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参数资料
| 型号： | AD7942 |
| 厂商： | Analog Devices, Inc. |
| 元件分类： | ADC |
| 英文描述： | 14-Bit, 250 kSPS PulSAR ADC in MSOP/QFN |
| 中文描述： | 14位，250 kSPS的PulSAR系列ADC的，采用MSOP / QFN封装 |
| 文件页数： | 22/28页 |
| 文件大小： | 633K |
| 代理商： | AD7942 |
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Preliminary Technical Data
AD7942
Rev Pr B | Page 3 of 28
SPECIFICATIONS
VDD = 2.3 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
See the Analog Input section.
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
±TBD
LSB
Gain Error Temperature Drift
±TBD
ppm/°C
±TBD
mV
Offset Temperature Drift
±TBD
ppm/°C
Power Supply Sensitivity
VDD = 5V
± 5%
±TBD
LSB
THROUGHPUT
Conversion Rate
VDD = 4.5 V to 5.5 V
0
250
kSPS
VDD = 2.3 V to 4.5 V
0
200
kSPS
Transient Response
Full-Scale Step
1.8
s
AC ACCURACY
Signal-to-Noise
fIN = 20 kHz, VREF = 5 V
83
85
dB3
fIN = 20 kHz, VREF = 2.5 V
84
dB
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
fIN = 20 kHz, VREF = 2.5 V
84
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
section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
Terminology
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.
相关PDF资料 |
PDF描述 |
|---|---|
| AD7943BN | +3.3 V/+5 V Multiplying 12-Bit DACs |
| AD7943BR | +3.3 V/+5 V Multiplying 12-Bit DACs |
| AD7943BRS | +3.3 V/+5 V Multiplying 12-Bit DACs |
| AD7945BN | +3.3 V/+5 V Multiplying 12-Bit DACs |
| AD7945BR | +3.3 V/+5 V Multiplying 12-Bit DACs |
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