Maxim : Data acquisition IC suits portable applications

Maxim Integrated Products introduces the MAX1329, a low-power data-acquisition system (DAS) that integrates precision data converters for signal conditioning and sensor excitation. The MAX1329 features a 12-/16-bit analog-to-digital converter (ADC), dual 12-bit force-sense digital-to-analog converters (DACs), and voltage references. The 12-bit ADC's fast 300ksps conversion rate is ideal for profiling fast-decaying transient signals, such as those from a blood glucose sensor. For greater resolution, internal dithering and digital signal processing extend the ADC's natural 12-bit resolution to 16-bits. High-accuracy, internal 12-bit DACs (±2 LSB INL, ±1 DNL) with fast 10microsecond (max) settling times are also included for sensor excitation. These features support the intelligent microcontroller interface's seamless connection to a low-cost microcontroller, which completes the high-performance closed-looped system used in applications such as battery-powered/portable devices and data-acquisition systems.

In addition to the ADC, DACs, and references, the MAX1329 integrates analog support blocks ideal for portable DASs. These analog blocks include operational amplifiers, a 16:1 input multiplexer, a programmable-gain amplifier (PGA), and low-leakage single-pole/double-throw (SPDT) and single-pole/single-throw (SPST) solid-state switches. The 1V/V to 8V/V PGA provides a wide, dynamic measurement range to measure low-level signals. An integrated oscillator provides a 32kHz clock for timekeeping, and a configurable frequency-locked loop (FLL) generates the high-speed clock necessary for driving a host microcontroller. Other support features include dual voltage monitors, temperature measurement (internal and external temperature sensors), user-programmable general-purpose I/Os that can be used to output system interrupts, control switches, and drive shutdown. The high integration of this device simplifies the design process, saves board space, and offers designers much greater flexibility in their selection of microcontrollers.

Optimized for battery-powered applications, the MAX1329 operates from a +1.8V to +3.6V digital supply and a +2.7V to +5.5V analog supply. Additionally, an on-chip charge pump provides a +5V supply up to 25mA to power other circuitry. With all of the analog blocks enabled, the MAX1329 has a quiescent supply current of 3.75mA (typ). This drops to 0.5microamps (typ) in shutdown mode.

The MAX1329 is specified for the extended temperature range (-40 degrees Celsius to +85 degrees Celsius) and is available in a 6mm x 6mm, 40-pin TQFN package. Prices start at $7.49 (1000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company reported revenue in excess of $2 billion for fiscal 2008. Maxim was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 5900 products serving the industrial, communications, consumer, and computing markets.

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A Data Sheet for this product is available at :

Drew Ehrlich
Senior Public Relations Specialist
Maxim Integrated Products
Phone: 408-331-4252
Fax: 408-331-4132

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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