參數(shù)資料
型號(hào)： AD7946BRMRL7
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： 14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
中文描述： 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10
封裝： MO-187-BA, MSOP-10
文件頁(yè)數(shù)： 21/27頁(yè)
文件大?。?/td> 301K
代理商： AD7946BRMRL7
Preliminary Technical Data
AD7946
Rev Pr D | Page 3 of 27
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
Conditions
Min
Typ
Max
Unit
RESOLUTION
14
Bits
ANALOG INPUT
Voltage Range
IN+ IN
0
VREF
V
Absolute Input Voltage
IN+
0.1
VDD + 0.1
V
IN
0.1
V
Analog Input CMRR
fIN = 250 kHz
65
dB
Leakage Current at 25°C
Acquisition Phase
1
nA
Input Impedance
ACCURACY
No Missing Codes
14
Bits
Differential Linearity Error
0.7
±0.25
+0.7
LSB1
Integral Linearity Error
1
±0.4
+1
LSB
Transition Noise
REF = VDD = 5 V
0.33
LSB
Gain Error2, TMIN to TMAX
±TBD
LSB
Gain Error Temperature Drift
±TBD
ppm/°C
Offset Error2, TMIN to TMAX
±TBD
mV
Offset Temperature Drift
±TBD
ppm/°C
Power Supply Sensitivity
VDD = 5V
± 5%
±TBD
LSB
THROUGHPUT
Conversion Rate
0
500
kSPS
Transient Response
Full-Scale Step
400
ns
AC ACCURACY
Signal-to-Noise
fIN = 20 kHz, VREF = 5 V
83
85
dB3
Spurious-Free Dynamic Range
fIN = 20 kHz
100
dB
Total Harmonic Distortion
fIN = 20 kHz
100
dB
Signal-to-(Noise + Distortion)
fIN = 20 kHz, VREF = 5 V
83
85
dB
fIN = 20 kHz, VREF = 5 V, 60 dB
Input
25
dB
Intermodulation Distortion4
TBD
dB
1 LSB means least significant bit. With the 5 V input range, one LSB is 305.2 V.
2 See Terminology section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
3All specifications in dB are referred to a full-scale input FS. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
4 fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at 7 dB below full-scale.
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