Supervisory Circuits monitor power in portable devices.September 17, 2009 -
Models ADM6326 and ADM6346 microprocessor supervisory circuits feature active low push-pull reset output, while ADM6328/ADM6348 have active low open-drain output requiring external pull-up resistor. All models offer 500 nA supply current and provide reset output during powerup, powerdown, and brownout conditions. On power-up, internal timer holds reset for at least 100 ms, which keeps microprocessor in reset state until conditions stabilize. Units operate over -40 to +85°C temperature range.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Analog Devices, Inc.
1 Technology Way, P.O. Box 9106
Norwood, MA, 02062-9106
USA
Microprocessor Supervisory Circuits Reduce Power Requirements for Portable Consumer, Communications, and Industrial Appliances
- Analog Devices' new family of supervisory circuits lowers power to extend battery life in mobile applications.
NORWOOD, Mass. - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, today expanded its portfolio of supervisory ICs with new microprocessor supervisory circuits for monitoring under-voltage conditions in handheld industrial instruments, telecommunications devices, and other portable applications. The ADM6326, ADM6328, ADM6346 and ADM6348 supervisory circuits feature an ultra-low 500-nA supply current that can extend the battery life of mobile devices. The new circuits provide a low-power option for the precision monitoring of DSP, ASIC, FPGA and other processor power supplies to detect under-voltage conditions that can lead to system failure. The supervisory ICs monitor 2.5-V, 3-V, 3.3-V, and 5-V voltage rails. The ADM6326, ADM6328, ADM6346 and ADM6348 provide a reset output during power-up, power-down and brownout conditions. On power-up, an internal timer holds reset asserted for at least 100 ms, which effectively holds the microprocessor in a reset state until conditions have stabilized.
The ADM6326 and ADM6346 have an active low push-pull reset output. The ADM6328 and ADM6348 have an active low open-drain output, which requires an external pull-up resistor. The reset output remains operational with VCC as low as 1 V. The reset comparator features built-in glitch immunity, making it impervious to fast transient on VCC. Twenty-four reset threshold voltage options are available, in increments between 2.2 V and 4.63 V, making these devices suitable for monitoring a variety of supplies.
The ADM6326, ADM6328, ADM6346 and ADM6348 are available in a space saving 3-lead SOT-23 package and operate over the extended temperature range of -40°C to +85°C.
As part of a complete signal chain the ADM6326, ADM6328, ADM6346 and ADM6348 supervisory circuits are compatible with ADI's ADP2503 and ADP2504 dc-to-dc converters , ADP2121 switching regulator, and the ADP121 LDO.
Product Samples Availability Accuracy Temperature Range Price Each Per 1,000
ADM6326 Now Now ±2.5% over temp -40°C to +85°C $0.95
±1.5% at 25°C
Packaging
3-lead SOT-23
ADM6328 Now Now ±2.5% over temp, -40°C to +85°C $0.95
±1.5% at 25°C
Packaging
3-lead SOT-23
ADM6346 Now Now ±2.5% over temp, -40°C to +85°C $0.95
±1.5% at 25°C
Packaging
3-lead SOT-23
ADM6348 Now Now ±2.5% over temp, -40°C to +85°C $0.95
±1.5% at 25°C
Packaging
3-lead SOT-23
ADI in Power Management
Analog Devices brings world-class signal-processing prowess to a portfolio of innovative power-management ICs that complement high-performance signal-processing functions in a wide range of portable and fixed-power applications in consumer electronics, medical equipment, industrial and instrumentation, and communications infrastructure. By supporting signal-chain design requirements, such as dynamic range, transient performance, and reliability, ADI helps customers solve complex power challenges easily and quickly, differentiate their products, and get to market faster. Learn more about ADI's power-management ICs at http://www.analog.com/power.
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index. http://www.analog.com
Follow ADI: http://www.twitter.com/ADI_News.
Contacts
Analog Devices, Inc.
Howard Wisniowski, 781-937-1517
howard.wisniowski@analog.com
Source: Analog Devices, Inc.
Analog Devices, Inc. Corporate Communications Department, Three Technology Way, Norwood, MA 02062
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