參數(shù)資料
型號: ADAU1781BCPZ-RL7
廠商: Analog Devices Inc
文件頁數(shù): 34/92頁
文件大?。?/td> 0K
描述: IC SIGMADSP CODEC LN 32LFCSP
標(biāo)準(zhǔn)包裝: 1,500
系列: SigmaDSP®
類型: 立體聲音頻
數(shù)據(jù)接口: I²C,串行,SPI?
分辨率(位): 24 b
ADC / DAC 數(shù)量: 2 / 2
三角積分調(diào)變:
S/N 比,標(biāo)準(zhǔn) ADC / DAC (db): 100 / 105(差分),100 / 103(單端)
動態(tài)范圍,標(biāo)準(zhǔn) ADC / DAC (db): 99.2 / 105(差分),99.2 / 103(單端)
電壓 - 電源,模擬: 1.8 V ~ 3.65 V
電壓 - 電源,數(shù)字: 1.63 V ~ 3.65 V
工作溫度: -25°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-VQ
包裝: 帶卷 (TR)
ADAU1781
Rev. B | Page 4 of 92
SPECIFICATIONS
Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase deviation specifications.
Supply voltages AVDD = AVDD1 = AVDD2 = I/O supply = 3.3 V, digital supply = 1.5 V, unless otherwise noted; temperature = 25°C;
master clock (MCLK) = 12.288 MHz (fS = 48 kHz, 256 × fS mode); input sample rate = 48 kHz; measurement bandwidth = 20 Hz to 20 kHz;
word width = 24 bits; load capacitance (digital output) = 20 pF; load current (digital output) = 2 mA; high level input voltage = 0.7 × IOVDD;
and low level input voltage = 0.3 × IOVDD. All power management registers are set to their default states.
RECORD SIDE PERFORMANCE SPECIFICATIONS
Specifications guaranteed at 25°C (ambient).
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
ANALOG-TO-DIGITAL CONVERTERS
ADC Resolution
All ADCs
24
Bits
Digital Attenuation Step
0.375
dB
Digital Attenuation Range
95
dB
INPUT RESISTANCE
Noninverting Inputs PGA
(LMICP, RMICP)
All gain settings
500
k
Inverting Inputs PGA (LMICN, RMICN)
0 dB gain
62
k
6 dB gain
32
k
10 dB gain
22
k
14 dB gain
14
k
17 dB gain
10
k
20 dB gain
8
k
26 dB gain
5
k
32 dB gain
4
k
Beep Input PGA
0 dB
20
k
6 dB
9
k
10 dB
6
k
14 dB
3.5
k
23 dB
50
k
20 dB
2
k
26 dB
2
k
32 dB
2
k
SINGLE-ENDED MICROPHONE INPUT
TO ADC PATH
Full-Scale Input Voltage (0 dB)
Scales linearly with AVDD
AVDD/3.3
V rms
AVDD = 1.8 V
0.55 (1.56)
V rms (V p-p)
AVDD = 3.3 V
1.0 (2.83)
V rms (V p-p)
Dynamic Range
60 dB input
With A-Weighted Filter (RMS)
AVDD = 1.8 V
96
dB
AVDD = 3.3 V
94
99.2
dB
No Filter (RMS)
AVDD = 1.8 V
92
dB
AVDD = 3.3 V
92
96.5
dB
Total Harmonic Distortion + Noise
3 dBFS
AVDD = 1.8 V
88
dB
AVDD = 3.3 V
90
dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
AVDD = 1.8 V
96
dB
AVDD = 3.3 V
100
dB
No Filter (RMS)
AVDD = 1.8 V
92
dB
AVDD = 3.3 V
97
dB
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