Electrical characteristics (continued) – Rainbow Electronics MAX9758 User Manual
Page 4
MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= HPV
DD
= CPV
DD
= IN = +5.0V, GND = PGND = CPGND = 0,
SHDN = V
DD
, REGEN = V
DD
, DR = SET = GND, C
BIAS
= 1µF, C
PVSS
= 1µF, C1 = C2 = 1µF, PREF = unconnected, speaker loads terminated between OUT_+ and OUT_-, headphone load
terminated between HP_ and GND, GAIN1 = GAIN2 = GAIN3 = VOL = 0 (A
V(SP)
= 15dB, A
V(HP)
= 0dB), T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CHARGE PUMP
Charge-Pump Frequency
f
OSC
500
550
600
kHz
VOLUME CONTROL
VOL Input Impedance
R
VOL
100
M
Ω
VOL Input Hysteresis
10
mV
Full Mute Voltage
(Note 7)
0.858 x
HPV
DD
V
Full Mute Attenuation
f
IN
= 1kHz
-85
dB
Input Impedance
R
VOL_
Any gain setting
100
M
Ω
A
V
= +15dB to 0dB
±0.2
A
V
= -2dB to -20dB
±0.3
Channel Matching
A
V
= -22dB to -56dB
±1.0
dB
BEEP INPUT
Beep Signal Amplitude Threshold
T
A
= +25°C, R
B
= 47k
Ω (see BEEP Input
section)
0.3
V
Beep Signal Frequency
Threshold
T
A
= +25°C
300
Hz
AUTOMATIC LEVEL CONTROL SPEAKER AMPLIFIER (MAX9756/MAX9757)
PREF Threshold Accuracy
R
PREF
= 180k
Ω
5
8.1
%
Maximum Gain Compression
6.0
6.3
dB
Attack Time
C
T
= 1µF (Note 8)
15
ms
Hold Time
Time between attack and release phases
50
ms
0V < V
DR
< (0.3V x V
DD
)
30
0.4V < V
DR
< (0.6V x V
DD
)
9.5
Release Time (Note 9)
C
T
= 1µF,
release from
6dB
0.8V < V
DR
< V
DD
3
s
DR INPUT (TRI-STATE INPUT)
DR Input Voltage High
V
DRH
0.8 x
V
DD
V
DD
V
DR Input Voltage Middle
V
DRM
0.4 x
V
DD
0.6 x
V
DD
V
DR Input Voltage Low
V
DRL
0
0.3 x
V
DD
V
Input Leakage Current
0V
≤ V
DR
≤ V
DD
±1
µA
LOGIC INPUTS (GAIN_,
SHDN, REGEN)
Input High Voltage
V
IH
2
V
Input Low Voltage
V
IL
0.8
V
Input Leakage Current
I
IN
±1
µA