For further information, including the Medical Applications Guide
and AFE5805 Datasheet, please complete the reply slip or visit
http://www.arrowne.com/innov/in219/f_1446.shtml
26
POWER AND LINEAR IC
SOLUTIONS
Texas Instruments’ AFE58xx Analogue Front End (AFE)
devices integrate multiple high-performance analogue
circuits, providing superior image quality for a wide range
of ultrasound applications. The devices consume less power
and are more than 50% smaller than comparable devices in
the market.
Despite their small size and low power, all four devices in the series
maintain low noise figures, allowing designers to offer portable
and handheld ultrasound systems with longer battery life and
better image quality.
The AFE5805 provides low power consumption and low noise
for portable to mid-range ultrasound systems. It offers 122mW
per channel power efficiency and a noise figure of 0.85nV/
√
Hz at
2MHz, making it suitable not only for portable equipment but also
for high channel density mid-range systems.
The device integrates eight Low Noise Amplifier (LNA) channels,
voltage controlled attenuator, programmable gain amplifier, low
pass filter and a 12-bit 50MSPS Analogue/Digital Converter (ADC)
with LVDS (Low Voltage Differential Signalling) data outputs.
The AFE5804 is pin to pin compatible and allows migration to
a lower power solution, 102mW/channel at 1.25nV/
√
Hz and
40MSPS. Mode control enables flexibility when programming the
level of noise and power consumption to optimise a system.
Both the AFE5805 and the AFE5804 are available in a 15mm x
9mm package.
The newest parts in the family, the AFE5851 and AFE5801, reduce
power consumption and package size further to support the new
market for handheld ultrasound systems. The AFE5851 is the
first 16-channel AFE for the ultrasound market. Both devices are
available in an ultra-small 9mm x 9mm package.
The AFE5851 features a power efficiency of 39mW/channel at
32.5MSPS. It integrates 16 VGAs (Variable Gain Amplifiers) and
eight 12-bit 65MSPS ADCs. Each ADC is therefore shared between
two VGAs and each VGA differential output is sampled at alternate
clock cycles to optimise power efficiency. The ADC has scalable
power consumption to reduce power use with lower sampling
rates. The AFE5851’s high channel count and low power features
allow for increased channel density in handheld systems.
The AFE5801 offers 50mW/channel at 30MSPS and 58mW/
channel at 50MSPS. It integrates eight VGAs and eight 12-bit
65MSPS ADCs with LVDS data outputs.
Features
U
Integrated analogue front ends
U
Low noise amplifier (AFE5804/05 only)
U
Voltage controlled attenuator
U
Programmable gain amplifier
U
Low pass filter
U
Analogue/digital converter
U
Best in class noise and power performance
U
Improved dynamic range
U
Enable portability with ultra-small package size
U
Fast overload recovery
Applications
U
Ultrasound equipment
- Handheld
- Portable
- Mid-range
Integrate low noise amplifier, voltage controlled attenuator, programmable gain amplifier and ADC
Four New Analogue Front-End Devices
Enable Portable and Handheld Ultrasound
ENQUIRY 1446
Texas Instruments Medical Applications Guide
and AFE5805 Datasheet available!
Please complete the reply slip or visit the
weblink below.
