AFE5804 datasheet(1/60 Pages) TI

Part #	AFE5804

Description	FULLY-INTEGRATED, 8-CHANNEL ANALOG FRONT-END FOR ULTRASOUND 0.89nV/?숰z, 12-Bit, 40MSPS, 101mW/Channel

PDF	60 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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1 / 60 page

1

FEATURES

DESCRIPTION

APPLICATIONS

LNA

8Channels

SPI

IN1

IN8

..

CH1

LVDS

OUT

CH8

..

VCA/PGA

Clamp

and

LPF

Logic/Controls

Reference

CWSwitchMatrix(8 10)

´

I

(10)

OUT

12-Bit

ADC

AFE5804

www.ti.com ................................................................................................................................................ SBOS442A – JUNE 2008 – REVISED SEPTEMBER 2008

FULLY-INTEGRATED, 8-CHANNEL ANALOG FRONT-END FOR ULTRASOUND

0.89nV/

√Hz, 12-Bit, 40MSPS, 101mW/Channel

23

• 8-Channel Complete Analog Front-End:

The AFE5804 is a complete analog front-end device

specifically designed for ultrasound systems that

–

LNA, VCA, PGA, LPF, and ADC

require low power and small size.

• Mode Control for Power/Noise Optimization:

The AFE5804 consists of eight channels, including a

–

Low Noise (Full-Channel):

low-noise

amplifier

(LNA),

voltage-controlled

0.89nV/

√Hz (TGC Mode I)

attenuator

(VCA),

programmable

gain

amplifier

1.23nV/

√Hz (TGC Mode II)

(PGA),

low-pass

filter

(LPF),

and

a

12-bit

1.03nV/

√Hz (PW Mode)

analog-to-digital converter (ADC) with low voltage

–

Ultra-Low Power:

differential signaling (LVDS) data outputs.

101mW/Channel (TGC Mode II)

The LNA gain is set for 20dB gain and has excellent

65mW/Channel (CW Mode)

noise and signal handling capabilities, including fast

• Low-Noise Pre-Amp (LNA):

overload recovery. VCA gain can vary over a 46dB

–

0.75nV/

√Hz

range with a 0V to 1.2V control voltage common to all

channels of the AFE5804.

–

20dB Fixed Gain

The PGA can be programmed for gains of 20dB,

–

280mVPP Linear Input Range

25dB, 27dB, and 30dB. The internal low-pass filter

• Variable-Gain Amplifier:

can also be programmed to 12.5MHz or 17MHz.

–

Gain Control Range: 46dB

The LVDS outputs of the ADC reduce the number of

• PGA Gain Settings: 20dB, 25dB, 27dB, 30dB

interface lines to an ASIC or FPGA, thereby enabling

• Low-Pass Filter:

the high system integration densities desired for

portable systems. The ADC can either be operated

–

Selectable BW: 12.5MHz, 17MHz

with internal or external references. The ADC also

–

2nd-Order, Bessel

features a signal-to-noise ratio (SNR) enhancement

• Gain Error: ±0.5dB

mode that can be useful at high gains.

• Channel Matching: ±0.25dB

The AFE5804 is available in a 15mm × 9mm,

• Clamping

135-ball

BGA

package

that

is

Pb-free

(RoHS-compliant) and green. It is specified for

• Fast Overload Recovery: Two Clock Cycles

operation from 0°C to +85°C.

• 12-Bit Analog-to-Digital Converter:

–

10MSPS to 50MSPS

–

69dB SNR at 10MHz

–

Serial LVDS Interface

• Integrated CW Switch Matrix

• 15mm × 9mm, 135-BGA Package:

–

Pb-Free (RoHS-Compliant) and Green

• Medical Imaging, Ultrasound

–

Portable Systems

–

Battery-Powered Systems

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Infineon is a registered trademark of Infineon Technologies.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Similar Part No. - AFE5804

Manufacturer	Part #	Datasheet	Description
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