Datasheet

AD5270/AD5271 Data Sheet
Rev. F | Page 14 of 24
0
5
1
0
15
20
25
30
35
40
45
50
RHEOSTAT MODE TEMPCO (ppm/°C)
0 256 512
768
1023
0
64
128
192 255
AD5270
AD5271
CODE (Decimal)
08077-019
20kΩ
50kΩ
100kΩ
V
DD
/V
SS
= 5V/0V
Figure 25. Tempco ΔR
WA
/ΔT vs. Code
–60
–50
–
40
–
10
–30
–20
0
1k
10k
100k
1M 10M
GAIN (dB)
FREQUENCY (Hz)
0x200 (0x80)
0x100 (0x40)
0x080 (0x20)
0x040 (0x10)
0x020 (0x08)
0x010 (0x04)
0x008 (0x02)
0x004 (0x01)
0x002
0x001
08077-031
AD5270 (AD5271)
Figure 26. 20 kΩ Gain vs. Code vs. Frequency
–60
–50
–40
–10
–30
–20
0
1k
10k
100k 1M 10M
GAIN (dB)
FREQUENCY (Hz)
0x200 (0x80)
0x100 (0x40)
0x080 (0x20)
0x040 (0x10)
0x020 (0x08)
0x010 (0x04)
0x008 (0x02)
0x004 (0x01)
0x002
0x001
AD5270 (AD5271)
08077-032
Figure 27. 50 kΩ Gain vs. Code vs. Frequency
0
1
2
3
4
5
6
7
THEORETICAL I
WA_MAX
(mA)
CODE (Decimal)
0 256
51
2
76
8
10
23
0
64
12
8
192 255
AD
5
270
AD5271
V
D
D
/V
S
S
= 5
V
/0
V
20kΩ
50kΩ
100kΩ
08077-028
Figure 28. Theoretical Maximum Current vs. Code
–60
–70
–50
–40
–10
–30
–20
0
1k
10k
100k 1M 10M
GAIN (dB)
FREQUENCY (Hz)
0x200 (0x80)
0x100 (0x40)
0x080 (0x20)
0x040 (0x10)
0x020 (0x08)
0x010 (0x04)
0x008 (0x02)
0x004 (0x01)
0x002
0x001
AD5270 (AD5271)
08077-041
Figure 29. 100 kΩ Gain vs. Code vs. Frequency
PSRR (dB)
FREQUENCY (Hz)
100 1k 10k 100k
V
DD
/V
SS
= 5V/0V
CODE = HALF SCALE
0
–90
–80
–70
–60
–50
–40
–30
–20
–10
50kΩ
100kΩ
20kΩ
08077-024
Figure 30. PSRR vs. Frequency