AD9245: 14位、20 MSPS/40 MSPS/65 MSPS/80 MSPS、3 V ADC
AD9245是一款单芯片、14位、20 MSPS/40 MSPS/65 MSPS/80 MSPS模数转换器(ADC),采用3 V单电源供电,内置一个高性能采样保持放大器(SHA)和基准电压源。它采用多级差分流水线架构,内置输出纠错逻辑,可提供14位精度,并保证在整个工作温度范围内无失码。利用宽带宽、真差分采样保持放大器(SHA),用户可以选择包括单端应用在内的各种输入范围和共模模式。该器件适用于在连续通道中切换满量程电平的多路复用系统,以及采用远超过Nyquist速率的频率对单通道输入进行采样。与以前的模数转换器相比,AD9245的功耗与成本均有所降低,适用于通信、成像和医疗超声等应用。采用一个单端时钟输入来控制所有内部转换周期。一个占空比稳定器(DCS)用来补偿较大的时钟占空比波动,同时保持出色的ADC总体性能。数字输出数据格式为标准二进制或二进制补码。超量程(OTR)信号表示溢出状况,可由最高有效位来确定是下溢还是上溢。AD9245采用先进的CMOS工艺制造,提供32引脚LFCSP封装,额定温度范围为-40°C至+85°C工业温度范围。
AD9245 特点
- 3 V单电源供电(2.7 V至3.6 V)
- 信噪比(SNR):72.7 dBc(至Nyquist频率、80 MSPS)
- 无杂散动态范围(SFDR):83.0 dBc(至Nyquist频率、80 MSPS)
- 低功耗
366 mW(80 MSPS)
300 mW(65 MSPS)
165 mW(40 MSPS)
90 mW(20 MSPS)
- 差分输入、500 MHz带宽
- 片内基准电压源和采样保持
- 微分非线性(DNL):±0.5 LSB (80 MSPS)
- 灵活的模拟输入范围:1 V p-p至2 V p-p
- 数据格式:偏移二进制或二进制补码
- 时钟占空比稳定器
- Single 3 V supply operation (2.7 V to 3.6 V)
- SNR = 72.7 dBc to Nyquist at 80 MSPS
- SFDR = 83.0 dBc to Nyquist at 80 MSPS
- Low power
366 mW at 80 MSPS
300 mW at 65 MSPS
165 mW at 40 MSPS
90 mW at 20 MSPS
- Differential input with 500 MHz bandwidth
- On-chip reference and sample-and-hold
- DNL = ±0.5 LSB at 80 MSPS
- Flexible analog input: 1 V p-p to 2 V p-p range
- Offset binary or twos complement data format
- Clock duty-cycle stabilizer
AD9245 技术指标
- Resolution (Bits): 14bit
- # Chan: 1
- Sample Rate: 80MSPS
- Interface: Par
- Analog Input Type: Diff-Uni,SE-Uni
- Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
- ADC Architecture: Pipelined
- Pkg Type: CSP
AD9245 亮点
- AD9245采用3 V单电源供电,而数字输出驱动器采用一个独立的电源供电,以适应2.5 V和3.3 V逻辑产品系列。
- 取得专利的SHA输入在最高100 MHz的输入频率下仍保持出色的性能,并且可以针对单端或差分操作进行配置。
- AD9245与AD9215、AD9235和AD9236引脚兼容,因而10位、20 MSPS产品可轻松升级至14位、80 MSPS产品。
- 时钟占空比稳定器(DCS)在较宽的时钟脉冲宽度范围内仍保持ADC的整体性能。
- OTR输出位可提示超过选定输入范围的信号。
- The AD9245 operates from a single 3 V power supply and features a separate digital output driver supply to accommodate 2.5 V and 3.3 V logic families.
- The patented SHA input maintains excellent performance for input frequencies up to 100 MHz and can be configured for single-ended or differential operation.
- The AD9245 is pin-compatible with the AD9215, AD9235, and AD9236. This allows a simplified migration from 10 bits to 14 bits and 20 MSPS to 80 MSPS.
- The clock DCS maintains overall ADC performance over a wide range of clock pulse widths.
- The OTR output bit indicates when the signal is beyond the selected input range.
AD9245 应用领域
- 医疗成像设备
- 使用IF采样的通信接收机
WCDMA、CDMA-One、CDMA-2000和TDS-CDMA
- 电池供电仪表
- 手持式示波表
- 频谱分析仪
- 对功耗敏感的军事应用
- Medical imaging equipment
- IF sampling in communications receivers WCDMA, CDMA-One, CDMA-2000, and TDS-CDMA
- Battery-powered instruments
- Hand-held scopemeters
- Spectrum analyzers
- Power-sensitive military applications
AD9245 功能框图
AD9245 芯片订购指南
产品型号 |
产品状态 |
封装 |
Pins |
报价*
(1000 pcs.) |
AD9245BCP-20EB |
上次购货时间 |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-20EBZ |
Prodn |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-40EB |
上次购货时间 |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-40EBZ |
Prodn |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-65EB |
上次购货时间 |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-65EBZ |
Prodn |
EVALUATION BOARDS |
32 |
$ 202.40 |
AD9245BCP-80EB |
上次购货时间 |
Evaluation Boards |
- |
$ 202.40 |
AD9245BCP-80EBZ |
Prodn |
EVALUATION BOARDS |
- |
$ 202.40 |
AD9245BCPRL7-80 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 36.74 |
AD9245BCPZ-20 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 11.01 |
AD9245BCPZ-40 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 15.92 |
AD9245BCPZ-65 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 23.23 |
AD9245BCPZ-80 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 31.37 |
AD9245BCPZRL7-20 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 11.01 |
AD9245BCPZRL7-40 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 15.92 |
AD9245BCPZRL7-65 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 23.23 |
AD9245BCPZRL7-80 |
Prodn |
32 ld LFCSP (5x5mm CP-32-2) |
32 |
$ 33.40 |
AD9245 应用技术支持与电子电路设计开发资源下载
- AD9245 数据手册DataSheet下载 .pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf