MAX9730 Просмотр технического описания (PDF) - Maxim Integrated
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MAX9730 Datasheet PDF : 15 Pages
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2.4W, Single-Supply, Class G Power Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VCC = CPVDD = SHDN = 3.6V, GND = CPGND = 0V, RIN+ = RIN- = 10kΩ, RFB+ = RFB- = 10kΩ, RFS = 100kΩ, C1 = 4.7µF, C2 =
10µF; speaker load resistors (RL) are terminated between OUT+ and OUT-, unless otherwise stated; TA = TMIN to TMAX, unless other-
wise noted. Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Voltage Gain
Continuous Output Power
Output Voltage
AV
POUT
VOUT
(Notes 4, 7)
THD+N = 1%, f = 1kHz,
RL = 8Ω
f = 1kHz, 1% THD+N,
ZL = 1µF + 10Ω
f = 10kHz, 1% THD+N,
ZL = 1µF + 10Ω, no
load
VCC = 5V
VCC = 4.2V
VCC = 3.6V
VCC = 3.0V
VCC = 5V
VCC = 4.2V
VCC = 3.6V
VCC = 3.0V
VCC = 5V
VCC = 4.2V
VCC = 3.6V
VCC = 3.0V
11.5
12
2.4
1.67
1.25
0.8
12.5
dB
VRMS
7.1
5.9
5.1
4.2
6.5
W
5.4
4.7
3.8
VCC = 2.7V to 5.5V
63
77
Power-Supply Rejection Ratio
(Note 4)
PSRR
f = 217Hz, 200mVP-P ripple
f = 1kHz, 200mVP-P ripple
77
dB
77
Total Harmonic Distortion Plus
Noise
THD+N
f = 20kHz, 200mVP-P ripple
RL = 8Ω, VOUT = 1kHz / 400mW
RL = 8Ω, VOUT = 1kHz / 1W
58
0.007
%
0.12
Signal-to-Noise Ratio
SNR
VOUT = 0.5W, inputs to GND by C1N,
A-weighted
95
dB
Dynamic Range
DR
(Note 9)
22Hz to 22kHz
A-weighted
96
dB
99
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Testing performed with resistive and inductive loads to simulate an actual speaker load. For dynamic speakers,
RL = 8Ω, 68µH.
Designed for 1.8V logic.
RIN_ and RFB_ have 0.5% tolerance.
Amplifier inputs AC-coupled to GND.
Testing performed at room temperature with 8Ω resistive load in series with 68µH inductive load connected across BTL
output for speaker amplifier. Mode transitions are controlled by SHDN. VCP is the peak output transient expressed in dBV.
Voltage gain is defined as: [VOUT+ - VOUT-] / [VIN+ - VIN-].
Mode A tone burst tested at full amplitude for one cycle and half amplitude for nine cycles. Mode B tone burst tested at
full amplitude for three cycles and half amplitude for seven cycles. Full amplitude is defined as 1% THD+N at full battery
(VCC = 4.2V). Electrical Characteristics table targets must be met at THD+N = 1% for one cycle (Mode A) and THD+N <
5% for three cycles (Mode B).
Dynamic range is calculated by measuring the RMS voltage difference between a -60dBFS output signal and the noise
floor, then adding 60dB. Full scale is defined as the output signal needed to achieve 1% THD+N.
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