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PDF AD1986A Data sheet ( Hoja de datos )
| Número de pieza | AD1986A | |
| Descripción | HD Audio SoundMAX Codec | |
| Fabricantes | Analog Devices | |
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FEATURES
Supports both AC ’97 and HD audio interfaces
6 DAC channels for 5.1 surround
S/PDIF output
Integrated headphone amplifiers
Variable rate audio
Double rate audio (Fs = 96 kHz)
Greater than 90 dB dynamic range
20-bit resolution on all DACs
20-bit resolution on all ADCs
Line-level mono phone input
High quality differential CD input
Selectable MIC input with preamp
AUX and line-in stereo inputs
External amplifier power down (EAPD)
Power management modes
Jack sensing and device identification
48-lead LQFP package
AC ’97 and HD Audio
SoundMAX Codec
AD1986A
ENHANCED FEATURES
Integrated parametric speaker equalizer
Stereo microphone with up to 30 dB gain boost
Integrated PLL for system clocking
Variable sample rate: 7 kHz to 96 kHz
7 kHz to 48 kHz in 1 Hz increments
96 kHz for double rate audio
Jack sense with autotopology switching
Jack presence detection on up to 8 jacks
Three software-controlled microphone bias signals
Software-enabled outputs for jack sharing
Auto-down mix and channel spreading
Microphone-to-mono output for speakerphone
Stereo microphone pass-through to mixer
Built-in microphone/center/LFE/line-in sharing
Built-in SURROUND/LINE_IN sharing
Center/LFE swapping supporting all vendor speakers
Microphone left/right swapping
Reduced support component count
General-purpose digital output pin (GPO)
LINE_OUT and HP_OUT, headphone drive on both
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.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.
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SPECIFICATIONS
Test conditions, unless otherwise noted.
Table 1.
Parameter
Temperature
Digital Supply (DVDD)
Analog Supply (AVDD)
Sample Rate (FS)
Input Signal
Analog Output Pass Band
VIH
VIL
VIH
VIL
DAC Test Conditions
Calibrated
Output −3 dB Relative to Full Scale
10 kΩ Output Load: Line (Surround), Mono
32 Ω Output Load: Headphone
2 kΩ Output Load: Center, LFE
AD1986A
Typ
25
3.3 ± 10%
5.0 ± 10%
48
1.0
20 Hz–20 kHz
2.0
0.8
2.4
0.6
ADC Test Conditions
Calibrated
0 dB PGA Gain
Input −3.0 dB Relative to Full Scale
Unit
°C
V
V
kHz
kHz
V
V
V
V
Table 2. Analog Input
Input Voltage
MIC_1/2, LINE_IN, CD, AUX, PHONE_IN (No Preamp)
C/LFE and SURROUND (When Used as Inputs)
MIC_1/2, LINE_IN, C/LFE With 30 dB Preamp
MIC_1/2, LINE_IN, C/LFE With 20 dB Preamp
MIC_1/2, LINE_IN, C/LFE With 10 dB Preamp
Input Impedance2
Input Capacitance2
1 RMS values assume sine wave input.
2 Guaranteed by design, not production tested.
Table 3. Master Volume
Parameter
Step Size (LINE_OUT, HP Out, Mono Out, SURROUND, CENTER, LFE)
Output Attenuation Range (0 dB to –46.5 dB)
Mute Attenuation of 0 dB Fundamental2
Table 4. Programmable Gain Amplifier—ADC
Parameter
Step Size
PGA Gain Range Span (0 dB to 22.5 dB)
Min Typ Max Unit
1 Vrms1
2.83 V p-p
0.032
Vrms
0.089
V p-p
0.1 Vrms
0.283
V p-p
0.316
Vrms
0.894
V p-p
20 kΩ
5 7.5 pF
Min Typ Max Unit
−1.5 dB
−46.5
dB
−80 dB
Min Typ
1.5
22.5
Max Unit
dB
dB
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AD1986A
Table 19. Analog Input/Output
Mnemonic
Pin
Number
Input/
Ouput
PCBEEP
12
I
PHONE_IN
13
I
AUX_L
14
I
AUX_R
15
I
CD_L
18 I
CD_GND
19
I
CD_R
20 I
MIC_1 21 I
MIC_2 22 I
LINE_IN_L
23
I
LINE_IN_R
24
I
CENTER_OUT 31
I/O
LFE_OUT
32
I/O
HEADPHONE_L 39
O
HEADPHONE_R 41
O
LINE_OUT_L
43
O
LINE_OUT_R
45
O
MONO_OUT
37
O
SURR_OUT_L 35
I/O
SURR_OUT_R 36
I/O
Description
Analog PC Beep Input. Routed to all output capable pins when RESET is asserted.
Mono Line Level Input.
Auxiliary Left Channel Input.
Auxiliary Right Channel Input.
CD-Audio-Left Channel.
CD-Audio-Analog-Ground-Reference (for Differential CD Input).
CD-Audio-Right Channel.
Microphone 1 or Line-In-Left Input (See LISEL Bits in Register 0x76).
Microphone 2 or Line-In-Right Input (See LISEL Bits in Register 0x76).
Line-In-Left Channel or Microphone 1 Input (See OMS Bits in Register 0x74).
Line-In-Right Channel or Microphone 2 Input (See OMS Bits in Register 0x74).
Center-Channel Output or Microphone 1 Input (See OMS Bits in Register 0x74).
Low-Frequency-Enhanced Output or Microphone 2 Input (See OMS Bits in Register 0x74).
Headphone-Out-Left Channel (See HPSEL Bits in Register 0x76).
Headphone-Out-Right Channel (See HPSEL Bits in Register 0x76).
Line-Out (Front)—Left Channel (See LOSEL Bit in Register 0x76) (HP Drive-Capable).
Line-Out (Front)—Right Channel (See LOSEL Bit in Register 0x76) (HP Drive-Capable).
Mono Output to Telephony Subsystem Speakerphone.
Surround-Left Channel Output or Line-In-Left Input (See LISEL and SOSEL Bits in Register 0x76).
Surround-Right Channel Output or Line-In-Right Input (See LISEL and SOSEL Bits in
Register 0x76).
Table 20. Filter/Reference
Mnemonic
Pin
Number
VREF_FILT
27
VREF_OUT (MIC)
28
VREF_OUT
(LINE_IN)
29
VREF_OUT (C/LFE) 33
Input/
Ouput
O
O
O
Description
Voltage Reference Filter.
Programmable Voltage Reference Output (Intended for MIC Bias on the MIC_1/2 Channels).
Programmable Voltage Reference Output (Intended for MIC Bias on the LINE_IN Channels).
O Programmable Voltage Reference Output (Intended for MIC Bias on the C/LFE Channels).
Table 21. Power and Ground
Input/
Mnemonic Pin Number Ouput
DVDD
1, 9
N/A
DVSS
4, 7
N/A
AVDD
25, 34, 38, 42, N/A
46
AVSS 26, 30, 40, 44 N/A
Description
Digital Supply Voltage (3.3 V).
Digital Supply Return (Ground).
Analog Supply Voltage (5.0 V). AVDD supplies should be well filtered because supply noise will
degrade performance.
Analog Supply Return (Ground).
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