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ADS7886_14

更新时间： 2024-11-30 02:58:15
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德州仪器 - TI /
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17页 1258K
描述
12-Bit, 1-MSPS, MICRO-POWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTERS

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ADS7886_14 数据手册

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ADS7886  
SLAS492–SEPTEMBER 2005  
12-Bit, 1-MSPS, MICRO-POWER, MINIATURE  
SAR ANALOG-TO-DIGITAL CONVERTERS  
FEATURES  
APPLICATIONS  
•
•
•
Base Band Converters in Radio  
Communication  
Motor Current/Bus Voltage Sensors in Digital  
Drives  
Optical Networking (DWDM, MEMS Based  
Switching)  
•
•
•
•
•
•
1-MHz Sample Rate Serial Device  
12-Bit Resolution  
Zero Latency  
20-MHz Serial Interface  
Supply Range: 2.35 V to 5.25 V  
Typical Power Dissipation at 1 MSPS:  
– 3.9 mW at 3-V VDD  
•
•
•
•
•
Optical Sensors  
Battery Powered Systems  
Medical Instrumentations  
High-Speed Data Acquisition Systems  
High-Speed Closed-Loop Systems  
– 7.5 mW at 5-V VDD  
•
•
INL ±1.25 LSB Maximum, ±0.65 LSB (Typical)  
DNL ±1 LSB Maximum, +0.4 / -0.65 LSB  
(Typical)  
•
Typical AC Performance:  
72.25 dB SINAD, -84 dB THD  
•
•
•
•
Unipolar Input Range: 0 V to VDD  
Power Down Current: 1 µA  
Wide Input Bandwidth: 15 MHz at 3 dB  
6-Pin SOT23 and SC70 Packages  
DESCRIPTION  
The ADS7886 is a 12-bit, 1-MSPS analog-to-digital converter (ADC). The device includes a capacitor based SAR  
A/D converter with inherent sample and hold. The serial interface in each device is controlled by the CS and  
SCLK signals for glueless connections with microprocessors and DSPs. The input signal is sampled with the  
falling edge of CS, and SCLK is used for conversion and serial data output.  
The device operates from a wide supply range from 2.35 V to 5.25 V. The low power consumption of the device  
makes it suitable for battery-powered applications. The device also includes a powerdown feature for power  
saving at lower conversion speeds.  
The high level of the digital input to the device is not limited to device VDD. This means the digital input can go as  
high as 5.25 V when device supply is 2.35 V. This feature is useful when digital signals are coming from other  
circuit with different supply levels. Also this relaxes restriction on power up sequencing.  
The ADS7886 is available in 6-pin SOT23 and SC70 packages and is specified for operation from -40°C to  
125°C.  
Micro-Power Miniature SAR Converter Family  
BIT  
12-Bit  
< 300 KSPS  
ADS7866 (1.2 VDD to 3.6 VDD  
ADS7867 (1.2 VDD to 3.6 VDD  
ADS7868 (1.2 VDD to 3.6 VDD  
300 KSPS – 1.25 MSPS  
)
)
)
ADS7886 (2.35 VDD to 5.25 VDD  
ADS7887 (2.35 VDD to 5.25 VDD  
ADS7888 (2.35 VDD to 5.25 VDD  
)
)
)
10-Bit  
8-Bit  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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