SA577 Datasheet, PDF (3/7 Pages) NXP Semiconductors – Unity gain level programmable power compandor

Philips Semiconductors
Unity gain level programmable low power compandor
Product specification
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
SA577
UNITS
V_CC
I_CC
V_REF
R_L
THD
E_NO
0dB
Supply voltage¹
Supply current
Reference voltage²
Summing amp output load
Total harmonic distortion
Expandor output noise voltage
Unity gain level
Programmable range³
V_OS Output voltage offset
Expandor output DC shift
No signal
R₂ = 100kΩ
V_CC = 3.6V
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
No signal
No signal to 0dB
MIN
2
1.7
10
–1.5
–150
–100
TYP
MAX
3.6
7
V
1.4
2
mA
1.8
1.9
V
kΩ
0.25
1.5
%
10
25
µV
0.18
1.5
dB
0
–10
dBV
–20
–40
1
150
mV
7
100
mV
Tracking error relative to 0dB output
Crosstalk, COMP to EXP
Output swing low
V_O
Output swing high
-20dB expandor
1kHz, 0dB, C_REF = 10µF
–1.0
0.3
1.0
dB
–80
–65
dB
0.2
V
V_CC – 0.2
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.
1997 Nov 07
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