参数资料
型号: AD7731BRZ
厂商: Analog Devices Inc
文件页数: 12/44页
文件大小: 0K
描述: IC ADC 24BIT SIGMA-DELTA 24-SOIC
标准包装: 31
位数: 24
采样率(每秒): 6.4k
数据接口: DSP,串行,SPI?
转换器数目: 1
功率耗散(最大): 125mW
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: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC W
包装: 管件
输入数目和类型: 3 个差分,单极;3 个差分,双极;5 个伪差分,单极;5 个伪差分,双极
产品目录页面: 779 (CN2011-ZH PDF)
配用: EVAL-AD7731EBZ-ND - BOARD EVALUATION FOR AD7731
–2–
REV. 0
AD7731–SPECIFICATIONS
Parameter
Units
Conditions/Comments
STATIC PERFORMANCE (CHP = 0)
No Missing Codes
24
Bits min
SKIP = 0
Output Noise and Update Rates
Integral Nonlinearity
15
ppm of FSR max
Offset Error
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
0.5
V/°C typ
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
1/2/5
V/°C typ
Input Range = 320 mV/640 mV/1.28 V
Offset Drift vs. Time
2.5
V/1000 Hr
Positive Full-Scale Error
Positive Full-Scale Drift vs. Temp
0.6
V/°C typ
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
1.5/3/6
V/°C typ
Input Range = 320 mV/640 mV/1.28 V
Positive Full-Scale Drift vs. Time
3
V/1000 Hr
Gain Error
Gain Drift vs. Temperature
2
ppm/
°C typ
Gain Drift vs. Time
10
ppm/1000 Hr
Bipolar Negative Full-Scale Error
Negative Full-Scale Drift vs. Temp
1
V/°C typ
Power Supply Rejection
90
dB typ
Input Range = 20 mV
Power Supply Rejection
60
dB typ
Input Range = 1.28 V
Common-Mode Rejection (CMR)
On AIN
95
dB typ
At DC. Input Range = 20 mV
On AIN
85
dB typ
At DC. Input Range = 1.28 V
On REF IN
120
dB typ
Analog Input DC Bias Current
60
nA max
Analog Input DC Bias Current Drift
150
pA/
°C typ
Analog Input DC Offset Current
30
nA max
Analog Input DC Offset Current Drift
100
pA/
°C typ
STATIC PERFORMANCE (CHP = 1)
No Missing Codes
24
Bits min
Output Noise and Update Rates
Integral Nonlinearity
15
ppm of FSR max
Offset Error
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
5
nV/
°C typ
Unipolar Offset and Bipolar Zero Errors
Offset Drift vs. Time
25
nV/1000 Hr typ
Positive Full-Scale Error
Positive Full-Scale Drift vs. Temp
2
ppm of FS/
°C max
Positive Full-Scale Drift vs. Time
10
ppm of FS/1000 Hr
Gain Error
Gain Drift vs. Temperature
2
ppm/
°C max
Gain Drift vs. Time
10
ppm/1000 Hr
Bipolar Negative Full-Scale Error
Negative Full-Scale Drift vs. Temp
2
ppm of FS/
°C max
Power Supply Rejection
110
dB typ
Input Range = 20 mV
Power Supply Rejection
85
dB typ
Input Range = 1.28 V
Common-Mode Rejection (CMR)
On AIN
110
dB typ
At DC. Input Range = 20 mV
On AIN
85
dB typ
At DC. Input Range = 1.28 V
On REF IN
120
dB typ
Analog Input DC Bias Current
50
nA max
Analog Input DC Bias Current Drift
100
pA/
°C typ
Analog Input DC Offset Current
10
nA max
Analog Input DC Offset Current Drift
50
pA/
°C typ
ANALOG INPUTS/REFERENCE INPUTS
Normal Mode 50 Hz/60 Hz Rejection
88
dB min
50 Hz/60 Hz
±1 Hz. SKIP = 0
Common-Mode 50 Hz/60 Hz Rejection
120
dB min
50 Hz/60 Hz
±1 Hz. SKIP = 0
Analog Inputs
Differential Input Voltage Ranges
Assuming 2.5 V or 5 V Reference with HIREF
Bit Set Appropriately
0 to +20 or
±20
mV nom
RN2, RN1, RN0 of Mode Register = 0, 0, 1
0 to +40 or
±40
mV nom
RN2, RN1, RN0 of Mode Register = 0, 1, 0
0 to +80 or
±80
mV nom
RN2, RN1, RN0 of Mode Register = 0, 1, 1
0 to +160 or
±160
mV nom
RN2, RN1, RN0 of Mode Register = 1, 0, 0
0 to +320 or
±320
mV nom
RN2, RN1, RN0 of Mode Register = 1, 0, 1
0 to +640 or
±640
mV nom
RN2, RN1, RN0 of Mode Register = 1, 1, 0
0 to +1.28 or
±1.28
V nom
RN2, RN1, RN0 of Mode Register = 1, 1, 1
(AVDD = +5 V, DVDD = +3 V or +5 V; REF IN(+) = +2.5 V; REF IN(–) = AGND; AGND =
DGND = 0 V; fCLK IN = 4.9152 MHz. All specifications TMIN to TMAX unless otherwise noted.)
REV. A
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