参数资料
| 型号： | EL8172FSZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC AMP INSTRU SGL R-R I/O 8-SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.55 V/µs |
| -3db带宽： | 170kHz |
| 电流 - 输入偏压： | 10pA |
| 电压 - 输入偏移： | 70µV |
| 电流 - 电源： | 65µA |
| 电流 - 输出 / 通道： | 32mA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°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-SOIC |
| 包装： | 带卷 (TR) |
10
FN6293.5
July 27, 2009
Description of Operation and Application
Information
Product Description
The EL8171 and EL8172 are micropower instrumentation
amplifiers (in-amps) which deliver rail-to-rail input amplification
and rail-to-rail output swing on a single 2.4V to 5.5V supply. The
EL8171 and EL8172 also deliver excellent DC and AC
specifications while consuming only 65A typical supply
current. Because EL8171 and EL8172 provide an independent
pair of feedback terminals to set the gain and to adjust the
output level, these in-amps achieve high common-mode
rejection ratio regardless of the tolerance of the gain setting
resistors. The EL8171 is internally compensated for a minimum
closed loop gain of 10 or greater, well suited for moderate to
high gains. For higher gains, the EL8172 is internally
compensated for a minimum gain of 100.
Input Protection
All input and feedback terminals of the EL8171 and EL8172
have internal ESD protection diodes to both positive and
negative supply rails, limiting the input voltage to within one
diode drop beyond the supply rails. The inverting inputs and
FB- inputs have ESD diodes to the V-rail, and the non-inverting
inputs and FB+ terminals have ESD diodes to the V+ rail. The
EL8172 has additional back-to-back diodes across the input
terminals and also across the feedback terminals. If overdriving
the inputs is necessary, the external input current must never
exceed 5mA. On the other hand, the EL8171 has no clamps to
limit the differential voltage on the input terminals allowing
higher differential input voltages at lower gain applications. It is
recommended however, that the input terminals of the EL8171
are not overdriven beyond 1V to avoid offset drift. An external
series resistor may be used as an external protection to limit
excessive external voltage and current from damaging the
inputs.
Input Stage and Input Voltage Range
The input terminals (IN+ and IN-) of the EL8171 and EL8172
are single differential pair P-MOSFET devices aided by an
Input Range Enhancement Circuit (IREC) to increase the
headroom of operation of the common-mode input voltage.
The feedback terminals (FB+ and FB-) also have a similar
topology. As a result, the input common-mode voltage range
of both the EL8171 and EL8172 is rail-to-rail. These in-amps
are able to handle input voltages that are at or slightly
beyond the supply and ground making these in-amps well
suited for single 5V or 3.3V low voltage supply systems.
There is no need to move the common-mode input of the in-
amps to achieve symmetrical input voltage.
Output Stage and Output Voltage Range
A pair of complementary MOSFET devices drive the output
VOUT to within a few mV of the supply rails. At a 100kΩ load,
the PMOS sources current and pulls the output up to 4mV
below the positive supply, while the NMOS sinks current and
pulls the output down to 4mV above the negative supply, or
ground in the case of a single supply operation. The current
sinking and sourcing capability of the EL8171 and EL8172
are internally limited to less than 35mA.
Pin Descriptions
EL8171/EL8172
PIN NAME
EQUIVALENT CIRCUIT
PIN FUNCTION
1
DNC
Do Not Connect; Internal connection - Must be left floating.
2
IN-
Circuit 1A, Circuit 1B
High impedance input terminals. EL8172 input circuit is shown in Circuit 1A, and
the EL8171 input circuit is shown in Circuit 1B. EL8171: to avoid offset drift, it is
recommended that the terminals are not overdriven beyond 1V and the input
current must never exceed 5mA.
3
IN+
Circuit 1A, Circuit 1B
4
V-
Circuit 3
Negative supply terminal.
5
FB-
Circuit 1A, Circuit 1B
High impedance feedback terminals. EL8172 input circuit is shown in Circuit 1A,
and the EL8171 input circuit is shown in Circuit 1B. EL8171: to avoid offset drift, it
is recommended that the terminals are not overdriven beyond 1V and the input
current must never exceed 5mA.
8
FB+
Circuit 1A, Circuit 1B
7
V+
Circuit 3
Positive supply terminal.
6
VOUT
Circuit 2
Output Voltage.
IN-
V+
V-
V+
V-
OUT
CIRCUIT 2
CIRCUIT 1A
V+
V-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 3
V+
V-
CIRCUIT 1B
FB-
IN-
FB-
IN+
FB+
IN+
FB+
EL8171, EL8172
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EL8172FSZ-T7A | 功能描述:仪表放大器 EL8172FSZ MICROPWR SINGL SUPY R2R I/O RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| EL8172IS | 功能描述:IC AMP INSTR SGL R-R I/O 8-SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| EL8172IS-T13 | 功能描述:IC AMP INSTR SGL R-R I/O 8-SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| EL8172IS-T7 | 功能描述:IC AMP INSTR SGL R-R I/O 8-SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| EL8172ISZ | 功能描述:IC AMP INSTR SGL R-R I/O 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 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:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
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