AVDD = DVDD = 2.5 V; OVDD = 2.3 V to 3.6 V; VREF
參數(shù)資料
型號: AD7643BSTZRL
廠商: Analog Devices Inc
文件頁數(shù): 22/28頁
文件大?。?/td> 0K
描述: IC ADC 18BIT DIFFER W/REF 48LQFP
標(biāo)準(zhǔn)包裝: 2,000
系列: PulSAR®
位數(shù): 18
采樣率(每秒): 1.25M
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 80mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個(gè)差分,雙極
配用: EVAL-AD7643CBZ-ND - BOARD EVALUATION FOR AD7643
AD7643
Rev. 0 | Page 3 of 28
SPECIFICATIONS
AVDD = DVDD = 2.5 V; OVDD = 2.3 V to 3.6 V; VREF = 2.5 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
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
AVDD1
V
Analog Input CMRR
fIN = 100 kHz
58
dB
Input Current
1.25 MSPS throughput
2.5
μA
Input Impedance2
THROUGHPUT SPEED
Complete Cycle
800
ns
Throughput Rate
1.25
MSPS
DC ACCURACY
Integral Linearity Error3
3
±1.5
+3
LSB4
No Missing Codes
18
Bits
Differential Linearity Error
1
+1.25
LSB
Transition Noise
VREF = 2.5 V
1.7
LSB
VREF = 2.048 V
2.0
LSB
Zero Error, TMIN to TMAX5
16
+16
LSB
Zero Error Temperature Drift
±1
ppm/°C
Gain Error, TMIN to TMAX5
22
+22
LSB
Gain Error Temperature Drift
±1
ppm/°C
Power Supply Sensitivity
AVDD = 2.5 V ± 5%
±16
LSB
AC ACCURACY
Dynamic Range
VREF = 2.5 V
95
dB6
Signal-to-Noise
fIN = 1 kHz, VREF = 2.5 V
93.5
dB
fIN = 20 kHz, VREF = 2.5 V
93.5
dB
fIN = 20 kHz, VREF = 2.048 V
92
dB
fIN = 100 kHz, VREF = 2.5 V
93
dB
Spurious-Free Dynamic Range
fIN = 1 kHz, VREF = 2.5 V
118
dB
fIN = 20 kHz, VREF = 2.5 V
114
dB
fIN = 20 kHz, VREF = 2.048 V
111
dB
fIN = 100 kHz, VREF = 2.5 V
108
dB
Total Harmonic Distortion
fIN = 1 kHz, VREF = 2.5 V
114
dB
fIN = 20 kHz, VREF = 2.5 V
113
dB
fIN = 20 kHz, VREF = 2.048 V
109
dB
fIN = 100 kHz, VREF = 2.5 V
105
dB
Signal-to-(Noise + Distortion)
fIN = 1 kHz, VREF = 2.5 V
93.5
dB
fIN = 20 kHz, VREF = 2.5 V
93.5
dB
fIN = 20 kHz, VREF = 2.048 V
91.8
dB
fIN = 100 kHz, VREF = 2.5 V
92.5
dB
3 dB Input Bandwidth
50
MHz
SAMPLING DYNAMICS
Aperture Delay
1
ns
Aperture Jitter
5
ps rms
Transient Response
Full-scale step
250
ns
INTERNAL REFERENCE
PDREF = PDBUF = low
Output Voltage
REF @ 25°C
2.038
2.048
2.058
V
Temperature Drift
40°C to +85°C
±8
ppm/°C
Line Regulation
AVDD = 2.5 V ± 5%
±15
ppm/V
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