AD7714AR-3 Analog Devices Inc, AD7714AR-3 Datasheet - Page 13

• Manufacturer Part Number: AD7714AR-3
• Description: IC ADC 24BIT SIGMA-DELTA 24-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD7714AR-3

• Rohs Status: RoHS non-compliant
• Number Of Bits: 24
• Sampling Rate (per Second): 1k
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 7mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.300", 7.50mm Width)
• For Use With: EVAL-AD7714-3EBZ - BOARD EVALUATION FOR AD7714

BUFFERED MODE NOISE
Table III shows the typical output rms noise and effective resolution for some typical notch and –3 dB frequencies for the AD7714-
5 with f
MHz and BUFFER = +5 V. The numbers given are for the bipolar input ranges and are generated with a differential analog input
voltage of 0 V. For the AD7714-5, the V
brackets in each table are for the effective resolution of the part (rounded to the nearest 0.5 LSB). The effective resolution of the
device is defined as the ratio of the output rms noise to the input full scale (i.e., 2 V
calculated using peak-to-peak output noise numbers. Peak-to-peak noise numbers can be up to 6.6 times the rms numbers while
effective resolution numbers based on peak-to-peak noise can be 2.5 bits below the effective resolution based on rms noise as quoted
in the tables.
Filter First
Notch & O/P –3 dB
Data Rate
5 Hz
10 Hz
25 Hz
30 Hz
50 Hz
60 Hz
100 Hz
250 Hz
500 Hz
1 kHz
Filter First
Notch & O/P –3 dB
Data Rate
5 Hz
10 Hz
25 Hz
30 Hz
50 Hz
60 Hz
100 Hz
250 Hz
500 Hz
1 kHz
REV. C
CLK IN
= 2.4576 MHz and BUFFER = +5 V. Table IV gives the information for the AD7714-3 again with f
Frequency
1.31 Hz
2.62 Hz
6.55 Hz
7.86 Hz
13.1 Hz
15.72 Hz
26.2 Hz
65.5 Hz
131 Hz
262 Hz
Frequency
1.31 Hz
2.62 Hz
6.55 Hz
7.86 Hz
13.1 Hz
15.72 Hz
26.2 Hz
65.5 Hz
131 Hz
262 Hz
Table III. AD7714-5 Buffered Mode Output Noise/Resolution for f
Table IV. AD7714-3 Buffered Mode Output Noise/Resolution for f
0.99
1.5
2.5
2.9
4.2
6.1
13.8
87
508
2860 (11)
1.16
1.7
3.5
3.7
4.5
5.3
10
47
300
1722 (10.5) 735
Gain of
Gain of
1
1
(22.5) 0.68 (22)
(21.5) 0.95 (21.5) 0.63 (21)
(21)
(20.5) 1.8
(20)
(19.5) 2.9
(18.5) 6.5
(16)
(13.5) 241
(21)
(20.5) 1
(19.5) 1.8
(19.5) 2.2
(19)
(19)
(18)
(15.5) 29
(13.5) 171
REF
1.7
2.5
56
1700 (10.5) 745 (10.5) 480 (10.5) 197 (10.5) 94
0.76 (20.5) 0.34 (20)
3
3.3
4.9
Gain of
Gain of
voltage is +2.5 V while for the AD7714 the V
2
2
Typical Output RMS Noise in V (Effective Resolution in Bits)
(20.5) 0.88 (20.5) 0.75 (19.5) 0.57 (19)
(20.5) 1
(20)
(19.5) 2
(18.5) 3.5 (18.5) 2.2 (18)
(15.5) 25
(13.5) 117 (13.5) 73
Typical Output RMS Noise in V (Effective Resolution in Bits)
(20.5) 0.7 (20)
(19.5) 1.1 (19)
(19)
(18.5) 1.7 (18.5) 1.0 (18)
(18.5) 1.8 (18.5) 1.1 (18)
(18)
(15.5) 15
(13)
(10.5) 380 (10.5) 230 (10.5) 93
0.46 (21.5) 0.26 (21)
1.5 (19.5) 1.1 (19)
1.3 (19)
3.1 (17.5) 1.5 (17.5) 1.2 (17)
74
Gain of
Gain of
4
4
(20)
(19.5) 1.2 (19)
(15.5) 11
(15.5) 7.5 (15.5) 4.7 (15)
(13)
–13–
0.41 (20.5) 0.39 (19.5) 0.36 (18.5) 0.36 (17.5) 0.36 (16.5)
0.87 (19.5) 0.75 (18.5) 0.72 (17.5) 0.72 (16.5) 0.71 (15.5)
0.29 (20)
0.46 (19.5) 0.45 (18.5) 0.4 (17.5) 0.4 (16.5) 0.4 (15.5)
0.74 (18.5) 0.63 (18)
0.76 (18.5) 0.68 (18)
35
Gain of
Gain of
8
8
(15.5) 5.7 (15.5) 3.6 (15.5) 2.4 (15)
(13)
(13)
0.26 (20)
0.94 (18.5) 0.94 (17.5) 0.94 (16.5) 0.87 (15.5)
1
1.3 (18)
34
0.29 (19)
0.92 (17.5) 0.9 (16.5) 0.89 (15.5) 0.89 (14.5)
1
21
Gain of
Gain of
REF
16
16
/GAIN). It should be noted that it is not
(18.5) 0.97 (17.5) 0.95 (16.5) 0.94 (15.5)
(13)
(17)
(13)
(10.5) 55
REF
CLK IN
CLK IN
voltage is +1.25 V. The numbers in
0.57 (18)
0.96 (16.5) 0.96 (15.5) 0.96 (14.5)
0.26 (19)
1.2 (17)
16
0.28 (18)
0.6 (17)
0.66 (17)
1.2 (16)
2.6 (15)
8.6 (13)
= 2.4576 MHz
= 2.4576 MHz
Gain of
Gain of
32
32
(13)
(10.5) 53
(10.5) 30
0.26 (18)
0.57 (17)
8.5 (13)
0.6 (16)
2.5 (14)
1.3 (16)
0.26 (17)
0.66 (16)
1.2 (15)
5.6 (13)
Gain of
Gain of
64
64
(10.5) 23
(10.5) 12
CLK IN
AD7714
0.26 (17)
0.56 (16)
1.1 (15)
2.1 (14)
5.2 (13)
0.26 (16)
0.6 (15)
1.2 (14)
1.6 (13.5)
3.1 (12.5)
0.66 (15)
Gain of
Gain of
= 2.4576
128
128
(10.5)
(10.5)
2