Datasheet AD1984B Datasheet (ANALOG DEVICES)

High Definition Audio

ADC0

ADC1

DAC0

DM_CLK

DM_1/2
DM_2

DIGITAL

MICROPHONE

MONO OUT

PORT A

PORT D

PORT F

AD1984B

H
D

A
U
D

I

O

I
N
T
E
R
F
A
C
E

PORT B

PORT E

PORT C

DAC1

⌺

⌺

⌺

⌺

⌺

PCBEEP

HP

HP

⌺

DIGITAL
PCBEEP

S/PDIF-2

S/PDIF-1

http://www.BDTIC.com/ADI

SoundMAX Codec

AD1984B

FEATURES

Microsoft Vista Premium Logo for desktop

96+ dB audio outputs, 90 dB audio inputs

WLP 3.0 and 4.0
Security feature prevents unauthorized recording
2 stereo headphone amplifiers
Internal 32-bit arithmetic for greater accuracy
Impedance and presence detection on all jacks
Full analog mixer with DAC inputs
3 independent microphone bias pins
Digital and analog PCBeep
3 general-purpose digital I/O (GPIO) pins

3.3 V analog supply voltage

1.7 V to 1.9 V or 3.3 V digital supply voltages

3.3 V HD-Audio link signaling voltage
Advanced power management modes
48-lead LFCSP_VQ package

192 kHz DACs/ADCs

2 independent stereo DAC/ADC pairs
Simultaneous record of 2 stereo channels
Simultaneous playback of 2 stereo channels
Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz

sample rates
16-, 20-, and 24-bit resolution
Selectable stereo mixer on outputs

STEREO DIGITAL MICROPHONE INTERFACE

Two 192 kHz digital microphone channels
Supports 1 or 2 microphones per pin
Selectable bit clock rates of 1.5 MHz, 2.0 MHz, and 3.0 MHz
Mono and stereo array support 8 kHz, 11.025 kHz, 16 kHz,

22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,

176.4 kHz, and 192 kHz sample rates

16-, 20-, and 24-bit resolution

S/PDIF OUTPUT

Second S/PDIF can support external HDMI interface
Supports 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and

192 kHz sample rates
16-, 20-, and 24-bit data; PCM and AC3 formats
Digital PCM gain control

AUXILIARY PINS

Stereo CD/auxiliary I/O port with ground sense
Stereo auxiliary/dock I/O port
Mono out pin for internal speakers or telephony

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

Figure 1. Functional Block Diagram

One Technology Way, P.O.Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2008 Analog Devices, Inc. All rights reserved.

AD1984B

http://www.BDTIC.com/ADI

CONTENTS

Features ................................................................. 1

Revision History ...................................................... 2

Ge

neral Description ................................................. 3

Additional Information .......................................... 3

Jack Configuration ................................................ 3

AD1984B Specifications ............................................ 4

Test Conditions .................................................... 4

Performance ........................................................ 4

General Specifications ............................................ 4

HD–Audio Link Specification .................................. 7

Power-Down States ............................................... 7

Absolute Maximum Ratings .................................... 8

ESD Caution ........................................................ 8

Environmental Conditions ...................................... 8

Pin Configuration and Function Descriptions ................. 9

Digital Microphone Interface Timing Specifications ....... 12

HD Audio Widgets ................................................ 13

HD Audio Parameters ............................................. 14

Widget Parameters ................................................. 15

Connection List ..................................................... 16

Default Configuration Bytes ..................................... 17

Outline Dimensions ............................................... 18

Ordering Guide ..................................................... 18

REVISION HISTORY

2/08—Rev 0. Initial version

Rev. 0 | Page 2 of 20 | February 2008

GENERAL DESCRIPTION

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AD1984B

The AD1984B audio codec and SoundMAX® software provide
superior high definition audio quality that exceeds Vista Pre­mium performance. The AD1984B has two 192 kHz DAC pairs,
two 192 kHz ADC pairs, dual S/PDIF outputs, a 2-channel digi­tal microphone interface, and digital and analog PCBeep. These
features make the AD1984B the right choice for desktop and
notebook PCs where performance is key. For more information
on SoundMAX codecs and software see the Analog Devices,
Inc., website at www.analog.com/soundMAX.

The AD1984B has two S/PDIF outputs that can connect to both
S/PDIF jacks and external HDMI

The AD1984B is available in a 48-lead, RoHS compliant frame
chip scale package in both reels and trays. See Ordering Guide

on Page 18.

TM

encoder devices.

ADDITIONAL INFORMATION

This data sheet provides a general overview of the AD1984B
SoundMAX codec’s architecture and functionality. Detailed
widget information is available in the AD1984B Programmers
Reference Manual. Please contact your local ADI sales represen­tative for more information.

JACK CONFIGURATION

The guidelines shown in Table 1 through Table 3 should be
used when selecting ports for particular functions.

Table 3. Typical Notebook Configuration with Dock
Interface

Port Function

Port A Headphone
Port B Microphone
Port C Internal Microphone
Port D Dock Line-Out/Headphone
Port E Dock Line-In/Microphone
Port F Internal Stereo Speakers
S/PDIF-1 Optical/RCA S/PDIF Output
S/PDIF-2 HDMI Encoder Audio Source

Table 1. Typical Desktop Configuration

Port Function

Port A Front Panel Headphone
Port B Front Panel Microphone
Port C Rear Panel Line-In/Microphone
Port D Rear Panel Line-Out/Headphone
S/PDIF-1 Optical/RCA S/PDIF Output
S/PDIF-2 HDMI Encoder Audio Source

Table 2. Typical Notebook Configuration

Port Function

Port A Headphone
Port B Microphone
Port C Internal Microphone
Port F Internal Stereo Speakers
S/PDIF-1 Optical/RCA S/PDIF Output
S/PDIF-2 HDMI Encoder Audio Source

Rev. 0 | Page 3 of 20 | February 2008

AD1984B

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AD1984B SPECIFICATIONS

TEST CONDITIONS

Parameter Test Condition

Tem pe ra tu re
Digital Supply
Analog Supply
MIC_BIAS_IN (via Low-Pass Filter)
Sample Rate f

S

Input Signal (Frequency Sine Wave)
Amplitude for THD + N
Analog Output Pass Band
DAC 10 kΩ Output Load: Line-Out Tests

ADC 0 dB Gain

PERFORMANCE

Parameter Min Typ Max Unit

Line-Out Drive (10 kΩ loads—DAC to Pin)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to f
Signal-to-Noise Ratio
Headphone Drive (32 Ω loads—DAC to Pin)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to f
Signal-to-Noise Ratio
Microphone/Line-In (Pin to ADC, Mic Boost = 0 dB)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to f
Signal-to-Noise Ratio

25°C

3.3 V

3.3 V

5.0 V
48 kHz
1008 Hz
–3.0 dB Full Scale
20 Hz to 20 kHz

32 Ω Output Load: Headphone Tests

A-Weighted)

S

A-Weighted)

S

A-Weighted)

S

–86
96
96

–80
96
96

–81
90
90

dB
dB
dB

dB
dB
dB

dB
dB
dB

GENERAL SPECIFICATIONS

Parameter Min Typ Max Unit

DIGITAL DECIMATION AND INTERPOLATION FILTERS

Pass Band – fS (kHz) = 8 ~ 192 0 0.4 f
Pass-Band Ripple– f
Stop Band – f
Stop-Band Rejection – f
Group Delay – f

(kHz) = 8 ~ 192 ±0.005 dB

S

(kHz) = 8 ~ 192 0.6 f

S

S

(kHz) = 8 ~ 192 –100 dB

S

(kHz) = 8 ~ 192 20 1/f

Group Delay Variation over Pass Band 0 μs

ANALOG-TO-DIGITAL CONVERTERS

Resolution 24 Bits
Gain Error (Full-Scale Span Relative to Nominal Input Voltage) ±10 %
Interchannel Gain Mismatch (Difference of Gain Errors) ±0.2 ±0.5 dB
ADC Offset Error
ADC Crosstalk

1

1

Line-Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L) –85 dB
Line_In to Other –100 –80 dB

1

Rev. 0 | Page 4 of 20 | February 2008

S

S

Hz

Hz

±5mV

S

AD1984B

http://www.BDTIC.com/ADI

Parameter Min Typ Max Unit

DIGITAL-TO-ANALOG CONVERTERS

Resolution 24 Bits
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors) ±0.5 dB
Total Audible Out-of-Band Energy (Measured from 0.6 × fS to 20 kHz)
DAC Crosstalk (Input L, Zero R, Measure R_OUT; Input R, Zero L, Measure L_OUT)

DAC VOLUMES

Step Size 1.5 dB
Output Gain/Attenuation Range –58.5 0 dB
Mute Attenuation of 0 dB Fundamental

1

ADC VOLUMES

StepSize 1.5 dB
PGA Gain/Attenuation Range –58.5 +22.5 dB
Mute Attenuation of 0 dB Fundamental

1

ANALOG MIXER

Signal-to-Noise Ratio Input to Output—Ports B, C, E, or F to Port D Output 95 dB
Step Size: All Mixer Inputs –1.5 dB
Input Gain/Attenuation Range: All Mixer Inputs –34.5 +12.0 dB

ANALOG LINE LEVEL OUTPUTS

Full-Scale Output Voltage 1.0

Ports A, D, E, F, and Mono Out

Output Impedance
External Load Impedance
Output Capacitance
External Load Capacitance

ANALOG HP DRIVE OUTPUTS

Full-Scale Output Voltage 1.0

Ports A and D

Output Impedance
External Load Impedance
Output Capacitance
External Load Capacitance

ANALOG INPUTS

Input Voltages—Ports B, C, E, or F

Mic Boost = 0 dB 1

Input Voltages—Microphone Boost

Mic Boost = 10 dB 0.316

Amplifier, Ports B, C, or E

Mic Boost = 20 dB 0.1

Mic Boost = 30 dB 0.032

Input Impedance
PCBeep
Ports B, C, E (Mic Boost = 0 dB)
Port F
Input Capacitance

1

1

1

1

–85 dB
–95 dB

±10 %

–80 dB

–80 dB

V rms

2.83

1

1

1

1

10 kΩ

190 Ω

15 pF

1000 pF

V p-p

V rms

2.83

1

1

1

1

32 Ω

15 pF

0.5 Ω

1000 pF

V p-p

V rms

2.83

V p-p
V rms

0.894

V p-p
V rms

0.283

V p-p
V rms

0.089

23
150
45

V p-p

kΩ
kΩ
kΩ

57.5pF

Rev. 0 | Page 5 of 20 | February 2008

AD1984B

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Parameter Min Typ Max Unit

MICROPHONE BIAS

MIC_BIAS-B, MIC_BIAS-C
MIC_BIAS_IN (Pin 33) = 5 V or 3.3 V V

V
MIC_BIAS_IN (Pin 33) = 5 V V
V
MIC_BIAS_IN (Pin 33) = 3.3 V V

Setting = High-Z High-Z

REF

V

Setting = 0 V 0 V dc

REF

Setting = 50% 1.65 V dc

REF

Setting = 80% 3.7 V dc

REF

Setting = 100% 3.9 V dc

REF

Setting = 80% 2.86 V dc

REF

V

Setting = 100% 3.0 V dc

REF

MIC_BIAS-E (When Enabled as BIAS) V

Output Drive Current V

Setting = High-Z High-Z

REF

Setting = 0 V 0 V dc

V

REF

V

Setting = 50% 1.65 V dc

REF

Setting = 80% 2.86 V dc

V

REF

V

Setting = 100% 3.0 V dc

REF

Setting = 50%, 80%, or 100% 1.6 mA

REF

GPIO 0

Input Signal High (VIH)DV
Input Signal Low (V
Output Signal High (V
Output Signal Low (V
Input Leakage Current (Signal High) (I
Input Leakage Current (Signal Low) (I

)0DV

IL

) I

OH

)I

OL

IH

)–50μA

IL

= –500 μADV

OUT

= +1500 μA0DV

OUT

)150nA

× 0.60 DV

IO

× 0.72 DV

IO

IO

× 0.24 V

IO

IO

× 0.10 V

IO

V

V

GPIO 1 and 2

Input Signal High (VIH)AV
Input Signal Low (V
Output Signal High (V
Output Signal Low (V
Input Leakage Current (Signal High) (I
Input Leakage Current (Signal Low) (I

)0AV

IL

)I

OH

)I

OL

IH

)–50μA

IL

= –500 μAAV

OUT

= +1500 μA0AV

OUT

)150nA

× 0.60 AV

DD

× 0.72 AV

DD

DD

× 0.24 V

DD

DD

× 0.10 V

DD

V

V

DM Clock

Output Signal High (VOH)I
Output Signal Low (V

)I

OL

= –500 μAAV

OUT

= +1500 μA0AV

OUT

× 0.72 AV

DD

DD

× 0.10 V

DD

V

DM 1/2 and DM_2

Input Signal High (V
Input Signal Low (V

)AV

IH

)0AV

IL

Input Leakage Current (Signal High) (I
Input Leakage Current (Signal Low) (I

)–150nA

IH

)–50nA

IL

× 0.60 AV

DD

DD

× 0.24 V

DD

V

S/PDIF-Out-1 and S/PDIF-Out-2

Input Signal High (V
Input Signal Low (V
Output Signal High (V
Output Signal Low (V

)DV

IH

)0DV

IL

) I

OH

)I

OL

Input Leakage Current (Signal High) (I
Input Leakage Current (Signal Low) (I

= –500 μADV

OUT

= +1500 μA0DV

OUT

)150nA

IH

)–50μA

IL

× 0.60 DV

IO

× 0.72 DV

IO

IO

× 0.24 V

IO

IO

× 0.10 V

IO

V

V

Rev. 0 | Page 6 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

Parameter Min Typ Max Unit

POWER SUPPLY

Analog (AV
Power Supply Range
Power Dissipation
Supply Current
Digital (DVDD) 3.3 V ±10%

Power Supply Range
Power Dissipation
Supply Current
Digital (DV

Power Supply Range
Power Dissipation
Supply Current
Digital I/O (DV
Power Supply Range
Power Dissipation
Supply Current
Power Supply Rejection (Reference to f

1

Guaranteed but not tested.

HD–AUDIO LINK SPECIFICATION

High definition audio signals comply with the High Definition
Audio Specification. Please refer to these specifications at
www.intel.com/standards/hdaudio.

) 3.3 V ±5%

DD

) 1.7 through 1.9 V ±10%

DD

) 3.3 V ±10%

IO

3.13 3.30

3.46 V

75.9
23

2.97 3.30

3.63 V

141.9
43

1.615 1.70

1.995 V
61
36

2.97 3.30

3.63 V

3.3
1

100 mV p-p Signal @ 1 kHz)1 80 dB

S

mW
mA

mW
mA

mW
mA

mW
mA

POWER-DOWN STATES

Parameter ID

Function node in D0, All Nodes Active 36 43 23 mA
Function Node in D3 15.75 17 1 mA
Codec in RESET
Individual block power savings
DAC Pair Powered Down Saves (Each)
ADC Pair Powered Down Saves (Each)
Mixer Power Control (and Associated Amps) Saves
DM_CLK Powered Down Saves
MIC_BIAS Powered Down Saves

1

Test conditions: 30 pF load, 2.0 MHz frequency, 3.3 V A

2

Powering down the MIC_BIAS powers down all port MIC_BIAS pins. This disables all microphone bias circuits set to 100% or 50%, setting them to the high-Z state. The

0 V and high-Z states remain unaffected by the MIC_BIAS power state.

1

2

VDD.

Typ (1.7 V ) ID

VDD

Typ (3.3 V) IA

VDD

Typ Unit

VDD

333mA

4.5

4.5
0
0
0

6
6
0
0
0

5
3
2
1

0.1

mA
mA
mA
mA
mA

Rev. 0 | Page 7 of 20 | February 2008

AD1984B

ESD (electrostatic discharge) sensitive device.

Charged devices and circuit boards can discharge
without detection. Although this product features
patented or proprietary protection circuitry, damage
may occur on devices subjected to high energy ESD.
Therefore, proper ESD precautions should be taken to
avoid

performance degradation or loss of functionality.

http://www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Stresses greater than those listed below may cause permanent
damage to the device. This is a stress rating only; functional
operation of the device at these or any other conditions above
those indicated in the operational section of this specification is
not implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.

Parameter Rating

Digital (DV
Digital (DV
Digital I/O (DV
Analog (AV

) –0.30 V to +3.65 V

DD

) –0.30 V to +2.10 V

CORE

) –0.30 V to +3.65 V

IO

) –0.30 V to +3.65 V

DD

Input Current (except supply pins) ±10.0 mA
Analog Input Voltage (Signal Pins) –0.30 V to AVDD +0.3 V
Digital Input Voltage (Signal Pins) –0.30 V to DV

+0.3 V

IO

Ambient Temperature (Operating) 0°C to +70°C
Storage Temperature –65°C to +150°C

ESD CAUTION

ENVIRONMENTAL CONDITIONS

Ambient Temperature Rating:

T

= T

AMB

T

CASE

PD = power dissipation in W

= thermal resistance (case-to-ambient)

θ

CA

θ

= thermal resistance (junction-to-ambient)

JA

θ

= thermal resistance (junction-to-case)

JC

All measurements per EIA-JESD51 with 2S2P test board per
EIA-JESD51-7.

Package θ

LFCSP_VQ 47 15 32 °C/W

– (PD × θCA)

CASE

= case temperature in °C

JA

θ

JC

θ

CA

Unit

Rev. 0 | Page 8 of 20 | February 2008

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

1

2

3

4

5

6

7

8

9

10

11

12

242313 14 15 16 17 18 19 20 21 22

34

33

36

35

25

26

27

28

29

30

31

32

44 434748 4546 373839404142

AD1984BJCP

TOP VIEW

(Not To Scale)

DV

CORE

DM_1/2

DV

IO

DM_2

SDATA_OUT

BIT_CLK

DV

SS

SDATA_IN

DV

DD

SYNC

RESET

PCBEEP

PORT-D_R

PORT-D_L

P

O

R

T

-

C

_

R

P

O

R

T

-

C

_

L

P

O

R

T

-

B

_

R

P

O

R

T

-

E

_

L

P

O

R

T

-

F

_

R

P

O

R

T

-

F

_

L

P

O

R

T

-

B

_

L

P

O

R

T

-

E

_

R

C

D

_

G

N

D

(

P

O

R

T

-

F

)

S

E

N

S

E

_

A

/

S

R

C

_

B

SENSE_B/SRC_A

P

O

R

T

-

A

_

L

P

O

R

T

-

A

_

R

E

A

P

D

/

G

P

I

O

_

0

R

E

S

E

R

V

E

D

(

N

C

)

A

V

D

D

D

M

_

C

L

K

R

E

S

E

R

V

E

D

(

N

C

)

R

E

S

E

R

V

E

D

(

N

C

)

A

V

S

S

S

P

D

I

F

_

O

U

T

-

1

R

E

S

E

R

V

E

D

(

N

C

)

MIC_BIAS_IN

MIC_BIAS-B

MIC_BIAS-C

GPIO_2

MIC_BIAS-E/GPIO_1

MONO_OUT

AV

DD

AV

SS

VREF_FLT

R

E

S

E

R

V

E

D

(

N

C

)

R

E

S

E

R

V

E

D

(

N

C

)

R

E

S

E

R

V

E

D

(

N

C

)

http://www.BDTIC.com/ADI

AD1984B

Figure 2. AD1984B 48-Lead Package and Pinout

Rev. 0 | Page 9 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

Table 4. Pin Function Descriptions

Mnemonic Pin No. I/O Description

DIGITAL INTERFACE
SDATA_OUT

BIT_CLK
SDATA_IN

SYNC
RESET
DIGITAL I/O and EAPD
DM_1/2

DM_2
DM_CLK
GPIO_2

MIC_BIAS-E/GPIO_1

EAPD/GPIO_0

S/PDIF_OUT-2

S/PDIF_OUT-1
JACK SENSE
SENSE_A/SRC_B
SENSE_B/SRC_A
ANALOG I/O
PCBEEP
Port-E_L
Port-E_R
Port-F_L
Port-F_R
CD_GND

Port-B_L
Port-B_R
Port-C_L
Port-C_R
MONO_OUT

Port-D_L
Port-D_R
Port-A_L
Port-A_R

The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = outpu
head

pho

ne load, MIC = input supports microphones with MIC bias and boost amplifier.

5

6
8

10
11

2

4
46
30

31

47

45

48

13
34

12
14
15
16
17
19

21
22
23
24
32

35
36
39
41

I

I
I/O

I
I

I

I
O
I/O

I/O

I/O

O

O

I/O
I/O

LI
LI, MIC, LO
LI, MIC, LO
LI, LO
LI, LO
I

LI, MIC
LI, MIC
LI, MIC
LI, MIC
LO
HP, LO
HP, LO
HP, LO
HP, LO

Link Serial Data Output. AD1984B input stream. Clocked on both edges of the
BIT_CLK.
Link Bit Clock. 24.000 MHz serial data clock.
Link Serial Data Input. AD1984B output stream clocked only on one edge of BIT_CLK.
Link Frame Sync.
Link Reset. AD1984B master hardware reset.

Digital microphone 1 and 2 Inputs (for Biphase Microphones), or Digital Microphone
1 Input (for Single-phase Microphones).
Digital microphone 2 Input (for Single-phase Microphones).
Clock to drive external digital microphones.
General Purpose Input/Output Pins. Digital signals used to control or sense external
circuitry.
Microphone Bias for Port E/General-Purpose Input/Output. Capable of High-Z, 1.65 V,
and 2.86 V. Pin 31 shares functionality between MIC_BIAS_E (default) and GPIO_1.
These functions are mutually exclusive and the MIC_BIAS function takes priority over
the GPIO function.
EAPD/General-Purpose Input/Output pin. Pin 47 shares functionality between
GPIO_0 and EAPD. These functions are mutually exclusive and the EAPD function
takes priority over the GPIO function. By default, the pin is in a High-Z state. External
resistors should be used to ensure the proper circuit state when this pin is in High-Z.
Supports S/PDIF Output. Typically used as an audio interface to an external HDMI
encoder.
Supports S/PDIF Output.

Jack Sense A-D Input/Sense B drive.
Jack Sense E-F Input/Sense A drive.

Monaural Input from System for Analog PCBeep.
Auxiliary Input/Output Left Channel.
Auxiliary Input/Output Right Channel.
Auxiliary Input/Output Left Channel.
Auxiliary Input/Output Right Channel.
CD-Audio-Analog-Ground-Reference. Must be connected to AGND via a 0.1 μF
capacitor if not in use as CD_GND. MUST always be ac-coupled.
Front Panel Stereo MIC/Line-In.
Front Panel Stereo MIC/Line-In.
Rear Panel Stereo MIC/Line-In.
Rear Panel Stereo MIC/Line-In.
Monaural Output to Internal Speaker or Telephony Subsystem Speakerphone.
Rear Panel Headphone/Line-Out.
Rear Panel Headphone/Line-Out.
Front Panel Headphone/Line-Out.
Front Panel Headphone/Line-Out.

t capable of driving

Rev. 0 | Page 10 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

Table 4. Pin Function Descriptions (Continued)

Mnemonic Pin No. I/O Description

FILTER/MIC_BIAS
V

_FILT

REF

MIC_BIAS-B
MIC_BIAS-C

MIC_BIAS_IN

5.0 V or 3.3 V

POWER AND GROUND
DV

1.7 V to 1.9 V or

CORE

FILTER

DV

3.3 V 3 I Link Digital I/O Voltage Reference. 3.3 V ± 10%

IO

DV

SS

DV

1.7 V to 1.9 V or 3.3 V 9 I Digital Supply Voltage 3.3 V ± 10%. This is regulated down to DV

DD

3.3 V 25, 38 I CAUTION: DO NOT APPLY 5 V TO THESE PINS! Analog Supply Voltage 3.3 V ONLY.

AV

DD

AV

SS

The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = output capable of driving
headphone load, MIC = input supports microphones with MIC bias and boost amplifier.

27
28
29

O
O

O

Voltage Reference Filter.
Switchable Microphone Bias. For use with Port B (Pins 21, 22).
Switchable Microphone Bias. For use with Port C (Pins 23, 24).

Both MIC bias pins are capable of High-Z, 0 V, 1.65 V, 3.7 V, and 3.9 V (with 5.0 V on
Pin 33), High-Z, 0 V, 1.65 V, 2.86 V, and 3.0 V (with 3.3 V on Pin 33).

33

I

Source Power for Microphone Bias Boost Circuitry.
Connect this pin to 5.0 V via a low-pass filter. When connected this way the AD1984B

is capable of providing 3.9 V as a mic bias to all of the mic bias pins (except on Pin 31).
If 5 V is not available, connect this pin to 3.3 V (AV

) via a low-pass filter.

DD

1 I/O CAUTION: DO NOT APPLY 3.3 V TO THIS PIN! Filter connection for internal core

voltage regulator.
If Pin 9 is connected to 3.3 V DV

1.0 μF and 0.1μF connected in parallel between Pin 1 and DV

, this pin must be connected to filter caps: 10 μF,

DD

(Pin 7). Direct, filtered

SS

1.7 V to 1.9 V DVDD may be applied to Pin 1 to lower the digital power requirements.
Pin 9 MUST be connected to pin 1 in this case.

7 I Digital Supply Return (Ground).

on Pin 1 to

CORE

supply the internal digital core internal to the AD1984B. Direct, filtered 1.7 V to 1.9 V
DVDD may be applied to Pin 1 to lower the digital power requirements. Pin 9 MUST be
connected to Pin 1 in this case.

Note: AV

supplies should be well regulated and filtered as supply noise degrades

DD

audio performance.

26, 42 I Analog Supply Return (Ground). AVSS should be connected to DVSS using a

conductive trace under, or close to, the AD1984B.

Rev. 0 | Page 11 of 20 | February 2008

AD1984B

DM_CLK

t

1

t

2

t

3

DM_1/2

t

0

DATA VALID

t

4

DM_CLK

t

1

t

2

t

3

DM_2

t

0

DATA VALID

t

4

http://www.BDTIC.com/ADI

DIGITAL MICROPHONE INTERFACE TIMING SPECIFICATIONS

The digital microphone interface can support one or two digital
microphones using two or three codec pins. Both uniplex (one
microphone per data pin) and multiplex (two microphones
sharing the same data pin) are supported. The timing for these

configurations is shown in Table 5 and Figure 3, Figure 4 and

Figure 5. The interface can generate a microphone clock at 1.5

MHz, 2.0 MHz, or 3.0 MHz to suit quality and power
requirements.

Table 5. Microphone Timing Parameters

Parameter Description Min Typ Max Unit

Timing Requirements

t

0

t

0

t

0

t

1

t

2

t

3

t

4

DM_CLK (1.5 MHz) Period
Duty Cycle
DM_CLK (2.0 MHz) Period
Duty Cycle
DM_CLK (3.0 MHz) Period
Duty Cycle

667
50/50
500
50/50
333
50/50

ns
%
ns
%
ns

%
DM_CLK Rise Time 5 ns
DM_CLK Fall Time 5ns
Data Setup to DM_CLK Edge 10 ns
Data Hold from DM_CLK Edge 5 ns

Figure 3. Uniplex Microphone Timing

Figure 4. DM_2 Uniplex Microphone Timing

Rev. 0 | Page 12 of 20 | February 2008

HD AUDIO WIDGETS

DM_CLK

t

1

t

2

t

3

DM_1/2

t

0

LEFT DATA VALID

RIGHT DATA VALID LEFT DATA VALID

t

4

t

3

t

4

http://www.BDTIC.com/ADI

AD1984B

Figure 5. Multiplex Microphone Timing

Table 6. HD Audio Widgets

1

Node ID Name Type ID Type Description

0x00 ROOT x Root Device identification
0x01 FUNCTION x Function Designates this device as an audio codec
0x02 S/PDIF-1 DAC 0 Audio Output S/PDIF digital stream output interface
0x03 DAC_0 0 Audio Output Stereo headphone channel digital/audio converter
0x04 DAC_1 0 Audio Output Stereo front channel digital/audio converter
0x06 S/PDIF-2 DAC 0 Audio Output S/PDIF digital stream output interface (typically for HDMI)
0x07 Port A Mixer 2 Audio Mixer Mixes the of DAC_(0, 1) and analog mixer output to drive Port A
0x08 ADC_0 1 Audio Input Stereo record Channel 0 audio/digital converters
0x09 ADC_1 1 Audio Input Stereo record Channel 1 audio/digital converters
0x0A Port D Mixer 2 Audio Mixer Mixes the DAC_1 and analog mixer output to drive Port D
0x0B Port F Mixer 2 Audio Mixer Mixes the DAC_(0, 1) and analog mixer output to drive Port F
0x0C ADC Selector 0 3 Audio Selector Selects and amplifies/attenuates the input to ADC_0
0x0D ADC Selector 1 3 Audio Selector Selects and amplifies/attenuates the input to ADC_1
0x0E Mono Out Selector 3 Audio Selector Selects the mono out DAC_(0, 1)
0x0F Port F Out Selector 3 Audio Selector Selects the Port F DAC_(0, 1)
0x10 Digital Beep 7 Beep Generator Internal digital PCBeep signal
0x11 Port A (Headphone) 4 Pin Complex Headphone jack pins
0x12 Port D (Line Out) 4 Pin Complex Line out jack pins
0x13 Mono Out 4 Pin Complex Monaural output pin (internal speakers or telephony system)
0x14 Port B (Mic In) 4 Pin Complex Microphone in jack pins
0x15 Port C (Line In) 4 Pin Complex Line in jack pins
0x16 Port F (Aux In/Out) 4 Pin Complex Auxiliary I/O pins
0x17 Dig Mic Pin 4 Pin Complex Digital microphone input pin
0x18 S/PDIF Out-2 4 Pin Complex S/PDIF Out Pin recommended for HDMI
0x19 Mixer Power Down 5 Power Widget Powers down the analog mixer and associated amps
0x1A Analog PCBeep 4 Pin Complex External analog PCBeep signal input
0x1B S/PDIF Out-1 4 Pin Complex S/PDIF output pin
0x1C Port E (Dock I/O) 4 Pin Complex Analog dock I/O pins
0x1D V

Power Down F Vendor Defined Powers down the V

REF

circuitry

REF

0x1E Mono Out Mixer 2 Audio Mixer Mixes the DAC_(0, 1) and analog mixer output to drive mono out
0x1F Stereo Mix-Down 2 Audio Mixer Mixes the stereo L/R channels to drive mono output
0x20 Analog Mixer 2 Audio Mixer Mixes individually gainable analog inputs
0x21 Mixer Output Atten 3 Audio Selector Attenuates the analog mixer output to drive the port mixers
0x22 Port A Out Selector 3 Audio Selector Selects the Port A DAC_(0, 1)
0x23 Port E Out Selector 3 Audio Selector Selects the Port E DAC_(0, 1)
0x24 Port E Mixer 2 Audio Mixer Mixes the DAC_(0, 1) and analog mixer output to drive Port E
0x25 Port E Mic Boost 3 Audio Selector 0 dB, 10 dB, 20 dB, or 30 dB gain boost for Port E

1

All node IDs (NIDs) are sequential in the codec. Any NIDs missing for this table are vendor defined.

Rev. 0 | Page 13 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

HD AUDIO PARAMETERS

Table 7. Root and Function Node Parameters

Vendor ID

Node ID Name

0x00 ROOT 0x11D4 194B 0x0010 0200 0x0001 0001
0x01 FUNCTION 0x0002 002B 0x0000 0001 0x0001 0C0C 0x4000 0003

1

Subject to change with silicon stepping.

Table 8. Subsystem ID

Node ID Name Type Value

0x01 FUNCTION Function 0xBFD4 0000 0xBFD4 0x00 0x00

00

Revision ID

1

02

Sub Node Count04Func. Group Type05Audio F.G. Caps08GPIO Caps

11

31:16
SSID

15:8
SKU

7:0
ASM ID

Rev. 0 | Page 14 of 20 | February 2008

WIDGET PARAMETERS

http://www.BDTIC.com/ADI

Table 9. Widget Parameters

AD1984B

Widget

Node

Capabilities

ID

0x09

0x01 0x0000 04C0 0x000E 07FF 0x0000 0001 0x8000 0000 0x0000 0009 0x0005 2727
0x02 0x0003 0211 0x000E 07E0 0x0000 0005 0x0000 0000
0x03 0x0000 0405 0x000E 07FF 0x0000 0001 0x0000 0000 0x0000 0009 0x0005 2727
0x04 0x0000 0405 0x000E 07FF 0x0000 0001 0x0000 0000 0x0000 0009 0x0005 2727
0x06 0x0003 0211 0x000E 07E0 0x0000 0005 0x0000 0000
0x07 0x0020 0103 0x8000 0000 0x0000 0002
0x08 0x0010 0501 0x000E 07FF 0x0000 0001 0x0000 0001 0x0000 0009
0x09 0x0010 0501 0x000E 07FF 0x0000 0001 0x0000 0001 0x0000 0009
0x0A 0x0020 0103 0x8000 0000 0x0000 0002
0x0B 0x0020 0103 0x8000 0000 0x0000 0002
0x0C 0x0030 010D 0x0000 0006 0x8005 3627
0x0D 0x0030 010D 0x0000 0006 0x8005 3627
0x0E 0x0030 0101 0x0000 0002
0x0F 0x0030 0101 0x0000 0002
0x10 0x0070 000C 0x0000 0000 0x800B 0F0F
0x11 0x0040 018D 0x0000 001F 0x0000 0001 0x8000 0000
0x12 0x0040 058D 0x0001 001F 0x0000 0001 0x0000 0009 0x8000 0000
0x13 0x0040 050C 0x0001 0010 0x0000 0001 0x0000 0009 0x8005 1F1F
0x14 0x0040 008B 0x0000 3727 0x0027 0300 0x0000 0000
0x15 0x0040 008B 0x0000 3727 0x0027 0300 0x0000 0000
0x16 0x0040 058D 0x0001 0037 0x0000 0001 0x0000 0009 0x8000 0000
0x17 0x0040 020B 0x0000 0020 0x0017 0300 0x0000 0000
0x18 0x0040 038D 0x0000 0014 0x0000 0001 0x8005 2727
0x19 0x0050 0500 0x0000 0002 0x0000 0009
0x1A 0x0040 0000 0x0000 0020 0x0000 0000
0x1B 0x0040 038D 0x0000 0014 0x0000 0001 0x8005 2727
0x1C 0x0040 018D 0x0000 3737 0x0000 0001 0x8000 0000
0x1D 0x00F0 0100 0x0000 000A
0x1E 0x0020 0103 0x8000 0000 0x0000 0002
0x1F 0x0020 0100 0x0000 0001
0x20 0x0020 010B 0x8005 1F17 0x0000 0007
0x21 0x0030 010D 0x0000 0001 0x8005 1F1F
0x22 0x0030 0101 0x0000 0002
0x23 0x0030 0101 0x0000 0002
0x24 0x0020 0103 0x8000 0000 0x0000 0002
0x25 0x0030 010D 0x0000 0001 0x0027 0300

PCM Size,
Rate
0x0A

Stream
Formats
0x0B

Pin
Capabilities
0x0C

Input Amp
Capabilities
0x0D

Con. List
Length
0x0E

Power States
0x0F

Output Amp
Capabilities
0x12

Rev. 0 | Page 15 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

CONNECTION LIST

Table 10. Connection List

Connections 0123456789

Node
ID

[0–3] [4–7] [8–11] NID R

0x02
0x03
0x04
0x06
0x07 0x0000 2122 0x22 0x21
0x08 0x0000 000C 0x0C
0x09 0x0000 000D 0x0D
0x0A 0x0000 2104 0x04 0x21
0x0B 0x0000 210F 0x0F 0x21
0x0C 0x2016 1514 0x0000 1725 0x14 0x15 0x16 0x20 0x25 0x17
0x0D 0x2016 1514 0x0000 1725 0x14 0x15 0x16 0x20 0x25 0x17
0x0E 0x0000 0403 0x03 0x04
0x0F 0x0000 0403 0x03 0x04
0x10
0x11 0x0000 0007 0x07
0x12 0x0000 000A 0x0A
0x13 0x0000 001F 0x1F
0x14
0x15
0x16 0x0000 000B 0x0B
0x17
0x18 0x0000 0006 0x06
0x19 0x0000 2120 0x20 0x21
0x1A
0x1B 0x0000 0002 0x02
0x1C 0x0000 0024 0x24
0x1D 0x118F 0A07 0x1C1A 1996 0x0000 A61E 0x07 0x0A 1 0x0F 0x11 1 0x16 0x19 0x1A 0x1C 0x1E 1 0x26
0x1E 0x0000 210E 0x0E 0x21
0x1F 0x0000 001E 0x1E
0x20 0x1A16 1514 0x004 0325 0x14 0x15 0x16 0x1A 0x25 0x03 0x04
0x21 0x0000 0020 0x20
0x22 0x0000 0403 0x03 0x04
0x23 0x0000 0403 0x03 0x04
0x24 0x0000 2123 0x23 0x21
0x25 0x0000 001C 0x1C

1

R = the MS bit of any node ID indicates a 2-tuple NID pair delineating a continuous range of nodes. If the MS bit is set (=1), that list entry forms a range of entries from the

previous NID to the current NID. For additional information, see chapter 7.1.2, “Node Addressing” in the High Definition Audio Specification.

1

NIDRNIDRNIDRNIDRNIDRNIDRNIDRNIDRNID

Rev. 0 | Page 16 of 20 | February 2008

AD1984B

http://www.BDTIC.com/ADI

DEFAULT CONFIGURATION BYTES

Table 11. Default Configuration Bytes

Bits 31:30 29:28 27:24 23:20

Location

Connectivity

0x11 Port A (Headphone) 0x0321 40F0 Jack External Left HP Out
0x12 Port D (Line Out) 0x2121 4010 Jack Separate Rear HP Out
0x13 Mono Out 0x9017 01F0 Fixed Internal N/A Speaker
0x14 Port B (Mic In) 0x03A1 90F0 Jack External Left Mic In
0x15 Port C (Line In) 0xB7A7 0121 Fixed Other Special 1 Mic In
0x16 Port F (Aux In/Out) 0x9933 012E Fixed Internal Special 3 CD
0x17 Dig Mic Pin 0x97A6 01F0 None Other Special 1 Mic In
0x18 S/PDIF Out-2 0x9855 01F0 Fixed Internal Special 2 Digital Out
0x1A Analog PCBeep 0x90F3 01F0 Fixed Internal N/A Other
0x1B S/PDIF Out-1 0x0145 10F0 Jack External Rear S/PDIF Out
0x1C Port E (Dock I/O) 0x21A1 9020 Jack Separate Rear Mic In

Table 11. Default Configuration Bytes (Continued)

Bits 19:16 15:12 8 7:4 3:0

Node ID Name Value Conn Type Color JD OVRD Def Assn. Seq.

0x11 Port A (Headphone) 0x0321 40F0 1/8” Jack Green 0 0xF 0x0
0x12 Port D (Line Out) 0x2121 4010 1/8” Jack Green 0 0x1 0x0
0x13 Mono Out 0x9017 01F0 Other Analog Unknown 1 0xF 0x0
0x14 Port B (Mic In) 0x03A1 90F0 1/8” Jack Pink 0 0xF 0x0
0x15 Port C (Line In) 0xB7A7 0121 Other Analog Unknown 1 0x2 0x1
0x16 Port F (Aux In/Out) 0x9933 012E ATAPI Unknown 1 0x2 0xE
0x17 Dig Mic Pin 0x97A6 01F0 Other Digital Unknown 1 0xF 0x0
0x18 S/PDIF Out-2 0x9855 01F0 Optical Unknown 1 0xF 0x0
0x1A Analog PCBeep 0x90F3 01F0 ATAPI Unknown 1 0xF 0x0
0x1B S/PDIF Out-1 0x0145 10F0 Optical Black 0 0xF 0x0
0x1C Port E (Dock I/O) 0x21A1 9020 1/8” Jack Pink 0 0x2 0x0

Def. DeviceNode ID Name Value Chassis Position

Rev. 0 | Page 17 of 20 | February 2008

AD1984B

PIN 1
INDICATOR

TOP

VIEW

6.75

BSC SQ

7.00

BSC SQ

1

48

12

13

37

36

24

25

5.25

5.10 SQ

4.95

0.50

0.40

0.30

0.30

0.23

0.18

0.50 BSC

12° MAX

0.20 REF

0.80 MAX

0.65 TYP

1.00

0.85

0.80

5.50
REF

0.05 MAX

0.02 NOM

0.60 MAX

0.60 MAX
PIN 1

INDICATOR

COPLANARITY

0.08

SEATING
PLANE

0.25 MIN

EXPOSED

PAD

(BOTTOM VIEW)

COMPLIANT TO JEDEC STANDARDS MO-220-VKKD-2

http://www.BDTIC.com/ADI

OUTLINE DIMENSIONS

Figure 6. 48-Lead, Frame Chip Scale Package [LFCSP_VQ]

7 mm x 7 mm Body, Very Thin Quad (CP-48-1)

Dimensions shown in millimeters

ORDERING GUIDE

Model Temperature Range Package Description Package Option

AD1984BJCPZ
AD1984BJCPZ-RL

1

Z = RoHS Compliant Part.

1

1

0°C to 70°C 48-Lead LFCSP_VQ CP-48-1
0°C to 70°C 48-Lead LFCSP_VQ, 13” Tape and Reel CP-48-1

Rev. 0 | Page 18 of 20 | February 2008