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WM2148CFT/V 数据表(PDF) 5 Page - Wolfson Microelectronics plc

部件名 WM2148CFT/V
功能描述  14-bit 8MSPS Analogue-To-Digital Converter
PDF  14 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM2148CFT/V 数据表(HTML) 5 Page - Wolfson Microelectronics plc

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Production Data
WM2148
WOLFSON MICROELECTRONICS LTD
PD Rev 1.1 February 2001
5
ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended temperature range, AVDD = DVDD = 3.3V (unless otherwise noted)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Power Supplies
Analogue Supply Current
AIDD
AVDD = 3.6V
81
90
mA
Digital Supply Current
DIDD
DVDD = 3.6V
5
10
mA
Power Consumption
P
AVDD = DVDD = 3.6V
270
360
mW
Power Down Supply Current
(sum of all supply currents)
IPD =
AIDD+DIDD
Power down mode
CLK signal stopped
20
µA
DC Characteristics
Resolution
14
bits
Differential Nonlinearity
DNL
± 0.6
± 1
bits
Integral Nonlinearity
INL
Best Fit
± 3
± 5
bits
Offset Error
IN+ = IN-, 0dB gain
0.3
% of FSR
Gain Error
0 dB gain
1
% of FSR
AC Characteristics
Analogue Input Bandwidth
140
MHz
FIN = 100kHz
-81
FIN = 1MHz
-78
Total Harmonic Distortion
THD
FIN = 4MHz
-77
dB
FIN = 1MHz
70
72
Signal to Noise Ratio
SNR
FIN = 4MHz
71
dB
FIN = 1MHz
69
70
Signal to Noise plus Distortion
SINAD
FIN = 4MHz
70
dB
FIN = 1MHz
73
80
Spurious Free Dynamic Range
SFDR
FIN = 4MHz
80
dB
Effective Number of Bits
ENOB
11.2
11.5
bits
Reference Voltage
Bandgap Voltage
VBG
Internal reference
1.425
1.5
1.575
V
Temperature Coefficient
40
ppm / °C
Supply Voltage Coefficient
200
ppm / V
VBG Input Impedance
External reference
40
k
Ω
Positive Reference Voltage
VREF+
VREF+ = VBG (1 +
2/
3)
2.5
V
Negative Reference Voltage
VREFí
VREF+ = VBG (1 -
2/
3)
0.5
V
Reference Voltage Difference
¨9REF
¨9REF = VREF+ -
VREFí
2.0
V
Analog Inputs
Positive Analogue Input Voltage
VIN+
0AVDD
V
Negative Analogue Input Voltage
VINí
0AVDD
V
Input Voltage Difference
¨9IN
¨9IN = VIN+ - VINí
-
¨9REF
¨9REF
V
Input impedance
ZIN
25
k
Ω
PGA Range
07
dB
PGA Step Size
1dB
PGA Gain Error
± 0.25
dB
Digital Inputs
Input LOW level
VIL
0.8
V
Input HIGH level
VIH
2V
Input current
IIN
± 1
µA
Input capacitance
CIN
5pF



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