AD7262:1 MSPS、12位、同步采样SAR ADC，内置可编程增益放大器(PGA)及4个比较器

AD7262: 1 MSPS、12位、同步采样SAR ADC，内置可编程增益放大器(PGA)及4个比较器

AD7262 功能框图 AD7262/AD7262-5是12位双通道、高速、低功耗的逐次逼近型ADC，采用5 V单电源供电。AD7262每个片内ADC的吞吐速率最高可达1 MSPS。AD7262-5的吞吐速率最高可达500 kSPS。具备两个完整的ADC功能，可以实现两个通道同时采样和转换。每个ADC前置的可编程增益放大器(PGA)可以接收真差分模拟输入信号，并且支持14个增益设置：×1、×2、×3、×4、×6、×8、×12、×16、×24、×32、×48、×64、×96和×128。AD7262/AD7262-5内置4个比较器。比较器A和比较器B针对低功耗进行了优化，而比较器C和比较器D则具有快速传播延迟。AD7262/AD7262-5提供校准功能，可消除器件失调误差，并具有可编程增益调整寄存器，允许对输入路径（如传感器）的失调和增益进行补偿。AD7262/AD7262-5内置2.5 V片内基准电压源，需用外部基准电压源时，可禁用此片内基准电压源。AD7262/AD7262-5非常适合监控来自各种传感器的小幅度信号，具有监控来自电机控制系统中各种模拟编码器的位置反馈信号所需的全部功能。

The AD7262/AD7262-5 are dual, 12-bit, high speed, low power, successive approximation ADCs that operate from a single 5 V power supply. The AD7262 features throughput rates of up to 1 MSPS per on-chip ADC. The AD7262-5 features throughput rates of up to 500 kSPS. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128.The AD7262/AD7262-5 contain four comparators. Comparator A and Comparator B are optimized for low power, while Compara-tor C and Comparator D have fast propagation delays. The AD7262/AD7262-5 feature a calibration function to remove any device offset error and programmable gain adjust registers to allow for input path (for example, sensor) offset and gain compensation. The AD7262/AD7262-5 have an on-chip 2.5 V reference that can be disabled if an external reference is preferred.The AD7262/AD7262-5 are ideally suited for monitoring small amplitude signals from a variety of sensors. They include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.

AD7262 特点

双核12位同步采样双通道ADC
真差分模拟输入
可编程增益级：
×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128
每个ADC的吞吐速率
AD7262：1 MSPS
AD7262-5：500 kSPS
模拟输入阻抗：>1 GΩ
宽输入带宽−3 dB带宽：1.7 MHz（G = 2时）
4个片内比较器
欲了解更多特性，请参考数据手册

Dual simultaneous sampling 12-bit, 2-channel ADC
True differential analog inputs
Programmable gain stage:
×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128
Throughput rate per ADC
1 MSPS for AD7262
500 kSPS for AD7262-5
Analog input impedance: >1 GΩ
Wide input bandwidth−3 dB bandwidth: 1.7 MHz at gain = 2
4 on-chip comparators
Please see data sheet for additional features

AD7262 技术指标

Resolution (Bits): 12bit
# Chan: 2
Sample Rate: 1MSPS
Interface: Ser,SPI
Analog Input Type: Diff-Uni
Ain Range: (2Vref) p-p,5V p-p
ADC Architecture: SAR
Pkg Type: CSP,QFP

AD7262 亮点

集成PGA支持多种灵活的增益设置，允许检测和转换低电平模拟信号。
每个PGA后接一个双通道同步采样ADC，AD7262每个ADC的吞吐速率高达1 MSPS。两个ADC的转换结果可通过独立的数据线路同时获得，或如果仅有一个串行端口可用，则通过一条数据线路先后获得。
4个集成比较器可用于计数来自电机控制应用中极点传感器的信号。
2.5 V内部基准电压源。

AD7262 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
AD7262BCPZ 产品状态: 量产	48 ld LFCSP 7x7mm (5.25EP)	48	工业	Tray, 260	$ 6.47	$ 5.50
AD7262BCPZ-5 产品状态: 量产	48 ld LFCSP 7x7mm (5.25EP)	48	工业	Tray, 260	$ 4.82	$ 4.10
AD7262BCPZ-5-RL7 产品状态: 量产	48 ld LFCSP 7x7mm (5.25EP)	48	工业	Reel, 750	$ 4.82	$ 4.10
AD7262BCPZ-RL7 产品状态: 量产	48 ld LFCSP 7x7mm (5.25EP)	48	工业	Reel, 750	$ 6.47	$ 5.50
AD7262BSTZ 产品状态: 量产	48 ld LQFP	48	工业	Tray, 250	$ 6.47	$ 5.50
AD7262BSTZ-5 产品状态: 量产	48 ld LQFP	48	工业	Tray, 250	$ 4.82	$ 4.10
AD7262BSTZ-5-RL7 产品状态: 量产	48 ld LQFP	48	工业	Reel, 500	$ 4.82	$ 4.10
AD7262BSTZ-RL7 产品状态: 量产	48 ld LQFP	48	工业	Reel, 500	$ 6.47	$ 5.50