MAX5405EUB-T Maxim Integrated Products, MAX5405EUB-T Datasheet - Page 9

• Manufacturer Part Number: MAX5405EUB-T
• Description: Digital Potentiometer ICs
• Manufacturer: Maxim Integrated Products

Specifications of MAX5405EUB-T

• Number Of Pots: Dual
• Taps Per Pot: 256
• Resistance: 100 KOhms
• Wiper Memory: Volatile
• Digital Interface: Serial (3-Wire, SPI)
• Operating Supply Voltage: 5 V
• Supply Current: 0.8 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Package / Case: uMAX-10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

In
shown with the MAX6160 to make an adjustable volt-
age reference. In this circuit, the H
MAX5403/MAX5404/MAX5405 is connected to the OUT
pin of the MAX6160, the L
MAX5404/MAX5405 is connected to GND, and the W
Figure 4. Serial Data Format
Figure 5. I to V Converter
Figure 6b. Adjustable Gain Circuit Using: 3-Terminal
Potentiometer
ADDRESS
First Bit In
Figure 7a, the MAX5403/MAX5404/MAX5405 is
B0 (A0)
(MSB)
L
B
B1 (D7)
Adjustable Voltage Reference
V
_______________________________________________________________________________________
V
IN
MAX5403
MAX5404
MAX5405
0
/ I
MAX5403
MAX5404
MAX5405
S
= R
R3
W
3
B
(1 + R
2
+5V
/R
B2 (D6)
X
1
) + R
H
B
pin of the MAX5403/
Digital Potentiometers in 10-µMAX
V
CC
2
W
MAX4250
R1
A
L
A
V
R2
0
X
B3 (D5)
V
OUT
pin of the
DATA WORD
X
B4 (D4)
Dual 256-Tap, Low-Drift,
pin of the MAX5403/MAX5404/MAX5405 is connected
to the ADJ pin of the MAX6160. The MAX5403/
MAX5404/MAX5405 allow precise setting of the voltage
reference output. A low 5ppm/°C ratiometric tempco
allows a very stable, adjustable voltage over tempera-
ture.
Figure 6a. Adjustable Gain Circuit Using: 2-Terminal Variable
Resistor
Figure 7a. Adjustable Voltage Reference Using: 3-Terminal
Potentiometer
MAX6160
+5V
GND
VIN
B5 (D3)
OUT
ADJ
W
B
L
W
B6 (D2)
A
A
H
L
B
B
V
V
V
V
WHERE C IS ANY CODE BEING WRITTEN TO A DEVICE.
O
O
O
O
REF
REF = 12.3kV
REF = 61.5kV
REF = 123kV
MAX5403
MAX5404
MAX5405
V
CC
✕
B7 (D1)
✕
✕
/ (100k
/ (100k
/ (50k
V
OUT
✕
✕
✕
C / 255) for MAX5404
C / 255) for MAX5405
C / 255) for MAX5403
Last Bit In
B8 (D0)
(LSB)
9