Data Converters

High Speed ADCs (>10MSPS) – RF sampling

NEW | ADC32RF45

  • Industry's first 14-bit 3-GSPS RF sampling ADC
  • Ability to support RF inputs up to 4-GHz
  • Industry leading noise spectral density
  • Multi-band digital down converter capability
  • High performance in 1st, 2nd and 3rd Nyquist zones
  • Replaces up to 4 blocks in the IF stage of the signal chain (4 ICs and 40 passive components)
  • 75% area reduction in the typical analog receive chain 
ADC32RF45

RF sampling ADCs capable of sampling frequencies >1 GHz

Resolution Channels Max Sampling Rate 0.3 - 0.5 GSPS Max Sampling Rate 0.55 - 0.9 GSPS Max Sampling Rate 1 - 1.4 GSPS Max Sampling Rate 1.5 - 2 GSPS Max Sampling Rate 2.1 - 3 GSPS Max Sampling Rate 3.1 - 4 GSPS Max Sampling Rate >4 GSPS
16-bit Single ADC31JB68
16-bit Dual ADS54J69 ADS54J60
14-bit Single ADS5474
14-bit Dual ADS54J42 ADS54J40 ADC32RF45
12-bit Single ADS5403

ADS5401

ADS54RF63

ADC12D500RF

ADS5400

ADC12J1600

ADC12D800RF

ADC12D1000RF

ADC12J2700

ADC12J4000

ADC12D1600RF

ADC12D1800RF

12-bit Dual

ADC12D500RF

ADS5404

ADS5407

ADC12D800RF

ADS5402

ADS5409

ADC12D1000RF

ADC12D1600RF

ADC12D1800RF

10-bit Single ADC10D1000 ADC10D1500
10-bit Dual ADC10D1000 ADC10D1500
7-8-bit Single ADC08500 ADC08D500

ADC081D1020

ADC081500

ADC083000

ADC08B3000

ADC08D1520

ADC07D1520

LM97600
7-8-bit Dual

ADC08D502

ADC08D500

ADC08DL502

ADC08D1020

ADC08D1520

ADC07D1520

LM97600
7-8-bit Quad LM97600

To look at TI's complete portfolio, go to the parametric search and adjust analog input bandwidth

What is RF sampling?

"RF sampling" is the technology of digitizing an RF signal with an ADC directly, without an analog frequency conversion to a lower IF (intermediate frequency) or baseband (Zero IF) before the signal is converted from analog to digital.

An RF sampling ADC can replace a radio signal path subsystem of mixers, LO synthesizers, intermediate frequency amplifiers and filters, and sometimes multiple ADCs, reducing bill of materials, cost, design time, size, weight, and power, while increasing the software programmability and flexibility of the system.

TI's latest generation of RF sampling ADCs can digitize signals at frequencies up to ~4GHz and at sample rates up to 4Gsps, addressing the needs of UHF/VHF/L/S-bands (IEEE) to cover a wide array of applications such as 3G/4G/5G wireless base stations, microwave backhaul, test, scientific, spectroscopy, military communications , radar and wideband software-defined radio (SDR).

RF sampling

Where is RF sampling Used?

An RF sampling ADC can replace the final (or only) frequency conversion stage in RF applications such as:

  • Software Defined Radio
  • RADAR/SIGINT/ELINT
  • Signal/Spectrum Analyzers
  • Cable Headend
  • Cellular Base Stations
  • Wireless Backhaul
  • Radio Astronomy
  • GPS/GLONASS/Galileo Navigation Receivers

RF vs IF/ZIF Sampling

RF sampling can replace IF-sampling and ZIF-sampling architectures

Performance Example

The following FFT plots are proof that the performance of RF sampling ADCs is achieving high levels of spectral purity and bandwidth

Performance Example

Integrated Digital Down Converter

The inclusion of an integrated DDC (digital down converter) in the RF sampling ADC allows the processing of one or more narrow band signals of interest with reduced (decimated) data rates at the DDC output and interface to the DSP/FPGA, while providing the observation of a large bandwidth via a high sample rate ADC.

Integrated Digital Down Converter