AV
參數(shù)資料
型號(hào): AD7731BRZ-REEL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 23/44頁(yè)
文件大?。?/td> 0K
描述: IC ADC 24BIT SIGMA-DELTA 24-SOIC
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 24
采樣率(每秒): 6.4k
數(shù)據(jù)接口: DSP,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 125mW
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: 24-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 24-SOIC W
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 3 個(gè)差分,單極;3 個(gè)差分,雙極;5 個(gè)偽差分,單極;5 個(gè)偽差分,雙極
配用: EVAL-AD7731EBZ-ND - BOARD EVALUATION FOR AD7731
–3–
REV. 0
AD7731
Parameter
Units
Conditions/Comments
Absolute/Common-Mode Voltage
AGND + 1.2 V
V min
AVDD – 0.95 V
V max
Reference Input
REF IN(+) – REF IN (–) Voltage
+2.5
V nom
HIREF Bit of Mode Register = 0
REF IN(+) – REF IN (–) Voltage
+5
V nom
HIREF Bit of Mode Register = 1
Reference DC Input Current
5.5
A max
HIREF Bit of Mode Register = 0
Reference DC Input Current
10
A max
HIREF Bit of Mode Register = 1
Absolute/Common-Mode Voltage
AGND – 30 mV
V min
AVDD + 30 mV
V max
NO REF Trigger Voltage
0.3
V min
NO REF Bit Active If VREF Below This Voltage
0.65
V max
NO REF Bit Inactive If VREF Above This Voltage
LOGIC INPUTS
Input Current
±10
A max
All Inputs Except SCLK and MCLK IN
VINL, Input Low Voltage
0.8
V max
DVDD = +5 V
VINL, Input Low Voltage
0.4
V max
DVDD = +3 V
VINH, Input High Voltage
2.0
V min
SCLK Only (Schmitt Triggered Input)
VT+
1.4/3
V min/V max
DVDD = +5 V
VT+
0.95/2.5
V min/V max
DVDD = +3 V
VT–
0.8/1.4
V min/V max
DVDD = +5 V
VT–
0.4/1.1
V min/V max
DVDD = +3 V
VT+ – VT–
0.4/0.85
V min/V max
DVDD = +5 V
VT+ – VT–
0.4/0.8
V min/V max
DVDD = +3 V
MCLK IN Only
VINL, Input Low Voltage
0.8
V max
DVDD = +5 V
VINL, Input Low Voltage
0.4
V max
DVDD = +3 V
VINH, Input High Voltage
3.5
V min
DVDD = +5 V
VINH, Input High Voltage
2.5
V min
DVDD = +3 V
LOGIC OUTPUTS (Including MCLK OUT)
VOL, Output Low Voltage
0.4
V max
ISINK = 800 A Except for MCLK OUT
16 = +5 V
VOL, Output Low Voltage
0.4
V max
ISINK = 100 A Except for MCLK OUT
16 = +3 V
VOH, Output High Voltage
4.0
V min
ISOURCE = 200 A Except for MCLK OUT
16 = +5 V
VOH, Output High Voltage
DVDD – 0.6 V
V min
ISOURCE = 100 A Except for MCLK OUT
16 = +3 V
Floating State Leakage Current
±10
A max
Floating State Output Capacitance
6
pF typ
TRANSDUCER BURNOUT
AIN1(+) Current
–100
nA nom
AIN1(–) Current
100
nA nom
Initial Tolerance @ 25
°C
±10
% typ
Drift
0.1
%/
°C typ
SYSTEM CALIBRATION
Positive Full-Scale Calibration Limit
1.05
× FS
V max
FS Is the Nominal Full-Scale Voltage (20 mV,
40 mV, 80 mV, 160 mV, 320 mV, 640 mV, 1.28 V)
Negative Full-Scale Calibration Limit
–1.05
× FS
V max
Offset Calibration Limit
–1.05
× FS
V min
Input Span
0.8
× FS
V min
2.1
× FS
V max
POWER REQUIREMENTS
Power Supply Voltages
AVDD – AGND Voltage
+5
V nom
DVDD Voltage
+2.7 to +5.25
V min to V max
With AGND = 0 V
Power Supply Currents
External MCLK. Digital I/Ps = 0 V or DVDD
AVDD Current (Normal Mode)
10.3
mA max
DVDD Current (Normal Mode)
1.7
mA max
DVDD of 2.7 V to 3.3 V
DVDD Current (Normal Mode)
3.2
mA max
DVDD of 4.75 V to 5.25 V
AVDD + DVDD Current (Standby Mode)
25
A max
Typically 10
A. External MCLK IN = 0 V or DV
DD
Power Dissipation
AVDD = DVDD = +5 V. Digital I/Ps = 0 V or DVDD
Normal Mode
67.5
mW max
Standby Mode
125
W max
Typically 50
W. External MCLK IN = 0 V or DV
DD
REV. A
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