AFE5804:FULLY-INTEGRATED, 8-CHANNEL ANALOG-p.htm" target="_blank" title="ANALOG货源和PDF资料">ANALOG-p.htm" target="_blank" title="ANALOG-p.htm" target="_blank" title="ANALOG货源和PDF资料">ANALOG货源和PDF资料">ANALOG-p.htm" target="_blank" title="ANALOG货源和PDF资料">ANALOG FRONT-END FOR ULTRASOUND 0.92nV/√Hz, 12-Bit, 40MSPS, 102mW/Channel

The AFE5804 is a complete analog front-end device specifically designed for ultrasound systems that require low power and small size.

The AFE5804 consists of eight channels, including a low-noise amplifier (LNA), voltage-controlled attenuator (VCA), programmable gain amplifier (PGA), low-pass filter (LPF), and a 12-bit analog-to-digital converter (ADC) with low voltage differential signaling (LVDS) data outputs.

The LNA gain is set for 20dB gain and has excellent noise and signal handling capabilities, including fast overload recovery. VCA gain can vary over a 46dB range with a 0V to 1.2V control voltage common to all channels of the AFE5804.

The PGA can be programmed for gains of 20dB, 25dB, 27dB, and 30dB. The internal low-pass filter can also be programmed to 12.5MHz or 17.5MHz.

The LVDS outputs of the ADC reduce the number of interface lines to an ASIC or FPGA, thereby enabling the high system integration densities desired for portable systems. The ADC can either be operated with internal or external references. The ADC also features a signal-to-noise ratio (SNR) enhancement mode that can be useful at high gains.

The AFE5804 is available in a 15mm × 9mm, 135-ball BGA package that is Pb-free (RoHS-compliant) and green. It is specified for operation from 0°C to +70°C.

主要特性:

8-Channel Complete Analog Front-End:

LNA, VCA, PGA, LPF, and ADC

Mode Control for Power/Noise Optimization:

Low Noise (Full-Channel):

0.92nV/√Hz (TGC Mode I)

1.25nV/√Hz (TGC Mode II)

1.10nV/√Hz (CW and PW Modes)

Ultra-Low Power:

102mW/Channel (TGC Mode II)

65mW/Channel (CW Mode)

Low-Noise Pre-Amp (LNA):

0.75nV/√Hz

20dB Fixed Gain

280mVPP Linear Input Range

Variable-Gain Amplifier:

Gain Control Range: 46dB

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

Low-Pass Filter:

Selectable BW: 12.5MHz, 17.5MHz

2nd-Order, Bessel

Gain Error: ±0.5dB

Channel Matching: ±0.25dB

Distortion, HD2: -47dBc at 0.2VPP Input

Clamping

Fast Overload Recovery

Rapid Power-Up/Power-Down ≤ 2µs

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

主要应用:

Medical Imaging, Ultrasound

Portable Systems

Battery-Powered Systems