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參數(shù)資料
| 型號： | MAX2079CXE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 41/49頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OCT ULTRASOUND RCVR 144CTBGA |
| 標準包裝： | 1,000 |
| 系列： | * |
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Low-Power, High-Performance, Fully Integrated
Octal Ultrasound Receiver (Octal LNA, VGA,
AAF, ADC, and CWD Beamformer)
MAX2079
46
Maxim Integrated
5) To program new CWD phase information, turn off the
mixer clock and/or set LOON low and repeat steps 1–5.
6) For switching between VGA and CWD modes without
reprogramming the SPI registers (fast-mode switch-
ing): When changing from CWD mode to VGA mode,
nothing needs to be done to maintain the AFE pro-
gramming settings. When switching from VGA mode
to CWD mode, the user must provide a CS pulse after
the CWD pin goes high to initialize the CWD beam-
former phase registers. This pulse must occur 100ns
or more after the rising edge of the CWD pin, and
must be at least 80ns in width.
Applications Information
Ultrasound-Specific IMD3 Specification
Unlike typical communications applications, the two input
tones are not equal in magnitude for the ultrasound-
specific IMD3 two-tone specification. In this measure-
ment, f1 represents reflections from tissue and f2 rep-
resents reflections from blood. The latter reflections are
typically 25dB lower in magnitude. IM3 performance for
the device is measured with the smaller tone at -25dBc in
order to more accurately resolve the small IM3 products
over the thermal noise floor. The IMD3 product of interest
(f1 - (f2 - f1)) presents itself as an undesired Doppler error
signal in ultrasound applications (see Figure 22).
Figure 22. Ultrasound-Specific IMD3
ULTRASOUND IMD3
-25dB
f1 - (f2 - f1)f2 + (f2 - f1)
f1
f2
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| MAX207CAG | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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| MAX207CAG-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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