MAX97000EWA+T Maxim Integrated Products, MAX97000EWA+T Datasheet - Page 20

• Manufacturer Part Number: MAX97000EWA+T
• Description: IC AUDIO SUBSYSTEM 25WLP
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class Dr

Specifications of MAX97000EWA+T

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 930mW x 1 @ 8 Ohm; 40mW x 2 @ 16 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Differential Inputs, I²C, Mute, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 25-WLP
• Product: Class-D
• Output Power: 725 mW
• Available Set Gain: 12 dB
• Common Mode Rejection Ratio (min): 32 dB to 55 dB
• Thd Plus Noise: 0.05 %
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 0.4 mA to 1.45 mA
• Maximum Power Dissipation: 850 mW
• Maximum Operating Temperature: + 80 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 41.2 KOhms
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX97000EWA+T

Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
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Traditional Class D amplifiers require the use of external
LC filters or shielding to meet EN55022B electromag-
netic-interference (EMI) regulation standards. Maxim’s
active emissions limiting edge-rate control circuitry and
spread-spectrum modulation reduces EMI emissions,
while maintaining up to 87% efficiency. Maxim’s spread-
spectrum modulation mode flattens wideband spectral
Figure 4. EMI with 15cm of Speaker Cable
Ultra-Low EMI Filterless Output Stage
-10
-10
40
30
20
10
40
30
20
10
0
0
300
30
350
60
400
80
450
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500
120
550
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FREQUENCY (MHz)
FREQUENCY (MHz)
600
160
650
components, while proprietary techniques ensure that
the cycle-to-cycle variation of the switching period
does not degrade audio reproduction or efficiency.
The MAX97000’s spread-spectrum modulator randomly
varies the switching frequency by Q20kHz around the
center frequency (250kHz). Above 10MHz, the wide-
band spectrum looks like noise for EMI purposes (see
Figure 4).
180
700
200
750
220
800
240
850
260
900
280
950
1000
300