参数资料
| 型号： | AD8275BRMZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF R-R LDRIFT 8MSOP |
| 产品培训模块： | Power Line Monitoring |
| 标准包装： | 1 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 25 V/µs |
| -3db带宽： | 15MHz |
| 电压 - 输入偏移： | 150µV |
| 电流 - 电源： | 1.9mA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 3.3 V ~ 15 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 766 (CN2011-ZH PDF) |
| 其它名称： | AD8275BRMZ-R7DKR |
AD8275
Rev. A | Page 11 of 16
THEORY OF OPERATION
The AD8275 level translates ±10 V signals at its inputs to 4 V
at its output. It does this by attenuating the input signal by 5.
A subtractor network performs the attenuation, the level shifting,
and the differential-to-single-ended conversion. One benefit of
the subtractor topology is that it can accept input signals
beyond its supply voltage. The subtractor is composed of tightly
matched resistors. By integrating the resistors and trimming the
resistor ratios, the AD8275 achieves 80 dB CMRR and 0.024%
gain error.
07546-
030
INPUT
ESD
REF2
+VS
–VS
+VS
–VS
+VS
–VS
OUT
SENSE
50k
7k
7k
50k
20k
20k
10k
2.5V
–IN
+IN
INPUT
ESD
+VS
–VS
REF1
+VS
–VS
Figure 31. AD8275 Simplified Schematic
To achieve a wider input voltage range, the AD8275 uses an
internal 2.5 V voltage bias tied to –VS and two 7 kΩ resistors, as
shown in Figure 31. The resistors help to set the common mode
of the internal amplifier. The benefit of this circuit is that it
extends the input range without causing crossover distortion
typical of amplifiers that have rail-to-rail complementary
transistor inputs. The input range of the internal op amp is
+VS 0.9 V to VS + 1.35 V.
–10
–8
–6
600
400
200
0
–200
–400
–600
–4
–2
0
2
4
6
8
10
COMMON-MODE VOLTAGE (V)
O
F
SET
(
V)
07546-
132
Figure 32. AD8275 Does Not Have Crossover Distortion Typical of Rail-to-Rail
Input Amplifiers
The AD8275 employs a balanced, high gain, linear output stage
that adaptively generates current as required, eliminating the
dynamic errors found in other amplifiers. This is useful when
driving SAR ADCs, which can deliver kickback current into the
output of the amplifier. The result is a design that achieves low
distortion, consistent bandwidth, and high slew rate.
BASIC CONNECTION
The basic configurations for the AD8275 are shown in
Figure 33 and Figure 34. In Figure 33, REF1 and REF2 are
tied together. A voltage, VREF, applied to the tied REF1 and
REF2 pins, sets the output voltage level to VREF. For example,
the output remains at 2 V.
07546-
031
AD8275
7
4
5
6
8
1
2
50k
0.1F
50k
20k
20k
10k
3
VINN
+IN
–IN
VINP
REF2
VREF
VOUT
REF1
–VS
+VS
+5V
OUT
SENSE
VOUT =
+ VREF
(VINP) – (VINN)
5
Figure 33. Basic Configuration 1: Shared Reference
In contrast, Figure 34 shows REF1 tied to ground and REF2
tied to VREF. In this example, the two 20 kΩ resistors serve as a
resistor divider, and VREF is divided by 2. For example, if both
inputs of the AD8275 are grounded and VREF = 5 V, the output
is 2.5 V.
07546-
032
AD8275
7
4
5
6
8
1
2
50k
0.1F
50k
20k
20k
10k
3
VINN
+IN
–IN
VINP
REF2
VREF
VOUT
REF1
–VS
+VS
+5V
OUT
SENSE
VOUT =
+
(VINP) – (VINN)
5
VREF + 0V
2
Figure 34. Basic Configuration 2: Split Reference
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8275BRMZ-RL | 功能描述:IC AMP DIFF R-R LDRIFT 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:3 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:70µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:Digi-Reel® 其它名称:MAX4475AUT#TG16DKR |
| AD8276 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Power, Wide Supply Range, Low Cost Unity-Gain Difference Amplifiers |
| AD8276ARMZ | 功能描述:IC AMP DIFF R-R 550KHZ LP 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8276ARMZ | 制造商:Analog Devices 功能描述:IC DIFF AMP 550KHZ 1.1V/ MSOP-8 |
| AD8276ARMZ-R7 | 功能描述:IC AMP DIFF R-R 550KHZ LP 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:管件 |
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