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參數(shù)資料
型號(hào): ADSP-21991BSTZ
廠(chǎng)商: Analog Devices Inc
文件頁(yè)數(shù): 13/44頁(yè)
文件大?。?/td> 0K
描述: IC DSP CONTROLLER 16BIT 176-LQFP
產(chǎn)品變化通告: Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝: 1
系列: ADSP-21xx
類(lèi)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: 112kB
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(lèi)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(pán)
ADSP-21991
–20–
REV. 0
PERIPHERALS ELECTRICAL CHARACTERISTICS—ADSP-21991BBC
Parameter
Min
Typ
Max
Unit
ANALOG-TO-DIGITAL CONVERTER
AC Specifications
SNR
Signal-to-Noise Ratio
1
68
72
dB
SNRD
Signal-to-Noise and Distortion
66
71
dB
THD
Total Harmonic Distortion
–80
–66
dB
CTLK
Channel-Channel Crosstalk
–80
–66
dB
CMRR
Common-Mode Rejection Ratio
–82
–66
dB
PSRR
Power Supply Rejection Ratio
0.05
0.2
%FSR
Accuracy
INL
Integral Nonlinearity
±0.6
±2.0
LSB
DNL
Differential Nonlinearity
±0.5
±1.25
LSB
No missing Codes
12
Bits
Zero Error
1.25
2.5
%FSR
Gain Error
0.5
1.5
%FSR
Input Voltage
VIN
Input Voltage Span
2.0
V
CIN
Input Capacitance
2
10
pF
Conversion Time
FCLK
ADC Clock Rate
18.75
MHz
tCONV
Total Conversion Time All 8 Channels
773
ns
VOLTAGE REFERENCE
Internal Voltage Reference
3
0.94
0.98
1.02
V
Output Voltage Tolerance
40
mV
Output Current
100
A
Load Regulation
4
–2
+0.5
+2
mV
Power Supply Rejection Ratio
–2
+0.5
+2
mV
Reference Input Resistance
8
k
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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