AD1845JP Analog Devices Inc, AD1845JP Datasheet - Page 18

• Manufacturer Part Number: AD1845JP
• Description: IC CODEC STEREO 5V 16BIT 68PLCC
• Manufacturer: Analog Devices Inc
• Type: Stereo Audior

Specifications of AD1845JP

• Rohs Status: RoHS non-compliant
• Resolution (bits): 16 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 81 / 82
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC

AD1845
RX2A4:0
res
RMX2
This register’s initial state after reset is “1xx0 1000.”
LDA5:0
res
LDM
This register’s initial state after reset is “1x00 0000.”
RDA5:0
res
RDM
This register’s initial state after reset is “1x00 0000.”
Left DAC Control (IXA3:0 = 6)
Right DAC Control (IXA3:0 = 7)
IXA3:0
IXA3:0
6
7
Right Auxiliary Input #2 Attenuate Select. The least significant bit of this gain/attenuate select represents
1.5 dB. RX2A4:0 = 0 produces a +12 dB gain. RX2A4:0 = “01000” (8 decimal) produces 0 dB gain.
Maximum attenuation is –34.5 dB. See Figure 10.
Reserved for future expansion. Always write zeros to these bits.
Right Auxiliary #2 Mute. This bit, when set, will mute the right channel of the Auxiliary #2 input source. This bit
powers up set.
Left DAC Attenuate Select. The least significant bit of this gain/attenuate select represents 1.5 dB. Maximum
attenuation is –94.5 dB. See Figure 7.
Reserved for future expansion. Always write a zero to this bit.
Left DAC Mute. This bit, when set to 1, will mute the left DAC output. This bit powers up active.
Right DAC Attenuate Select. The least significant bit of this gain/attenuate select represents 1.5 dB. Maximum
attenuation is –94.5 dB. See Figure 7.
Reserved for future expansion. Always write a zero to this bit.
Right DAC Mute. This bit, when set to 1, will mute the right DAC output. This bit powers up active.
A5
0
0
0
0
0
0
0
•
•
•
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
Data 7
Data 7
LDM
RDM
A4
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
Data 6
Data 6
res
res
Figure 7. Mix Gain Level Setting: DAC
A3
0
0
0
0
0
0
0
0
1
1
1
1
•
•
•
0
0
0
0
1
1
1
1
1
1
1
1
Data 5
LDA5
Data 5
RDA5
A2
0
0
0
0
1
1
1
1
0
0
0
0
•
•
•
1
1
1
1
0
0
0
0
1
1
1
1
–18–
Data 4
Data 4
LDA4
RDA4
A1
0
0
1
1
0
0
1
1
0
0
1
1
•
•
•
0
0
1
1
0
0
1
1
0
0
1
1
Data 3
Data 3
LDA3
RDA3
A0
0
1
0
1
0
1
0
1
0
1
0
1
•
•
•
0
1
0
1
0
1
0
1
0
1
0
1
Data 2
Data 2
LDA2
RDA2
1–1.0 dB
1–1.5 dB
1–3.0 dB
1–4.5 dB
1–6.0 dB
1–7.5 dB
1–9.0 dB
–10.5 dB
–12.0 dB
–13.5 dB
–15.0 dB
–16.5 dB
•
•
•
– 78.0 dB
– 79.5 dB
– 81.0 dB
– 82.5 dB
– 84.0 dB
– 85.5 dB
– 87.0 dB
– 88.5 dB
– 90.0 dB
– 91.5 dB
– 93.0 dB
– 94.5 dB
Mix Gain
•
•
•
Data 1
Data 1
LDA1
RDA1
Data 0
LDA0
Data 0
RDA0
REV. C