The AD9234 is a dual-channel, 12-bit, 1 GSPS/500 MSPS ADC. The device has built-in on-chip buffers and sample hold circuitry designed for low power consumption, small size, and ease of use. This product is used to sample wide-bandwidth analog signals. The AD9234 is optimized for wide input bandwidth, high sample rate, excellent linearity, and low power consumption in a small package.
This dual-channel ADC core adopts a multi-level, differential pipeline architecture and integrates output error correction logic. Each ADC has a wide bandwidth buffered input that supports a variety of user-selectable input ranges. Integrated voltage reference simplifies design. The data outputs of each ADC are internally connected to an optional 2-way clock. The AD9234 has a variety of built-in features that simplify the Automatic Gain Control (AGC) function in the communications receiver.
Using the ADC's fast detection output bit, the programmable threshold detector monitors the input signal power. If the input signal level exceeds the programmable threshold, the quick detection indicator becomes high. Because the threshold indicator has a very low latency, users can quickly adjust down the system gain to avoid over-range at the ADC input. In addition to fast detection outputs, the AD9234 also has signal monitoring capabilities. The signal monitoring module provides additional information about the ADC to digitally process the signal.
The high-speed serial outputs of JESD204B subclass 1 can be configured in single, dual, or quad channels, depending on the acceptable channel rate of the receiving logic and the sample rate of the ADC. Multi-device synchronization support is available via SYSREF± and SYNCINB ± input pins.
The AD9234 has flexible power-down options that significantly reduce power consumption when needed. These features are programmable via a 1.8 V to 3.3 V three-wire SPI.
The AD9234 is available in a 64-pin lead-free LFCSP package and is rated for an industrial temperature range of −40 °C to +85 °C. The product is protected by a U.S. patent.
Product features:
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低功耗模拟内核，12位、1.0 GSPS双通道analog-to-digital converter(ADC)，每通道1.5 W。
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较宽的全功率带宽，支持高达2 GHz的IF信号采样。
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提供可编程输入端的缓冲输入简化了滤波器设计和实施。
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灵活的串行端口接口(SPI)控制各种产品特性和功能，满足特定系统要求。
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可编程快速超量程检测。
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9 mm × 9 mm、64引脚LFCSP。
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引脚兼容AD9680 14位、1 GSPS双通道ADC。