参数资料
| 型号： | ICL7621DCBAZ-T |
| 厂商： | Intersil |
| 文件页数： | 4/9页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP DUAL 0.5MHZ CMOS 8-SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 转换速率： | 0.16 V/µs |
| 增益带宽积： | 480kHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 15000µV |
| 电流 - 电源： | 100µA |
| 电流 - 输出 / 通道： | 1mA |
| 电压 - 电源，单路/双路(±)： | 2 V ~ 16 V，±1 V ~ 8 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-SOIC |
| 包装： | 带卷 (TR) |
4
FN3403.5
March 4, 2010
Application Information
Static Protection
All devices are static protected by the use of input diodes.
However, strong static fields should be avoided, as it is
possible for the strong fields to cause degraded diode
junction characteristics, which may result in increased input
leakage currents.
Latchup Avoidance
Junction-isolated CMOS circuits employ configurations
which produce a parasitic 4-layer (PNPN) structure. The
4-layer structure has characteristics similar to an SCR, and
under certain circumstances may be triggered into a low
impedance state resulting in excessive supply current. To
avoid this condition, no voltage greater than 0.3V beyond the
supply rails may be applied to any pin. In general, the op
amp supplies must be established simultaneously with, or
before any input signals are applied. If this is not possible,
the drive circuits must limit input current flow to 2mA to
prevent latchup.
Choosing the Proper IQ
Each device in the ICL76XX family has a similar IQ setup
scheme, which allows the amplifier to be set to nominal
quiescent currents of 10A, 100A or 1mA. These current
settings change only very slightly over the entire supply voltage
range. The ICL7611/12 have an external IQ control terminal,
permitting user selection of each amplifiers’ quiescent current.
The ICL7621 has a fixed IQ setting of 100A.
Output Stage and Load Driving Considerations
Each amplifiers’ quiescent current flows primarily in the
output stage. This is approximately 70% of the IQ settings.
This allows output swings to almost the supply rails for
output loads of 1M
Ω, 100kΩ, and 10kΩ, using the output
stage in a highly linear class A mode. In this mode,
crossover distortion is avoided and the voltage gain is
maximized. However, the output stage can also be operated
in Class AB for higher output currents (see graphs in “Typical
Performance Curves” beginning on page 6). During the
transition from Class A to Class B operation, the output
transfer characteristic is nonlinear and the voltage gain
decreases.
Frequency Compensation
The ICL76XX are internally compensated, and are stable
for closed loop gains as low as unity with capacitive loads
up to 100pF.
Typical Applications
The user is cautioned that, due to extremely high input
impedances, care must be exercised in layout, construction,
board cleanliness, and supply filtering to avoid hum and
noise pickup.
FIGURE 1. SIMPLE FOLLOWER
ICL76XX
+
-
VIN
VOUT
RL ≥ 10kΩ
FIGURE 2. LEVEL DETECTOR
ICL76XX
+
-
VIN
VOUT
100k
Ω
+5
1M
Ω
TO CMOS OR
LPTTL LOGIC
FIGURE 3.
VOUT
1F
ICL76XX
+
-
+
λ
NOTE: Low leakage currents allow integration times up to
several hours.
PHOTOCURRENT INTEGRATOR
FIGURE 4.
1M
Ω
+
-
1M
Ω
DUTY CYCLE
V-
V+
680k
Ω
1M
Ω
WAVEFORM GENERATOR
+
-
1/2
ICL7621
1/2
ICL7621
NOTE: Since the output range swings exactly from rail to rail,
frequency and duty cycle are virtually independent of power supply
variations.
TRIANGLE/SQUARE WAVE GENERATOR
ICL7621
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL7621DCJD | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single/Dual/Triple/Quad Operational Amplifiers |
| ICL7621DCJE | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single/Dual/Triple/Quad Operational Amplifiers |
| ICL7621DCPA | 功能描述:运算放大器 - 运放 Dual CMOS Low Power RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| ICL7621DCPA+ | 功能描述:运算放大器 - 运放 Dual CMOS Low Power RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| ICL7621DCPA-2 | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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