MAX5391MATE+ Maxim Integrated Products, MAX5391MATE+ Datasheet - Page 12

• Manufacturer Part Number: MAX5391MATE+
• Description: IC POT DGTL DUAL 256TAP 16-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX5391MATE+

• Taps: 256
• Resistance (ohms): 50K
• Number Of Circuits: 2
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 1.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Resistance In Ohms: 50K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Figure 8 shows a variable-gain current-to-voltage con-
verter using a potentiometer as a variable resistor.
Figure 9 shows a positive LCD bias control circuit using
a potentiometer as a voltage-divider.
Figure 10 shows a programmable filter using a dual
potentiometer.
Figure 8. Variable Gain I-to-V Converter
Figure 10. Programmable Filter
12
Variable-Gain Current-to-Voltage Converter
_____________________________________________________________________________________
V
IN
I
S
HB
R3
R3
WB
WA
LB
V
HA
LA
W_
OUT
Programmable Filter
R2
= -I
S
x ((R3 x (1 + R2/R1)) + R2)
H_
LCD Bias Control
L_
R1
R1
R2
V
V
OUT
OUT
Figure 11 shows an offset voltage adjustment circuit
using a dual potentiometer.
PROCESS: BiCMOS
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 11. Offset Voltage Adjustment Circuit
Offset Voltage Adjustment Circuit
WB
+1.8V
V
H_
L_
IN
LB
HB
W_
Process Information
+1.8V
HA
WA
V
OUT
LA
V
OUT