F
EXPANDOR
C3
COMP
CAP1
+
11
4
+
EXP
OUT
C6
S
10
m
F
2.2
m
F
RECTIFIER
10k
C4
V
REF
8.6k
+
10
5
RECT
IN
10
m
F
V
REF
R3*
10k
BANDGAP
9
GCELL
IN
6
D
G
I
REF
V
CC
COMPRESSOR
R2*
+
C5
10
m
F
GAINCELL
GND
+
8
7
COMP
OUT
C9
10
m
F
GND
*R1, R2 and R3 are 1% resistors.
4
December 15, 1993
Philips Semiconductors RF Communications Products
Product specification
Unity gain level programmable low power compandor
NE/SA577
TYPICAL PERFORMANCE CHARACTERISTICS
V
CC
= 3.6V, T
A
= 25
°
C, R1=R3=7.15k
W
, R2=100k
W
, 0dB level = 100mV, Freq. = 1kHz
SUPPLY CURRENT vs SUPPLY VOLTAGE
SUPPLY CURRENT vs TEMPERATURE
1.6
1.8
1.5
1.6
1.4
1.4
1.3
1.2
1.2
1
1.1
0.8
1
0.6
-40
-20
0
20
40
60
80
100
1
2
3
4
5
6
7
8
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (
°
C)
UNITY GAIN ERROR vs SUPPLY VOLTAGE
UNITY GAIN ERROR vs TEMPERATURE
0.6
0.6
NOTE: UNITY GAIN ERROR MAY BE
SET TO 0 AT ANY V
CC
BY
ADJUSTING THE VALUE OF R1, R3
0.4
0.4
EXPANDOR
EXPANDOR
0.2
0.2
0
0
COMPRESSOR
COMPRESSOR
-0.2
-0.2
-0.4
-0.4
-0.6
-0.6
2
3
4
5
6
7
-40
-20
0
20
40
60
80
100
SUPPLY VOLTAGE (V)
TEMPERATURE (
°
C)
TRACKING ERROR vs INPUT LEVEL
THD vs TEMPERATURE
0.5
1
NOTE: RELATIVE
TO UNITY GAIN
COMPRESSOR
0.5
0.4
EXPANDOR
0
0.3
EXPANDOR
COMPRESSOR
-0.5
0.2
-1
0.1
2
3
4
5
6
-40
-20
0
20
40
60
80
100
INPUT LEVEL (dB)
TEMPERATURE (
°
C)
5
December 15, 1993
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