首页 > ADI 模拟器件公司 > 数据转换器 > 模数转换器ADC > 模数转换器

AD9246-125EB:  14-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V模数转换器

The AD9246 is a monolithic, single 1.8 V supply, 14-bit, 80 MSPS/ 105 MSPS/125 MSPS analog-to-digital converter (ADC), featuring a high performance sample-and-hold amplifier (SHA) and on-chip voltage reference. The product uses a multistage differential pipeline architecture with output error correction logic to provide 14-bit accuracy at 125 MSPS data rates and guarantees no missing codes over the full operating temperature range.

The wide bandwidth, truly differential SHA allows a variety of user-selectable input ranges and offsets, including single-ended applications. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. Combined with power and cost savings over previously available ADCs, the AD9246 is suitable for applications in communications, imaging, and medical ultrasound.

A differential clock input controls all internal conversion cycles. A duty cycle stabilizer (DCS) compensates for wide variations in the clock duty cycle while maintaining excellent overall ADC performance.

The digital output data is presented in offset binary, Gray code, or twos complement formats. A data output clock (DCO) is provided to ensure proper latch timing with receiving logic.

The AD9246 is available in a 48-lead LFCSP_VQ and is specified over the industrial temperature range (−40°C to +85°C)

AD9246是一款单芯片、1.8 V单电源供电的14-bit、80 MSPS/ 105 MSPS/125 MSPS模数转换器（ADC）,内置采样保持放大器（SHA）与片上基准电压源。AD9246采用带输出误差修正逻辑电路的多级差分流水线结构,以125MSPS的转换速率提供14bit精度,而且保证在整个工作温度范围内无失码。

宽带宽、真正的差分SHA允许各种用户可选择的输入范围与失调电压,包括单端应用。AD9246适合多通道系统中,在连续通道内进行满量程电压电平切换,以及在超过奈奎斯特速率的频率范围进行单通道采样输入。同以往的ADC相比,AD9246集低功耗与低成本于一体,非常适合通信、成像以及医疗超声应用。

差分时钟输入信号控制所有的内部转换周期。占空比稳定器（DCS）能够补偿时钟占空比的各种变化,同时保持出众的整体ADC性能。

数字输出数据以偏移二进制、格雷码或二进制补码形式进行显示。数据输出时钟（DCO）可用于确保带有接收逻辑的适当的锁存定时。

AD9246采用48引脚LFCSP_VQ封装,工作温度范围为：-40°C～+85°C

产品焦点 Product Highlights

1. The AD9246 operates from a single 1.8 V power supply and features a separate digital output driver supply to accommodate 1.8 V to 3.3 V logic families.
2. The patented SHA input maintains excellent performance for input frequencies up to 225 MHz.
3. The clock DCS maintains overall ADC performance over a wide range of clock pulse widths.
4. A standard serial port interface supports various product features and functions, such as data formatting (offset binary, twos complement, or Gray coding), enabling the clock DCS, power-down, and voltage reference mode.
5. The AD9246 is pin-compatible with the AD9233, allowing a simple migration from 12 bits to 14 bits.
6. AD9246采用1.8 V单电源供电,具有独立的数字输出驱动电源,符合1.8 V～3.3 V逻辑电路需求。
7. 获得专利的SHA输入在输入频率高至225 MHz时保持优良的性能。
8. 时钟DCS在较宽的时钟脉冲宽度范围内保持整体ADC性能。
9. 标准的串行端口接口支持各种产品特性与功能,如数据格式化（补码二进制、二进制补码或格雷码）、时钟DCS、断电以及电压基准模式、
10. AD9246与AD9233引脚兼容,允许从12 bit向14 bit的简单转换

产品应用领域 Applications

• Ultrasound equipment
• IF sampling in communications receivers IS-95, CDMA-One, IMT-2000
• Battery-powered instruments
• Hand-held scopemeters
• Low cost digital oscilloscopes
• 超声设备
• IS-95, CDMA-One, IMT-2000等通信接收机IF（中频）采样
• 电池供电的仪器仪表
• 手持式示波器
• 低成本数字示波器

AD9246-125EB 特点

• 1.8 V analog supply operation
• 1.8 V to 3.3 V output supply
• SNR = 71.7 dBc (72.7 dBFS) to 70 MHz input
• SFDR = 85 dBc to 70 MHz input
• Low power: 395 mW @ 125 MSPS
• Differential input with 650 MHz bandwidth
• On-chip voltage reference and sample-and-hold amplifier
• DNL = ±0.4 LSB
• Flexible analog input: 1 V p-p to 2 V p-p range
• Offset binary, Gray code, or twos complement data format
• Data output clock and clock duty cycle stabilizer
• Serial port control
  - Built-in selectable digital test pattern generation
  - Programmable clock and data alignment
• 1.8 V模拟电源供电
• 1.8 V～3.3 V输出电源
• 70 MHz输入时,信噪比（SNR） =
  71.7 dBc (72.7 dBFS)
• 70 MHz输入时,无杂散动态范围（SFDR） = 85 dBc
• 低功耗：395 mW @ 125 MSPS
• 650 MHz带宽的差分输入
• 内置基准电压源和采样保持放大器
• DNL = ±0.4 LSB
• 灵活的模拟输入：1 V p-p～2 V p-p范围
• 数据格式：偏移二进制、格雷码或二进制补码
• 数据输出时钟和时钟占空比稳定器
• 串行端口控制
  内建可选数字测试图案生成功能
  -可编程时钟和数据对准

AD9246 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD9246-105EB	Obs	EVALUATION BOARDS	48	工业
AD9246-125EB	Obs	EVALUATION BOARDS	48	工业
AD9246BCPZ-105	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业
AD9246BCPZ-125	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业
AD9246BCPZ-80	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业
AD9246BCPZRL7-105	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业
AD9246BCPZRL7-125	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业
AD9246BCPZRL7-80	Prodn	48 ld LFCSP (7x7x.85mm w/4.1mm Pad)	48	工业

AD9246-125EB 应用技术支持与电子电路设计开发资源下载

1. AD9246 数据手册DataSheet下载 . pdf
2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
3. ADC模数转换器选型指南 . pdf