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24-/16-Bit, 4-Channel, Simultaneous-Sampling, Cascadable, Sigma-Delta ADCs

Sigma-Delta ADCs Cascadable Up to 32 Simultaneous Channels

Product Details

The MAX11040K/MAX11060 are 24-/16-bit, 4-channel, simultaneous-sampling, sigma-delta analog-to-digital converters (ADCs). The devices allow simultaneous sampling of as many as 32 channels using a built-in cascade feature to synchronize as many as eight devices. The serial interface of the devices allows reading data from all the cascaded devices using a single command. Four modulators simultaneously convert each fully differential analog input with a programmable data output rate ranging from 0.25ksps to 64ksps. The devices achieve 106dB SNR at 16ksps and 117dB SNR at 1ksps (MAX11040K). The devices operate from a single +3V supply. The differential analog input range is ±2.2V when using the internal reference; an external reference is optional. Each input is overvoltage protected up to ±6V without damage. The devices use an internal crystal oscillator or an external source for clock.

The devices are compatible with SPI, QSPI™, MICROWIRE®, and DSP-compatible 4-wire serial interfaces. An on-board interface logic allows one serial interface (with a single chip select) to control up to eight cascaded devices or 32 simultaneous sampling analog input channels.

The devices are ideally suited for power-management systems. Each channel includes an adjustable sampling phase enabling internal compensation for phase shift due to external dividers, transformers, or filters at the inputs. The output data rate is adjustable with a 0.065% resolution (at 16ksps or below) to track the varying frequency of a periodic input. An active-low SYNC input allows periodic alignment of the conversion timing of multiple devices with a remote timing source.

The devices are available in a 38-pin TSSOP package specified over the -40°C to +105°C industrial temperature range.

Key Features

  • Feature Set Ideal for Energy Measurement Systems
    • Four Fully Differential Simultaneously Sampled Channels
    • Cascadable for Up to 32 Channels of Simultaneous Sampling
    • Programmable Sampling Phase for Phase Shift Compensation
      • 0 to 333µs in 1.33µs Steps
    • Programmable Output Data Rate with 0.065% Resolution
  • Excellent Performance for High-Accuracy Measurement Applications
    • 117dB SNR at 1ksps
    • 106dB SNR at 16ksps
    • 0.25% Error Over a 1000:1 Dynamic Range
    • ±2.2V Full-Scale Input Range
  • Single-Supply Operation and Protected Inputs for Design Simplicity and Robustness
    • 3.0V to 3.6V Analog Supply Voltage
    • 2.7V to VAVDD Digital Supply Voltage
    • ±6V Overvoltage Protected Inputs
    • -40°C to +105°C Operating Temperature Range

Applications/Uses

  • Industrial Data-Acquisition Systems
  • Medical Instrumentation
  • Multiphase Power Systems
  • Power-Protection Relay Equipment
Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 16
# Input Channels 4
Conv. Rate (ksps) (max) 64
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 2.3
External VREF (V) (max) 2.7
Bipolar VIN (±V) (max) 2.2
INL (±LSB) 1.5
Package/Pins TSSOP/38
Budgetary
Price (See Notes)
$5.88 @1k
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Simplified Block Diagram

MAX11040K, MAX11060: Functional Diagram MAX11040K, MAX11060: Functional Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX11040K evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the IC's 4-channel, simultaneous-sampling ADC. The EV kit also includes Windows® 2000-, Windows XP®-, and Windows Vista®- compatible software that provides a simple graphical user interface (GUI) for exercising the IC's features.

The EV kit comes with two MAX11040KGUU+s installed on the motherboard. Up to three more parts can be connected to the EV kit to increase the number of input channels by cascading up to three daughterboards to the EV kit (order separately).

View Details

Features

  • Eight Simultaneous ADC Channel Inputs (EV Kit Only)
  • Up to 20* Simultaneous ADC Channel Inputs with the EV Kit and the Daughterboards
  • Four Banana Jacks for Power-Supply Inputs
  • BNC Connectors on Channel 0 and Channel 1 for the EV Kit and Daughterboard for the Signal Inputs
  • Autofrequency, RMS, Min, Max, and Average DC Calculations in the EV Kit Software
  • USB-PC Connection
  • Proven PCB Layout
  • Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Evaluation Software
  • Fully Assembled and Tested

Description

The MAX11040K evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the IC's 4-channel, simultaneous-sampling ADC. The EV kit also includes Windows® 2000-, Windows XP®-, and Windows Vista®- compatible software that provides a simple graphical user interface (GUI) for exercising the IC's features.

The EV kit comes with two MAX11040KGUU+s installed on the motherboard. Up to three more parts can be connected to the EV kit to increase the number of input channels by cascading up to three daughterboards to the EV kit (order separately).

View Details

Features

  • Eight Simultaneous ADC Channel Inputs (EV Kit Only)
  • Up to 20* Simultaneous ADC Channel Inputs with the EV Kit and the Daughterboards
  • Four Banana Jacks for Power-Supply Inputs
  • BNC Connectors on Channel 0 and Channel 1 for the EV Kit and Daughterboard for the Signal Inputs
  • Autofrequency, RMS, Min, Max, and Average DC Calculations in the EV Kit Software
  • USB-PC Connection
  • Proven PCB Layout
  • Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Evaluation Software
  • Fully Assembled and Tested

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Support & Training

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Filtered Search

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 16
# Input Channels 4
Conv. Rate (ksps) (max) 64
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 2.3
External VREF (V) (max) 2.7
Bipolar VIN (±V) (max) 2.2
INL (±LSB) 1.5
Package/Pins TSSOP/38
Budgetary
Price (See Notes)
$5.88 @1k

Key Features

  • Feature Set Ideal for Energy Measurement Systems
    • Four Fully Differential Simultaneously Sampled Channels
    • Cascadable for Up to 32 Channels of Simultaneous Sampling
    • Programmable Sampling Phase for Phase Shift Compensation
      • 0 to 333µs in 1.33µs Steps
    • Programmable Output Data Rate with 0.065% Resolution
  • Excellent Performance for High-Accuracy Measurement Applications
    • 117dB SNR at 1ksps
    • 106dB SNR at 16ksps
    • 0.25% Error Over a 1000:1 Dynamic Range
    • ±2.2V Full-Scale Input Range
  • Single-Supply Operation and Protected Inputs for Design Simplicity and Robustness
    • 3.0V to 3.6V Analog Supply Voltage
    • 2.7V to VAVDD Digital Supply Voltage
    • ±6V Overvoltage Protected Inputs
    • -40°C to +105°C Operating Temperature Range

Applications/Uses

  • Industrial Data-Acquisition Systems
  • Medical Instrumentation
  • Multiphase Power Systems
  • Power-Protection Relay Equipment

Description

The MAX11040K/MAX11060 are 24-/16-bit, 4-channel, simultaneous-sampling, sigma-delta analog-to-digital converters (ADCs). The devices allow simultaneous sampling of as many as 32 channels using a built-in cascade feature to synchronize as many as eight devices. The serial interface of the devices allows reading data from all the cascaded devices using a single command. Four modulators simultaneously convert each fully differential analog input with a programmable data output rate ranging from 0.25ksps to 64ksps. The devices achieve 106dB SNR at 16ksps and 117dB SNR at 1ksps (MAX11040K). The devices operate from a single +3V supply. The differential analog input range is ±2.2V when using the internal reference; an external reference is optional. Each input is overvoltage protected up to ±6V without damage. The devices use an internal crystal oscillator or an external source for clock.

The devices are compatible with SPI, QSPI™, MICROWIRE®, and DSP-compatible 4-wire serial interfaces. An on-board interface logic allows one serial interface (with a single chip select) to control up to eight cascaded devices or 32 simultaneous sampling analog input channels.

The devices are ideally suited for power-management systems. Each channel includes an adjustable sampling phase enabling internal compensation for phase shift due to external dividers, transformers, or filters at the inputs. The output data rate is adjustable with a 0.065% resolution (at 16ksps or below) to track the varying frequency of a periodic input. An active-low SYNC input allows periodic alignment of the conversion timing of multiple devices with a remote timing source.

The devices are available in a 38-pin TSSOP package specified over the -40°C to +105°C industrial temperature range.

Simplified Block Diagram

MAX11040K, MAX11060: Functional Diagram MAX11040K, MAX11060: 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