DALLAS, Jan. 19, 2012 /PRNewswire/ -- Texas Instruments
Incorporated (TI) (NASDAQ: TXN) introduced today the industry's
fastest, highest-performance analog front end (AFE) for femtocell
base stations and portable software-defined radio (SDR)
applications. The low-power, 12-bit AFE7225 integrates a dual
125-MSPS analog-to-digital converter (ADC) and dual 250-MSPS
digital-to-analog converter (DAC). It operates 25-percent faster
than the competition, while increasing the signal-to-noise ratio
(SNR) by 2 dB and providing up to five times the DAC output
current. For more information and to order samples of these new
AFEs, visit www.ti.com/afe7225-pr.
In addition to the AFE7225, the 12-bit AFE7222 is available for
lower bandwidth, power-sensitive applications. It integrates a dual
65-MSPS ADC and dual 130-MSPS DAC and uses only 398 mW in
full-duplex or 212 mW in half-duplex receive mode at full
speed.
The AFE7225 and AFE7222 both integrate more digital signal
processing capabilities than similar AFEs, which increases design
flexibility. They are the only mixed-signal AFEs with independent
transmit and receive, 32-bit numerically controlled oscillators
(NCOs), serialized LVDS input/output options, and independent
transmit/receive quadrature modulation correction for gain, phase
and offset imbalances.
Key features and benefits of the AFE7225 and AFE7222
- Low power consumption: Consumes only 12 mW of power in
deep-sleep mode with a wake-up of only 13 us, or as little as 120
mW in light-sleep mode with 5-us wake-up time.
- High performance for clearer signals: Dual ADC achieves
70 dB SNR, while the dual DAC achieves an adjacent channel leakage
ratio of 75 dB with a 3G W-CDMA cellular signal.
- Signal processing reduces FPGA gate count requirements,
interface speed and cost: Both feature independent transmit and
receive digital block up- and down-conversion with 2x to 4x
interpolation, 2x decimation, coarse and 32-bit NCO frequency
mixers; digital correction of gain, phase and offset for quadrature
modulation receive and/or transmit; and a peak/rms power
meter.
- Integration reduces system cost: Dual 12-bit auxiliary
DAC and dual-input 12-bit auxiliary ADC eliminate the need for a
separate monitoring and control device, reducing board space, power
and cost.
- Flexibility for designers: Digital DAC inputs and ADC
outputs can be configured for serial LVDS to save pin/trace-count
and aid long-trace signaling; or multiplexed 12-bit CMOS for a
low-power interface, supporting full-duplex over two buses or
half-duplex from one or two digital buses.
The AFE7225 and AFE7222 can be used in heterodyne or
direct-conversion radio architectures. For heterodyne radios, a
single DAC channel in the AFEs can be used to create an
intermediate frequency up to approximately 100 MHz for transmit,
and a single ADC channel can be used to capture IFs of more than
300 MHz, with the unused channels shut down to conserve power. For
femtocell base stations, the AFEs provide macro-cell performance
when combined with high-quality RF components, such as the
TRF372017 IQ modulator with local oscillator and the TRF371125 IQ
demodulator.
Tools and support
Evaluation modules are available now for $499. The AFE7222EVM and AFE7225EVM include the
TRF370333 IQ modulator and CDCE72010 clock jitter cleaner, as well
as TI power management devices, such as DC/DC converters and
low-noise LDOs, to provide a complete bits-to-RF prototyping and
reference design.
An IBIS model to verify board signal integrity requirements is
also available.
Support is available on the High Speed Data Converters Forum in
the TI E2ETM Community, where engineers can ask
questions and help solve problems.
Availability and pricing
The AFE7225 is available in a 9-mm x 9-mm QFN package for a
suggested retail price of $29.50 for
1,000-units. The AFE7222 is available in a 9-mm x 9-mm QFN package
for a suggested retail price of $19.50 in 1,000-unit quantities.
Learn more about TI's solutions for small-cell base stations
by visiting the links below:
- Buy the AFE7225EVM from the TI eStore:
www.ti.com/afe7225evmbuy-pr.
- Order AFE7225 samples: www.ti.com/afe7225s-pr.
- Buy the AFE7222EVM: www.ti.com/afe7222evmbuy-pr.
- Order AFE7222 samples: www.ti.com/afe7222s-pr.
- Check out the data sheet: www.ti.com/afe7225ds-pr.
- Read about TI's systems-on-chip (SOCs) for metro, pico, femto
and enterprise small-cell base stations:
www.ti.com/smallcellsocwp-pr.
About Texas Instruments
Texas Instruments (NASDAQ: TXN) helps customers solve problems
and develop new electronics that make the world smarter, healthier,
safer, greener and more fun. A global semiconductor company,
TI innovates through manufacturing, design and sales operations in
more than 30 countries. For more information, go to
www.ti.com.
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owners.
SOURCE Texas Instruments Incorporated