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AD7453:  伪差分输入、555 kSPS、12位ADC,采用8引脚SOT-23封装

AD7453是一款12位、低功耗、逐次逼近型(SAR)模数转换器(ADC),采用伪差分模拟输入,工作电压为2.7 V至5.25 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。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。AD7453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 AD7453 is a 12-bit, low-power, successive-approximation (SAR) analog-to-digital converters that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 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 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.

AD7453 特点

• 低功耗（最大吞吐量时）：
  - 典型7 mW（555 kSPS、5 V电源）
  - 典型3 mW（555 kSPS、3 V电源）
• 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
• 额定电压(VDD)：2.7 V至5.25 V
• 伪差分模拟输入
• 无流水线延迟
• 高速串行接口： SPI®/QSPI™/MICROWIRE™/DSP 兼容
• 省电模式：最大1 µA
• 8引脚SOT-23封装
• Low Power at max Throughput Rate:
  - 7 mW typ at 555 kSPS with 5 V Supplies
  - 3 mW typ at 555 kSPS with 3 V Supplies
• Wide Input Bandwidth:- 70 dB SINAD at 100 kHz Input Frequency
• Flexible Power/Serial Clock Speed Management
• Specified for VDD of 2.7 V to 5.25 V
• Pseudo Differential Analog Input
• No Pipeline Delays
• High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
• Power-Down Mode: 1 µA max
• 8 Pin SOT-23 Package

AD7453 技术指标

• Resolution (Bits): 12bit
• # Chan: 1
• Sample Rate: 555kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• ADC Architecture: SAR
• Pkg Type: SOT

AD7453 建议配套产品

• Recommended Driver Amplifiers for the AD7453
  • For low noise, low distortion, we recommend the ADA4940-1 differential amplifier.
  • For low noise, low cost precision amplifiers, we recommend the AD8655 or the AD8603.
• Recommended Voltage References for the AD7453
  • For low noise, high accuracy, we recommend the ADR421 or the AD780, 2.5V reference.
• Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.
  • For selecting supervisor products, use the Supervisor Parametric Search.

AD7453 功能框图

AD7453 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7453ARTZ-REEL7	量产	8 ld SOT-23	8	工业
AD7453BRTZ-REEL7	量产	8 ld SOT-23	8	工业
EVAL-AD7453CB	量产	评估板	-	待定

AD7453 应用技术支持与电子电路设计开发资源下载

1. AD7453 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