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COMBOSMARTMETER 数据表(PDF) 7 Page - Texas Instruments

部件名 COMBOSMARTMETER
功能描述  Analog Front-End for Power Monitoring, Control, and Protection
PDF  60 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

COMBOSMARTMETER 数据表(HTML) 7 Page - Texas Instruments

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ADS131E04
ADS131E06
ADS131E08
www.ti.com
SBAS561A – JUNE 2012 – REVISED APRIL 2013
PARAMETER MEASUREMENT INFORMATION
NOISE MEASUREMENTS
The ADS131E0x noise performance can be optimized by adjusting the data rate and PGA setting. As the
averaging is increased by reducing the data rate, the noise drops correspondingly. Increasing the PGA value
reduces the input-referred noise, which is particularly useful when measuring low-level signals. Table 1
summarizes the ADS131E0x noise performance with a 3-V analog power supply. Table 2 summarizes the
ADS131E0x noise performance with a 5-V analog power supply. The data are representative of typical noise
performance at TA = +25°C. The data shown are the result of averaging the readings from multiple devices and
are measured with the inputs shorted together. A minimum of 1000 consecutive readings are used to calculate
the RMS and peak-to-peak noise for each reading. For the two highest data rates, the noise is limited by ADC
quantization noise and does not have a Gaussian distribution. Table 1 and Table 2 show measurements taken
with an internal reference. The data are also representative of the ADS131E0x noise performance when using a
low-noise external reference, such as the REF5025.
Table 1. Input-Referred Noise, 3-V Analog Supply, and 2.4-V Reference(1)
PGA GAIN
OUTPUT
x1
x2
x4
x8
x12
DR BITS
DATA
–3-dB
(CONFIG1
RATE
BANDWIDTH
DYNAMIC
DYNAMIC
DYNAMIC
DYNAMIC
DYNAMIC
Register)
(kSPS)
(Hz)
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
000
64
16768
74.1
12.31
74.1
12.30
74.0
12.29
74.0
12.29
73.9
12.27
001
32
8384
89.6
14.89
89.6
14.88
89.4
14.85
88.6
14.71
87.6
14.55
010
16
4192
102.8
17.07
102.3
16.99
100.6
16.72
97.1
16.12
94.2
15.65
011
8
2096
108.2
18.0
107.4
17.9
105.2
17.5
101.6
16.9
98.9
16.5
100
4
1048
111.4
18.6
109.4
18.4
107.4
18.1
103.5
17.4
100.5
17.0
101
2
524
114.6
19.1
113.7
19.0
111.4
18.6
107.7
18.0
104.9
17.5
110
1
262
117.7
19.6
116.8
19.5
114.5
19.1
110.7
18.5
108.0
18.0
(1)
At least 1000 consecutive readings were used to calculate the peak-to-peak noise values in this table.
Table 2. Input-Referred Noise, 5-V Analog Supply, and 4-V Reference
PGA GAIN
OUTPUT
x1
x2
x4
x8
x12
DR BITS
DATA
–3-dB
(CONFIG1
RATE
BANDWIDTH
DYNAMIC
DYNAMIC
DYNAMIC
DYNAMIC
DYNAMIC
Register)
(kSPS)
(Hz)
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
RANGE (dB)
ENOB
000
64
16768
74.7
12.41
74.7
12.41
74.7
12.41
74.7
12.41
74.6
12.39
001
32
8384
90.3
15.01
90.3
15.00
90.2
14.99
89.9
14.93
89.4
14.85
010
16
4192
104.3
17.33
104.0
17.28
103.1
17.12
100.5
16.70
98.1
16.30
011
8
2096
112.3
18.7
111.6
18.6
109.7
18.3
106.3
17.7
103.8
17.3
100
4
1048
116.0
19.3
115.2
19.2
113.1
18.8
109.5
18.3
106.9
17.8
101
2
524
119.1
19.8
118.2
19.7
116.2
19.4
112.6
18.8
109.9
18.3
110
1
262
122.1
20.4
121.3
20.2
119.1
19.9
115.6
19.3
112.9
18.8
Copyright © 2012–2013, Texas Instruments Incorporated
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Product Folder Links: ADS131E04 ADS131E06 ADS131E08



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