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TI的12位高速模数转换器 ADS41B29IRGZt
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TI的12位高速模数转换器 ADS41B29IRGZt
12-Bit, 250MSPS, Ultralow-Power ADC with Analog Buffers
数据转换器 >模数转换器 >高速 ADC (>10MSPS) >12 位 250MSPS 缓冲低功耗 ADC/非常适合于 PA l线性化等多载波、大带宽通讯应用

说明
The ADS41B29/B49 are members of the ultralow-power ADS4xxx analog-to-digital converter (ADC) family, featuring integrated analog input buffers. These devices use innovative design techniques to achieve high dynamic performance, while consuming extremely low power. The analog input pins have buffers, with benefits of constant performance and input impedance across a wide frequency range. The devices are well-suited for multi-carrier, wide bandwidth communications applications such as PA linearization.

The ADS41B49/29 have features such as digital gain and offset correction. The gain option can be used to improve SFDR performance at lower full-scale input ranges, especially at high input frequencies. The integrated dc offset correction loop can be used to estimate and cancel the ADC offset. At lower sampling rates, the ADC automatically operates at scaled-down power with no loss in performance.

The devices support both double data rate (DDR) low-voltage differential signaling (LVDS) and parallel CMOS digital output interfaces. The low data rate of the DDR LVDS interface (maximum 500MBPS) makes it possible to use low-cost field-programmable gate array (FPGA)-based receivers. The devices have a low-swing LVDS mode that can be used to further reduce the power consumption. The strength of the LVDS output buffers can also be increased to support 50Ω differential termination.

The devices are available in a compact QFN-48 package and are specified over the industrial temperature range (–40°C to +85°C).

特性
ADS41B49: 14-Bit, 250MSPS
ADS41B29: 12-Bit, 250MSPS
Integrated High-Impedance
Analog Input Buffer:
Input Capacitance: 2pF
200MHz Input Resistance: 3kΩ
Maximum Sample Rate: 250MSPS
Ultralow Power:
1.8V Analog Power: 180mW
3.3V Buffer Power: 96mW
I/O Power: 135mW (DDR LVDS)
High Dynamic Performance:
SNR: 69dBFS at 170MHz
SFDR: 82.5dBc at 170MHz
Output Interface:
Double Data Rate (DDR) LVDS with Programmable Swing and Strength:
Standard Swing: 350mV
Low Swing: 200mV
Default Strength: 100Ω Termination
2× Strength: 50Ω Termination
1.8V Parallel CMOS Interface Also Supported
Programmable Gain for SNR/SFDR Trade-Off
DC Offset Correction
Supports Low Input Clock Amplitude
Package: QFN-48 (7mm × 7mm)

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TI的12位高速模数转换器 ADS41B29IRGZt
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