AFE58JD28
- 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
- TGC Mode: 102 mW/Ch at 0.8 nV/√Hz,
- 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
- Digital I/Q Demodulator:
- Fractional Decimation Filter M = 1 to 63 With Increments of 0.25
- Data Throughput Reduction After Decimation
- On-Chip RAM With 32 Preset Profiles
- LVDS Interface With a Speed Up to 1 Gbps
- 5-Gbps JESD Interface:
- JESD204B Subclass 0, 1, and 2
- 2, 4, or 8 Channels per JESD Lane
- Small Package: 15-mm × 15-mm NFBGA-289
The AFE58JD28 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 AFE58JD28 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 10 MHz 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 80 MSPS 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 AFE58JD28 additionally includes a digital demodulator and JESD204B data packing blocks. The digital in-phase and quadrature (I/Q) demodulator with programmable decimation filters accelerates computationally-intensive algorithms at low power. The device also supports an optional JESD204B interface that runs up to 5 Gbps and further reduces the circuit-board routing challenges in high-channel count systems.
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 the AFE5818 and AFE5816 family.
추가 정보 요청
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기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | AFE58JD28 16-Channel Ultrasound AFE with 102-mW/Channel Power, 0.8-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, Digital Demodulator, JESD or LVDS Interface, and Passive CW Mixer datasheet | PDF | HTML | 2017/07/28 |
| Application note | Understanding CW Mode for Ultrasound AFE Devices | 2017/07/17 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
AFE58JD28EVM — AFE58JD28 디지털 디모듈레이터 및 JESD 또는 LVDS 인터페이스를 갖춘 16채널 초음파 AFE 평가 모듈
AFE58JD28은 뛰어난 성능과 작은 크기가 필요한 초음파 시스템을 위해 특별히 설계된 고집적 아날로그 프론트 엔드(AFE) 솔루션입니다. 이 장치는 완전한 타임 게인 제어(TGC) 영상 경로와 연속파 도플러(CWD) 경로를 통합하였습니다. 16채널 장치는 TI의 최저 전력 솔루션이며 최적의 시스템 성능을 위해 다양한 전력 및 잡음 조합을 지원합니다. 따라서 AFE58JD28은 고급형 및 휴대형 시스템에 적합한 초음파 AFE 솔루션입니다.
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| NFBGA (ZAV) | 289 | Ultra Librarian |
주문 및 품질
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- MTBF/FIT 예측
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