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PDF AD1884 Data sheet ( Hoja de datos )
| Número de pieza | AD1884 | |
| Descripción | High Definition Audio SoundMAX Codec | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD1884 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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a
FEATURES
FOUR 192 kHz DACs/ADCs
Two independent stereo DAC/ADC pairs
Simultaneous record of two stereo channels
Simultaneous playback of two stereo channels
Independent 8, 11.025, 16, 22.05, 32, 44.1,
48, 88.2, 96, 176.4, and 192 kHz sample rates
16, 20, and 24-bit resolution
Selectable stereo mixer on outputs
S/PDIF OUTPUT
Supports 44.1, 48, 88.2, 96, 176.4, and 192 kHz sample rates
16, 20, and 24-bit data; PCM, and AC3 formats
Digital PCM gain control
DEDICATED AUXILIARY PINS
Stereo CD/auxiliary I/O port w/GND sense
Stereo auxiliary/dock I/O port
Mono out pin for internal speakers or telephony
High Definition Audio
SoundMAX® Codec
AD1884
ENHANCED FEATURES
Two stereo headphone amplifiers
Microsoft Vista premium logo for notebook
90 dB audio outputs, 85 dB audio inputs
Internal 32-bit arithmetic for greater accuracy
Impedance and presence detection on all jacks
Three independent microphone bias pins
Digital and analog PCBeep
Three general-purpose digital I/O (GPIO) pins
3.3 V analog and digital supply voltages
Advanced power management modes
48-lead, Pb-free LFCSP_VQ package
H DAC1
D
DAC0
A
U
D
I S/PDIF OUT
O
I
N
T DIGITAL
E PCBEEP
R
F
A
C ADC0
E
ADC1
� HP
� HP
�
�
�
�
Figure 1. Functional Block Diagram
AD1884
PORT A
PORT D
MONO OUT
PORT E
PORT F
PCBEEP
PORT C
PORT B
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2007 Analog Devices, Inc. All rights reserved.
1 page  
Parameter
DIGITAL TO ANALOG CONVERTERS
Resolution
Gain Error1 (Full Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
Total Audible Out-of-Band Energy1 (Measured from 0.6 × fS to 20 kHz)
DAC Crosstalk1 (Input L, Zero R, Measure R_OUT; Input R, Zero L, Measure L_OUT)
DAC VOLUMES
Step Size (DAC-0, DAC-1)
Output Gain/Attenuation Range
Mute Attenuation of 0 dB Fundamental1
ADC VOLUMES
Step Size (ADCSEL-0, ADCSEL-1)
PGA Gain/Attenuation Range
ANALOG MIXER
Signal-to-Noise Ratio Input to Output – Ports B, C, or F, to Port D Output
Step Size: All Mixer Inputs
Input Gain/Attenuation Range: All Mixer Inputs
ANALOG LINE LEVEL OUTPUTS
Full-Scale Output Voltage: Line Out Drive Enabled
Ports A, D, E, F, and Mono Out
Output Impedance1
External Load Impedance1
Output Capacitance1
External Load Capacitance
ANALOG HP DRIVE OUTPUTS
Full-Scale Output Voltage: Line Out Drive Enabled
Ports A and D (when HP Drive is Enabled)
Output Impedance1
External Load Impedance1
Output Capacitance1
External Load Capacitance1
ANALOG INPUTS
Input Voltages—Port B, C, or E
Mic Boost = 0 dB
Min
–58.5
–58.5
–34.5
1.0
2.83
10
1.0
2.83
32
Input Voltages—Microphone Boost Amplifier, Ports B, C, or E
Mic Boost = +10 dB
Mic Boost = +20 dB
Mic Boost = +30 dB
Input Impedance
PCBEEP
Ports B, C, E (Mic Boost = 0 dB)
Port F
Input Capacitance1
Typ
24
–85
–95
1.5
–80
1.5
90
–1.5
190
15
15
1
2.83
0.316
0.894
0.1
0.283
0.032
0.089
23
150
45
5
AD1884
Max
±10
±0.5
0
+22.5
+12.0
1000
0.5
1000
Unit
Bits
%
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
V rms3
V p-p
Ω
kΩ
pF
pF
V rms
V p-p
Ω
Ω
pF
pF
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
kΩ
kΩ
kΩ
7.5 pF
Rev. 0 | Page 5 of 16 | January 2007
5 Page 
AD1884
Table 3. AD1884 Pin Descriptions (Continued)
Mnemonic
Pin No. I/O Description
AVDD 3.3 V
25, 38
I
CAUTION: DO NOT APPLY 5 V TO THESE PINS!
Analog Supply Voltage 3.3 V ONLY.
MIC_BIAS_IN
Note: AVDD supplies should be well regulated and filtered as supply noise degrades
audio performance.
33 I Source Power for Microphone Bias Boost Circuitry.
5.0 V or 3.3 V
Connect this pin to 5.0 V via a low-pass filter. When connected this way the AD1884 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 (AVDD) via a low-pass filter.
The AD1884 produces a mic bias voltage relative to the AVDD supply
(typically 3.0 V @ AVDD = 3.3 V).
AVSS
26, 42
I
Analog Supply Return (Ground). AVSS should be connected to DVSS using a
conductive trace under, or close to, the AD1884.
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.
Rev. 0 | Page 11 of 16 | January 2007
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD1884.PDF ] | |
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