參數(shù)資料
型號(hào): ADSP-21992BSTZ
廠商: Analog Devices Inc
文件頁數(shù): 20/60頁
文件大?。?/td> 0K
描述: IC DSP CONTROLLER 16BIT 176LQFP
標(biāo)準(zhǔn)包裝: 1
系列: ADSP-21xx
類型: 定點(diǎn)
接口: SPI,SSP
時(shí)鐘速率: 160MHz
非易失內(nèi)存: 外部
芯片上RAM: 128kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 2.50V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 176-LQFP
供應(yīng)商設(shè)備封裝: 176-LQFP(24x24)
包裝: 托盤
ADSP-21992
Rev. A
|
Page 27 of 60
|
August 2007
Table 14. Peripherals Electrical Characteristics—ADSP-21992BST
Parameter
Description
Min
Typ
Max
Unit
ANALOG-TO-DIGITAL CONVERTER
AC Specifications
SNR
Signal-to-Noise Ratio1
68
72
dB
SNRD
Signal-to-Noise and Distortion1
68
71
dB
THD
Total Harmonic Distortion1
–78
–68
dB
CTLK
Channel-Channel Crosstalk1
–80
–66
dB
CMRR
Common-Mode Rejection Ratio1
–74
–66
dB
PSRR
Power Supply Rejection Ratio1
0.05
0.2
%FSR
Accuracy
INL
Integral Nonlinearity1
±0.6
±2.0
LSB
DNL
Differential Nonlinearity1
±0.5
±1.25
LSB
No Missing Codes
12
Bits
Zero Error1
1.25
2.5
%FSR
Gain Error1
0.5
1.5
%FSR
Input Voltage
VIN
Input Voltage Span
2.0
V
CIN
Input Capacitance2
10
pF
Conversion Time
FCLK
ADC Clock Rate
20
MHz
tCONV
Total Conversion Time All 8 Channels
725
ns
VOLTAGE REFERENCE
Internal Voltage Reference3
0.94
0.98
1.02
V
Output Voltage Tolerance
40
mV
Output Current
100
μA
Load Regulation4
–2
+0.5
+2
mV
Power Supply Rejection Ratio
–2
+0.5
+2
mV
Reference Input Resistance
8
k
Ω
POWER-ON RESET
VRST
Reset Threshold Voltage
1.4
2.1
V
VHYST
Hysteresis Voltage
50
mV
1 In all cases, the input frequency to the ADC system is assumed to be <100 kHz.
2 Analog input pins VIN0 to VIN7.
3 These specifications are for operation of the internal voltage reference so that SENSE = REFCOM, with the default 1.0 V operating mode.
4 Operation with full 0.1 mA load current. For optimal operation, it is recommended to buffer the VREF output voltage before using it in other parts of the system.
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