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+5V, 1Msps, 4 and 8-Channel, 8-Bit ADCs with 1µA Power-Down

Low-Power +5V 8-bit ADCs with Parallel Interface

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 1000
Data Bus µP/8
ADC Architecture Flash
Diff/S.E. Input S.E. Only
External VREF (V) (min) 0
External VREF (V) (max) 5
Unipolar VIN (V) (max) 5
Package/Pins PDIP/28
SSOP/28
Budgetary
Price (See Notes)
5.52
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 1000
Data Bus µP/8
ADC Architecture Flash
Diff/S.E. Input S.E. Only
External VREF (V) (min) 0
External VREF (V) (max) 5
Unipolar VIN (V) (max) 5
Package/Pins PDIP/28
SSOP/28
Budgetary
Price (See Notes)
5.52

Key Features

  • Single +5V Supply Operation
  • 4 (MAX114) or 8 (MAX118) Analog Input Channels
  • Low Power:
    • 40mW (operating mode)
    • 5µW (power-down mode)
  • Total Unadjusted Error <1LSB
  • Fast Conversion Time: 660ns per Channel
  • No External Clock Required
  • Internal Track/Hold
  • 1MHz Full-Power Bandwidth
  • Internally Connected 8th Channel Monitors Reference Voltage (MAX118)

Applications/Uses

  • Communication Systems
  • High-Speed DSP
  • Portable Equipment
  • Remote Data Acquisition

Description

The MAX114/MAX118 are microprocessor-compatible, 8-bit, 4-channel and 8-channel analog-to-digital converters (ADCs). They operate from a single +5V supply and use a half-flash technique to achieve a 660ns conversion time (1Msps). A power-down (active-low PWRDN) pin reduces current consumption typically to 1µA. The devices return from power-down mode to normal operating mode in less than 200ns, allowing large supply-current reductions in Burst Mode® applications (in Burst Mode, the ADC wakes up from a low-power state at specified intervals to sample the analog input signals). Both converters include a track/hold, enabling the ADC to digitize fast analog signals.

Microprocessor (µP) interfaces are simplified because the ADC can appear as a memory location or I/O port without external interface logic. The data outputs use latched, three-state buffer circuitry for direct connection to an 8-bit parallel µP data bus or system input port. The MAX114/MAX118 input/reference configuration enables ratiometric operation.

The 4-channel MAX114 is available in a 24-pin DIP or SSOP. The 8-channel MAX118 is available in a 28-pin DIP or SSOP. For +3V applications, refer to the MAX113/MAX117 data sheet.

Simplified Block Diagram

MAX114, MAX118: Functional Diagram MAX114, MAX118: 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 .