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參數(shù)資料
| 型號(hào)： | ADC1205 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | 12-Bit Plus Sign mP Compatible A/D Converters |
| 中文描述： | 12位帶符號(hào)手機(jī)兼容的A / D轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 5/18頁(yè) |
| 文件大?。?/td> | 327K |
| 代理商： | ADC1205 |
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AC Electrical Characteristics
(Continued)
Note 4:
Two on-chip diodes are tied to each analog input as shown below.
TL/H/5676–4
Errors in the A/D conversion can occur if these diodes are forward biased more than 50 mV. This means that if AV
CC
and DV
CC
are minimum (4.75 V
DC
) and V
b
is
minimum (
b
4.75V
DC
), full-scale must be
s
4.8V
DC
.
Note 5:
A diode exists between analog V
CC
and digital V
C
.
TL/H/5676–20
To guarantee accuracy, it is required that the AV
CC
and DV
CC
be connected together to a power supply with separate bypass filters at each V
CC
pin.
Note 6:
A diode exists between analog ground and digital ground.
TL/H/5676–21
To guarantee accuracy, it is required that the analog ground and digital ground be connected together externally.
Note 7:
Accuracy is guaranteed at f
CLK
e
1.0 MHz. At higher clock frequencies accuracy may degrade.
Note 8:
Typicals are at 25
§
C and represent most likely parametric norm.
Note 9:
Tested and guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10:
Guaranteed, but not 100% production tested. These limits are not used to calculate outgoing quality levels.
Note 11:
Linearity error is defined as the deviation of the analog value, expressed in LSBs, from the straight line which passes through positive full scale and zero,
after adjusting zero error. (See Figures 1b and 1c).
Note 12:
Human body model; 100 pF discharged through a 1.5 k
X
resistor.
TL/H/5676–8
FIGURE 1a. Transfer Characteristic
5
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