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WM2625CD 参数 Datasheet PDF下载

WM2625CD图片预览
型号: WM2625CD
PDF下载: 下载PDF文件 查看货源
内容描述: 低功耗双8位串行输入DAC [Low Power Dual 8-bit Serial Input DAC]
分类和应用:
文件页数/大小: 9 页 / 103 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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WM2625  
Production Data  
Notes:  
1. Integral non-linearity (INL) is the maximum deviation of the output from the line between zero and full scale (excluding the  
effects of zero code and full scale errors).  
2. Differential non-linearity (DNL) is the difference between the measured and ideal 1LSB amplitude change of any adjacent two  
codes. A guarantee of monotonicity means the output voltage always changes in the same direction (or remains constant) as  
the digital input code.  
3. Zero code error is the voltage output when the DAC input code is zero.  
4. Gain error is the deviation from the ideal full-scale output excluding the effects of zero code error.  
5. Power supply rejection ratio is measured by varying VDD from 4.5V to 5.5V and measuring the proportion of this signal  
imposed on the zero code error and the gain error.  
6. Zero code error and Gain error temperature coefficients are normalised to full-scale voltage.  
7. Output load regulation is the difference between the output voltage at full scale with a 10kload and 2kload. It is  
expressed as a percentage of the full scale output voltage with a 10kload.  
8. IDD is measured while continuously writing code 128 to the DAC. For VIH < VDD - 0.7V and VIL > 0.7V supply current will  
increase.  
9. Slew rate results are for the lower value of the rising and falling edge slew rates  
10. Settling time is the time taken for the signal to settle to within 0.5LSB of the final measured value for both rising and falling  
edges. Limits are ensured by design and characterisation, but are not production tested.  
11. SNR, SNRD, THD and SPFDR are measured on a synthesised sine wave at frequency fOUT generated with a sampling  
frequency fs.  
SERIAL INTERFACE  
tWL  
tWH  
3
tSUC16CS  
1
2
4
5
15  
16  
SCLK  
DIN  
tSUD  
tHD  
D15  
tSUCSCK  
D14  
D13  
D12  
D1  
D0  
NCS  
Figure 1 Timing Diagram  
Test Conditions:  
RL = 10k, CL = 100pF. VDD = 5V ± 10%, VREF = 2.048V and VDD = 3V ± 10%, VREF = 1.024V over recommended operating  
free-air temperature range (unless noted otherwise).  
SYMBOL  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
Setup time, NCS low before first falling SCLK edge  
tSUCSCK  
10  
ns  
Setup time, 16th falling SCLK edge (when data bit D0  
is sampled) before NCS rising edge.  
tSUC16CS  
10  
ns  
Pulse duration, SCLK high.  
tWH  
tWL  
tSUD  
tHD  
25  
25  
10  
10  
ns  
ns  
ns  
ns  
Pulse duration, SCLK low.  
Setup time, data ready before SCLK falling edge.  
Hold time, data held valid after SCLK falling edge.  
WOLFSON MICROELECTRONICS LTD  
PD Rev 1.0 April 2001  
4