AD2S90: 低成本、完整的12位旋变数字转换器
AD2S90是一款完整的12位分辨率旋变数字转换器，无需外部元件便可工作。转换器的SIN、COS和REF输入端允许输入2 V rms ± 10%、频率为3 kHz至20 kHz范围内的信号。Type II伺服环路用于跟踪输入信号，并将SIN和COS输入端的信息转换为输入角度所对应的数字量。转换器的带宽内部设置为1 kHz。12位分辨率时最大跟踪速率为375 rps。角位置输出信息以两种形式提供：绝对串行二进制和增量式A quad B。绝对串行二进制输出为12位(1/4096)。当片选CS为逻辑高电平时，数据输出引脚为高阻态，从而允许将多个转换器连接到同一条总线。串行纯二进制形式的绝对角度信息先由CS访问，然后施加一个最大速率为2 MHz的外部时钟(SCLK)。编码器仿真输出A、B和NM连续产生相当于一个1024线编码器的信号。解码时，这相当于12位分辨率。三个共用路标脉冲宽度通过单引脚(NMC)进行选择。模拟速度输出信号提供顺时针或逆时针转动旋变轴的速度表示。AD2S90在±5 V ± 5%直流电源下工作，采用ADI公司线性兼容CMOS工艺(LC2MOS)制造。LC2MOS是一种将精密双极性电路与低功耗CMOS逻辑电路相结合的混合技术工艺。
The AD2S90 is a complete 12-bit resolution tracking resolver-to- digital converter. No external components are required to operate the device.The converter accepts 2 V rms ± 10% input signals in the range 3 kHz-20 kHz on the SIN, COS and REF inputs. A Type II servo loop is employed to track the inputs and convert the input SIN and COS information into a digital representation of the input angle. The bandwidth of the converter is set internally at 1 kHz. The maximum tracking rate is 375 rps at 12-bit resolution.Angular position output information is available in two forms, absolute serial binary and incremental A quad B.The absolute serial binary output is 12-bit (1 in 4096). The data output pin is high impedance when Chip Select CS is logic HI. This allows the connection of multiple converters onto a common bus. Absolute angular information in serial pure binary form is accessed by CS followed by the application of an external clock (SCLK) with a maximum rate of 2 MHz.The encoder emulation outputs A, B and NM continuously produce signals equivalent to a 1024 line encoder.When decoded this corresponds to 12-bits resolution. Three common north marker pulse widths are selected via a single pin (NMC).An analog velocity output signal provides a representation of velocity from a rotating resolver shaft traveling in either a clockwise or counterclockwise direction.The AD2S90 operates on a ±5 V dc ± 5% power supplies and is fabricated on Analog Devices' Linear Compatible CMOS process (LC2MOS). LC2MOS is a mixed technology process that combines precision bipolar circuits with low power CMOS logic circuits.
特点
- 完整的单芯片旋变数字转换器
- 增量式编码器仿真(1024线)
- 绝对串行数据（12位）
- 差分输入
- 12位分辨率
- 工业温度范围
- 20引脚PLCC封装
- 低功耗：50 mW
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技术指标
- Vel Lnrty (+/- FSR max): n/a
- Interface: Serial
- Encoder Emulation: Yes
- Power (mW): 50mW
- Package: 20PLCC
- Resolution (Bits): 12bit
- Max Track Rate (+/- rps): 500
- Accuracy (arcmin): 10.6
- Ref Freq (Hz): 3k-20k
- Vel o/p: Yes
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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 |
| AD2S90AP 产品状态: 量产 |
20 ld PLCC |
20 |
工业 |
Tube, 49 |
$ 37.42 |
$ 32.09 |
| AD2S90APZ 产品状态: 量产 |
20 ld PLCC |
20 |
工业 |
Tube, 49 |
$ 34.08 |
$ 29.22 |
