SA575 Datasheet, PDF (3/14 Pages) NXP Semiconductors – Low voltage compandor

Philips Semiconductors
Low voltage compandor
Product specification
SA575
BLOCK DIAGRAM and TEST CIRCUIT
V_CC +5V
0.1µF
V_REF
V_OUT
C3
+
10µF
+ _CRECT
2.2µF
GND
V_IN
C6
10µF ⁺
+
10µF
GND
GND
1+
575
20
V_CC
2_–
OP AMP
+ ₁₉
3
– 18
OP AMP
C15
R13
10k
10µF
+
C14
GND
V_IN
V_REF
4
3.8k
5
Σ
6
7
10k
17
16
3.8k
C11
+
4.7µF
C_RECT
15 ₊
2.2µF
Σ
14
C10
+
10µF
V_OUT
8
V_REF
9
∆G
10k
10
GND
13
10k
12
∆G
11
10k
Figure 2. Block Diagram and Test Circuit
R8
30k
R7
30k
+
C8
1µF
GND
SR00704
DC ELECTRICAL CHARACTERISTICS
Typical values are at T_A = 25°C. Minimum and Maximum values are for the full operating temperature range: -40 to +85°C for SA575, except
SSOP package is tested at +25°C only. V_CC = 5V, unless otherwise stated. Both channels are tested in the Expandor mode (see Test Circuit)
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
SA575
UNITS
MIN
TYP
MAX
For compandor, including summing amplifier
V_CC
Supply voltage¹
I_CC
V_REF
Supply current
Reference voltage²
R_L
Summing amp output load
THD
Total harmonic distortion
No signal
V_CC = 5V
1kHz, 0dB BW = 3.5kHz
3
5
7
V
3
4.2
5.5
mA
2.4
2.5
2.6
V
10
kΩ
0.12
1.5
%
E_NO
Output voltage noise
0dB
Unity gain level
BW = 20kHz, R_S = 0Ω
1kHz
6
30
µV
-1.5
1.5
dB
V_OS
Output voltage offset
Output DC shift
No signal
No signal to 0dB
-150
-100
150
mV
100
mV
Gain cell input = 0dB, 1kHz
Rectifier input = 6dB, 1kHz
-1.0
1.0
dB
Tracking error relative to 0dB
Gain cell input = 0dB, 1kHz
Rectifier input = -30dB, 1kHz
-1.0
1.0
dB
1997 Nov 07
3