【问】DAC7617转换速度

能满足吧，你看一下他的规格

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

DAC7617是一个四通道，串行输入，１２位，异步复位数模转换芯片，稳定时间１０微妙，误差量０.０１２％，

芯片是个硬件电路处理的，楼主你既然选择这种方式用单片机去产生基准，硬件芯片的速度肯定能跟上你软件处理的速度，所以我觉得肯定可以啦

我也不能确定呢，看了一台样机是用DSP产生的基准，用DAC芯片再去设计的啦