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AD5124 Datasheet(PDF) 19 Page - Analog Devices

Part # AD5124
Description  Quad Channel, 128-/256-Position, I2C/SPI, Nonvolatile Digital Potentiometer
PDF  36 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5124 Datasheet(HTML) 19 Page - Analog Devices

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Data Sheet
AD5124/AD5144/AD5144A
Rev. B | Page 19 of 36
0
0.2
0.4
0.6
0.8
1.0
1.2
0
1
2
3
4
5
DIGITAL INPUT VOLATGE (V)
I2C, VLOGIC = 1.8V
I2C, VLOGIC = 2.3V
I2C, VLOGIC = 3.3V
I2C, VLOGIC = 5V
I2C, VLOGIC = 5.5V
SPI, VLOGIC = 1.8V
SPI, VLOGIC = 2.3V
SPI, VLOGIC = 3.3V
SPI, VLOGIC = 5V
SPI, VLOGIC = 5.5V
Figure 24. ILOGIC Current vs. Digital Input Voltage
–60
–50
–40
–30
–20
–10
0
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
AD5144/AD5144A (AD5124)
0x80 (0x40)
0x40 (0x20)
0x20 (0x10)
0x10 (0x08)
0x8 (0x04)
0x4 (0x02)
0x2 (0x01)
0x1 (0x00)
0x00
Figure 25. 10 kΩ Gain vs. Frequency vs. Code
–100
–90
–80
–70
–60
–50
–40
20
200
2k
20k
200k
FREQUENCY (Hz)
10k
Ω
100k
Ω
VDD/VSS = ±2.5V
VA = 1V rms
VB = GND
CODE = HALF SCALE
NOISE FILTER = 22kHz
Figure 26. Total Harmonic Distortion Plus Noise (THD + N) vs. Frequency
–100
–80
–60
–40
–20
0
20
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
QUARTER SCALE
MIDSCALE
FULL-SCALE
VDD/VSS = ±2.5V
RAB = 10kΩ
Figure 27. Normalized Phase Flatness vs. Frequency, RAB = 10 kΩ
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
0x80 (0x40)
0x40 (0x20)
0x20 (0x10)
0x10 (0x08)
0x8 (0x04)
0x4 (0x02)
0x2 (0x01)
0x1 (0x00)
0x00
AD5144/AD5144A (AD5124)
Figure 28. 100 kΩ Gain vs. Frequency vs. Code
10k
Ω
100k
Ω
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.001
0.01
0.1
1
VOLTAGE (V rms)
VDD/VSS = ±2.5V
fIN = 1kHz
CODE = HALF SCALE
NOISE FILTER = 22kHz
Figure 29. Total Harmonic Distortion Plus Noise (THD + N) vs. Amplitude



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