EVAL-AD5142DBZ View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

EVAL-AD5142DBZ

Dual Channel, 128-/256-Position, SPI, Nonvolatile Digital Potentiometer

Analog Devices

'EVAL-AD5142DBZ' PDF : 32 Pages View PDF

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AD5122/AD5142
1.2
VLOGIC = 1.8V
VLOGIC = 2.3V
VLOGIC = 3.3V
1.0
VLOGIC = 5V
VLOGIC = 5.5V
0.8
0.6
0.4
0.2
0
0
1
2
3
4
5
INPUT VOLTAGE (V)
Figure 20. ILOGIC Current vs. Digital Input Voltage
0
0x80 (0x40)
–10 0x40 (0x20)
0x20 (0x10)
–20
0x10 (0x08)
0x8 (0x04)
–30
0x4 (0x02)
0x2 (0x01)
–40 0x1 (0x00)
0x00
–50
AD5142 (AD5122)
–60
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 21. 10 kΩ Gain vs. Frequency vs. Code
–40
VDD/VSS = ±2.5V
VA = 1V rms
–50
VB = GND
CODE = HALF SCALE
NOISE FILTER = 22kHz
–60
10kΩ
100kΩ
–70
–80
–90
–100
20
200
2k
20k
FREQUENCY (Hz)
200k
Figure 22. Total Harmonic Distortion Plus Noise (THD + N) vs. Frequency
Data Sheet
20
VDD/VSS = ±2.5V
RAB = 10kΩ
0
–20
–40
–60
–80
QUARTER SCALE
MIDSCALE
–100
FULL-SCALE
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 23. Normalized Phase Flatness vs. Frequency, RAB = 10 kΩ
10
0
0x80 (0x40)
–10 0x40 (0x20)
0x20 (0x10)
–20 0x10 (0x08)
0x8 (0x04)
–30 0x4 (0x02)
0x2 (0x01)
–40 0x1 (0x00)
–50
0x00
–60
–70
–80
AD5142 (AD5122)
–90
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 24. 100 kΩ Gain vs. Frequency vs. Code
0
10kΩ
100kΩ
–10
–20
–30
–40
–50
–60
–70
VDD/VSS = ±2.5V
–80
fIN = 1kHz
CODE = HALF SCALE
NOISE FILTER = 22kHz
–90
0.001
0.01
0.1
1
VOLTAGE (V rms)
Figure 25. Total Harmonic Distortion Plus Noise (THD + N) vs. Amplitude
Rev. C | Page 16 of 32

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