參數(shù)資料
型號: ADSP-21990BSTZ
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號處理
英文描述: High-Performance Mixed-Signal DSP, 160 MHz, 4K Words Program Memory RAM; Package: LQFP 1.4 MM; No of Pins: 176; Temperature Range: Ind
中文描述: 16-BIT, 160 MHz, OTHER DSP, PQFP176
封裝: ROHS COMPLIANT, MS-026BGA, LQFP-176
文件頁數(shù): 16/50頁
文件大?。?/td> 2503K
代理商: ADSP-21990BSTZ
ADSP-21990
Rev. A
|
Page 23 of 50
|
August 2007
PERIPHERALS ELECTRICAL CHARACTERISTICS—ADSP-21990BST
Parameter
Description
Min
Typ
Max
Unit
ANALOG-TO-DIGITAL CONVERTER
SNR
Signal-to-Noise Ratio
1
1 In all cases, the input frequency to the ADC system is assumed to be <100 kHz.
68
72
dB
SNRD
Signal-to-Noise and Distortion
68
71
dB
THD
Total Harmonic Distortion
–80
–68
dB
CTLK
Channel-Channel Crosstalk
–78
–66
dB
CMRR
Common-Mode Rejection Ratio1
–74
–66
dB
PSRR
Power Supply Rejection Ratio1
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 Error1
1.25
2.5
%FSR
Gain Error1
0.5
1.5
%FSR
Input Voltage
VIN
Input Voltage Span
2.0
V
CIN
Input Capacitance
2
2 Analog input pins VIN0 to VIN7.
10
pF
Conversion Time
FCLK
ADC Clock Rate
20
MHz
tCONV
Total Conversion Time All 8 Channels
725
ns
VOLTAGE REFERENCE
Internal Voltage Reference3
3 These specifications are for operation of the internal voltage reference so that SENSE = REFCOM, with the default 1.0 V operating mode.
0.94
0.98
1.02
V
Output Voltage Tolerance
40
mV
Output Current
100
μA
Load Regulation
4
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.
–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
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