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MAX5527/MAX5528/MAX5529
Detailed Description
The MAX5527/MAX5528/MAX5529 100k
/50k/10k
end-to-end resistance digitally-controlled potentiome-
ters offer 64 wiper tap positions accessible along the
resistor array between H and L. These devices function
as potentiometers or variable resistors (see Figure 1).
The wiper (W) position is adjusted sequentially through
the tap positions using a simple 2-wire up/down inter-
face. These digital potentiometers provide an optional
one-time programmable feature that sets and locks the
power-on reset position of the wiper (see the
PV One-
Time Programming section). Once the desired wiper
position is programmed, the 2-wire interface can be
disabled to prevent unwanted adjustment.
Digital Interface Operation
The MAX5527/MAX5528/MAX5529 provide two modes
of operation when the serial interface is active: incre-
ment mode or decrement mode. The serial interface is
only active when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. Set U/D high to increment the
MAX5527/MAX5528/MAX5529 when CS transitions
from high to low (Figure 2). Set U/D low to decrement
the MAX5527/MAX5528/MAX5529 when CS transitions
high to low (Figure 3). Once CS is held low, each low-
to-high transition at U/D increments or decrements the
wiper one position. Once the increment or decrement
mode is set, the device remains in that mode until CS
goes high.
Idle U/D high for normal operation. If U/D is low when
CS transitions low to high, the wiper moves one addi-
tional tap in its present direction. The wiper remains in
the same position when U/D is high and CS transitions
low to high. After CS returns high, the wiper position
remains the same (Figure 4).
Additional increments do not change the wiper position
when the wiper is at the maximum end of the resistor
array. Additional decrements do not change the wiper
position when the wiper is at the minimum end of the
resistor array.
H
L
H
L
W
POTENTIOMETER
CONFIGURATION
VARIABLE-RESISTOR
CONFIGURATION
W
Figure 1. Potentiometer/Variable-Resistor Configuration
Pin Description
PIN
NAME
FUNCTION
1
W
Wiper Connection
2
CS
Chip-Select Input. A high-to-low CS transition determines the increment/decrement mode. Increment
if U/D is high, or decrement if U/D is low. CS is also used for one-time programming. See the PV One-
Time Programming section.
3VDD
Supply Voltage. Bypass with a 0.1F capacitor to GND.
4
GND
Ground
5PV
One-Time Programming Voltage. Connect PV to an 11V supply at the time the device is
programmed/locked, and bypass with a 22F capacitor to GND. For normal operation, connect to
GND or leave floating.
6U/D
Up/Down Control Input. When CS is low, a low-to-high transition at U/D increments or decrements the
wiper position. See the Digital Interface Operation section.
7
L
Resistor Low Terminal
8
H
Resistor High Terminal
—EP
Exposed Pad (TDFN Only). Internally connected to GND. Connect to a large ground plane to
maximize thermal dissipation.
One-Time Programmable, Linear-Taper Digital
Potentiometers
_______________________________________________________________________________________
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5528GTA | 制造商:Maxim Integrated Products 功能描述:ONE-TIME PROGRAMMABLE LINEAR-TAPER - Rail/Tube |
| MAX5528GTA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 64POS 50KOHM SGL 8TDFN EP - Rail/Tube |
| MAX5528GTA+T | 功能描述:數(shù)字電位計(jì) IC 64-Tap One-Time Programmable RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5528GTA-T | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5528GUA | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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