AD7324: 软件可选的真双极性输入、4通道、12位（带符号位）A/D转换器
AD7324是一款4通道、12位带符号位的1 MSPS逐次逼近型ADC。该ADC配有一个高速串行接口，最高呑吐量可达1 MSPS。AD7324可处理真双极性模拟输入信号。AD7324可处理真双极性模拟输入信号。通过对片上范围寄存器编程，可借助软件来选择双极性范围。双极输入范围包括： ± 10V、 ± 5V和 ± 2.5V三种。AD7324还可处理0至10V的单极性输入范围，同样可通过软件选择。每个模拟输入通道均支持独立编程，通过设定范围寄存器中的相应位即可设为四个输入范围之一。模拟输入通道可配置为单端、全差分或伪差分三种模式之一。模拟输入则通过专门的控制寄存器位进行配置。AD7324含有一个通道序列器，可在各模拟输入通道间实现自动转换。这款ADC内置一个2.5V的基准电压，也可采用外部基准。如果在REFIN/OUT引脚上施加3V外部基准电压，该ADC则可处理± 12V真双极性模拟输入范围。对于该± 12V输入范围，需采用最低± 12V的VDD和VSS电源。
The AD7324 is a 4-Channel,12-Bit Plus Sign,1 MSPS Successive Approximation ADC. The ADC has a high speed serial interface that can operate at throughput rates up to 1 MSPS. The AD7324 can handle True Bipolar Analog input signals. The Bipolar ranges are software selectable by programming the on board Range Register. Bipolar input ranges include ± 10V, ± 5V, ± 2.5V. The AD7324 can also handle a 0 to 10 V uniploar input range, which is also software selectable. Each analog input channel can be independently programmed to one of the input ranges by setting the appropriate bits in the Range Register. The Analog Input Channels can be configured as Single-Ended, Fully Differential or Pseudo Differential. Dedicated Control Register bits are used to configure the Analog inputs. The 24 contains a Channel Sequencer, allowing automatic conversions between each analog input channel. The ADC contains a 2.5V Internal reference. The AD7324 also allows for external Reference operation. If a 3V external reference is applied to the REFIN/OUT pin, the ADC can handle a True Bipolar ± 12 V Analog input range. Minimum VDD and VSS supplies of ± 12V are required for this ± 12 V input range.
AD7324 特点
- 12位带符号位SAR ADC
- 真双极性输入范围
- 软件可选输入范围：± 10V、± 5V、± 2.5V、0至10V
- 四个带通道序列器的模拟输入
- 支持单端、真差分和伪差分模拟输入三种模式
- 高速串行接口 – 1 MSPS 呑吐量
- 低功耗：26mW
- 全功率信号带宽： >13 MHz
- 2.5 V内部基准电压
- 高速串行接口
- 有关8通道和2通道等效器件，请分别参阅AD7328和AD7322
- 12-Bit Plus Sign SAR ADC
- True Bipolar Input Ranges
- Software Selectable Input Ranges ± 10V, ± 5V, ± 2.5V, 0 to 10V
- Four Analog Inputs with Channel Sequencer
- Single Ended, True Differential and Pseudo Differential Analog Input Capability
- High Speed Serial Interface - 1 MSPS Throughput
- Low Power: 26mW
- Full Power Signal Bandwidth: >13 MHz
- Internal 2.5 V Reference
- High Speed Serial Interface
- For eight and two channel equivalent devices, see AD7328 and AD7322 respectively
AD7324 技术指标
- Resolution (Bits): 13bit
- # Chan: 4
- Sample Rate: 1MSPS
- Interface: Ser,SPI
- Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
- Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref) x 4,Uni 10V
- ADC Architecture: SAR
- Pkg Type: SOP
AD7324 建议配套产品
- Recommended Input Buffer Amplifiers for the AD7324
- For low noise and low power applications, we recommend the ADA4841-1, ADA4932-1, the dual ADA4841-2, or the low cost AD8137.
- For low noise and high frequency, we recommend the AD8021, ADA4899-1 or the dual AD8022.
- For low noise and low frequency at high supply voltages( up to +-18V), we suggest the AD8597, ADA4627-1 or the dual AD8599.
- For low noise and low frequency applications at medium supply voltages( up to +-13V), we suggest the AD8610, or the dual AD8620.
- Recommended External References for the AD7324
- Recommended Power Solutions
- For selecting voltage regulator products, use ADIsimPower.
- For selecting supervisor products, use the Supervisor Parametric Search.
AD7324 功能框图
AD7324 芯片订购指南
| 产品型号 | 产品状态 | 封装 | Pins | 报价* (1000 pcs.) |
|---|---|---|---|---|
| AD7324BRUZ | Prodn | 16 ld TSSOP | 16 | $ 5.75 |
| AD7324BRUZ-REEL | Prodn | 16 ld TSSOP | 16 | $ 5.75 |
| AD7324BRUZ-REEL7 | Prodn | 16 ld TSSOP | 16 | $ 5.75 |
| EVAL-AD7324CBZ | Prodn | EVALUATION BOARDS | - | $ 150.00 |