MAX98090BEWJ+T Maxim Integrated, MAX98090BEWJ+T Datasheet - Page 77
![no-image](/images/no-image-200.jpg)
MAX98090BEWJ+T
Manufacturer Part Number
MAX98090BEWJ+T
Description
Interface - CODECs 5V 130mW Stereo Headphone Amp
Manufacturer
Maxim Integrated
Datasheet
1.MAX98090BETL.pdf
(166 pages)
- Current page: 77 of 166
- Download datasheet (13Mb)
MAX98090
Power and Performance Management
The device includes comprehensive power management
to allow the disabling of unused blocks to minimize sup-
ply current. In addition to this, the available power modes
provide a software configurable choice between highest
performance and reduced power consumption.
Device Performance Configuration
The Bias Control register (Table 3) selects the method
used to derive the common-mode reference voltage. A
common-mode bias created by resistive division (from the
Table 3. Bias Control Register
Table 4. DAC and Headphone Performance Mode Control Register
www.maximintegrated.com
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
BIAS_MODE
PERFMODE
ADDRESS: 0x42
ADDRESS: 0x43
DACHP
NAME
NAME
—
—
—
—
—
—
—
—
—
—
—
—
—
TYPE POR
TYPE POR
R/W
R/W
R/W
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
0
Select source for BIAS.
0: BIAS derived from resistive division.
1: BIAS created by bandgap reference.
Performance Mode
Selects DAC to headphone playback performance mode:
1: Low power headphone playback mode.
0: High performance headphone playback mode.
DAC High-Performance Mode
0: DAC settings optimized for lowest power consumption.
1: DAC settings optimized for best performance.
AVDD supply) facilitates lower overall power consumption
by disabling the bandgap reference circuit. However, this
type of BIAS reference has the disadvantage of scaling
with the AVDD supply voltage (and thus also has reduced
PSRR). When derived from a bandgap reference, BIAS
is constant regardless of the supply voltage, but the addi-
tional circuitry increases power consumption.
The ADC, DAC, and headphone playback all have option-
al high-performance modes (Tables 4 and 5). In each
case, these modes trade additional power consumption
for enhanced performance. The ADC also has optional
Ultra-Low Power Stereo Audio Codec
DESCRIPTION
DESCRIPTION
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Maxim Integrated │ 77
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