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AFE5828ZAV 燁弘軒電子 TI 新品特供熱賣 有現貨 可添加我們聯系方式獲取最優惠價格
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描述
The AFE5828 device is a highly-integrated, analog front-end (AFE) solutions specifically designed for ultrasound systems where high performance, low power, and small size are required.
The AFE5828 is an integrated AFE optimized for medical ultrasound application. The device is realized through a multichip module (MCM) with two dies: one voltage-controlled amplifier (VCA) die and one analog-to-digital converter (ADC) die. The VCA die has 16 channels that interface with the 16 channels of the ADC die.
Each channel in the VCA die can be configured in one of two modes: time gain compensation (TGC) mode or continuous wave (CW) mode. In TGC mode, each channel includes a low-noise amplifier (LNA), a voltage-controlled attenuator (VCAT), a programmable gain amplifier (PGA), and a third-order, low-pass filter (LPF). The LNA is programmable in gains of 21 dB, 18 dB, or 15 dB. The LNA also supports active termination. The VCAT supports an attenuation range of 0 dB to 36 dB, with analog voltage control for the attenuation. The PGA provides gain options from 18 dB to 27 dB in steps of 3 dB. The LPF cutoff frequency can be set between 10MHz and 30 MHz to support ultrasound applications with different frequencies. In CW mode, the output of the LNA goes to a low-power passive mixer with 16 selectable phase delays followed by a summing amplifier with a band-pass filter. Different phase delays can be applied to each analog input signal to perform an on-chip beamforming operation. A harmonic filter in the CW mixer suppresses the third and fifth harmonic to enhance the sensitivity of the CW Doppler measurement.
The 16 channels of the ADC die can be configured to operate with a resolution of 14 bits or 12 bits. The ADC resolution can be traded off with conversion rate, and can operate at maximum speeds of 65 MSPS and 80MSPS at 14-bit and 12-bit resolution, respectively. The ADC is designed to scale its power with sampling rate. The output interface of the ADC comes out through a low-voltage differential signaling (LVDS) that can easily interface with low-cost field-programmable gate arrays (FPGAs).
The device also allows various power and noise combinations to be selected for optimizing system performance. Therefore, these devices are suitable ultrasound AFE solutions for systems with strict battery-life requirements.
The device is available in a 15-mm × 15-mm NFBGA-289 package and is pin-compatible with theAFE5818andAFE5816family.
特性
16-Channel AFE for Ultrasound Applications:
Optimized Signal Chains for TGC and CW Modes
Four Programmable TGC Profiles
Low-Noise Amplifier (LNA) With:
Programmable Gain: 21 dB, 18 dB, and 15 dB
Linear Input Signal Amplitude:
0.37 VPP, 0.5 VPP, and 0.71 VPP
Active Termination
Voltage-Controlled Attenuator (VCAT):
Attenuation Range: 0 dB–36 dB
Programmable Gain Amplifier (PGA):
18 dB–27 dB in Steps of 3 dB
3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
Cutoff Frequency From 10 MHz to 30 MHz
ADC Modes (Idle-Channel SNR):
14-Bit, 65-MSPS Mode: 75-dBFS
12-Bit, 80-MSPS Mode: 72-dBFS
Optimized for Noise and Power:
TGC Mode: 102 mW/Ch at 0.8 nV/√Hz,
65-MSPS, 14-Bit Output
CW Mode: 63 mW/Ch
Excellent Device-to-Device Gain Matching:
±0.4 dB (Typical)
Fast and Consistent Overload Recovery
Continuous Wave (CW) Path With:
Low Close-In Phase Noise of –159 dBc/Hz at 1-kHz Frequency Offset off 2.5-MHz Carrier
Phase Resolution: λ / 16
Supports 16x and 8x CW Clocks
12-dB Suppression of 3rd and 5th Harmonics
LVDS Interface With a Speed Up to 1 Gbps
Small Package: 15-mm × 15-mm NFBGA-289
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