参数资料
| 型号： | AD8279BRZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF 1MHZ DUAL LP 14SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 差分 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 1.4 V/µs |
| 增益带宽积： | 1MHz |
| 电压 - 输入偏移： | 50µV |
| 电流 - 电源： | 300µA |
| 电流 - 输出 / 通道： | 15mA |
| 电压 - 电源，单路/双路(±)： | 2 V ~ 36 V，±2 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 带卷 (TR) |
AD8278/AD8279
Rev. C | Page 19 of 24
The reference must be driven with a low impedance source to
maintain the internal resistor ratio. An example using the low
power, low noise OP1177 as a reference is shown in Figure 58.
INCORRECT
V
CORRECT
AD8278
OP1177
+
–
V
REF
AD8278
REF
0
83
08
-05
4
Figure 58. Driving the Reference Pin
DIFFERENTIAL OUTPUT
The two difference amplifiers of the AD8279 can be configured
to provide a differential output, as shown in Figure 59. This
differential output configuration is suitable for various applications,
such as strain gage excitation and single-ended-to-differential
conversion. The differential output voltage has a gain twice that
of a single AD8279 channel, as shown in the following equation:
VDIFF_OUT
= V+OUT VOUT = 2 × GAD8279 × (VIN+ – VIN)
If the AD8279 amplifiers are each configured for G = , the
differential gain is 1×; if the AD8279 amplifiers are each
configured for G = 2, the differential gain is 4×.
08
30
8-
0
61
12
2
14
3
13
11
20k
40k
20k
+VS
–IN
+IN
+OUT
40k
AD8279
10
6
8
5
9
4
20k
40k
20k
–VS
40k
–OUT
Figure 59. AD8279 Differential Output G = 4 Configuration
INSTRUMENTATION AMPLIFIER
The AD8278 and AD8279 can be used as building blocks for a
low power, low cost instrumentation amplifier. An instrumentation
amplifier provides high impedance inputs and delivers high
common-mode rejection. Combining the AD8278 with an Analog
Devices, Inc., low power amplifier (see Table 11) creates a precise,
power efficient voltage measurement solution suitable for power
critical systems.
RG
RF
–IN
+IN
A1
A2
AD8278/
AD8279
40k
20k
40k
REF
VOUT
VOUT = (1 + 2RF/RG) (VIN+ – VIN–) × 2
08
30
8-
0
5
6
Figure 60. Low Power Precision Instrumentation Amplifier
Table 11. Low Power Op Amps
Op Amp (A1, A2)
Features
Dual micropower op amp
Precision dual micropower op amp
Low cost CMOS micropower op amp
Dual precision CMOS micropower op amp
It is preferable to use dual op amps for the high impedance inputs
because they have better matched performance and track each
other over temperature. The AD8278 and AD8279 difference
amplifiers cancel out common-mode errors from the input op
amps, if they track each other. The differential gain accuracy of
the in-amp is proportional to how well the input feedback
resistors (RF) match each other. The CMRR of the in-amp
increases as the differential gain is increased (1 + 2RF/RG), but a
higher gain also reduces the common-mode voltage range.
Refer to A Designer’s Guide to Instrumentation Amplifiers for
more design ideas and considerations at www.analog.com,
under Technical Documentation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8279BRZ-RL | 功能描述:IC AMP DIFF 1MHZ DUAL LP 14SOIC 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 |
| AD8279-EVALZ | 功能描述:AD8279 2 - Dual Channels per IC Difference Amplifier Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 每 IC 通道数:2 - 双 放大器类型:差异 输出类型:单端，满摆幅 压摆率:1.4 V/μs -3db 带宽:1MHz 电流 - 输出/通道:15mA 工作温度:-40°C ~ 85°C 电流 - 电源（主 IC）:300μA 电压 - 电源，单/双（±）:2 V ~ 36 V，±2 V ~ 18 V 板类型:完全填充 所含物品:板 使用的 IC/零件:AD8279 标准包装:1 |
| AD827AQ | 功能描述:IC OPAMP GP 50MHZ DUAL LP 8CDIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD827J | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, Low Power Dual Op Amp |
| AD827JCHIPS | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, Low Power Dual Op Amp |
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