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Low-Power, 8-Channel, Serial 10-Bit ADC

See MAX1248 and MAX148 for 3V Applications

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 8
Conv. Rate (ksps) (max) 133
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 5
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 0.5
Package/Pins PDIP/20
SOIC (W)/20
SSOP/20
Budgetary
Price (See Notes)
5.15
View Less

Simplified Block Diagram

Technical Docs

Data Sheet Low-Power, 8-Channel, Serial 10-Bit ADC Apr 01, 1997

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Sampling:
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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 8
Conv. Rate (ksps) (max) 133
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 5
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 0.5
Package/Pins PDIP/20
SOIC (W)/20
SSOP/20
Budgetary
Price (See Notes)
5.15

Key Features

  • 8-Channel Single-Ended or 4-Channel Differential Inputs
  • Single +5V Operation
  • Low Power:
    • 1.5mA (operating)
    • 2µA (power-down)
  • Internal Track/Hold, 133kHz Sampling Rate
  • Internal 4.096V Reference
  • 4-Wire Serial Interface is Compatible with SPI, QSPI, MICROWIRE, and TMS320
  • 20-Pin DIP, SO, SSOP Packages
  • Pin-Compatible 12-Bit Upgrade (MAX186/MAX188)

Applications/Uses

  • Automotive Electronics
  • Battery Management
  • Battery-Powered Applications
  • Consumer Electronics
  • Medical Instruments
  • Pen-Entry Systems
  • Portable Data Logging
  • Robotics

Description

The MAX192 is a low-cost, 10-bit data-acquisition system that combines an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and ultra-low power consumption. The device operates with a single +5V supply. The analog inputs are software configurable for single-ended and differential (unipolar/bipolar) operation.

The 4-wire serial interface connects directly to SPI™, QSPI™, and MICROWIRE™ devices, without using external logic. A serial strobe output allows direct connection to TMS320 family digital signal processors. The MAX192 uses either the internal clock or an external serial-interface clock to perform successive approximation A/D conversions. The serial interface can operate beyond 4MHz when the internal clock is used. The MAX192 has an internal 4.096V reference with a drift of ±30ppm typical. A reference-buffer amplifier simplifies gain trim and two sub-LSBs reduce quantization errors.

The MAX192 provides a hardwired active-low SHDN pin and two software-selectable power-down modes. Accessing the serial interface automatically powers up the device, and the quick turn-on time allows the MAX192 to be shut down between conversions. By powering down between conversions, supply current can be cut to under 10µA at reduced sampling rates.

The MAX192 is available in 20-pin DIP and SO packages, and in a shrink-small-outline package (SSOP) that occupies 30% less area than an 8-pin DIP. The data format provides hardware and software compatibility with the MAX186/MAX188. For anti-aliasing filters, consult the data sheets for the MAX291-MAX297.

Simplified Block Diagram

MAX192: Typical Operating Circuit MAX192: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Low-Power, 8-Channel, Serial 10-Bit ADC Apr 01, 1997

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.