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| 型号： | ISL28276EVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR ISL28276 |
| 标准包装： | 1 |
| 每 IC 通道数： | 2 - 双 |
| 放大器类型： | 通用 |
| 输出类型： | 单端，满摆幅 |
| 转换速率： | 0.17 V/µs |
| 电流 - 输出 / 通道： | 31mA |
| 工作温度： | -40°C ~ 125°C |
| 电流供应（主 IC）： | 120µA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 5.5 V，±1.2 V ~ 2.75 V |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL28276 |
16
FN6301.4
June 23, 2009
Applications Information
Introduction
The ISL28176, ISL28276 and ISL28476 are single, dual and
quad BiCMOS rail-to-rail input, output (RRIO) micropower
precision 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 120A
(ISL28276) 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 devices achieve rail-to-rail input 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
down to the negative rail to 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. Both parts have
additional back-to-back diodes across the input terminals. If
overdriving the inputs is necessary, the external input current
must never exceed 5mA. External series resistors may be
used as an external protection to limit excessive external
voltage and current from damaging the inputs.
Input Bias Current Compensation
The devices contain an input bias cancellation circuit which
reduces the bias currents down to a typical of 500pA while
maintaining an excellent bandwidth for a micro-power
operational amplifier. The input stage transistors are still
biased with adequate current for speed but the canceling
circuit sinks most of the base current, leaving a small fraction
as input bias current.
Rail-to-Rail Output
A pair of complementary MOSFET 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. Both parts, with a 100k
Ω load, will typically swing to
within 4mV of the positive supply rail and within 3mV of the
negative supply rail.
4
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
6EN_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.
Pin Descriptions (Continued)
ISL28176
(8 LD SOIC)
ISL28276
(8 LD SOIC)
ISL28276
(16 LD QSOP)
ISL28476
(16 LD QSOP)
PIN
NAME
EQUIVALENT
CIRCUIT
DESCRIPTION
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
ISL28176, ISL28276, ISL28476
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相关代理商/技术参数 |
参数描述 |
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| ISL28276FBZ | 功能描述:精密放大器 ISL28276FBZ DL 55UA RRIO PRCSN BIPOLAR RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| ISL28276FBZ-T7 | 功能描述:IC OPAMP DUAL RRIO PREC 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:2 V/µs 增益带宽积:5MHz -3db带宽:- 电流 - 输入偏压:100nA 电压 - 输入偏移:1500µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:100mA 电压 - 电源，单路/双路(±):4 V ~ 36 V，±2 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:14-DIP（0.300"，7.62mm） 供应商设备封装:14-PDIP 包装:管件 产品目录页面:1130 (CN2011-ZH PDF) 其它名称:MC33179PGOS |
| ISL28276IAZ | 功能描述:IC OPAMP DUAL RRIO MCPWR 16-QSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:75 系列:MicroAmplifier™ 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.03 V/µs 增益带宽积:100kHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:60µV 电流 - 电源:20µA 电流 - 输出 / 通道:5mA 电压 - 电源，单路/双路(±):2.3 V ~ 5.5 V 工作温度:-40°C ~ 85°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:管件 |
| ISL28276IAZ-T | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual Precision Micropower Single Supply Rail-to-Rail Input and Output Precision Op-Amps |
| ISL28276IAZ-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:- 标准包装:75 系列:MicroAmplifier™ 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.03 V/µs 增益带宽积:100kHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:60µV 电流 - 电源:20µA 电流 - 输出 / 通道:5mA 电压 - 电源，单路/双路(±):2.3 V ~ 5.5 V 工作温度:-40°C ~ 85°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:管件 |
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