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AD7812: 10位、8通道、350 kSPS、串行ADC

AD7811AD7812均为高速、低功耗、10位模数转换器(ADC),采用2.7 V至5.5 V单电源供电。这些器件内置一个2.3 微秒(us)逐次逼近型模数转换器、一个片内采样保持放大器、一个2.5 V片内基准电压源和一个高速串行接口,该串行接口与大多数数字信号处理器(DSP)和微控制器的串行接口兼容。用户也可选择采用外部基准电压,将它与VREF引脚相连,并在控制寄存器中设置EXTREF位。VREF引脚可与VDD引脚相连。吞吐量较低时,可以利用省电模式在转换之间自动关断。

利用AD7811和AD7812的控制寄存器,可以将输入通道配置为单端或伪差分输入。该控制寄存器还具有软件转换启动与软件关断特性。两个此类器件可以共享同一串行总线,并可以在多封装应用中通过器件地址引脚硬连线分别寻址。AD7811提供三种封装:16引脚、0.3英寸宽、小型塑料双列直插式封装(小型DIP);16引脚、0.15英寸宽、小形集成封装(SOIC);以及16引脚超薄紧缩小型封装(TSSOP)。AD7812也提供三种封装:20引脚、0.3英寸宽、小型塑料双列直插式封装(小型DIP);20引脚、小形集成封装(SOIC);以及20引脚超薄紧缩小型封装(TSSOP)。

The AD7811 and AD7812 are high speed, low power, 10-bit A/D converters that operate from a single 2.7 V to 5.5 V supply. The devices contain a 2.3 us successive approximation A/D converter, an on-chip track/hold amplifier, a 2.5 V on-chip reference and a high speed serial interface that is compatible with the serial interfaces of most DSPs (Digital Signal Processors) and microcontrollers. The user also has the option of using an external reference by connecting it to the VREF pin and setting the EXTREF bit in the control register. The VREF pin may be tied to VDD. At slower throughput rates the power-down mode may be used to automatically power down between conversions.

The control registers of the AD7811 and AD7812 allow the input channels to be configured as single-ended or pseudo differential. The control register also features a software convert start and a software power-down. Two of these devices can share the same serial bus and may be individually addressed in a multipackage application by hardwiring the device address pin. The AD7811 is available in a small, 16-lead 0.3" wide, plastic dual-in-line package (mini-DIP), in a 16-lead 0.15" wide, small outline IC (SOIC) and in a 16-lead, Thin Shrink Small Outline Package (TSSOP). The AD7812 is available in a small, 20-lead 0.3" wide, plastic dual-in-line package (mini-DIP), in a 20-lead, small outline IC (SOIC) and in a 20-lead, Thin Shrink Small Outline Package (TSSOP).

AD7812 特点
AD7812 技术指标
AD7812 功能框图

AD7812 芯片订购指南

产品型号 产品状态 封装 引脚 温度范围
AD7812WYRUZ 量产 20 ld TSSOP 20 商业
AD7812YNZ 量产 20 ld PDIP 20 商业
AD7812YR 量产 20 ld SOIC - Wide 20 商业
AD7812YR-REEL 量产 20 ld SOIC - Wide 20 商业
AD7812YR-REEL7 量产 20 ld SOIC - Wide 20 商业
AD7812YRU 量产 20 ld TSSOP 20 商业
AD7812YRU-REEL7 量产 20 ld TSSOP 20 商业
AD7812YRUZ 量产 20 ld TSSOP 20 商业
AD7812YRUZ-REEL 量产 20 ld TSSOP 20 商业
AD7812YRUZ-REEL7 量产 20 ld TSSOP 20 商业
AD7812YRZ 量产 20 ld SOIC - Wide 20 商业
AD7812YRZ-REEL 量产 20 ld SOIC - Wide 20 商业
AD7812YRZ-REEL7 量产 20 ld SOIC - Wide 20 商业
AD7812 应用技术支持与电子电路设计开发资源下载
  1. AD7812 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