AD9251:14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter

AD9251 功能框图 The AD9251 is a monolithic, dual-channel, 1.8 V supply, 14-bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS analog-to-digital converter (ADC). It features a high performance sample-and-hold circuit and on-chip voltage reference.The product uses multistage differential pipeline architecture with output error correction logic to provide 14-bit accuracy at 80 MSPS data rates and to guarantee no missing codes over the full operating temperature range.The ADC contains several features designed to maximize flexibility and minimize system cost, such as programmable clock and data alignment and programmable digital test pattern generation. The available digital test patterns include built-in deterministic and pseudorandom patterns, along with custom user-defined test patterns entered via the serial port interface (SPI).A differential clock input controls all internal conversion cycles. An optional 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 format. A data output clock (DCO) is provided for each ADC channel to ensure proper latch timing with receiving logic. Both 1.8 V and 3.3 V CMOS levels are supported and output data can be multiplexed onto a single output bus.The AD9251 is available in a 64-lead RoHS Compliant LFCSP and is specified over the industrial temperature range (−40°C to +85°C).

AD9251 特点

1.8 V analog supply operation
1.8 V to 3.3 V output supply
SNR
74.3 dBFS at 9.7 MHz input
71.5 dBFS at 200 MHz input
SFDR
93 dBc at 9.7 MHz input
80 dBc at 200 MHz input
Low power
33 mW per channel at 20 MSPS
73 mW per channel at 80 MSPS
Differential input with 700 MHz bandwidth
On-chip voltage reference and sample-and-hold circuit
DNL = ±0.45 LSB
Please see data sheet for additional features

AD9251 亮点

The AD9251 operates from a single 1.8 V analog power supply and features a separate digital output driver supply to accommodate 1.8 V to 3.3 V logic families.
The patented sample-and-hold circuit maintains excellent performance for input frequencies up to 200 MHz and is designed for low cost, low power, and ease of use.
A standard serial port interface supports various product features and functions, such as data output formatting, internal clock divider, power-down, DCO/DATA timing and offset adjustments, and voltage reference modes.
The AD9251 is packaged in a 64-lead RoHS compliant LFCSP that is pin compatible with the AD9268 16-bit ADC, the AD9258 14-bit ADC, the AD9231 12-bit ADC, and the AD9204 10-bit ADC, enabling a simple migration path between 10-bit and 16-bit converters sampling from 20 MSPS to 125 MSPS.

AD9251 技术指标

Resolution (Bits): 14bit
# Chan: 2
Sample Rate: 80MSPS
Interface: Par
Analog Input Type: Diff-Uni
Ain Range: (2Vref) p-p,2 V p-p
ADC Architecture: Pipelined
Pkg Type: CSP

AD9251 应用领域

Communications
Diversity Radio systems
Multimode digital receivers :GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
Battery-powered instruments
Hand-held scope meters
Portable medical imaging
Ultrasound
Radar/LIDAR

AD9251 建议配套产品

推荐AD9251使用的驱动放大器
- 对于差分RF/IF应用，推荐使用ADL5561 或超低失真 ADL5562。
- 对于直流耦合输入，推荐使用ADA4937-2 或 ADA4938-2。
推荐AD9251使用的VGA

针对独立的双通道、数字控制VGA，推荐使用AD8372。

针对超低失真、IF双通道VGA，推荐使用AD8376。

推荐AD9251使用的时钟驱动器

如需低抖动性能，推荐使用AD9510 、 AD9511 、 AD9512 、 AD9513 、 AD9514 、 AD9515 、 AD9516-0 系列多路输出时钟。

如需低抖动性能和集成VCO，推荐使用AD9520-0 和 AD9522-0。

推荐电源解决方案

欲选择电压调节器产品，请使用ADIsimPower。

欲选择电源监控器产品，请使用电源监控器参数搜索。

AD9251 芯片订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
AD9251-20EBZ 产品状态: 量产	评估板	-	工业	1	$ 200.00	$ 200.00	是
AD9251-40EBZ 产品状态: 量产	评估板	-	工业	1	$ 200.00	$ 200.00	是
AD9251-65EBZ 产品状态: 量产	评估板	-	工业	1	$ 200.00	$ 200.00	是
AD9251-80EBZ 产品状态: 量产	评估板	56	工业	1	$ 200.00	$ 200.00	是
AD9251BCPZ-20 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Tray, 260	$ 21.76	$ 18.50	是
AD9251BCPZ-40 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Tray, 260	$ 28.10	$ 23.89	是
AD9251BCPZ-65 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Tray, 260	$ 41.18	$ 35.00	是
AD9251BCPZ-80 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Tray, 260	$ 44.12	$ 37.50	是
AD9251BCPZRL7-20 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Reel, 750	$ 21.76	$ 18.50	是
AD9251BCPZRL7-40 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Reel, 750	$ 28.10	$ 23.89	是
AD9251BCPZRL7-65 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Reel, 750	$ 41.18	$ 35.00	是
AD9251BCPZRL7-80 产品状态: 量产	64 ld LFCSP (9x9mm, 6.20mm exposed pad)	64	工业	Reel, 750	$ 44.12	$ 37.50	是