The AD1984A audio CODEC provides superior HD audio quality and performance. The AD1984A has:
• Two 192kHz DAC pairs
• Two 192kHz ADC pairs
• S/PDIF output
• Two-channel digital microphone interface
• Digital and analog PCBeep
These features make the AD1984A the right choice for embedded systems where performance is key. The
AD1984A is available in a 48-lead, RoHS compliant lead frame chip scale package in both reels and trays.
• Supports 44.1Hz through 192kHz sample rates
• 16-bit, 20-bit, and 24-bit data; PCM and AC3 formats
• Digital PCM gain control—Auxiliary pins
• Impedance and presence detection on all jacks
• Full analog mixer with DAC inputs
• Three independent micbias pins
• Digital and analog PCBeep
• Three GPIO pins
• 3.3V analog supply voltage
• 1.7V to 1.9V or 3.3V digital supply voltages
• 1.5V or 3.3V HD audio link signaling voltage
• Advanced power management modes
• Security feature prevents unauthorized recording
• 48-lead, RoHS-compliant QFN package
• Two stereo headphone amplifiers
• Line outputs and inputs
• Analog microphone inputs
• Re-taskable ports
• 192kHz DACs/ADCs
– Two independent stereo DAC/ADC pairs
– Simultaneous record of two stereo channels
– Simultaneous playback of two stereo channels
– All independent sample rates, 8kHz through 192kHz
– 16-bit, 20-bit, and 24-bit resolution
– Selectable stereo mixer on outputs
• Stereo digital microphone interface
– Two 192kHz digital microphone channels
– Supports one or two microphones per pin
– Selectable bit clock rates of 1.5MHz, 2MHz, and
3MHz
– Mono and stereo array support
– All sample rates, 8kHz through 192kHz
– 16-bit, 20-bit, and 24-bit resolution
– Digital PCM gain control
• S/PDIF output
• Embedded audio
• POS systems
HD
Audio
Interface
S/PDIF Rx
S/PDIF Tx
S/PDIF Tx
GPIO and
EAPD
DAC3
DAC2
DAC1
DAC0
ADC2
ADC1
ADC0
S/PDIF IN
S/PDIF OUT 2 (HDMI)
S/PDIF OUT 1
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Digital and
Analog
PCBeep
Port F
Port G
Port D
MONO OUT
Port E
Port A
Port B
Port C
Digital
Microphone
DM_DATA
DM_CLK
Conexant Confidential
• www.conexant.com
•
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AD1984A High Definition Audio CODEC | AudioSmart™ Product Brief
Parameter
ADCs
Resolution
Gain Error (Full-scale Span Relative to the Nominal Input Voltage)
Inter-channel Gain Mismatch (Difference of Gain Errors)
ADC Offset Error
ADC Crosstalk
Line Inputs (Input L, Ground R, Read R, Input R, Ground L, and Read L)
Line Inputs to Other
DACs
Resolution
Gain Error (Full-scale Span Relative to the Nominal Input Voltage)
Inter-channel Gain Mismatch (Difference of Gain Errors) -
DAC Crosstalk (Input L, Zero R, Measure R_OUT, Input R, Zero L, and Measure L_OUT) -
-
-
-
-
-
-
-
-
-
Minimum Typical Maximum Unit
-
-
-
-
24
-

0.2
–94
–100
24
–104
-
-
-
-

10

0.5

5
–80
-

10

0.5
Bits
% dB mV dB dB
Bits
% dB dB
Analog Mixer
SNR Input to Output
Step Size: All Mixer Inputs
Input Gain/Attenuation Range: All Mixer Inputs
-
-
–34.5
-
95
1.5
-
-
12 dB dB dB
Device Set Order ID
AD1984AJCPZ*
Package Type
QFN
* = Lead-free (Pb Free) and RoHS compliant
Package
48-Lead QFN, 7x7 mm
Operating Temperature
0°C to 70°C www.conexant.com
Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614
General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000
© 2014 Conexant Systems, Inc. All rights reserved.
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