Texas Instruments AFE5832LP Low-Power Analog Front End (AFE)
Texas Instruments AFE5832LP Low-Power Analog Front End (AFE) is a highly integrated AFE solution specifically designed for portable ultrasound systems where high performance, low power, and small size are required. The Texas Instruments AFE5832LP is realized through a multichip module (MCM) with one VCA die and one ADC die. The VCA die has 32 channels that interface with the 16 channels of the ADC die. Each ADC channel alternately converts an odd and an even VCA channel.
Features
- 32-channel AFE for ultrasound applications
- LNA, attenuator, LPF, ADC, and CW Mixer
- Digital Time Gain Compensation (DTGC)
- 0 dB to 48dB total gain range
- Low-Noise Amplifier (LNA) with programmable gain
- Low current noise of 1pA/rtHz
- 21dB, 18dB, and 15dB gain
- A linear input range of up to 700mVPP
- Programmable Attenuator (ATTEN)
- 0 to 36dB attenuation range (steps of 0.125dB)
- Digital TGC engine
- Programmable Gain Amplifier (PGA)
- 21dB, 24dB, and 27dB gain
- Third-order, linear-phase, Low-Pass Filter (LPF)
- Cut-off frequency from 10MHz to 25MHz
- 16 ADCs converting at 12-bit, 80MSPS or 10-bit, 100MSPS
- Each ADC converts two sets of inputs at half rate
- 12-bit mode: 72dBFS SNR
- 10-bit mode: 61dBFS SNR
- TGC mode power
- Lowest power of 18.5mW/Ch in low power mode, 4nV/rtHz, 10-bit, 20MSPS, LVDS (2x rate)
- 27.8mW/Ch at 3nV/rtHz in low noise mode at 12-bit, 40MSPS
- 24.4mW/Ch at 4nV/rtHz in low power mode at 12-bit, 40MSPS
- Excellent device-to-device gain matching
- ±0.5dB (typical)
- Harmonic distortion of –55dBc level
- Fast and consistent overload recovery
- Continuous Wave (CW) path with
- Low close-in phase noise of –148dBc/Hz at 1kHz frequency offset off 5MHz carrier
- Power consumption with no signal: 10mW/Ch
- Phase resolution: λ/16
- 12dB suppression on third and fifth harmonics
- LVDS interface with a speed of up to 1Gbps
- 15mm×15mm NFBGA-289 small package
Applications
- Medical ultrasound imaging
- Nondestructive evaluation equipment
- Sonar imaging equipment
- In-probe electronics
Simplified Block Diagram
Paskelbta: 2019-02-06
| Atnaujinta: 2023-06-19