MAX5497ETE-T Maxim Integrated Products, MAX5497ETE-T Datasheet - Page 17

• Manufacturer Part Number: MAX5497ETE-T
• Description: Digital Potentiometer ICs
• Manufacturer: Maxim Integrated Products

Specifications of MAX5497ETE-T

• Number Of Pots: Dual
• Taps Per Pot: 1024
• Resistance: 50 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (3-Wire, SPI)
• Operating Supply Voltage: 5 V
• Supply Current: 1.5 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Package / Case: TQFN EP-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figures 12 and 13 show an application where the volt-
age-divider or variable resistor is used to make an
adjustable, positive LCD-bias voltage. The op amp pro-
vides buffering and gain to the resistor-divider network.
Figure 14 shows the configuration for a 1st-order pro-
grammable filter. The gain of the filter is adjusted by
R2, and the cutoff frequency is adjusted by R3. Use the
following equations to calculate the gain (G) and the
3dB cutoff frequency (f
Figure 12. Positive LCD Bias Control Using a Voltage-Divider
Figure 14. Programmable Filter
1/2 MAX5494/MAX5495
1/2 MAX5498/MAX5499
1/2 MAX5496–MAX5499
1/2 MAX5496–MAX5499
V
______________________________________________________________________________________
IN
H_
L_
5V
L_
L_
Positive LCD Bias Control
C
C
10-Bit, Dual, Nonvolatile, Linear-Taper
).
W_
R3
R2
W_
W_
Programmable Filter
MAX480
30V
R1
V
OUT
V
OUT
Figure 15 shows an application using the MAX5498/
MAX5499 to adjust the gain and nullify the offset voltage.
Figure 13. Positive LCD Bias Control Using a Variable Resistor
Figure 15. Gain- and Offset-Voltage Adjustment Circuit
Digital Potentiometers
1/2 MAX5496–MAX5499
1/2 MAX5498/MAX5499
1/2 MAX5498/MAX5499
Gain and Offset Voltage Adjustment
V
IN
f
C
L_
H_
L_
=
V
G
REF
2
L_
π
= +
1
×
W_
W_
W_
5V
R
1
R
R
3
2
1
×
MAX480
C
30V
V
OUT
V
OUT
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