14-Bit, 85ksps ADC with 10µA Shutdown

 

Part Number	Replacement	Explanation

Description

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The MAX194 is a 14-bit successive-approximation analog-to-digital converter (ADC) that combines high speed, high accuracy, low power consumption, and a 10µA shutdown mode. Internal calibration circuitry corrects linearity and offset errors to maintain the full rated performance over the operating temperature range without external adjustments. The capacitive-DAC architecture provides an inherent 85ksps track/hold function.

The MAX194, with an external reference (up to +5V), offers a unipolar (0V to V_REF) or bipolar (-V_REF to V_REF) pin-selectable input range. Separate analog and digital supplies minimize digital-noise coupling.

The chip select (active-low CS) input controls the three-state serial-data output. The output can be read either during conversion as the bits are determined, or following conversion at up to 5Mbps using the serial clock (SCLK). The end-of-conversion (active-low EOC) output can be used to interrupt a processor, or can be connected directly to the convert input (active-low CONV) for continuous, full-speed conversions.

The MAX194 is available in 16-pin DIP, wide SO, and ceramic sidebraze packages. The output data format provides pin-for-pin and functional compatibility with the 16-bit MAX195 ADC.

MAX194: Functional Diagram Enlarge+

Key Features

• True 14-Bit Accuracy:
  • 1/2LSB INL
  • 82dB SINAD
• 9.4µs Conversion Time
• 10µA Shutdown Mode
• Built-In Track/Hold
• AC and DC Specified
• Unipolar (0V to V_REF) and Bipolar (-V_REF to V_REF) Input Range
• Three-State Serial-Data Output
• Small 16-Pin DIP, SO, and Ceramic SB Packages
• Pin-Compatible 16-Bit Upgrade (MAX195)

Applications/Uses

• Audio
• Digital Signal Processing (DSP)
• Industrial Controls
• Medical Signal Acquisition
• Multiple Transducer Measurements
• Portable Instrumentation
• Robotics
• Vibration Analysis