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參數(shù)資料
| 型號： | AD9480BSUZ-2501 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | 8-Bit, 250 MSPS 3.3 V A/D Converter |
| 中文描述： | 8位，250MSPS的3V A/D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/28頁 |
| 文件大小： | 1146K |
| 代理商： | AD9480BSUZ-2501 |
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AD9480
The AD9480 can be easily configured for different full-scale
ranges. See the Voltage Reference section for more information.
Optimal performance is achieved with a 1 V p-p analog input.
Rev. 0 | Page 13 of 28
0
SENSE = GND
VIN+
2.0V
500mV
2.0V
VIN–
DIGITALOUT = ALL 1s
DIGITALOUT = ALL 0s
Figure 13. Analog Input Full Scale
VOLTAGE REFERENCE
A stable and accurate 1.0 V reference is built into the AD9480.
Users can choose this internal reference or provide an external
reference for greater accuracy and flexibility. Figure 15 shows
the typical reference variation with temperature. Table 9
summarizes the available reference configurations.
SELECT
LOGIC
ADC
CORE
0.5V
7k
VREF
0.1
μ
F
10
μ
F+
SENSE
VIN+
VIN–
0
7k
Figure 14. Internal Reference Equivalent Circuit
Fixed Reference
The internal reference can be configured for a differential span
of 1 V p-p (see Figure 17). It is recommended to place a 0.1uF
capacitor as close as possible to the VREF pin; a 10 uF capacitor
is also required (see the PCB layout for guidance). If the internal
reference of the AD9480 is used to drive multiple converters to
improve gain matching, the loading of the reference by the
other converters must be considered. Figure 17 depicts how the
internal reference voltage is affected by loading.
TEMPERATURE (
°
C)
V
1.0085
1.0080
1.0075
1.0060
1.0055
1.0065
1.0070
1.0050
1.0045
1.0040
1.0035
–40
–20
0
20
40
60
80
0
Figure 15. Typical Reference Variation with Temperature
0
0.1
μ
F
10
μ
F
VREF
SENSE
Figure 16. Internal Fixed Reference (1 V p-p)
IREF (mA)
%
0
–0.1
–0.2
–0.4
–0.3
–0.5
0
0.5
1.5
1.0
2.0
2.5
3.0
0
Figure 17. Internal VREF vs. Load Current
Table 9. Reference Configurations
SENSE Voltage
AVDD
0.5 V (Self Biased)
AGND to 0.2 V
Resulting VREF
N/A (external reference input)
0.5 × (1 + R1/R2) V
1.0 V
Reference
External
Programmable
Internal fixed
Differential Span
1 x external reference voltage
1 × VREF (0.75 V p-p to 1.5 V p-p)
1 V p-p
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD9480-LVDS/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For AD9480 制造商:Analog Devices 功能描述:8 BIT 250 MSPS 3V ADC PB FREE EB - Bulk |
| AD9480-LVDS/PCBZ | 制造商:Analog Devices 功能描述:Evaluation Board For AD9480 制造商:Analog Devices 功能描述:EVAL BD FOR AD9480 - Bulk 制造商:Analog Devices 功能描述:EVAL CARD ((NS)) |
| AD9480-LVDSPCB2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed ADC USB FIFO Evaluation Kit |
| AD9480-LVDS-PCB3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:8-Bit, 250 MSPS 3.3 V A/D Converter |
| AD9480XSU-250 | 制造商:Analog Devices 功能描述:8-BIT, 250 MSPS, 3.3 V A/D CONVERTER - Bulk |
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