参数资料
型号: AD7678ASTZRL
厂商: Analog Devices Inc
文件页数: 22/28页
文件大小: 0K
描述: IC ADC 18BIT SAR 100KSPS 48-LQFP
标准包装: 2,000
系列: PulSAR®
位数: 18
采样率(每秒): 100k
数据接口: 串行,并联
转换器数目: 1
功率耗散(最大): 26mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
输入数目和类型: 1 个差分,双极
配用: EVAL-AD7678CB-ND - BOARD EVALUATION FOR AD7678
AD7678
Rev. A | Page 3 of 28
SPECIFICATIONS
Table 2. –40°C to +85°C, VREF = 4.096 V, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.
Parameter
Conditions
Min
Typ
Max
Unit
RESOLUTION
18
Bits
ANALOG INPUT
Voltage Range
VIN+ – VIN–
–VREF
+VREF
V
Operating Input Voltage
VIN+, VIN– to AGND
–0.1
AVDD + 0.1
V
Analog Input CMRR
fIN = 100 kHz
65
dB
Input Current
100 kSPS Throughput
4
μA
THROUGHPUT SPEED
Complete Cycle
10
μs
Throughput Rate
0
100
kSPS
DC ACCURACY
Integral Linearity Error
–2.5
+2.5
Differential Linearity Error
–1
+1.75
LSB
No Missing Codes
18
Bits
Transition Noise
VREF = 5 V
0.7
LSB
Zero Error, TMIN to TMAX
–40
±40
LSB
Zero Error Temperature Drift
±0.5
ppm/°C
Gain Error, TMIN to TMAX3
–0.048
See Note 3
+0.048
% of FSR
Gain Error Temperature Drift
±1.6
ppm/°C
Power Supply Sensitivity
AVDD = 5 V ± 5%
±4
LSB
AC ACCURACY
Signal-to-Noise
fIN = 2 kHz, VREF = 5 V
101
dB4
VREF = 4.096 V
98
100
dB
fIN = 10 kHz, VREF = 4.096 V
99.5
dB
fIN = 45 kHz, VREF = 4.096 V
98
dB
Dynamic Range
VIN+ = VIN– = VREF/2 = 2.5 V
103
dB
Spurious-Free Dynamic Range
fIN = 2 kHz
120
dB
fIN = 10 kHz
117
dB
fIN = 45 kHz
110
dB
Total Harmonic Distortion
fIN = 2 kHz
–118
dB
fIN = 10 kHz
–115
dB
fIN = 45 kHz
–110
dB
Signal-to-(Noise + Distortion)
fIN = 2 kHz
100
dB
fIN = 2 kHz, –60 dB Input
41
dB
–3 dB Input Bandwidth
900
kHz
SAMPLING DYNAMICS
Aperture Delay
2
ns
Aperture Jitter
5
ps rms
Transient Response
Full-Scale Step
8.5
μs
Overvoltage Recovery
8.5
μs
REFERENCE
External Reference Voltage Range
REF
3
4.096
AVDD + 0.1
V
REF Voltage with Reference Buffer
REFBUFIN = 2.5 V
4.05
4.096
4.15
V
Reference Buffer Input Voltage Range
REFBUFIN
1.8
2.5
2.6
V
REFBUFIN Input Current
–1
+1
μA
REF Current Drain
100 kSPS Throughput
42
μA
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