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IF Undersampler

Product Details

Key Features

Parametric specs for Fast CODECs / Analog Front-End (AFE)
# Input Channels (ADC) 1
Conversion Speed (Msps) (ADC) 15
SNR (dB) (@ fIN) 44 @ 10.7MHz
Resolution (bits) (DAC) 7
Output Chan. (DAC) 1
Speed (Msps) (DAC) 15
SFDR (dBc) (@ fOUT) 39 @ 15MHz
THD (dBc) (@ fOUT) -28 @ 15MHz
VSUPPLY (V) 2.7 to 5.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.72
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Simplified Block Diagram

Technical Docs

Data Sheet IF Undersampler Sep 01, 1997

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Sampling:
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Parameters

Parametric specs for Fast CODECs / Analog Front-End (AFE)
# Input Channels (ADC) 1
Conversion Speed (Msps) (ADC) 15
SNR (dB) (@ fIN) 44 @ 10.7MHz
Resolution (bits) (DAC) 7
Output Chan. (DAC) 1
Speed (Msps) (DAC) 15
SFDR (dBc) (@ fOUT) 39 @ 15MHz
THD (dBc) (@ fOUT) -28 @ 15MHz
VSUPPLY (V) 2.7 to 5.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.72

Key Features

  • Differential-Input, 5-Bit ADC
  • Differential-Output, 7-Bit DAC
  • 15Msps Min Conversion Rate
  • 25MHz -1dB Full-Power Bandwidth
  • 44dB SFDR for ADC
  • 39dB at 10.7MHz SFDR (Imaged) for DAC
  • Internal Voltage Reference
  • Parallel Logic Interface
  • Single-Supply Operation (+2.7V to +5.5V)
  • 0.1µA Low-Power Shutdown Mode

Applications/Uses

  • PCS/N
  • PHS/P
  • PWT1900
  • Wireless Loops

Description

The MAX1005 is a combined digitizer and reconstruction integrated circuit designed to work in systems that demodulate and modulate communications signals. It integrates IF undersampling and signal synthesis functions into a single, low-power circuit. Its analog-to-digital converter (ADC) is used to directly sample or undersample a downconverted RF signal, while its digital-to-analog converter (DAC) recreates the IF sub-carrier and transmission data. The MAX1005's ADC is ideal for undersampling applications, due to the analog input amplifier's wide (15MHz) bandwidth. The DAC has very low glitch energy, which minimizes the transmission of unwanted spurious signals. An on-chip reference provides for low-noise ADC and DAC conversions.

The MAX1005 provides a high level of signal integrity from a low power budget. It operates from a single power supply, or from separate analog and digital supplies with independent voltages ranging from +2.7V to +5.5V. The MAX1005 can operate with an unregulated analog supply of 5.5V and a regulated digital supply down to 2.7V. This flexible power-supply operation saves additional power in complex digital systems.

The MAX1005 has three operating modes: transmit (DAC active), receive (ADC active), and shutdown (ADC and DAC inactive). In shutdown mode, the total supply current drops below 1µA. The device requires only 2.4µs to wake up from shutdown mode. The MAX1005 is ideal for hand-held, as well as base-station applications. It is available in a tiny 16-pin QSOP package specified for operation over both the commercial and extended temperature ranges.

Simplified Block Diagram

MAX1005: Functional Diagram MAX1005: Functional Diagram Zoom icon

Technical Docs

Data Sheet IF Undersampler Sep 01, 1997

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.