Rainbow Electronics MAX9768 - Manual (Page 4)

MAX9768
10W Mono Class D Speaker
Amplifier with Volume Control
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(PV DD = 12V, V DD = 3.3V, GND = PGND = 0V, V SHDN = V DD , V MUTE = 0V; Max volume setting; speaker load resistor connected
between OUT+ and OUT-, R L = ∞, unless otherwise noted. C
BIAS = 2.2µF, C1 = C2 = 0.1µF, C IN = 0.47µF, R IN = 20k Ω, R
F = 30kΩ,
SSM mode. Filterless modulation mode (see the Functional Diagram/Typical Application Circuit). T A = T MIN to T MAX , unless otherwise
noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SYNC = GND 265 300 330
SYNC = unconnected 324 360 396 Class D Switching
Frequency
SYNC = V DD (spread-spectrum modulation
mode)
300
±7.5
kHz
SYNC Frequency Lock
Range
1000 1600 kHz
Minimum SYNC Frequency
Lock Duty Cycle
40 %
Maximum SYNC Frequency
Lock Duty Cycle
60 %
Gain Matching Full volume (ideal matching for R IN and R F ) 2 %
Into shutdown 52.6
Out of shutdown 48
Into mute 67
Click-and-Pop Level (Note 2) K
CP
Peak voltage, 32 samples
per second, A-weighted, R
IN
x C IN
≤ 10ms to guarantee
clickless/popless operation
Out of mute 57
dBV
Input Impedance DC volume control mode (SDA/VOL) 100 M Ω
Input Hysteresis DC volume control mode (SDA/VOL) 11 mV
9.5dB Gain Voltage DC volume control mode (SDA/VOL) 0.1 x V DD V
Full Mute Voltage DC volume control mode (SDA/VOL) 0.9 x V DD V
DIGITAL INPUTS ( SHDN, MUTE, ADDR1, ADDR2, SYNC)
SYNC 2.33
Input-Voltage High V IH
All other pins 0.7 x V DD
V
SYNC 0.8
Input-Voltage Low V IL
All other pins 0.3 x V DD
V
I SYNC ±7.5 ±13
Input Leakage Current
I LK All other digital inputs ±1
µA
DIGITAL OUTPUT (SYNCOUT)
Output-Voltage High Load = 1mA V DD - 0.3 V
Output-Voltage Low Load = 1mA 0.3 V
Rise/Fall Time C L = 10pF 5 ns