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16-Bit, Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor

Product Details

Key Features

Applications/Uses

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 16
# Input Channels 2
Conv. Rate (ksps) (max) 0.512
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 2.5
INL (±LSB) 2
Package/Pins TQFN/40
Budgetary
Price (See Notes)
6.01
Parametric specs for Sensor Signal Conditioners
Sensing Element Amperometric Cell (Blood Glucose)
PGA Gain 1 to 8 (4 gains)
Calibration Method External microcontroller
Output Type Digital
ICC (mA) (typ) 1.15
Interface SPI
DACs/ADCs 16-bit ADC
2 10-bit DACs
VSUPPLY (V) 1.8 to 3.6
Package/Pins TQFN/40
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 16
# Input Channels 2
Conv. Rate (ksps) (max) 0.512
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 2.5
INL (±LSB) 2
Package/Pins TQFN/40
Budgetary
Price (See Notes)
6.01
Parametric specs for Sensor Signal Conditioners
Sensing Element Amperometric Cell (Blood Glucose)
PGA Gain 1 to 8 (4 gains)
Calibration Method External microcontroller
Output Type Digital
ICC (mA) (typ) 1.15
Interface SPI
DACs/ADCs 16-bit ADC
2 10-bit DACs
VSUPPLY (V) 1.8 to 3.6
Package/Pins TQFN/40

Key Features

  • +1.8V to +3.6V Single-Supply Operation
  • Multichannel, 16-Bit, Sigma-Delta ADC
    • 10sps to 477sps Programmable Conversion Rate
    • Self- and System Offset and Gain Calibration
    • PGA with Gains of 1, 2, 4, or 8
    • Unipolar and Bipolar Modes
    • 10-Input Differential Multiplexer
  • 10-Bit Force-Sense DACs
  • Uncommitted Op Amps
  • Dual SPDT and SPST Analog Switches
  • Selectable References
    • 1.25V, 2.048V, and 2.5V
  • Internal Charge Pump
  • System Support
    • RTC and Alarm Register
    • Internal/External Temperature Sensor
    • Internal Oscillator with Clock Output
    • User-Programmable I/O and Interrupt Generator
    • VDD Monitors
  • SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
  • Space-Saving (6mm x 6mm x 0.8mm), 40-Pin TQFN Package

Applications/Uses

  • Battery-Powered and Portable Devices
  • Data-Acquisition Systems
  • Electrochemical and Optical Sensors
  • Industrial Control
  • Medical Instruments

Description

The MAX1358B smart data-acquisition system (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter (ADC) and system-support functionality for a microprocessor (µP)-based system. This device integrates an ADC, DACs, operational amplifiers, internal selectable-voltage reference, temperature sensors, analog switches, a 32kHz oscillator, a real-time clock (RTC) with alarm, a high-frequency-locked loop (FLL) clock, four user-programmable I/Os, an interrupt generator, and 1.8V and 2.7V voltage monitors in a single chip.

The MAX1358B has dual 10:1 differential input multiplexers (muxes) that accept signal levels from 0 to AVDD. An on-chip 1x to 8x programmable-gain amplifier (PGA) allows measuring low-level signals and reduces external circuitry required.

The MAX1358B operates from a single +1.8V to +3.6V supply and consumes only 1.15mA in normal mode and only 3µA in sleep mode. The MAX1358B has two DACs with one uncommitted op amp.

The serial interface is compatible with either SPI™/QSPI™ or MICROWIRE™, and is used to power up, configure, and check the status of all functional blocks.

The MAX1358B is available in a space-saving, 40-pin TQFN package and is specified over the commercial (0°C to +70°C) and the extended (-40°C to +85°C) temperature ranges.

Simplified Block Diagram

MAX1358B: Functional Diagram MAX1358B: 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 .