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參數資料
| 型號： | AD8205YR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | +3.3V, 2.5Gbps/2.7Gbps, SDH/SONET 4:1 Serializer with Clock Synthesis |
| 中文描述： | OP-AMP, 4500 uV OFFSET-MAX, PDSO8 |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數： | 9/12頁 |
| 文件大小： | 308K |
| 代理商： | AD8205YR |
AD8205
OUTPUT OFFSET ADJUSTMENT
The output of the AD8205 can be adjusted for unidirectional or
bidirectional operation.
Rev. 0 | Page 9 of 12
UNIDIRECTIONAL OPERATION
Unidirectional operation allows the AD8205 to measure cur-
rents through a resistive shunt in one direction. The basic
modes for unidirectional operation are ground referenced
output mode and V+ referenced output mode.
In the case of unidirectional operation, the output could be set
at the negative rail (near ground) or at the positive rail (near
V+) when the differential input is 0 V. The output moves to the
opposite rail when a correct polarity differential input voltage is
applied. In this case, full scale is approximately 100 mV. The
required polarity of the differential input depends on the output
voltage setting. If the output is set at the positive rail, the input
polarity needs to be negative to move the output down. If the
output is set at ground, the polarity is positive to move the
output up.
GROUND REFERENCED OUTPUT
When using the AD8205 in this mode, both reference inputs are
tied to ground, which causes the output to sit at the negative rail
when there are zero differential volts at the input (see Figure 14).
0
AD8205
+IN
–IN
NC
NC = NO CONNECT
GND
V+
OUT
V
REF
1
V
REF
2
Figure 14. Ground Referenced Output
Table 4. V+ = 5 V
V
IN
(Referred to IN)
0 V
100 mV
V
O
0.05 V
4.8 V
V+ REFERENCED OUTPUT
This mode is set when both reference pins are tied to the posi-
tive supply. It is typically used when the diagnostic scheme
requires detection of the amplifier and the wiring before power
is applied to the load (see Figure 15).
0
AD8205
+IN
–IN
NC
NC = NO CONNECT
GND
V+
OUT
V
REF
1
V
REF
2
Figure 15. V+ Referenced Output
Table 5. V+ = 5 V
V
IN
(Referred to IN)
0 V
100 mV
BIDIRECTIONAL OPERATION
Bidirectional operation allows the AD8205 to measure currents
through a resistive shunt in two directions.
V
O
4.8 V
0.05 V
In this case, the output is set anywhere within the output range.
Typically, it is set at half-scale for equal range in both directions.
In some cases, however, it is set at a voltage other than half-scale
when the bidirectional current is nonsymmetrical.
Table 6. V+ = 5 V, V
O
= 2.5 with V
IN
= 0 V
V
IN
(Referred to IN)
+40 mV
40 mV
Adjusting the output is accomplished by applying voltage(s) to
the reference inputs.
V
O
4.5 V
0.5 V
V
REF
1 and V
REF
2 are tied to internal resistors that connect to an
internal offset node. There is no operational difference between
the pins.
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| AD8205YRZ-R7 | 功能描述:IC AMP DIFF 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1,000 系列:- 放大器類型:電壓反饋 電路數:4 輸出類型:滿擺幅 轉換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:帶卷 (TR) |
| AD8205YRZ-RL | 功能描述:IC AMP DIFF 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1,000 系列:- 放大器類型:電壓反饋 電路數:4 輸出類型:滿擺幅 轉換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:帶卷 (TR) |
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