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+2.7V to +5.25V, Low-Power, 10-Bit Serial ADCs in SO-8

Product Details

Key Features

Applications/Uses

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 1
Conv. Rate (ksps) (max) 73
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 2.5
INL (±LSB) 0.5
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
4.45
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 1
Conv. Rate (ksps) (max) 73
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 2.5
INL (±LSB) 0.5
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
4.45

Key Features

  • +2.7V to +5.25V Single-Supply Operation
  • 10-Bit Resolution
  • Internal 2.5V Reference (MAX1242)
  • Small Footprint: 8-Pin PDIP and SO Packages
  • Low Power:
    • 3.7mW (73ksps, MAX1242)
    • 3mW (73ksps, MAX1243)
    • 66µW (1ksps, MAX1243)
    • 5µW (Power-Down Mode)
  • Internal Track/Hold
  • SPI/QSPI/MICROWIRE 3-Wire Serial Interface
  • Pin-Compatible 12-Bit Upgrades: MAX1240/MAX1241

Applications/Uses

  • Isolated Data Acquisition
  • Portable Data Logging
  • Process Control Monitoring
  • Temperature Measurement
  • Test Equipment

Description

The MAX1242/MAX1243 are low-power, 10-bit analog-to-digital converters (ADCs) available in 8-pin packages. They operate with a single +2.7V to +5.25V supply and feature a 7.5µs successive-approximation ADC, a fast track/hold (1.5µs), an on-chip clock, and a high-speed, 3-wire serial interface.

Power consumption is only 3mW (VDD = 3V) at the 73ksps maximum sampling speed. A 2µA shutdown mode reduces power at slower throughput rates.

The MAX1242 has an internal 2.5V reference, while the MAX1243 requires an external reference. The MAX1243 accepts signals from 0V to VREF, and the reference input range includes the positive supply rail. An external clock accesses data from the 3-wire interface, which connects directly to standard microcontroller I/O ports. The interface is compatible with SPI, QSPI, and MICROWIRE®.

Excellent AC characteristics and very low power combined with ease of use and small package size make these converters ideal for remote-sensor and data-acquisition applications, or for other circuits with demanding power consumption and space requirements. The MAX1242/MAX1243 are available in 8-pin PDIP and SO packages.

Simplified Block Diagram

MAX1242, MAX1243: Functional Diagram MAX1242, MAX1243: Functional Diagram Zoom icon

Technical Docs

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 .