AD7452BRTZ-REEL7: 差分输入、555 kSPS、12位ADC,采用8引脚SOT-23封装
AD7452是一款12位、低功耗、逐次逼近型(SAR)模数转换器(ADC),采用全差分模拟输入,工作电压为3 V或5 V单电源,最高吞吐量为555 kSPS。
该器件内置一个低噪声、宽带宽、差分采样保持(T/H)放大器,可处理1 MHz以上的输入频率,-3 dB带宽典型值为20 MHz。外部基准电压通过VREF引脚输入,可在100 mV至3.5 V范围内变化,具体取决于电源和应用。基准电压值决定器件的共模电压范围。利用这一真差分输入结构和可变基准电压输入,用户可以选择各种输入范围和偏置点。
转换过程和数据采集通过 CS与串行时钟进行控制,从而为器件与微处理器或DSP接口创造了条件。输入信号在 CS的下降沿进行采样,而转换同时在此处启动。该器件采用SAR架构,确保无流水线延迟。AD7452采用先进的设计技术,可在高吞吐量的情况下实现极低的功耗
The AD7452 is a 12- bit, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 555 kSPS.
The part contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H), which can handle input frequencies in excess of 1 MHz with the -3 dB point being 20 MHz typically. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.
The conversion process and data acquisition are controlled using CS and the serial clock allowing the device to interface with Microprocessors or DSPs. The input signals are sampled on the falling edge of CS and the conversion is also initiated at this point.
AD7452BRTZ-REEL7 特点
- 额定电压(VDD)：3 V和 5V
- 低功耗（最大吞吐量时）：
- 最大7.25 mW（555 kSPS、5 V电源）
- 最大3.3 mW（555 kSPS、3 V电源） - 全差分模拟输入
- 宽输入带宽：
- 70 dB信纳比（100 kHz输入频率） - 灵活的功耗/串行时钟速度管理
- 无流水线延迟
- 高速串行接口： SPI(R)/QSPITM/MICROWIRETM/DSP 兼容
- 省电模式：最大1 uA
- 8引脚SOT-23封装
- Specified for VDD of 3 V and 5V
- Low Power at max Throughput Rate:
- 7.25 mW max at 555 kSPS with 5 V Supplies
- 3.3 mW max at 555 kSPS with 3 V Supplies - Fully Differential Analog Input
- Wide Input Bandwidth:
- 70 dB SINAD at 100 kHz Input Frequency - Flexible Power/Serial Clock Speed Management
- No Pipeline Delays
- High Speed Serial Interface SPI(R)/QSPITM/MICROWIRETM/DSP Compatible
- Power-Down Mode: 1 uA max
- 8 Pin SOT-23 Package
AD7452BRTZ-REEL7 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7452BRTZ-R2 | 量产 | 8 ld SOT-23 | 8 | 工业 |
| AD7452BRTZ-REEL7 | 量产 | 8 ld SOT-23 | 8 | 工业 |
| EVAL-AD7452CB | 量产 | 评估板 | - | 待定 |
AD7452BRTZ-REEL7 应用技术支持与电子电路设计开发资源下载
- AD7452 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