EVAL-AD7797EBZ Analog Devices Inc, EVAL-AD7797EBZ Datasheet - Page 9

• Manufacturer Part Number: EVAL-AD7797EBZ
• Description: BOARD EVALUATION FOR AD7797
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7797EBZ

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 123
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±VREF/128
• Power (typ) @ Conditions: 1.6mW @ 123SPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7797
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RMS NOISE AND RESOLUTION SPECIFICATIONS
Table 6 shows the rms noise of the AD7796/AD7797 for some
of the update rates. 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 7 and Table 8 show the effective resolution, while the
output peak-to-peak (p-p) resolution is shown in brackets. 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 0.5 LSB.
Rev. A | Page 9 of 24
Table 6. RMS Noise (μV) vs. Output Update Rate for the
AD7796/AD7797 Using a 2.5 V Reference
Update Rate (Hz)
4.17
6.25
8.33
10
12.5
16.7
33.2
50
62
123
Table 7. Typical Resolution (Bits) vs. Output Update Rate for
the AD7797 Using a 2.5 V Reference
Update Rate (Hz)
4.17
6.25
8.33
10
12.5
16.7
33.2
50
62
123
Table 8. Typical Resolution (Bits) vs. Output Update Rate for
the AD7796 Using a 2.5 V Reference
Update Rate (Hz)
4.17
6.25
8.33
10
12.5
16.7
33.2
50
62
123
Effective Bits (p-p)
19 (16.5)
19 (16.5)
19 (16)
18.5 (16)
18.5 (16)
18.5 (15.5)
18 (15)
17.5 (15)
17.5 (14.5)
16.5 (13.5)
RMS Noise (μV)
0.065
0.07
0.08
0.09
0.1
0.12
0.17
0.21
0.23
0.43
Effective Bits (p-p)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
16 (15)
16 (15)
16 (14.5)
16 (13.5)
AD7796/AD7797