AD1984A [CONEXANT]
2 stereo headphone amplifiers; 2个立体声耳机放大器
| 型号： | AD1984A |
| 厂家： | 
CONEXANT SYSTEMS, INC |
| 描述： | 2 stereo headphone amplifiers |
| 文件： | 总2页 (文件大小：674K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AD1984A SoundMAX HD Audio Codec With 4 DACs,
4 ADCs, SPDIF Out
Overview
Features
The AD1984A audio codec and software provide superior high definition audio quality
and performance. The AD1984A has two 192 kHz DAC pairs, two 192 kHz ADC pairs, an
S/PDIF output, a 2-channel digital microphone interface, and 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.
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ꢀ
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2 stereo headphone amplifiers
Line outputs and inputs
Analog microphone inputs
Retaskable ports
192 kHz DACs/ADCs
–
–
–
–
2 independent stereo DAC/ADC
pairs
Simultaneous record of 2 stereo
channels
Block Diagram
Simultaneous playback of 2 stereo
channels
All independent sample rates, 8
kHz through 192 kHz
16-, 20-, and 24-bit resolution
Selectable stereo mixer on
outputs
–
–
S/PDIF IN
S/PDIF Rx
S/PDIF Tx
Digital and
Analog
PCBeep
S/PDIF OUT 2 (HDMI)
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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
All sample rates, 8 kHz through
192 kHz
16-, 20-, and 24-bit resolution
Digital PCM gain control
S/PDIF OUT 1
S/PDIF Tx
DAC3
DAC2
Port F
Port G
Σ
Σ
Σ
–
–
DAC1
DAC0
Port D
–
–
HD
MONO OUT
Σ
Σ
Σ
Σ
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S/PDIF Output
Audio
–
–
–
Supports 44.1 Hz through 192 kHz
Interface
Port E
Port A
sample rates
GPIO
16-, 20-, and 24-bit data; PCM and
AC3 formats
and
EAPD
Digital PCM gain control
Port B
Port C
ꢁ
Auxiliary Pins
Impedance and presence detection on
all jacks
Σ
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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
1.5 V or 3.3 V HD Audio link signaling
voltage
Advanced power management modes
Security feature prevents
unauthorized recording
48-lead, RoHS compliant QFN
package
ADC2
ADC1
ADC0
DM_DATA
DM_CLK
Digital
Microphone
Σ
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Software
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Voice input enhancements
Output enhancements
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Part Number AD1984A
Applications
Description SoundMAX HD Audio
Codec
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Embedded Audio
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Point Of Sale Systems
Table 1. Performance Characteristics
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 fS A-Weighted)
Signal-to-Noise Ratio
–86
101
101
dB
dB
dB
Headphone Drive (32 Ω loads—DAC to Pin)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to fS A-Weighted)
Signal-to-Noise Ratio
–84
101
101
dB
dB
dB
Input Ports (Mic Boost = 0 dB)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to fS A-Weighted)
Signal-to-Noise Ratio
–80
92
92
dB
dB
dB
Table 2. Specifications
Parameter
Min
Typ
Max
Unit
Analog-to-Digital Converters
Resolution
24
Bits
%
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
ADC Offset Error
±10
±0.2
±0.5
±5
dB
mV
ADC Crosstalk
Line Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L)
Line Inputs to Other
–94
dB
dB
–100
–80
Digital-to-Analog Converters
Resolution
24
Bits
%
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
DAC Crosstalk (Input L, Zero R, Measure R_OUT; Input R, Zero L, Measure L_OUT)
Analog Mixer
±10
±0.5
dB
dB
–104
Signal-to-Noise Reduction (SNR) Input to Output
Step Size: All Mixer Inputs
95
dB
dB
dB
1.5
Input Gain/Attenuation Range: All Mixer Inputs
–34.5
+12.0
Ordering Information
Operating
Temperature
Device Set Order ID
Package Type
Package
AD1984AJCPZ*
QFN
48-Lead QFN, 7x7 mm
0°C to 70°C
*Lead-free (Pb Free) and RoHS compliant
www.conexant.com
General Information:
U.S. and Canada: (888) 855-4562
International: 1+ (949) 483-3000
Headquarters
© 2012 Conexant Systems, Inc. All Rights Reserved. Conexant and the
Conexant logo are registered trademarks of Conexant Systems, Inc. All other
trademarks are owned by their respective owners. Although Conexant strives
for accuracy in all its publications, this material may contain errors or
omissions and is subject to change without notice. THIS MATERIAL IS
PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING MERCHANT ABILITY, FITNESS FOR A
PAPARTICULAR PURPOSE AND NON-INFRINGEMENT. Conexant shall
4000 MacArthur Blvd.
Newport Beach, CA 92660
not be liable for any special, indirect, incidental or consequential damages as Doc# PBR-203106
a result of its use.
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