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10-Bit, 45Msps, Ultra-Low-Power Analog Front-End

Product Details

Key Features

Parametric specs for Fast CODECs / Analog Front-End (AFE)
# Input Channels (ADC) 2
Conversion Speed (Msps) (ADC) 45
SNR (dB) (@ fIN) 54.2 @ 5.5MHz
Resolution (bits) (DAC) 10
Output Chan. (DAC) 2
Speed (Msps) (DAC) 45
SFDR (dBc) (@ fOUT) 73.2 @ 2.2MHz
THD (dBc) (@ fOUT) -71 @ 2.2MHz
Noise Spectral Density (dBFS/Hz) (@ fOUT) -130.6 @ 2.2MHz
VSUPPLY (V) 1.8
2.7 to 3.3
Package/Pins TQFN/48
Budgetary
Price (See Notes)
10.99
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Simplified Block Diagram

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Parameters

Parametric specs for Fast CODECs / Analog Front-End (AFE)
# Input Channels (ADC) 2
Conversion Speed (Msps) (ADC) 45
SNR (dB) (@ fIN) 54.2 @ 5.5MHz
Resolution (bits) (DAC) 10
Output Chan. (DAC) 2
Speed (Msps) (DAC) 45
SFDR (dBc) (@ fOUT) 73.2 @ 2.2MHz
THD (dBc) (@ fOUT) -71 @ 2.2MHz
Noise Spectral Density (dBFS/Hz) (@ fOUT) -130.6 @ 2.2MHz
VSUPPLY (V) 1.8
2.7 to 3.3
Package/Pins TQFN/48
Budgetary
Price (See Notes)
10.99

Key Features

  • Dual, 10-Bit, 45Msps Rx ADC and Dual, 10-Bit, 45Msps Tx DAC
  • Ultra-Low Power
    • 84.6mW at fCLK = 45MHz, Fast Mode
    • 77.1mW at fCLK = 45MHz, Slow Mode
    • Low-Current Standby and Shutdown Modes
  • Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
  • Excellent Dynamic Performance
    • SNR = 54.2dB at fIN = 5.5MHz (Rx ADC)
    • SFDR = 73.2dBc 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
  • Excellent Gain/Phase Match
    • ±0.03° 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 × 7mm × 0.8mm)

Applications/Uses

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

Description

The MAX19707 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, 45Msps receive (Rx) ADC; dual, 10-bit, 45Msps 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 84.6mW at a 45MHz clock frequency.

The Rx ADCs feature 54.2dB SNR and 71.2dBc SFDR at fIN = 5.5MHz and fCLK = 45MHz. The analog I/Q input amplifiers are fully differential and accept 1.024VP-P full-scale signals. Typical I/Q channel matching is ±0.03° phase and ±0.01dB gain.

The Tx DACs feature 73.2dBc SFDR at fOUT = 2.2MHz and fCLK = 45MHz. The analog I/Q full-scale output voltage is ±400mV differential. The Tx DAC common-mode DC level is programmable from 0.71V to 1.05V. The I/Q channel offset is programmable to optimize radio lineup sideband/carrier suppresion. The typical I/Q channel matching is ±0.01dB gain and ±0.07° 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 MAX19707 operates on a single 2.7V to 3.3V analog supply and 1.8V to 3.3V digital I/O supply. The MAX19707 is specified for the extended (-40°C to +85°C) temperature range and is available in a 48-pin, thin QFN package. The Selector Guide at the end of the data sheet lists other pin-compatible versions in this AFE family.

Simplified Block Diagram

MAX19707: Functional Diagram MAX19707: 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 .