参数资料
| 型号： | LT1724IS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 6/18页 |
| 文件大小： | 0K |
| 描述： | IC PREC OPAMP 200MHZ QUAD 14SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 电压反馈 |
| 电路数： | 4 |
| 转换速率： | 70 V/µs |
| 增益带宽积： | 200MHz |
| 电流 - 输入偏压： | 40nA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 3.7mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | 5 V ~ 10 V，±2.5 V ~ 5 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-SO |
| 包装： | 带卷 (TR) |
| 其它名称： | LT1724ISTR |
LT1722/LT1723/LT1724
14
172234fb
SIMPLIFIED SCHEMATIC
APPLICATIONS INFORMATION
Power dissipation is composed of two parts. The rst is
due to the quiescent supply current and the second is due
to on-chip dissipation caused by the load current.
Worst-case instantaneous power dissipation for a given
resistive load in one amplier occurs at the maximum
supply current and when the output voltage is at half of
either supply voltage (or the maximum swing if less than
half supply voltage).
Therefore PD(MAX) in one amplier is:
PD(MAX) = (V+ – V–)(IS(MAX)) + (V+/2)2/RL
or
PD(MAX) = (V+ – V–)(IS(MAX)) +
(V+ – VO(MAX))(VO(MAX)/RL)
Example. Worst-case conditions are: both op amps in
the LT1723IS8 are at TA = 85°C, VS = ±5V, RL = 150Ω,
VOUT = 2.5V.
PD(MAX) = 2 [(10V)(5.95mA) + (2.5V)2/150Ω] = 203mW
TJ(MAX) = 85°C + (203mW)(190°C/W) = 124°C
which is less than the absolute maximum rating at 150°C.
Circuit Operation
The LT1722/LT1723/LT1724 circuit topology is a voltage
feedback amplier. The operation of the circuit can be
understood by referring to the Simplied Schematic. The
rst stage is a folded cascode formed by the transistors
Q1 through Q4. A degeneration resistor, R, is used in the
input stage. The current mirror Q5, Q6 is bootstrapped
by Q7. The capacitor, C, assures the bandwidth and the
slew rate performance. The output stage is formed by
complementary emitter followers, Q8 through Q11. The
diodes D1 and D2 protect against input reversed biasing.
The remaining part of the circuit assures optimum voltage
and current biases for all stages.
Low noise, reduced current supply, high speed and
DC accurate parameters are distinctive features of the
LT1722/LT1723/LT1724.
Q2
+IN
Q1
D1
D2
R
?–IN
R2
Q6
Q7
Q9
Q10
VS
+
VS
–
OUT
1723 SS
Q11
Q8
Q4
C
VBIAS
I3
I4
I5
I2
I1
R1
Q5
Q3
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相关代理商/技术参数 |
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| LT1725 | 制造商:LINER 制造商全称:Linear Technology 功能描述:General Purpose Isolated Flyback Controller |
| LT1725CGN | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1725CGN#PBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LT1725CGN#PBF | 制造商:Linear Technology 功能描述:ICSMPS CONTROLLERCURRENT-MOD 制造商:Linear Technology 功能描述:IC,SMPS CONTROLLER,CURRENT-MODE,SSOP,16P |
| LT1725CGN#TR | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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