EVAL-AD7792EBZ Analog Devices Inc, EVAL-AD7792EBZ Datasheet - Page 11

• Manufacturer Part Number: EVAL-AD7792EBZ
• Description: BOARD EVALUATION FOR AD7792
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7792EBZ

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 470
• Data Interface: Serial
• Inputs Per Adc: 3 Differential
• Input Range: ±VREF/gain
• Power (typ) @ Conditions: 2.5mW @ 470SPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Utilized Ic / Part: AD7792
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

OUTPUT NOISE AND RESOLUTION SPECIFICATIONS
EXTERNAL REFERENCE
Table 5 shows the output rms noise of the AD7792/AD7793 for
some of the update rates and gain settings. The numbers given
are for the bipolar input range with an external 2.5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V. Table 6 and Table 7 show the effective
resolution, with the output peak-to-peak (p-p) resolution
Table 5. Output RMS Noise (μV) vs. Gain and Output Update Rate for the AD7792 and AD7793 Using an External 2.5 V Reference
Update Rate (Hz)
4.17
8.33
16.7
33.2
62
123
242
470
Table 6. Typical Resolution (Bits) vs. Gain and Output Update Rate for the AD7793 Using an External 2.5 V Reference
Update Rate (Hz)
4.17
8.33
16.7
33.2
62
123
242
470
Table 7. Typical Resolution (Bits) vs. Gain and Output Update Rate for the AD7792 Using an External 2.5 V Reference
Update Rate (Hz)
4.17
8.33
16.7
33.2
62
123
242
470
Gain of 1
0.64
1.04
1.55
2.3
2.95
4.89
11.76
11.33
Gain of 1
23 (20.5)
22 (19.5)
21.5 (19)
21 (18.5)
20.5 (18)
20 (17.5)
18.5 (16)
18.5 (16)
Gain of 1
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
Gain of 2
0.6
0.96
1.45
2.13
2.85
4.74
9.5
9.44
Gain of 2
22 (19.5)
21.5 (19)
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
18 (15.5)
18 (15.5)
Gain of 2
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
16 (15.5)
Gain of 4
0.29
0.38
0.54
0.74
0.92
1.49
4.02
3.07
Gain of 4
22 (19.5)
21.5 (19)
21 (18.5)
20.5 (18)
20.5 (18)
19.5 (17)
18 (15.5)
18.5 (16)
Gain of 4
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
16 (16)
Rev. B | Page 11 of 32
Gain of 8
Gain of 8
21.5 (19)
21 (18.5)
20.5 (18)
20 (17.5)
Gain of 8
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
0.22
0.26
0.36
0.5
0.58
1
1.96
1.79
20 (17.5)
19 (16.5)
18 (15.5)
18.5 (16)
16 (16)
shown in parentheses for the AD7793 and AD7792, respectively.
It is important to note that the effective resolution is calculated
using the rms noise, while the p-p resolution is based on the p-p
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 LSB.
Gain of 16
Gain of 16
Gain of 16
16 (16)
16 (15.5)
0.1
0.13
0.18
0.23
0.29
0.48
0.88
0.99
21.5 (19)
21 (18.5)
20.5 (18)
20.5 (18)
20 (17.5)
19.5 (17)
18.5 (16)
18 (15.5)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
Gain of 32
0.065
0.078
0.11
0.17
0.2
0.32
0.45
0.63
Gain of 32
21 (18.5)
21 (18.5)
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
Gain of 32
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
Gain of 64
0.039
0.057
0.087
0.124
0.153
0.265
0.379
0.568
Gain of 64
21 (18.5)
20.5 (18)
20 (17.5)
19 (16.5)
19 (16.5)
18 (15.5)
17.5 (15)
17 (14.5)
Gain of 64
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
165 (15.5)
16 (15)
16 (14.5)
AD7792/AD7793
Gain of 128
Gain of 128
Gain of 128
0.041
0.055
0.086
0.118
0.144
0.283
0.397
0.593
20 (17.5)
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
17 (14.5)
16.5 (14)
16 (13.5)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
16 (14.5)
16 (14)
15.5 (13.5)