AD7715ANZ-3 Analog Devices Inc, AD7715ANZ-3 Datasheet - Page 12

• Manufacturer Part Number: AD7715ANZ-3
• Description: IC ADC 16BIT SIGMA-DELTA 16DIP
• Manufacturer: Analog Devices Inc

Specifications of AD7715ANZ-3

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 16
• Sampling Rate (per Second): 500
• Number Of Converters: 1
• Power Dissipation (max): 9.5mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Resolution (bits): 16bit
• Input Channel Type: Differential
• Supply Voltage Range - Analogue: 3V To 3.6V
• Supply Voltage Range - Digital: 3V To 5.25V
• Supply Current: 600µA
• No. Of: RoHS Compliant
• Sampling Rate: 19.2kSPS
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7715-3EBZ - BOARD EVALUATION FOR AD7715
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7715
OUTPUT NOISE
AD7715-5
Table V shows the AD7715-5 output rms noise for the selectable notch and –3 dB frequencies for the part, as selected by FS1 and
FS0 of the Setup Register. The numbers given are for the bipolar input ranges with a V
and are generated at a differential analog input voltage of 0 V with the part used in unbuffered mode (BUF bit of the Setup Register
= 0). Table VI meanwhile shows the output peak-to-peak noise for the selectable notch and –3 dB frequencies for the part. It is im-
portant to note that these numbers represent the resolution for which there will be no code flicker. They are not calculated based on rms noise but
on peak-to-peak noise. The numbers given are for the bipolar input ranges with a V
Register = 0. These numbers are typical, are generated at an analog input voltage of 0 V and are rounded to the nearest LSB.
Meanwhile, Table VII and Table VIII show rms noise and peak-to-peak resolution respectively with the AD7715-5 operating under
the same conditions as above except that now the part is operating in buffered mode (BUF Bit of the Setup Register = 1).
Filter First Notch & O/P Data Rate
MCLK IN =
2.4576 MHz
50 Hz
60 Hz
250 Hz
500 Hz
Filter First Notch & O/P Data Rate
MCLK IN =
2.4576 MHz
50 Hz
60 Hz
250 Hz
500 Hz
Filter First Notch & O/P Data Rate
MCLK IN =
2.4576 MHz
50 Hz
60 Hz
250 Hz
500 Hz
Filter First Notch & O/P Data Rate
MCLK IN =
2.4576 MHz
50 Hz
60 Hz
250 Hz
500 Hz
Table VI. Peak-to-Peak Resolution vs. Gain and Output Update Rate for AD7715-5 (Unbuffered Mode)
Table VIII. Peak-to-Peak Resolution vs. Gain and Output Update Rate for AD7715-5 (Buffered Mode)
Table V. Output RMS Noise vs. Gain and Output Update Rate for AD7715-5 (Unbuffered Mode)
Table VII. Output RMS Noise vs. Gain and Output Update Rate for AD7715-5 (Buffered Mode)
MCLK IN =
1 MHz
20 Hz
25 Hz
100 Hz
200 Hz
MCLK IN =
1 MHz
20 Hz
25 Hz
100 Hz
200 Hz
MCLK IN =
1 MHz
20 Hz
25 Hz
100 Hz
200 Hz
MCLK IN =
1 MHz
20 Hz
25 Hz
100 Hz
200 Hz
65.5 Hz
13.1 Hz
15.72 Hz
65.5 Hz
131 Hz
15.72 Hz
65.5 Hz
13.1 Hz
15.72 Hz
65.5 Hz
131 Hz
MCLK IN =
2.4576 MHz
13.1 Hz
15.72 Hz
131 Hz
MCLK IN =
2.4576 MHz
MCLK IN =
2.4576 MHz
13.1 Hz
131 Hz
MCLK IN =
2.4576 MHz
–3 dB Frequency
–3 dB Frequency
–3 dB Frequency
–3 dB Frequency
5.24 Hz
26.2 Hz
52.4 Hz
5.24 Hz
6.55 Hz
26.2 Hz
52.4 Hz
5.24 Hz
6.55 Hz
26.2 Hz
52.4 Hz
5.24 Hz
6.55 Hz
26.2 Hz
52.4 Hz
MCLK IN =
1 MHz
6.55 Hz
MCLK IN =
1 MHz
MCLK IN =
1 MHz
MCLK IN =
1 MHz
–12–
GAIN = 1
3.8
4.8
103
530
GAIN = 1
16
16
13
10
GAIN = 1
4.3
5.1
103
550
GAIN = 1
16
16
13
10
Typical Peak-to-Peak Resolution in Bits
Typical Peak-to-Peak Resolution in Bits
REF
of +2.5 V and for the BUF bit of the Setup
Typical Output RMS Noise in V
REF
Typical Output RMS Noise in V
GAIN = 2
1.9
2.4
45
250
16
16
13
10
2.2
3.1
50
280
16
16
13
10
GAIN = 2
GAIN = 2
GAIN = 2
of +2.5 V. These numbers are typical
GAIN = 32
16
16
13
10
GAIN = 32
0.9
1.0
3.9
18
GAIN = 32
15
15
13
10
GAIN = 32
0.6
0.6
3.0
18
0.52
0.62
1.6
5.5
GAIN = 128
14
13
12
10
GAIN = 128
0.9
1.0
2.1
6
GAIN = 128
13
13
12
10
GAIN = 128
REV. C