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10-Bit, 22Msps, Ultra-Low-Power Analog Front-End

AFE Family Optimized for Low-Power Portable Applications

Product Details

The MAX19706 is an ultra-low-power, mixed-signal analog front-end (AFE) designed for power-sensitive communication equipment. Optimized for high dynamic performance at ultra-low power, the device integrates a dual, 10-bit, 22Msps receive (Rx) ADC; dual, 10-bit, 22Msps transmit (Tx) DAC; three fast-settling 12-bit aux-DAC channels for ancillary RF front-end control; and a 10-bit, 333ksps housekeeping aux-ADC. The typical operating power in Tx-Rx FAST mode is 49.5mW at a 22MHz clock frequency.

The Rx ADCs feature 54.6dB SNR and 75.6dBc SFDR at a 5.5MHz input frequency with a 22MHz clock frequency. The analog I/Q input amplifiers are fully differential and accept 1.024VP-P full-scale signals. Typical I/Q channel matching is ±0.12° phase and ±0.01dB gain.

The Tx DACs feature 72.6dBc SFDR at fOUT = 2.2MHz and fCLK = 22MHz. The analog I/Q full-scale output voltage is ±400mV differential. The Tx DAC common-mode DC level is programmable from 0.9V to 1.35V. The I/Q channel offset is adjustable. The typical I/Q channel matching is ±0.02dB gain and ±0.1° phase.

The Rx ADC and Tx DAC share a single, 10-bit parallel, high-speed digital bus allowing half-duplex operation for time-division duplex (TDD) applications. A 3-wire serial interface controls power-management modes, the aux-DAC channels, and the aux-ADC channels.

The MAX19706 operates on a single +2.7V to +3.3V analog supply and +1.8V to +3.3V digital I/O supply. The MAX19706 is specified for the extended (-40°C to +85°C) temperature range and is available in a 48-pin, thin QFN package. See a parametric table of the complete family of pin-compatible AFEs.

Key Features

  • Dual, 10-Bit, 22Msps Rx ADC and Dual, 10-Bit, 22Msps Tx DAC
  • Ultra-Low Power
    • 49.5mW at fCLK = 22MHz, Fast Mode
    • 39.3mW at fCLK = 22MHz, Slow Mode
    • Low-Current Standby and Shutdown Modes
  • Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
  • Excellent Dynamic Performance
    • SNR = 54.6dB at fIN = 5.5MHz (Rx ADC)
    • SFDR = 72.6dBc at fOUT = 2.2MHz (Tx DAC)
  • Three 12-Bit, 1µs Aux-DACs
  • 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and Data Averaging Mode
  • Excellent Gain/Phase Match
    • ±0.12° Phase, ±0.01dB Gain (Rx ADC) at fIN = 5.5MHz
  • Multiplexed Parallel Digital I/O
  • Serial-Interface Control
  • Versatile Power-Control Circuits
    • Shutdown, Standby, Idle, Tx/Rx Disable
  • Miniature 48-Pin Thin QFN Package (7mm x 7mm x 0.8mm)

Applications/Uses

  • 802.11a/b/g WLAN
  • Portable Communication Equipment
  • VoIP Terminals
  • WiMAX™ and WiBro™ CPEs

Simplified Block Diagram

MAX19706: Functional Diagram MAX19706: Functional Diagram Zoom icon

Technical Docs

Design & Development

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

Description

The MAX19705–MAX19708 evaluation systems (EV systems) consist of a MAX19705–MAX19708 evaluation kits (EV kits), a companion Maxim command module (CMOD232 or CMODUSB) interface board, and software. Order the complete EV system (see the Ordering Information) for comprehensive evaluation of the MAX19705–MAX19708 using a personal computer. Order the EV kit if the command module has already been purchased with a previous Maxim EV system, or for custom use in other microcontroller-based (µC) systems.

The MAX19705–MAX19708 EV kits are fully assembled and tested circuit boards that contain all the components necessary to evaluate the performance of the MAX19705–MAX19708 analog front-ends (AFEs). The MAX19705–MAX19708 integrate a dual-receive analog-to-digital converter (Rx ADC), a dual-transmit digital-to-analog converter (Tx DAC), a 1.024V internal voltage reference, three low-speed serial DACs, and one low-speed serial ADC. The EV kit boards accept AC- or DC-coupled, differential or single-ended analog inputs for the Rx ADC and include circuitry that converts the Tx DAC differential output signals to single-ended analog outputs. The EV kits include circuitry that generates a clock signal from an AC sine-wave input signal. The EV kits operate from a +3.0V analog power supply, a +1.8V digital power supply, a +3.0V clock power supply, and ±5V bipolar power supplies.

The Maxim command module interface board (CMOD232 or CMODUSB) allows a PC to use its serial or USB port to emulate an SPI 3-wire interface. Windows® 98/2000/XP-compatible software, which can be downloaded from www.maximintegrated.com, provides a user-friendly interface to exercise the features of the MAX19705–MAX19708. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display.

View Details

Features

  • ADC/DAC Sampling Rates from 7.5Msps to 45Msps
  • Low Voltage and Power Operation
  • Adjustable-Gain, Low-Speed DAC Buffers
  • On-Board Clock-Shaping Circuitry
  • On-Board Level-Translating I/O Drivers
  • Assembled and Tested
  • Windows 98/2000/XP-Compatible Software Included

Description

The MAX19705–MAX19708 evaluation systems (EV systems) consist of a MAX19705–MAX19708 evaluation kits (EV kits), a companion Maxim command module (CMOD232 or CMODUSB) interface board, and software. Order the complete EV system (see the Ordering Information) for comprehensive evaluation of the MAX19705–MAX19708 using a personal computer. Order the EV kit if the command module has already been purchased with a previous Maxim EV system, or for custom use in other microcontroller-based (µC) systems.

The MAX19705–MAX19708 EV kits are fully assembled and tested circuit boards that contain all the components necessary to evaluate the performance of the MAX19705–MAX19708 analog front-ends (AFEs). The MAX19705–MAX19708 integrate a dual-receive analog-to-digital converter (Rx ADC), a dual-transmit digital-to-analog converter (Tx DAC), a 1.024V internal voltage reference, three low-speed serial DACs, and one low-speed serial ADC. The EV kit boards accept AC- or DC-coupled, differential or single-ended analog inputs for the Rx ADC and include circuitry that converts the Tx DAC differential output signals to single-ended analog outputs. The EV kits include circuitry that generates a clock signal from an AC sine-wave input signal. The EV kits operate from a +3.0V analog power supply, a +1.8V digital power supply, a +3.0V clock power supply, and ±5V bipolar power supplies.

The Maxim command module interface board (CMOD232 or CMODUSB) allows a PC to use its serial or USB port to emulate an SPI 3-wire interface. Windows® 98/2000/XP-compatible software, which can be downloaded from www.maximintegrated.com, provides a user-friendly interface to exercise the features of the MAX19705–MAX19708. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display.

View Details

Features

  • ADC/DAC Sampling Rates from 7.5Msps to 45Msps
  • Low Voltage and Power Operation
  • Adjustable-Gain, Low-Speed DAC Buffers
  • On-Board Clock-Shaping Circuitry
  • On-Board Level-Translating I/O Drivers
  • Assembled and Tested
  • Windows 98/2000/XP-Compatible Software Included

Description

The MAX19705–MAX19708 evaluation systems (EV systems) consist of a MAX19705–MAX19708 evaluation kits (EV kits), a companion Maxim command module (CMOD232 or CMODUSB) interface board, and software. Order the complete EV system (see the Ordering Information) for comprehensive evaluation of the MAX19705–MAX19708 using a personal computer. Order the EV kit if the command module has already been purchased with a previous Maxim EV system, or for custom use in other microcontroller-based (µC) systems.

The MAX19705–MAX19708 EV kits are fully assembled and tested circuit boards that contain all the components necessary to evaluate the performance of the MAX19705–MAX19708 analog front-ends (AFEs). The MAX19705–MAX19708 integrate a dual-receive analog-to-digital converter (Rx ADC), a dual-transmit digital-to-analog converter (Tx DAC), a 1.024V internal voltage reference, three low-speed serial DACs, and one low-speed serial ADC. The EV kit boards accept AC- or DC-coupled, differential or single-ended analog inputs for the Rx ADC and include circuitry that converts the Tx DAC differential output signals to single-ended analog outputs. The EV kits include circuitry that generates a clock signal from an AC sine-wave input signal. The EV kits operate from a +3.0V analog power supply, a +1.8V digital power supply, a +3.0V clock power supply, and ±5V bipolar power supplies.

The Maxim command module interface board (CMOD232 or CMODUSB) allows a PC to use its serial or USB port to emulate an SPI 3-wire interface. Windows® 98/2000/XP-compatible software, which can be downloaded from www.maximintegrated.com, provides a user-friendly interface to exercise the features of the MAX19705–MAX19708. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display.

View Details

Features

  • ADC/DAC Sampling Rates from 7.5Msps to 45Msps
  • Low Voltage and Power Operation
  • Adjustable-Gain, Low-Speed DAC Buffers
  • On-Board Clock-Shaping Circuitry
  • On-Board Level-Translating I/O Drivers
  • Assembled and Tested
  • Windows 98/2000/XP-Compatible Software Included

Description

The MAX19705–MAX19708 evaluation systems (EV systems) consist of a MAX19705–MAX19708 evaluation kits (EV kits), a companion Maxim command module (CMOD232 or CMODUSB) interface board, and software. Order the complete EV system (see the Ordering Information) for comprehensive evaluation of the MAX19705–MAX19708 using a personal computer. Order the EV kit if the command module has already been purchased with a previous Maxim EV system, or for custom use in other microcontroller-based (µC) systems.

The MAX19705–MAX19708 EV kits are fully assembled and tested circuit boards that contain all the components necessary to evaluate the performance of the MAX19705–MAX19708 analog front-ends (AFEs). The MAX19705–MAX19708 integrate a dual-receive analog-to-digital converter (Rx ADC), a dual-transmit digital-to-analog converter (Tx DAC), a 1.024V internal voltage reference, three low-speed serial DACs, and one low-speed serial ADC. The EV kit boards accept AC- or DC-coupled, differential or single-ended analog inputs for the Rx ADC and include circuitry that converts the Tx DAC differential output signals to single-ended analog outputs. The EV kits include circuitry that generates a clock signal from an AC sine-wave input signal. The EV kits operate from a +3.0V analog power supply, a +1.8V digital power supply, a +3.0V clock power supply, and ±5V bipolar power supplies.

The Maxim command module interface board (CMOD232 or CMODUSB) allows a PC to use its serial or USB port to emulate an SPI 3-wire interface. Windows® 98/2000/XP-compatible software, which can be downloaded from www.maximintegrated.com, provides a user-friendly interface to exercise the features of the MAX19705–MAX19708. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display.

View Details

Features

  • ADC/DAC Sampling Rates from 7.5Msps to 45Msps
  • Low Voltage and Power Operation
  • Adjustable-Gain, Low-Speed DAC Buffers
  • On-Board Clock-Shaping Circuitry
  • On-Board Level-Translating I/O Drivers
  • Assembled and Tested
  • Windows 98/2000/XP-Compatible Software Included

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Parameters

Key Features

  • Dual, 10-Bit, 22Msps Rx ADC and Dual, 10-Bit, 22Msps Tx DAC
  • Ultra-Low Power
    • 49.5mW at fCLK = 22MHz, Fast Mode
    • 39.3mW at fCLK = 22MHz, Slow Mode
    • Low-Current Standby and Shutdown Modes
  • Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
  • Excellent Dynamic Performance
    • SNR = 54.6dB at fIN = 5.5MHz (Rx ADC)
    • SFDR = 72.6dBc at fOUT = 2.2MHz (Tx DAC)
  • Three 12-Bit, 1µs Aux-DACs
  • 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and Data Averaging Mode
  • Excellent Gain/Phase Match
    • ±0.12° Phase, ±0.01dB Gain (Rx ADC) at fIN = 5.5MHz
  • Multiplexed Parallel Digital I/O
  • Serial-Interface Control
  • Versatile Power-Control Circuits
    • Shutdown, Standby, Idle, Tx/Rx Disable
  • Miniature 48-Pin Thin QFN Package (7mm x 7mm x 0.8mm)

Applications/Uses

  • 802.11a/b/g WLAN
  • Portable Communication Equipment
  • VoIP Terminals
  • WiMAX™ and WiBro™ CPEs

Description

The MAX19706 is an ultra-low-power, mixed-signal analog front-end (AFE) designed for power-sensitive communication equipment. Optimized for high dynamic performance at ultra-low power, the device integrates a dual, 10-bit, 22Msps receive (Rx) ADC; dual, 10-bit, 22Msps transmit (Tx) DAC; three fast-settling 12-bit aux-DAC channels for ancillary RF front-end control; and a 10-bit, 333ksps housekeeping aux-ADC. The typical operating power in Tx-Rx FAST mode is 49.5mW at a 22MHz clock frequency.

The Rx ADCs feature 54.6dB SNR and 75.6dBc SFDR at a 5.5MHz input frequency with a 22MHz clock frequency. The analog I/Q input amplifiers are fully differential and accept 1.024VP-P full-scale signals. Typical I/Q channel matching is ±0.12° phase and ±0.01dB gain.

The Tx DACs feature 72.6dBc SFDR at fOUT = 2.2MHz and fCLK = 22MHz. The analog I/Q full-scale output voltage is ±400mV differential. The Tx DAC common-mode DC level is programmable from 0.9V to 1.35V. The I/Q channel offset is adjustable. The typical I/Q channel matching is ±0.02dB gain and ±0.1° phase.

The Rx ADC and Tx DAC share a single, 10-bit parallel, high-speed digital bus allowing half-duplex operation for time-division duplex (TDD) applications. A 3-wire serial interface controls power-management modes, the aux-DAC channels, and the aux-ADC channels.

The MAX19706 operates on a single +2.7V to +3.3V analog supply and +1.8V to +3.3V digital I/O supply. The MAX19706 is specified for the extended (-40°C to +85°C) temperature range and is available in a 48-pin, thin QFN package. See a parametric table of the complete family of pin-compatible AFEs.

Simplified Block Diagram

MAX19706: Functional Diagram MAX19706: 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