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MAX6691MUB+T

更新时间： 2024-09-16 13:10:59
品牌 Logo 应用领域
美信 - MAXIM 转换器
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19-2304; Rev 0; 1/02  
Four-Channel Thermistor Temperature-to-Pulse-  
Width Converter  
General Description  
Features  
The MAX6691 four-channel thermistor temperature-to-  
pulse-width converter measures the temperatures of up  
to four thermistors and converts them to a series of out-  
put pulses whose widths are related to the thermistors’  
temperatures. Each of the four thermistors and an  
o Simple Single-Wire Interface  
o Measures Up to Four Thermistor Temperatures  
o Low-Average Thermistor Current Minimizes Self-  
Heating Errors  
external fixed resistor (R  
) form a voltage-divider that  
EXT  
o Internal Voltage Reference Isolates Thermistor  
is driven by the MAX6691’s internal voltage reference  
(V ). V and the voltage across R are mea-  
from Power-Supply Noise  
REF  
REF  
EXT  
o Accommodates Any Thermistor Temperature  
sured and converted to a pulse.  
Range  
The MAX6691 has a single open-drain I/O pin that can  
be readily connected to a variety of microcontrollers.  
The microcontroller initiates a conversion by pulling the  
I/O pin low and releasing it. When conversion is done,  
the MAX6691 signals the end of conversion by pulling  
the I/O pin low once again. The pulse corresponding to  
the first thermistor is sent immediately after the release  
of the I/O pin.  
The on-chip power-management circuitry reduces the  
average thermistor current to minimize errors due to  
thermistor self-heating. Between conversions, the  
MAX6691 falls into a 10µA (max) sleep mode, where  
the voltage reference is disabled and the supply cur-  
rent is at its minimum.  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX6691MUB  
-55 C to +125 C  
10 µMAX  
The MAX6691 is available in a 10-pin µMAX package  
and is specified from -55°C to +125°C temperature  
range.  
Applications  
HVAC  
Home Appliances  
Medical Devices  
Typical Application Circuit  
Pin Configuration  
V
CC  
TOP VIEW  
TOP VIEW  
10kΩ  
V
CC  
T1  
T2  
1
2
3
4
5
10  
9
T1  
T2  
T3  
T4  
R-  
1
2
3
4
5
10  
9
V
CC  
I/O  
MICRO-  
CONTROLLER  
I/O  
T1  
T3  
T4  
MAX6691  
8
N.C.  
GND  
8
N.C.  
GND  
R+  
T2  
MAX6691  
7
7
T3  
R-  
R+  
6
6
T4  
R
EXT  
µMAX  
________________________________________________________________ Maxim Integrated Products  
1
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

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MAX6691MUB+T 替代型号

型号 品牌 替代类型 描述 数据表
MAX6691MUB+ MAXIM

类似代替

 Analog Circuit, 1 Func, BICMOS, PDSO10, MICRO MAX PACKAGE-10

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