参数资料
| 型号： | ISL28148FHZ-T7A |
| 厂商： | Intersil |
| 文件页数： | 4/18页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP SGL RRIO 4.5MHZ SOT23-6 |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 1 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 4 V/µs |
| 增益带宽积： | 4.5MHz |
| -3db带宽： | 13MHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 1800µV |
| 电流 - 电源： | 900µA |
| 电流 - 输出 / 通道： | 75mA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 5.5 V，±1.2 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-23-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 1234 (CN2011-ZH PDF) |
| 其它名称： | ISL28148FHZ-T7ADKR |
12
FN6337.4
September 21, 2010
Applications Information
Introduction
The ISL28148, ISL28248 and ISL28448 are single, dual and
quad channel CMOS rail-to-rail input, output (RRIO)
micropower precision operational amplifiers. The parts are
designed to operate from single supply (2.4V to 5.5V) or dual
supply (±1.2V to ±2.75V). The parts have an input common
mode range that extends 0.25V above the positive rail and
100mV below the negative supply rail. The output can swing
within about 3mV of the supply rails with a 100k
Ω load.
Rail-to-Rail Input
Many rail-to-rail input stages use two differential input pairs,
a long-tail PNP (or PFET) and an NPN (or NFET). Severe
penalties have to be paid for this circuit topology. As the
input signal moves from one supply rail to another, the
operational amplifier switches from one input pair to the
other causing drastic changes in input offset voltage and an
undesired change in magnitude and polarity of input offset
current.
The parts achieve input rail-to-rail operation without
sacrificing important precision specifications and degrading
distortion performance. The devices’ input offset voltage
exhibits a smooth behavior throughout the entire
common-mode input range. The input bias current vs the
common-mode voltage range gives us an undistorted
behavior from typically 100mV below the negative rail and
0.25V higher than the V+ rail.
Rail-to-Rail Output
A pair of complementary MOS devices are used to achieve
the rail-to-rail output swing. The NMOS sinks current to swing
the output in the negative direction. The PMOS sources
current to swing the output in the positive direction. The
devices’ with a 100k
Ω load will swing to within 3mV of the
positive supply rail and within 3mV of the negative supply rail.
Results of Overdriving the Output
Caution should be used when overdriving the output for long
periods of time. Overdriving the output can occur in two ways:
1. The input voltage times the gain of the amplifier exceeds the
supply voltage by a large value or
2. The output current required is higher than the output stage
can deliver. These conditions can result in a shift in the Input
Offset Voltage (VOS) as much as 1V/hr. of exposure under
these condition.
IN+ and IN- Input Protection
All input terminals have internal ESD protection diodes to both
positive and negative supply rails, limiting the input voltage to
within one diode beyond the supply rails. They also contain
back-to-back diodes across the input terminals (“Pin
Descriptions” table - Circuit 1 on page 11). For applications
where the input differential voltage is expected to exceed
2
4
11
V-
Negative supply
Circuit 2
1
1 (A)
7 (B)
1 (A)
7 (B)
8 (C)
14 (D)
OUT
OUT_A
OUT_B
OUT_C
OUT_D
Output
Circuit 3
6
8
4
V+
Positive supply
(See circuit 2)
5-
EN
Chip enable
Circuit 4
Pin Descriptions (Continued)
ISL28148
(6 Ld SOT-23)
ISL28248
(8 Ld SO)
(8 Ld MSOP)
ISL28448
(14 Ld TSSOP)
PIN NAME
FUNCTION
EQUIVALENT CIRCUIT
V+
V-
CAPACITIVELY
COUPLED
ESD CLAMP
V+
V-
OUT
V+
V-
EN
ISL28148, ISL28248, ISL28448
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL28148FIZ-T7 | 功能描述:放大器 IC 开发工具 ISL28148FHZFREE SNGL PRCSN R2R I/O RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| ISL28156 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Input Bias Current Op Amps |
| ISL28156_08 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:39レA Micropower Single and Dual Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps |
| ISL28156_0812 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Input Bias Current Op Amps |
| ISL28156EVAL1Z | 功能描述:放大器 IC 开发工具 ISL28156 EVAL BRD 1 RHS CMPL SOT RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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