WM8740SEDS/V Wolfson Microelectronics, WM8740SEDS/V Datasheet - Page 15

• Manufacturer Part Number: WM8740SEDS/V
• Description: Audio D/A Converter ICs Stereo DAC High End
• Manufacturer: Wolfson Microelectronics

Specifications of WM8740SEDS/V

• Resolution: 24 bit
• Operating Supply Voltage: 5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Number Of Dac Outputs: 4
• Number Of Dacs: 2
• Snr: 116 dB
• Supply Current: 19 mA
• Thd Plus Noise: - 104 dB
• Package / Case: SSOP-28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8740
SOFTWARE CONTROL INTERFACE
w
DE-EMPHASIS CONTROL
Table 2 De-Emphasis Control
AUDIO INPUT FORMAT
Table 3 Audio Input Format
SOFT MUTE
Table 4 Soft Mute
A logic low on the MUTEB pin will cause the attenuation to ramp to infinite attenuation at a rate of
128/fs seconds per 0.5dB step. Setting MUTEB high will cause the attenuation to ramp back to its
previous value.
The WM8740 can be controlled using a 3-wire serial interface. MD/DM0 (pin 26) is used for the
program data, MC/DM1 (pin 22) is used to clock in the program data and ML/I2S (pin 28) is use to
latch in the program data. The 3-wire interface protocol is shown in Figure 6. CSB/IWO (pin 23) must
be low when writing.
Figure 10 Three-Wire Serial Interface
MDDM1
MUTEB
ML/I2S
PIN 27
PIN 28
PIN 25
MC/DM1 (PIN 27)
MD/DM0 (PIN 26)
H
H
H
H
H
L
L
L
L
L
ML/I2S (PIN 28)
CSBIWO
MCDMO
PIN 26
PIN 23
Mute Off (normal operation)
H
H
H
H
L
L
L
L
Mute On (no output)
FUNCTION
B15 B14 B13
16 bit normal right
20 bit normal right
DATA FORMAT
DE-EMPHASIS
16 bit I
24 bit I
44.1kHz
justified
justified
48kHz
32kHz
Off
2
2
S
S
B2
PD, Rev 4.4, April 2010
B1
Production Data
B0
15