MAX194

14-Bit, 85ksps ADC with 10µA Shutdown


Description

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 VREF) or bipolar (-VREF to VREF) 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 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 VREF) and Bipolar (-VREF to VREF) 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
Part Number Resolution
(bits)
Input Chan. Conv. Rate
(ksps)
ADC Architecture Data Bus Diff/S.E. Input External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SINAD
(dB)
Budgetary
Price
ADC max max max max See Notes
MAX194  14 1 85 SAR SPI S.E. Only 5 5 2.5 82 $17.85 @1k
See All Precision ADCs (< 5Msps) (466)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX194EVC16: Evaluation Kit for the MAX194 and MAX195
MAX194EVKIT: Evaluation Kit for the MAX194 and MAX195
MAX195EVC16: Evaluation Kit for the MAX194 and MAX195
MAX195EVKIT: Evaluation Kit for the MAX194 and MAX195

Technical Documents

App Note 572 Interfacing the MAX195 ADC to the TMS320C3X Evaluation Module

Quality and Environmental Data

Request Reliability Report for: MAX194 
Lead-Free Package Tin (Sn) Whisker Reports
 

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