- 您现在的位置：买卖IC网 > PDF目录6065 > AD8555ACPZ-REEL7 (Analog Devices Inc)IC AMP CHOPPER 2MHZ 10MA 16LFCSP PDF资料下载
参数资料
| 型号： | AD8555ACPZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP CHOPPER 2MHZ 10MA 16LFCSP |
| 标准包装： | 1 |
| 系列： | DigiTrim® |
| 放大器类型： | 断路器（零漂移） |
| 电路数： | 1 |
| 转换速率： | 1.2 V/µs |
| 增益带宽积： | 2MHz |
| 电流 - 输入偏压： | 16nA |
| 电压 - 输入偏移： | 2µV |
| 电流 - 电源： | 2mA |
| 电流 - 输出 / 通道： | 10mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-VQ |
| 包装： | 标准包装 |
| 产品目录页面： | 771 (CN2011-ZH PDF) |
| 其它名称： | AD8555ACPZ-REEL7DKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
AD8555
Rev. A | Page 24 of 28
Suggested Programming Procedure
1.
Set VDD and VSS to the desired values in the application.
Use simulation mode to test and determine the desired
codes for the second stage gain, first stage gain, and output
offset. The nominal values for these parameters are shown
corresponding to these values can be used as a starting
point. However, since actual parameter values for given
codes vary from device to device, some fine tuning is ne-
cessary for the best possible accuracy.
One way to choose these values is to set the output offset
to an approximate value, e.g., Code 128 for midsupply, to
allow the required gain to be determined. Then set the
second stage gain such that the minimum first stage gain
(Code 0) gives a lower gain than required, and the maxi-
mum first stage gain (Code 127) gives a higher gain than
required. After choosing the second stage gain, the first
stage gain can be chosen to fine tune the total gain. Finally,
the output offset can be adjusted to give the desired value.
After determining the desired codes for second stage gain,
first stage gain, and output offset, the device is ready for
permanent programming.
2.
Set VSS to 0 V and VDD to 5.5 V. Use program mode to
permanently enter the desired codes for the second stage
gain, first stage gain, and output offset. Blow the master
fuse to allow the AD8555 to read data from the fuses and
to prevent further programming.
3.
Set VDD and VSS to the desired values in the application.
Use read mode with low sense current followed by high
sense current to verify programmed codes.
4.
Measure gain and offset to verify correct functionality.
Suggested Algorithm to Determine
Optimal Gain and Offset Codes
1.
Determine the desired gain, GA (e.g., using measure-
ments).
2a.
that (4.00 × 1.04) < (GA/G2) < (6.4/1.04). This ensures
that 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.
2b.
Use simulation mode to set the second stage gain to G2.
3a.
Set the output offset to allow the AD8555 gain to be
measured, e.g., use Code 128 to set it to midsupply.
3b.
Use Table 6 or Equation 3 to set the first stage gain code
CG1 such that the first stage gain is nominally GA/G2.
3c.
Measure the resulting gain GB. GB should be within
3% of GA.
3d.
Calculate the first stage gain error (in relative terms)
EG1 = GB/GA 1.
3e.
Calculate the error (in the number of the first stage gain
codes) CEG1 = EG1/0.00370.
3f.
Set the first stage gain code to CG1 CEG1.
3g.
Measure the gain GC. GC should be closer to GA than to GB.
3h.
Calculate the error (in relative terms) EG2 = GC/GA 1.
3i.
Calculate the error (in the number of the first stage gain
codes) CEG2 = EG2/0.00370.
3j.
Set the first stage gain code to CG1 CEG1 CEG2. The
resulting gain should be within one code of GA.
4a.
Determine the desired output offset OA, e.g., using the
measurements.
4b.
Use Equation 1 to set the output offset code CO1 such
that the output offset is nominally OA.
4c.
Measure the output offset OB. OB should be within
3% of OA.
4d.
Calculate the error (in relative terms) EO1 = OB/OA 1.
4e.
Calculate the error (in the number of the output offset
codes) CEO1 = EO1/0.00392.
4f.
Set the output offset code to CO1 CEO1.
4g.
Measure the output offset OC. OC should be closer to OA
than to OB.
4h.
Calculate the error (in relative terms) EO2 = OC/OA 1.
4i.
Calculate the error (in the number of the output offset
codes) CEO2 = EO2/0.00392.
4j.
Set the output offset code to CO1 CEO1 CEO2. The
resulting offset should be within one code of OA.
相关PDF资料 |
PDF描述 |
|---|---|
| TSW-109-08-G-S-RA | CONN HEADER 9POS .100 SGL R/A AU |
| AWH30A-0202-T-R | CONN HEADER 30POS RT ANG GOLD |
| TSW-122-07-T-S | CONN HEADER 22POS .100" SNGL TIN |
| AWH40G-0202-T-R | CONN HEADER 40POS VERT GOLD |
| TSW-122-06-T-S | CONN HEADER 22POS .100" SNGL TIN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8555ACPZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Zero-Drift, Digitally Programmable Sensor Signal Amplifier |
| AD8555AR | 制造商:Analog Devices 功能描述:SP Amp Current Sense Amp Single R-R I/O 5.5V 8-Pin SOIC N Tube 制造商:Analog Devices 功能描述:2.7V to 5.5V 1 2MHz vAv 8SOIC Bulk 制造商:Analog Devices 功能描述:AMP Z-DRIFT PROG GAIN 8555 SOIC8 |
| AD8555AR-EVAL | 制造商:Analog Devices 功能描述:Evaluation Board For Zero-Drift, Digitally Programmable Sensor Signal Amplifier |
| AD8555AR-REEL | 制造商:Analog Devices 功能描述:SP Amp Current Sense Amp Single R-R I/O 5.5V 8-Pin SOIC N T/R |
| AD8555AR-REEL7 | 制造商:Analog Devices 功能描述:SP Amp Current Sense Amp Single R-R I/O 5.5V 8-Pin SOIC N T/R |
发布紧急采购，3分钟左右您将得到回复。