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参数资料
| 型号： | ISL28278 |
| 厂商： | Intersil Corporation |
| 英文描述： | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Op-Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)运放) |
| 中文描述： | 双核和四微功耗单电源轨到轨输入和输出（RRIO）运算放大器（双/四通道，微功率，单电源，轨对轨输入/输出（RRIO）运放） |
| 文件页数： | 10/13页 |
| 文件大小： | 496K |
| 代理商： | ISL28278 |
10
FN6145.2
July 11, 2007
Applications Information
Introduction
The ISL28278 and ISL28478 are dual and quad CMOS
rail-to-rail input, output (RRIO) micropower operational
amplifiers. These devices are designed to operate from a
single supply (2.4V to 5.0V) or dual supplies (±1.2V to
±2.5V) while drawing only 120
μ
A (ISL28278) of supply
current. This combination of low power and precision
performance makes these devices suitable for solar and
battery power applications.
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 ISL28278 achieves input rail-to-rail 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 versus the common-mode
voltage range gives us an undistorted behavior from typically
100mV below the negative rail and 10% higher than the V
+
rail (0.5V higher than V
+
when V
+
equals 5V).
Input Protection
All input terminals have internal ESD protection diodes to the
positive and negative supply rails, limiting the input voltage to
within one diode beyond the supply rails. There is an
additional pair of back-to-back diodes across the input
terminals. For applications where the input differential voltage
is expected to exceed 0.5V, external series resistors must be
used to ensure the input currents never exceed 5mA.
Pin Descriptions
ISL28278
(16 LD QSOP)
ISL28478
(16 LD QSOP)
PIN NAME
EQUIVALENT
CIRCUIT
DESCRIPTION
3
1
OUT_A
Circuit 3
Amplifier A output
4
2
IN-_A
Circuit 1
Amplifier A inverting input
5
3
IN+_A
Circuit 1
Amplifier A non-inverting input
15
4
V+
Circuit 4
Positive power supply
12
5
IN+_B
Circuit 1
Amplifier B non-inverting input
13
6
IN-_B
Circuit 1
Amplifier B inverting input
14
7
OUT_B
Circuit 3
Amplifier B output
1, 2, 8, 9, 10, 16
8, 9
NC
No internal connection
10
OUT_C
Circuit 3
Amplifier C output
11
IN-_C
Circuit 1
Amplifier C inverting input
12
IN+_C
Circuit 1
Amplifier B non-inverting input
7
13
V-
Circuit 4
Negative power supply
14
IN+_D
Circuit 1
Amplifier D non-inverting input
15
IN-_D
Circuit 1
Amplifier D inverting input
16
OUT_D
Circuit 3
Amplifier D output
6
EN_A
Circuit 2
Amplifier A enable pin internal pull-down; Logic “1” selects the disabled state;
Logic “0” selects the enabled state.
11
EN_B
Circuit 2
Amplifier B enable pin with internal pull-down; Logic “1” selects the disabled
state; Logic “0” selects the enabled state.
IN-
V
+
V
-
LOGIC
PIN
V
+
V
-
V
+
V
-
OUT
CIRCUIT 3
CIRCUIT 1
CIRCUIT 2
IN+
V
+
V
-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 4
ISL28278, ISL28478
相关PDF资料 |
PDF描述 |
|---|---|
| ISL28478 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Op-Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)运放) |
| ISL28286 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Precision Op Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)精密运放) |
| ISL28486 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Precision Op Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)精密运放) |
| ISL28288 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Op-Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)运放) |
| ISL28488 | Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Op-Amp(双/四通道，微功率，单电源，轨对轨输入/输出(RRIO)运放) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL28278_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual and Quad Micropower Single Supply Rail-to-Rail Input and Output (RRIO) Op-Amp |
| ISL28278EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL28278 RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| ISL28278FAZ | 功能描述:IC OPAMP DUAL RRIO PREC 16-QSOP 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 |
| ISL28278FAZ-T7 | 功能描述:IC OPAMP DUAL RRIO PREC 16-QSOP 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 |
| ISL28278FAZ-TZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
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