VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, REF = VDD, TA
參數資料
型號: AD7946BRMZ
廠商: Analog Devices Inc
文件頁數: 18/24頁
文件大小: 0K
描述: IC ADC 14BIT 500KSPS SAR 10-MSOP
標準包裝: 50
系列: PulSAR®
位數: 14
采樣率(每秒): 500k
數據接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數目: 1
功率耗散(最大): 19mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 10-MSOP
包裝: 管件
輸入數目和類型: 1 個偽差分,單極
產品目錄頁面: 780 (CN2011-ZH PDF)
配用: EVAL-AD7946CBZ-ND - BOARD EVALUATION FOR AD7946
AD7946
Rev. A | Page 3 of 24
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, REF = 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
REF
V
Absolute Input Voltage
IN+
0.1
VDD + 0.1
V
IN
0.1
V
Analog Input CMRR
fIN = 200 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
±0.3
+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
±0.3
±6
LSB
Gain Error Temperature Drift
±1
ppm/°C
Offset Error2, TMIN to TMAX
±0.3
±6
LSB
Offset Temperature Drift
±1
ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±0.1
LSB
THROUGHPUT
Conversion Rate
0
500
kSPS
Transient Response
Full-scale step
400
ns
AC ACCURACY
Signal-to-Noise
fIN = 20 kHz, REF = 5 V
84.5
85
dB3
fIN = 20 kHz, REF = 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, REF = 5 V
84.5
85
dB
fIN = 20 kHz, REF = 5 V, 60 dB input
25
dB
Intermodulation Distortion4
100
dB
1 LSB means least significant bit. With the 5 V input range, one LSB is 305.2 μV.
2 See the Terminology section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
3 All 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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