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MAX5489

更新时间： 2024-11-09 05:00:11
品牌 Logo 应用领域
美信 - MAXIM 电位器
页数 文件大小 规格书
14页 420K
描述
Dual, 256-Tap, Nonvolatile, SPI-Interface, Linear-Taper Digital Potentiometers

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MAX5489 数据手册

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19-3478; Rev 1; 1/05  
Dual, 256-Tap, Nonvolatile, SPI-Interface,  
Linear-Taper Digital Potentiometers  
General Description  
Features  
The MAX5487/MAX5488/MAX5489 dual, linear-taper,  
digital potentiometers function as mechanical poten-  
tiometers with a simple 3-wire SPI™-compatible digital  
interface that programs the wipers to any one of 256  
tap positions. These digital potentiometers feature a  
nonvolatile memory (EEPROM) to return the wipers to  
their previously stored positions upon power-up.  
ꢀ Wiper Position Stored in Nonvolatile Memory  
(EEPROM) and Recalled Upon Power-Up or  
Recalled by an Interface Command  
ꢀ 3mm x 3mm x 0.8mm Thin QFN Package  
ꢀ ±± ꢀSꢁ INꢀL ±0.ꢂ ꢀSꢁ BNꢀ (ꢃoltage-Bivider Mode)  
ꢀ 2ꢂ6 Tap Positions  
The MAX5487 has an end-to-end resistance of 10kΩ,  
while the MAX5488 and MAX5489 have resistances of  
50kΩ and 100kΩ, respectively. These devices have a  
low 35ppm/°C end-to-end temperature coefficient, and  
operate from a single +2.7V to +5.25V supply.  
ꢀ 3ꢂppm/°C End-to-End Resistance Temperature  
Coefficient  
ꢀ ꢂppm/°C Ratiometric Temperature Coefficient  
ꢀ ±0kΩL ꢂ0kΩL and ±00kΩ End-to-End Resistance  
The MAX5487/MAX5488/MAX5489 are available in a  
16-pin 3mm x 3mm x 0.8mm thin QFN package. Each  
device is guaranteed over the extended -40°C to +85°C  
temperature range.  
ꢃalues  
ꢀ SPI-Compatible Serial Interface  
ꢀ Reliability  
Applications  
200L000 Wiper Store Cycles  
ꢂ0-Year Wiper Bata Retention  
LCD Screen Adjustment  
Audio Volume Control  
ꢀ +2.7ꢃ to +ꢂ.2ꢂꢃ Single-Supply Operation  
Mechanical Potentiometer Replacement  
Low-Drift Programmable Filters  
Low-Drift Programmable-Gain Amplifiers  
SPI is a trademark of Motorola, Inc.  
Ordering Information/Selector Guide  
END-TO-END  
RESISTANCE (kΩ)  
PART  
TEMP RANGE  
PIN-PACKAGE  
TOP MARK  
MAX5487ETE*  
MAX5488ETE  
MAX5489ETE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
16 Thin QFN-EP**  
16 Thin QFN-EP**  
16 Thin QFN-EP**  
10  
50  
ABR  
ABS  
ABT  
100  
*Future product—contact factory for availability.  
**EP = Exposed pad.  
Functional Diagram  
Pin Configuration  
TOP VIEW  
HA  
V
DD  
16  
15  
14  
13  
8
256  
8-BIT  
GND  
DECODER  
POR  
WA  
LATCH  
V
HB  
1
2
3
4
12  
11  
10  
9
DD  
SCLK  
DIN  
CS  
SCLK  
DIN  
CS  
WB  
LB  
SPI  
INTERFACE  
LA  
MAX5487  
MAX5488  
MAX5489  
16-BIT  
NV RAM  
HB  
N.C.  
256  
8
8-BIT  
LATCH  
WB  
LB  
DECODER  
5
6
7
8
MAX5487  
MAX5488  
MAX5489  
THIN QFN  
3mm × 3mm  
EXPOSED PAD CONNECTED TO GND.  
________________________________________________________________ Maxim Integrated Products  
±
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...14

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