4-Channel, 10-/12-Bit System Monitoring ADCS with Programmable Trip Thresholds and SMBus Alert Response are I2C Compatible
SUNNYVALE, CA-August 26, 2004-Maxim Integrated Products (NASDAQ: MXIM) announces the MAX1361-MAX1364. These 4-channel, 10- and 12-bit ADCs interface directly to I2C-compatible devices at speeds up to 1.7MHz. Six available I2C addresses allow multiple MAX1361-MAX1364 devices on a single I2C bus. Ideal for system-monitoring applications such as servers and power supplies, these ADCs free up the I2C bus by automatically monitoring input channels without µC (I2C master) interaction. This technique frees up bandwidth to other devices on the I2C bus. Additionally, with I2C bandwidth limitations removed, the MAX1361-MAX1364 increase the maximum sampling rate in monitoring mode from 94.4ksps (the rate for MAXIM's prior 10-/12-bit I2C ADCs) to 150ksps.
The 10-bit MAX1361/MAX1362 and 12-bit MAX1363/MAX1364 combine a 4-channel MUX, internal reference, FIFO, and programmable trip thresholds with digital comparator and channel sequencer in a 10-pin µMAX® package. The MAX1361/MAX1363 operate on a 3V supply and sample at up to 150ksps (436µA) in monitoring mode. The 12-bit MAX1362/MAX1364 operate on a 5V supply and sample at up to 133ksps (436µA) in monitoring mode. These 10-/12-bit ADCs consume 670µA at 94.4ksps while reading conversions over the I2C bus.
An SMBus® Alert Response feature on all the new ADCs quickly identifies the alarming device on a shared interrupt. During an alarm condition, the µC may send out an SMBus Alert, after which an alarming device responds with its slave address pending SMBus arbitration rules.
The full-scale analog-input voltage is determined by an internal reference at 2.048V and 4.096V for the 3V and 5V parts, respectively, or by using an external reference in the 1V to VDD range.
The MAX1361-MAX1364 are available in 10-µMAX packages in the extended (-40°C to +85°C) temperature range. Prices start at $2.79 (1000 up, FOB USA).
Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
SMBus is a trademark of Intel Corporation.
µMAX is a trademark of Maxim Integrated Products, Inc.
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