參數(shù)資料
型號: AD7719BR-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 34/40頁
文件大?。?/td> 0K
描述: IC ADC 16BIT 24BIT DUAL 28-SOIC
標準包裝: 400
位數(shù): 16/24
采樣率(每秒): 105
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數(shù)目: 2
功率耗散(最大): 4.5mW
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: 28-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 28-SOIC W
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 3 個差分,單極;3 個差分,雙極
REV. A
AD7719
–4–
Parameter
AD7719B
Unit
Test Conditions
AUXILIARY CHANNEL (continued)
Offset Error
3
±3
V typ
Selected Channel = AIN5/AIN6
Offset Error Drift vs. Temperature
4
±10
nV/°C typ
Full-Scale Error
6, 7
±0.75
LSB typ
Gain Drift vs. Temperature
4
0.5
ppm/°C typ
Negative Full-Scale Error
±1
LSB typ
Power Supply Rejection (PSR)
70
dB min
AIN = 1 V Input Range = ±2.5 V, Typically 80 dB
ANALOG INPUTS
Differential Input Voltage Ranges
±REFIN2
V nom
ARN = 1
±REFIN2/2
V nom
ARN = 0
Absolute AIN Voltage Limits
AGND – 30 mV
V min
Unbuffered Input
AVDD + 30 mV
V max
Analog Input Current
DC Input Current
±125
nA/V typ
Input Current Varies with Input Voltage
DC Input Current Drift
±2
pA/V/°C typ
Normal-Mode Rejection
2, 8
@ 50 Hz
100
dB min
50 Hz ±1 Hz, SF = 82
@ 60 Hz
100
dB min
60 Hz ±1 Hz, SF = 68
Common-Mode Rejection
@ DC
85
dB min
Input Range = ±2.5 V, AIN = 1 V
@ 50 Hz
2
90
dB min
50 Hz ±1 Hz, Range = 2.5 V, AIN = 1 V
@ 60 Hz
2
90
dB min
60 Hz ±1 Hz, Range = 2.5 V, AIN = 1 V
REFERENCE INPUT (REFIN2)
With Respect to AGND
REFIN2 Voltage
2.5
V nom
REFIN2 Range
2
1V min
AVDD
V max
Reference DC Input Current
2
0.2
A/V typ
Reference DC Input Current Drift
0.003
nA/V/°C typ
EXCITATION CURRENT SOURCES
(IEXC1 and IEXC2)
Output Current
200
A nom
Initial Tolerance at 25°C
±10
% typ
Drift
200
ppm/°C typ
Initial Current Matching at 25°C±1% typ
Matching between IEXC1 and IEXC2
No Load
Drift Matching
20
ppm/°C typ
Line Regulation (AVDD)
2.1
A/V max
AVDD = 5 V ± 5%. Typically 1.25 A/V
Load Regulation
300
nA/V typ
Output Compliance
AVDD – 0.6
V max
AGND – 30 mV
V min
LOW-SIDE POWER SWITCHES
(SW1, SW2)
RON
5
max
AVDD = 5 V. Typically 3
7
max
AVDD = 3 V. Typically 4.5
Allowable Current
2
20
mA max
Continuous Current per Switch
TEMPERATURE SENSOR
Accuracy
See TPC 5
°C typ
TRANSDUCER BURNOUT
AIN(+) Current
–100
nA typ
AIN(–) Current
100
nA typ
Initial Tolerance @ 25°C
±15
% typ
Drift
0.03
%/°C typ
SYSTEM CALIBRATION
2, 9
Full-Scale Calibration Limit
1.05
× FS10
V max
Zero-Scale Calibration Limit
–1.05
× FS
V min
Input Span
0.8
× FS
V min
2.1
× FS
V max
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