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參數資料
| 型號： | AD8557ARZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CHOPPER 2MHZ 55MA 8SOIC |
| 標準包裝： | 2,500 |
| 系列： | DigiTrim® |
| 放大器類型： | 斷路器（零漂移） |
| 電路數： | 1 |
| 增益帶寬積： | 2MHz |
| 電流 - 輸入偏壓： | 18nA |
| 電壓 - 輸入偏移： | 2µV |
| 電流 - 電源： | 1.8mA |
| 電流 - 輸出 / 通道： | 55mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
AD8557
Rev. C | Page 20 of 24
Determining Optimal Gain and Offset Codes
First, determine the desired gain:
1. Determine the desired gain, GA (using the measurements
obtained from the simulation).
that (2.8 × 1.05) < (GA/G2) < (5.2/1.05). This ensures the
first and last codes for the first stage gain are not used,
thereby allowing enough first stage gain codes within each
second stage gain range to adjust for the 3% accuracy.
Next, set the second stage gain:
1. Use the simulation mode to set the second stage gain to G2.
2. Set the output offset to allow the AD8557 gain to be
measured, for example, use Code 128 to set it to midsupply.
3. Use Table 6 or Equation 1 to set the first stage gain code
CG1, so the first stage gain is nominally GA/G2.
4. Measure the resulting gain (GB). GB should be within
3% of GA.
5. Calculate the first stage gain error (in relative terms)
EG1 = GB/GA 1.
6. Calculate the error (in the number of the first stage gain
codes) CEG1 = EG1/0.00489.
7. Set the first stage gain code to CG1 CEG1.
8. Measure the gain (GC). GC should be closer to GA than to GB.
9. Calculate the error (in relative terms) EG2 = GC/GA 1.
10. Calculate the error (in the number of the first stage gain
codes) CEG2 = EG2/0.00489.
11. Set the first stage gain code to CG1 CEG1 CEG2. The
resulting gain should be within one code of GA.
Finally, determine the desired output offset:
1. Determine the desired output offset OA (using the
measurements obtained from the simulation).
2. Use Equation 2 to set the output offset code CO1 such that
the output offset is nominally OA.
3. Measure the output offset (OB). OB should be within
3% of OA.
4. Calculate the error (in relative terms) EO1 = OB/OA 1.
5. Calculate the error (in the number of the output offset
codes) CEO1 = EO1/0.00392.
6. Set the output offset code to CO1 CEO1.
7. Measure the output offset (OC). OC should be closer to OA
than to OB.
8. Calculate the error (in relative terms) EO2 = OC/OA 1.
9. Calculate the error (in the number of the output offset
codes) CEO2 = EO2/0.00392.
10. Set the output offset code to CO1 CEO1 CEO2. The
resulting offset should be within one code of OA.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8557ARZ-REEL7 | 功能描述:IC AMP CHOPPER 2MHZ 55MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
| AD8558WACPZ-R2 | 功能描述:IC OPAMP CHOPPER 2MHZ 16LFCSP 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
| AD8558WACPZ-REEL | 功能描述:IC OPAMP CHOPPER 2MHZ 16LFCSP 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
| AD8558WACPZ-REEL7 | 功能描述:IC OPAMP CHOPPER 2MHZ 16LFCSP 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
| AD8560 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16 V Rail-to-Rail Buffer Amplifier |
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