MAX5489 Maxim Integrated Products, MAX5489 Datasheet - Page 12

• Manufacturer Part Number: MAX5489
• Description: (MAX5487 - MAX5489) Linear-Taper Digital Potentiometers
• Manufacturer: Maxim Integrated Products

Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
Figure 7. Adjustable Voltage Reference
Figure 8. Offset Voltage and Gain Adjustment
12
______________________________________________________________________________________
R2
HB
LB
MAX6160
3
2
GND
5V
IN
7
5V
MAX410
WB
4
1/2 MAX5487/MAX5488/MAX5489
1
OUT
ADJ
HA
R1
8
WA
WA
R
1/2 MAX5487/MAX5488/MAX5489
R
WHERE R
AND = D DECIMAL VALUE OF WIPER CODE
HA
LA
2
= R
6
HL
LA
1/2 MAX5487
1/2 MAX5488
1/2 MAX5489
x D / 256
HL
= END-TO-END RESISTANCE
V OUT1
MAX6160
GND
IN
OUT
ADJ
WB
R
LB
HB
1/2 MAX5487
1/2 MAX5488
1/2 MAX5489
V
OUT2
V
V
V
OUT_
OUT_
OUT_
R
WHERE R
AND D = DECIMAL VALUE OF WIPER CODE
2
= R
= 1.23V x
= 1.23V x
= 1.23V x
HL
x D / 256
HL
= END-TO-END RESISTANCE
100kΩ
10kΩ
50kΩ
R
R
R
FOR THE MAX5487
FOR THE MAX5488
FOR THE MAX5489