AD7452 差分输入、555 kSPS、12位ADC,采用8引脚SOT-23封装

AD7452: 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.

AD7452 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®/QSPI™/MICROWIRE™/DSP 兼容
省电模式：最大1 µA
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®/QSPI™/MICROWIRE™/DSP Compatible
Power-Down Mode: 1 µA max
8 Pin SOT-23 Package

AD7452 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

AD7452 建议配套产品

Recommended Driver Amplifiers for the AD7452
- For ultra low distortion, low power differential amplifier, we recommend the ADA4940-1.
- For low noise, low cost, precision amplifier, we recommend the AD8655 or the dual AD8656.
Recommended Precision Voltage References for the AD7452
- For a 2.5V/3V reference, we recommend the AD780.
- For a 2.5V reference, we recommend the ADR421 or the ADR441.
- For a 2.048V reference, we recommend the ADR420 or the ADR440.
Recommended Power Solutions
- For selecting voltage regulator products, use ADIsimPower.
- For selecting supervisor products, use the Supervisor Parametric Search.

AD7452 功能框图

AD7452 芯片订购指南

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