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