AD1938YSTZ Analog Devices Inc, AD1938YSTZ Datasheet - Page 24

• Manufacturer Part Number: AD1938YSTZ
• Description: IC CODEC 24BIT 4ADC/8DAC 48LQFP
• Manufacturer: Analog Devices Inc
• Type: General Purposer

Specifications of AD1938YSTZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 4 / 8
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 94 / 94
• Dynamic Range, Adcs / Dacs (db) Typ: 105 / 106
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Audio Codec Type: Audio
• No. Of Adcs: 4
• No. Of Dacs: 8
• No. Of Input Channels: 4
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Adcs / Dacs Signal To Noise Ratio: 108dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD1938
CONTROL REGISTERS
DEFINITIONS
The global address for the AD1938 is 0x04, shifted left one bit due to the R/ W bit. All registers are reset to 0, except for the DAC volume
registers that are set to full volume.
Note that the first setting in each control register parameter is the default setting.
Table 14. Register Format
Bit
Table 15. Register Addresses and Functions
Address
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PLL AND CLOCK CONTROL REGISTERS
Table 16. PLL and Clock Control Register 0
Bit
0
2:1
4:3
6:5
7
Global Address
23:17
Value
0
1
00
01
10
11
00
01
10
11
00
01
10
11
0
1
Function
PLL and Clock Control 0
PLL and Clock Control 1
DAC Control 0
DAC Control 1
DAC Control 2
DAC individual channel mutes
DAC L1 volume control
DAC R1 volume control
DAC L2 volume control
DAC R2 volume control
DAC L3 volume control
DAC R3 volume control
DAC L4 volume control
DAC R4 volume control
ADC Control 0
ADC Control 1
ADC Control 2
Function
Normal operation
Power-down
INPUT 256 (× 44.1 kHz or 48 kHz)
INPUT 384 (× 44.1 kHz or 48 kHz)
INPUT 512 (× 44.1 kHz or 48 kHz)
INPUT 768 (× 44.1 kHz or 48 kHz)
XTAL oscillator enabled
256 × f
512 × f
Off
MCLKI/XI
DLRCLK
ALRCLK
Reserved
Disable: ADC and DAC idle
Enable: ADC and DAC active
S
S
VCO output
VCO output
R/W
16
Rev. C | Page 24 of 32
Description
PLL power-down
MCLKI/XI pin functionality (PLL active), master clock rate setting
MCLKO/XO pin, master clock rate setting
PLL input
Internal master clock enable
Register Address
15:8
Data
7:0