MAX5483ETE+T Maxim Integrated Products, MAX5483ETE+T Datasheet - Page 13

• Manufacturer Part Number: MAX5483ETE+T
• Description: IC POT DGTL 10BIT NV 16-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX5483ETE+T

• Taps: 1024
• Resistance (ohms): 10K
• Number Of Circuits: 1
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.25 V, ±2.5 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Resistance In Ohms: 10K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Resistance from W to H vs. Code (10k Ω Voltage-Divider)
where D is the decimal equivalent of the 10 data bits writ-
ten (0 to 1023), V
H and L terminals:
The MAX5481 includes a total end-to-end resistance
value of 10kΩ while the MAX5482 features an end-to-
end resistance value of 50kΩ. These devices are not
intended to be used as a variable resistor. Wiper cur-
rent creates a nonlinear voltage drop in series with the
wiper. To ensure temperature drift remains within speci-
fications, do not pull current through the voltage-divider
wiper. Connect the wiper to a high-impedance node.
Figures 1 and 2 show the behavior of the MAX5481’s
resistance from W to H and from W to L. This does not
apply to the variable-resistor devices
The MAX5483/MAX5484 provide a programmable
resistance between W and L. The MAX5483 features a
total end-to-end resistance value of 10kΩ, while the
MAX5484 provides an end-to-end resistance value of
50kΩ. The programmable resolution of this resistance is
equal to the nominal end-to-end resistance divided by
1024 (10-bit resolution). For example, each nominal
segment resistance is 9.8Ω and 48.8Ω for the MAX5483
and the MAX5484, respectively.
MAX5483/MAX5484 Variable Resistors
18
16
14
12
10
8
6
4
2
0
50kΩ DEVICE SCALES BY A FACTOR OF FIVE
0
V
V
FSE
ZSE
HL
128
______________________________________________________________________________________
is the voltage difference between the
10-Bit, Nonvolatile, Linear-Taper Digital
=
=
256 384
FSE
ZSE
CODE (DECIMAL)
⎡
⎢
⎣
⎡
⎢
⎣
1024
1024
V
V
512 640
HL
HL
⎤
⎥
⎦
⎤
⎥
⎦
,
and
768
896
1024
The 10-bit data in the 10-bit latch register selects a
wiper position from the 1024 possible positions, result-
ing in 1024 values for the resistance from W to L.
Calculate the resistance from W to L (R
following formula:
where D is decimal equivalent of the 10 data bits writ-
ten, R
is the zero-scale error. Table 1 shows the values of R
at selected codes for the MAX5483/MAX5484.
Configure the MAX5481–MAX5484 by a pin-selectable,
3-wire, SPI-compatible serial data interface or an
up/down interface. Drive SPI/UD high to select the 3-
wire SPI-compatible interface. Pull SPI/UD low to select
the up/down interface.
Figure 2. Resistance from W to L vs. Code (10k Ω Voltage-Divider)
Table 1. R
(DECIMAL)
CODE
1023
512
W-L
0
1
is the nominal end-to-end resistance, and R
18
16
14
12
10
8
6
4
2
0
WL
R
0
50kΩ DEVICE SCALES BY A FACTOR OF FIVE
WL
(10kΩ DEVICE)
128
Potentiometers
at Selected Codes
( ) =
D
MAX5483
R
256 384
10,070
WL
5070
70
80
1023
CODE (DECIMAL)
D
(Ω)
512 640
×
Digital Interface
R
W L
−
768
+
R
(50kΩ DEVICE)
WL
Z
896
MAX5484
R
) by using the
25,110
50,110
WL
1024
110
160
(Ω)
WL
13
Z