看到了做逆變器的一種方法，改進傳統的純硬件做法，用單片機去生成一個正弦基準，用DAC7617去轉換，不知道這個芯片的轉換速度是否足夠滿足并網需要的基準波形要求。
【問】DAC7617轉換速度
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能滿足吧，你看一下他的規格
DAC7617 特性
- LOW POWER: 3mW
- SETTLING TIME: 10us to 0.012%
- 12-BIT LINEARITY AND MONOTONICITY: \x9640°C to +85°C
- DOUBLE-BUFFERED DATA INPUTS
- SO-16 or SSOP-20 PACKAGES
- SINGLE-SUPPLY +3V OPERATION
- APPLICATIONS
- PROCESS CONTROL
- ATE PIN ELECTRONICS
- CLOSED-LOOP SERVO-CONTROL
- MOTOR CONTROL
- DATA ACQUISITION SYSTEMS
- DAC-PER-PIN PROGRAMMERS
| DAC7614 | DAC7615 | DAC7616 | DAC7617 | |
| Resolution(Bits) | 12 | 12 | 12 | 12 |
| DAC: Channels | 4 | 4 | 4 | 4 |
| Settling Time(μs) | 10 | 10 | 10 | 10 |
| Sample / Update Rate(MSPS) | 0.089 | 0.089 | 0.089 | 0.089 |
| Interface | Serial SPI | Serial SPI | Serial SPI | Serial SPI |
| Output Type | Voltage | Voltage | Voltage | Voltage |
| Output Range Min.(V or mA) | -2.5 | 0 | 0 | 0 |
| Output Range Max.(V or mA) | 2.5 | 1.3 | 1.3 | 4.1 |
| Single/Dual Analog Supply | +/- or + | +/- or + | + | + |
| DNL(Max)(+/-LSB) | 1 | 1 | 1 | 1 |
| INL(Max)(+/-LSB) | 1 | 1 | 1 | 1 |
| INL (+/-)(Max)(%) | 0.024 | 0.024 | 0.024 | 0.024 |
| Monotonicity | 12 | 12 | 12 | 12 |
| SNR(Typ)(dB) | 12 | 12 | ||
| Power Consumption(Typ)(mW) | 15 | 15 | 2.4 | 2.4 |
| Architecture | R-2R | R-2R | R-2R | R-2R |
| Reference: Type | Ext | Ext | Ext | Ext |
| Analog Voltage AV/DD(Min)(V) | 4.75 | 4.75 | 3 | 3 |
| Analog Voltage AV/DD(Max)(V) | 5.75 | 5.25 | 3.6 | 3.6 |
| Logic Voltage DV/DD(Min)(V) | 4.75 | 4.75 | 3 | 3 |
| Logic Voltage DV/DD(Max)(V) | 5.25 | 5.25 | 3.6 | 3.6 |
| No. of Supplies (Unipolar) | 1 | 1 | 1 | 1 |
| No. of Supplies (Bipolar) | 2 | 2 | ||
| Rating | Catalog | Catalog | Catalog | Catalog |
| Pin/Package | 16SOIC, 20SSOP | 16SOIC, 20SSOP | 16SOIC, 20SSOP | 16SOIC, 20SSOP |
| Approx. Price (US$) | 6.70 | 1ku | 6.70 | 1ku | 5.40 | 1ku | 5.40 | 1ku |
| Thermal Shutdown | No | No | No | No |
| Operating Temperature Range(°C) | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
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