CS42L51-CNZR Cirrus Logic Inc, CS42L51-CNZR Datasheet - Page 30

• Manufacturer Part Number: CS42L51-CNZR
• Description: IC LV Stereo Codec F/Digital Audio Apps
• Manufacturer: Cirrus Logic Inc
• Type: Stereo Audior

Specifications of CS42L51-CNZR

• Data Interface: PCM Audio Interface
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 98 / 98
• Voltage - Supply, Analog: 1.8V, 2.5V
• Voltage - Supply, Digital: 1.8V, 2.5V
• Operating Temperature: -10°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1005 - BOARD EVAL FOR CS42L51 CODEC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q3956082

30
4.3.5
The MICBIAS series resistor must be selected based on the requirements of the particular microphone
used. The MICBIAS output pin is selected using the MICBIAS_SEL bit.
Software
Controls:
Analog Input Multiplexer
A stereo 4-to-1 analog input multiplexer selects between a line-level input source, or a mic-level input
source, depending on the PDN_PGAx and AINx_MUX[1:0] bit settings. Signals may be routed to or by-
passed around the PGA. To conserve power, the PGA’s may be powered down allowing the user to select
from multiple line-level sources and route the stereo signal directly to the ADC. When using the MIC pre-
amp, however, the PGA must be powered up.
Analog input channel B may also be used as an output for the MIC bias voltage. The MICBIAS_SEL bit
routes the bias voltage to either of two pins. The multiplexer must then select from the remainder of the
two input channels.
The ADC, PGA and MIC pre-amplifier each has an associated input resistance. When selecting between
these paths, the input resistance to the CODEC will change accordingly. Refer to the input resistance
characteristics in the
Software
Controls:
“Interface Control (Address 04h)” on page
“Power Control 1 (Address 02h)” on page
Input Select, Invert & Mute (Address 07h)” on page
//
//
Characteristic and Specification Tables
Figure 10. MIC Input Mix w/Common Mode Rejection
2.15 V
0.35 V
2.15 V
0.35 V
1.25 V
1.25 V
Full-Scale Differential Input Level (MICMIX=1)
= (AINxA - AINxB) = 3.6 V
Figure 11. Differential Input
+
PP
+
= 1.27 V
MICIN1
MICIN2
RMS
17
18
49,
47,
“MIC Control (Address 05h)” on page
“MIC Control (Address 05h)” on page
Σ
for the input resistance of each path.
AINxB
AINxA
53.
MICBIAS
VA
2.5 V
20
51.
CS42L51
51,
“ADCx
DS679A2