参数资料
型号: EVAL-AD7949EDZ
厂商: Analog Devices Inc
文件页数: 27/32页
文件大小: 0K
描述: BOARD EVAL AD7949
标准包装: 1
系列: PulSAR®
ADC 的数量: 1
位数: 14
采样率(每秒): 250k
数据接口: 串行
输入范围: ±VREF
在以下条件下的电源(标准): 10.8mW @ 250kSPS,5V
工作温度: -40°C ~ 85°C
已用 IC / 零件: AD7949
已供物品:
AD7949
Data Sheet
Rev. D | Page 4 of 32
SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 1.8 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Conditions/Comments
Min
Typ
Max
Unit
RESOLUTION
14
Bits
ANALOG INPUT
Voltage Range
Unipolar mode
0
+VREF
V
Bipolar mode
VREF/2
+VREF/2
Absolute Input Voltage
Positive input, unipolar and bipolar modes
0.1
VREF + 0.1
V
Negative or COM input, unipolar mode
0.1
+0.1
Negative or COM input, bipolar mode
VREF/2 0.1
VREF/2
VREF/2 + 0.1
Analog Input CMRR
fIN = 250 kHz
68
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance1
THROUGHPUT
Conversion Rate
Full Bandwidth2
VDD = 4.5 V to 5.5 V
0
250
kSPS
VDD = 2.3 V to 4.5 V
0
200
kSPS
Bandwidth2
VDD = 4.5 V to 5.5 V
0
62.5
kSPS
VDD = 2.3 V to 4.5 V
0
50
kSPS
Transient Response
Full-scale step, full bandwidth
1.8
μs
Full-scale step, bandwidth
14.5
μs
ACCURACY
No Missing Codes
14
Bits
Integral Linearity Error
1
±0.5
+1
LSB3
Differential Linearity Error
1
±0.25
+1
LSB
Transition Noise
REF = VDD = 5 V
0.1
LSB
Gain Error4
5
±0.5
+5
LSB
Gain Error Match
1
±0.2
+1
LSB
Gain Error Temperature Drift
±1
ppm/°C
Offset Error4
±0.5
LSB
Offset Error Match
1
±0.2
+1
LSB
Offset Error Temperature Drift
±1
ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±0.2
LSB
AC ACCURACY5
Dynamic Range
85.6
dB6
Signal-to-Noise
fIN = 20 kHz, VREF = 5 V
84.5
85.5
dB
fIN = 20 kHz, VREF = 4.096 V internal REF
85
dB
fIN = 20 kHz, VREF = 2.5 V internal REF
84
dB
SINAD
fIN = 20 kHz, VREF = 5 V
84
85
dB
fIN = 20 kHz, VREF = 5 V, 60 dB input
33.5
dB
fIN = 20 kHz, VREF = 4.096 V internal REF
85
dB
fIN = 20 kHz, VREF = 2.5 V internal REF
84
dB
Total Harmonic Distortion
fIN = 20 kHz
100
dB
Spurious-Free Dynamic Range
fIN = 20 kHz
108
dB
Channel-to-Channel Crosstalk
fIN = 100 kHz on adjacent channel(s)
125
dB
SAMPLING DYNAMICS
3 dB Input Bandwidth
Full bandwidth
1.7
MHz
bandwidth
0.425
MHz
Aperture Delay
VDD = 5 V
2.5
ns
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