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PDF AK4373 Data sheet ( Hoja de datos )
| Número de pieza | AK4373 | |
| Descripción | Low Power Stereo DAC | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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[AK4373]
AK4373
Low Power Stereo DAC with HP/SPK-Amp
GENERAL DESCRIPTION
The AK4373 is a low power stereo 24bit DAC with an integrated stereo headphone amplifier and a
monaural speaker driver. It can be used for a variety of portable audio and media player applications,
including game consoles, dedicated headphone drivers, personal navigation devices, and portable media
players. The output drivers can be configured for three unique use cases: mono speaker driver or
single-ended ac-coupled headphones which can be used as stereo line-out, DC-coupled BTL
headphones and Pseudo Cap-less. The AK4373 operates off of a low-voltage power supply, ranging from
2.2V to 3.6V. The output amplifiers operate at up to 4.0V of the headphone power supply. The device is
packaged in a space-saving 32-pin QFN package.
FEATURES
Sampling Rate: 8 kHz ∼ 48 kHz
8-times Over sampling Digital Filter
SCF with high tolerance to clock jitter
Stereo Headphone Amplifier
65mW output (Single-ended mode) into 16Ω 3.3V
SNR: 96dB
130mW output (Differential mode) into 32Ω 3.3V
SNR: 96dB
60mW output (Pseudo cap-less mode) into 16Ω 3.3V
SNR: 86dB
Pop-noise free at power-up and reset
Stereo Lineout
SNR: 96dB
Mono Speaker Driver
Available for both Dynamic and Piezo Speaker
0.8W @ 8Ω HVDD = 4.0V
1.0W @ 4Ω HVDD = 4.0V
SNR: 97dB
Digital Processing
HPF, LPF, 3D Enhance, Frequency Compensation, 5-BiQuads,
Digital ALC/Limiter: +36dB to -54dB, 0.375dB/step
Digital Volume Control: +12dB to -115dB, 0.5dB/step, Mute
Analog Mixing: Mono input
PLL: Input Frequency: 27MHz, 25MHz, 24MHz, 13.5MHz, 12.288MHz,
12MHz, and 11.2896MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
Input Level: CMOS or AC coupling Input
Master Clock (MCKI pin): 256/512/1024fs
Master Clock Output (MCKO pin): 32fs, 64fs, 128fs, 256fs
µP Interface: 3-Wire serial, I2C bus (version1.0, 400 KHz Fast-mode)
Audio Interface Format: MSB First, 2’s complement
16/20/24bit MSB justified, 16/20/24bit LSB justified,
16/20/24bit I2S, 16/20/24bit DSP Mode
CMOS Input Level
MS0991-E-00
-1-
2008/09
1 page  
■ Comparison table between AK4343 and AK4373
1. Function
Function
DAC Resolution
HP-Amp S/N
HP-Amp Output Type
Five Programmable Biquads
Line Output Pins
MCKI Input Level
Analog Mixing
Receiver Amp
SPK AMP
AK4343
16bit
90dB
Single-ended
No
Independent from HP/SPK
CMOS
3-Stereo
Yes
1.2W@8Ω, 5V
2. Pin
Pin#
1
3
5
12
16
19
20
22
23
24
28
29
30
31
32
AK4343
TEST1
AVSS
VCOC / RIN3
TEST2
DVSS
SPN
SPP
HVSS
HPR
HPL
MIN / LIN3
RIN2 / IN2−
LIN2 / IN2+
LIN1 / IN1−
RIN1 / IN1+
[AK4373]
AK4373
24bit
96dB(single), 96dB(BTL)
Single-ended, Differential
or Pseudo cap-less
Yes
Shared with HPL/HPR
CMOS or 0.4Vpp AC coupling
1-Mono (Single/Differential)
No
1.0W@4Ω, 4.0V
AK4373
NC
VSS1
VCOC
NC
VSS3
SPN / HPR− / HVCM
SPP / HPR+ / TEST
VSS2
HPR / HPL−
HPL / HPL+
MIN+
MIN-
NC
NC
NC
MS0991-E-00
-5-
2008/09
5 Page 
[AK4373]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=HVDD=3.3V; VSS1=VSS2=VSS3=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 24bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min typ
max Units
DAC Characteristics:
Resolution
- - 24 Bits
Stereo Line Output Characteristics: DAC → LOUT/ROUT pins, Single-ended mode (Figure 4), HPBTL bit = “0”,
PSEUDO bit = “0”, HPG bit = “0”, HVDD=3.3V, C=1µF, RL=10kΩ, ALC=OFF,
AVOL=0dB, DVOL=0dB; unless otherwise specified.
Output Voltage (0dBFS) (Note 11)
1.78 1.98
2.18 Vpp
S/(N+D) (0dBFS)
- 77
- dB
S/N (A-weighted)
86 96
- dB
Interchannel Isolation
60 80
- dB
Load Resistance
Load Capacitance
RL
C1
10 -
--
- kΩ
30 pF
Note 11. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ).
Line-Amp
LOUT/ROUT
pin
C1
Measurement
C Point
RL
Figure 4. Line-Amp output circuit
Parameter
min typ
max Units
Headphone-Amp Characteristics: DAC → HPL/HPR pins, Single-ended mode (Figure 5), HPBTL bit = “0”,
PSEUDO bit = “0”, HPG bit = “0”, HVDD=3.3V, C=47µF, RL=22.8Ω, ALC=OFF,
AVOL=0dB, DVOL=0dB; unless otherwise specified.
Output Voltage (Note 12)
0dBFS
1.58 1.98
2.38 Vpp
0dBFS (Note 13)
-
3.00
- Vpp
0dBFS (Note 14)
-
1.02
- Vrms
S/(N+D)
−3dBFS
50 60
- dB
−3dBFS (Note 13)
-
65
- dB
0dBFS (Note 14)
-
20
- dB
S/N (A-weighted)
(Note 13)
86 96
- 96
- dB
- dB
Interchannel Isolation
60 75
- dB
Interchannel Gain Mismatch
- 0 0.8 dB
Load Resistance
Load Capacitance
RL=R1+R2
C1
16 -
--
-Ω
30 pF
C2 - - 300 pF
Note 12. Output voltage is proportional to AVDD voltage.
Vout = 0.6 x AVDD(typ)@HPG bit = “0”, 0.91 x AVDD(typ)@HPG bit = “1”.
Note 13. HPG bit = “1”, HVDD=3.8V, C=47µF, RL=100Ω.
Note 14. HPG bit = “1”, HVDD=3.3V, C=47µF, RL=16Ω.
MS0991-E-00
- 11 -
2008/09
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4373.PDF ] | |
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