MAX97000EWA+T Maxim Integrated Products, MAX97000EWA+T Datasheet - Page 20
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MAX97000EWA+T
Manufacturer Part Number
MAX97000EWA+T
Description
IC AUDIO SUBSYSTEM 25WLP
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class Dr
Datasheet
1.MAX97000EWAT.pdf
(34 pages)
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
20
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
100
500
120
550
140
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