AD7190BRUZ-REEL Analog Devices Inc, AD7190BRUZ-REEL Datasheet - Page 15

• Manufacturer Part Number: AD7190BRUZ-REEL
• Description: 2ch UltraLow Noise 24Bit SD ADC IC.
• Manufacturer: Analog Devices Inc

Specifications of AD7190BRUZ-REEL

• Design Resources: Precision Weigh Scale Design Using AD7190 with Internal PGA (CN0102)
• Number Of Bits: 24
• Sampling Rate (per Second): 4.8k
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RMS NOISE AND RESOLUTION
The AD7190 has a choice of two filter types: sinc
In addition, the AD7190 can be operated with chop enabled
or chop disabled.
The following tables show the rms noise of the AD7190 for some
of the output data rates and gain settings with chop disabled
and enabled for the sinc
are for the bipolar input range with the external 5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V when the ADC is continuously converting
SINC
Table 6. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
Table 7. Effective Resolution (Peak-to-Peak Resolution) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
1
The output peak-to-peak (p-p) resolution is listed in parentheses.
4
CHOP DISABLED
Output Data
Rate (Hz)
4.7
7.5
10
50
60
150
300
960
2400
4800
Output Data
Rate (Hz)
4.7
7.5
10
50
60
150
300
960
2400
4800
4
and sinc
Settling
Time (ms)
852.5
533
400
80
66.7
26.7
13.3
4.17
1.67
0.83
3
filters. The numbers given
Settling
Time (ms)
852.5
533
400
80
66.7
26.7
13.3
4.17
1.67
0.83
Gain of 1
24 (22.5)
24 (22)
24 (22)
23.5 (20.5)
23.5 (20.5)
22.5 (20)
22.5 (19.5)
21.5 (19)
21 (18)
19.5 (16.5)
4
and sinc
Gain of 1
250
310
330
900
970
1460
1900
3000
5000
14,300
1
3
.
Rev. B | Page 15 of 40
Gain of 8
24 (22)
24 (22)
24 (22)
23.5 (20.5)
23 (20.5)
22.5 (19.5)
22 (19.5)
21.5 (18.5)
20.5 (18)
19.5 (16.5)
Gain of 8
38
45
50
125
140
215
285
480
780
1920
1
on a single channel. The effective resolution is also shown, and
the output peak-to-peak (p-p) resolution, or noise-free resol-
ution, is listed in parentheses. It is important to note that the
effective resolution is calculated using the rms noise, wheras the
p-p resolution is calculated based on peak-to-peak noise. The
p-p resolution represents the resolution for which there is no
code flicker. These numbers are typical and are rounded to the
nearest ½ LSB.
Gain of 16
21
25
30
78
88
125
170
280
440
1000
Gain of 16
24 (22)
24 (22)
24 (21.5)
23 (20)
22.5 (20)
22.5 (19.5)
22 (19)
21 (18.5)
20.5 (17.5)
19.5 (16.5)
1
Gain of 32
12
16
18
45
52
75
100
175
280
550
Gain of 32
24 (22)
24 (21.5)
24 (21.5)
22.5 (20)
22.5 (20)
22 (19.5)
21.5 (19)
21 (18)
20 (17.5)
19 (16.5)
1
Gain of 64
10
12
14
33
36
55
75
140
220
380
Gain of 64
24 (21)
23.5 (21)
23.5 (20.5)
22 (19.5)
22 (19.5)
21.5 (18.5)
21 (18.5)
20 (17.5)
19.5 (16.5)
18.5 (16)
1
Gain of 128
8.5
10.5
11.5
28
31
48
67
121
198
295
Gain of 128
23 (20.5)
23 (20)
22.5 (20)
21.5 (18.5)
21.5 (18.5)
20.5 (18)
20 (17.5)
19.5 (16.5)
18.5 (16)
18 (15.5)
AD7190
1