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MAX1496

更新时间： 2024-09-29 14:57:55
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亚德诺 - ADI 驱动驱动器
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24页 907K
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3位半和4位半、单片ADC，带有LED驱动器

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MAX1496 数据手册

 浏览型号MAX1496的Datasheet PDF文件第2页浏览型号MAX1496的Datasheet PDF文件第3页浏览型号MAX1496的Datasheet PDF文件第4页浏览型号MAX1496的Datasheet PDF文件第5页浏览型号MAX1496的Datasheet PDF文件第6页浏览型号MAX1496的Datasheet PDF文件第7页 
19-3166; Rev 0; 1/04  
3.5- and 4.5-Digit, Single-Chip ADCs  
with LED Drivers  
General Description  
Features  
The MAX1447/MAX1496/MAX1498 low-power, 3.5- and  
4.5-digit, analog-to-digital converters (ADCs) with inte-  
grated light-emitting diode (LED) drivers operate from a  
single 2.7V to 5.25V power supply. They include an  
internal reference, a high-accuracy on-chip oscillator,  
and a multiplexed LED display driver. An internal charge  
pump generates the negative supply needed to power  
the integrated input buffers for single-supply operation.  
The ADC is configurable for either a ±2V or ±2±±mV  
input range and it outputs its conversion results to an  
LED. The MAX1496 is a 3.5-digit (±1999 count) device  
and the MAX1447/MAX1498 are 4.5-digit (±19,999  
count) devices.  
♦ High Resolution  
MAX1447/MAX1498: 4.5 Digits (±19ꢀ999 ꢁountꢂ  
MAX1496: 3.5 Digits (±1999 ꢁountꢂ  
♦ Sigma-Delta ADꢁ Architecture  
No Integrating ꢁapacitors Required  
No Autozeroing ꢁapacitors Required  
>100dB of Simultaneous 50Hz and 60Hz  
Rejection  
♦ Selectable Input Range of ±±00mꢃ or ±±ꢃ  
♦ Selectable ꢃoltage Reference: Internal ±.048ꢃ or  
External  
♦ Internal High-Accuracy Oscillator Needs No  
The MAX1447/MAX1496/MAX1498 do not require exter-  
nal precision integrating capacitors, autozero capaci-  
tors, crystal oscillators, charge pumps, or other circuitry  
required with dual-slope ADCs (commonly used in  
panel meter circuits).  
External ꢁomponents  
♦ Automatic Offset ꢁalibration  
♦ On-Demand Enhanced Offset ꢁalibration  
(MAX1447ꢂ  
♦ Operate from a Single ±.7ꢃ to 5.±5ꢃ Supply  
These devices also feature on-chip buffers for the dif-  
ferential signal and reference input, allowing direct  
interface with high-impedance signal sources. In addi-  
tion, they use continuous internal offset-calibration and  
offer >1±±dB rejection of 5±Hz and 6±Hz line noise.  
Other features include data hold and peak detection  
and overrange/underrange detection. The MAX1447  
features on-demand enhanced offset calibration for  
improved offset performance.  
♦ Low Power (Exclude LED-Driver ꢁurrentꢂ  
Maximum 744µA Operating ꢁurrent (MAX1496ꢂ  
Maximum 960µA Operating ꢁurrent  
(MAX1447/MAX1498ꢂ  
Maximum 3±5µA Shutdown ꢁurrent  
♦ Multiplexed ꢁommon-ꢁathode LED Drivers  
Resistor-Programmable Segment ꢁurrent  
♦ Small 3±-Pinꢀ 7mm x 7mm TQFP Package (4.5  
The MAX1447/MAX1498 are available in a 32-pin, 7mm  
✕ 7mm TQFP package and the MAX1496 is available in  
28-pin SSOP and 28-pin PDIP packages. All devices in  
this family operate over the -4±°C to +85°C extended  
temperature range.  
Digitsꢂꢀ ±8-Pin SSOP Package (3.5 Digitsꢂ  
♦ Also Available in a PDIP Package (3.5 Digitsꢂ  
Applications  
Digital Panel Meters  
Ordering Information  
PIN-  
RESOLUTION  
(DIGITSꢂ  
PART  
TEMP RANGE  
Hand-Held Meters  
PAꢁKAGE  
Digital Voltmeters  
MAX1447ECJ -4±°C to +85°C 32 TQFP  
MAX1496EAI* -4±°C to +85°C 28 SSOP  
4.5  
3.5  
3.5  
4.5  
Digital Multimeters  
MAX1496EPI  
-4±°C to +85°C 28 PDIP  
Pin Configurations appear at end of data sheet.  
MAX1498ECJ -4±°C to +85°C 32 TQFP  
*Future product—contact factory for availability.  
________________________________________________________________ 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...24

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