参数资料
型号: LTC1843CS8
厂商: Linear Technology
文件页数: 10/12页
文件大小: 0K
描述: IC COMP ULTLOPWR W/REF DUAL8SOIC
标准包装: 100
类型: 带电压基准
元件数: 2
输出类型: 开路漏极
电压 - 电源,单路/双路(±): 2.5 V ~ 11 V,±1.25 V ~ 5.5 V
电压 - 输入偏移(最小值): 10mV @ 5V
电流 - 静态(最大值): 5.7µA
CMRR, PSRR(标准): 80dB CMRR,80dB PSRR
传输延迟(最大): 12µs
磁滞: 50mV
工作温度: 0°C ~ 70°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
安装类型: 表面贴装
包装: 管件
产品目录页面: 1324 (CN2011-ZH PDF)
7
LTC1841/LTC1842/LTC1843
APPLICATIONS INFORMATION
WU
U
The LTC1841/LTC1842/LTC1843 are dual micropower
comparators with a built-in 1.182V reference (LTC1842/
LTC1843). Features include programmable hysteresis,
wide supply voltage range (2V to 11V) and the ability for
the reference to drive up to a 0.01
F capacitor without
oscillation. The comparators’ open-drain outputs can typi-
cally sink greater than 20mA and the supply current
glitches that normally occur when switching logic states
have been eliminated.
Power Supplies
The comparators operate from a single 2V to 11V (2.5V to
11V for LTC1842/LTC1843) or dual
±1V to ±5.5V supply
(
±1.25V to ±5.5V for LTC1842/LTC1843). If the reference
output is required to source more than 1mA or the supply
source impedance is high, V + should be bypassed with a
0.1
F capacitor.
Comparator Inputs
The comparators’ input can swing from the negative
supply V to within 1.3V (max) of the positive supply V +.
The input can be forced 300mV below V or above V +
without damage and the typical input leakage current is
only
±10pA.
Comparator Outputs
Each comparator output is an open-drain pull-down to V
typically capable of sinking greater than 20mA. The low
output leakage current while in three-state mode allows a
high value pull-up resistor to be used. The open-drain
outputs can be wire OR-ed or used in level shifting
applications.
Voltage Reference
The internal bandgap reference has an output voltage of
1.182V referenced to V . The reference accuracy is 1.5%
from – 40
°C to 85°C. It can typically source greater than
1mA and sink up to 10
A with a 5V supply. The reference
can drive a bypass capacitor of up to 0.01
F without
oscillation. By inserting a series resistor, capacitance
values up to 100
F can be used (Figure 1).
Figure 1. Damping the Reference Output
Figure 3 shows the bypassed reference output with a
square wave applied to the V + pin. Resistors R2 and R3 set
a 10mV hysteresis voltage band while R1 damps the
reference response. Note that the comparator output
doesn’t trip.
CAPACITOR VALUE (
F)
0.001
0.1
RESISTOR
VALUE
(k
)
10
0.01
0.1
10
1
1841/43 F02
1
100
Figure 2. Damping Resistance vs Bypass Capacitor Value
LTC1843
V
REF
R1
C1
REFERENCE
OUTPUT
1841/43 F01
Figure 2 shows the resistor value required for different
capacitor values to achieve critical damping. Bypassing
the reference can help prevent false tripping of the com-
parators by preventing glitches on V + or reference load
transients from disturbing the reference output voltage.
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LTC1843CS8#PBF 功能描述:IC COMP ULTLOPWR W/REF DUAL8SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:1 系列:- 类型:通用 元件数:1 输出类型:CMOS,开路集电极,TTL 电压 - 电源,单路/双路(±):2.7 V ~ 5.5 V 电压 - 输入偏移(最小值):7mV @ 5V 电流 - 输入偏压(最小值):0.25µA @ 5V 电流 - 输出(标准):84mA @ 5V 电流 - 静态(最大值):120µA CMRR, PSRR(标准):- 传输延迟(最大):600ns 磁滞:- 工作温度:-40°C ~ 85°C 封装/外壳:SC-74A,SOT-753 安装类型:表面贴装 包装:剪切带 (CT) 产品目录页面:1268 (CN2011-ZH PDF) 其它名称:*LMV331M5*LMV331M5/NOPBLMV331M5CT
LTC1843CS8#TR 功能描述:IC COMPARATOR DUAL ULT LP 8SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS,开路漏极,TTL 电压 - 电源,单路/双路(±):2 V ~ 11 V,±1 V ~ 5.5 V 电压 - 输入偏移(最小值):10mV @ 5V 电流 - 输入偏压(最小值):- 电流 - 输出(标准):0.015mA @ 5V 电流 - 静态(最大值):8.5µA CMRR, PSRR(标准):80dB CMRR,80dB PSRR 传输延迟(最大):12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP(0.300",7.62mm) 安装类型:通孔 包装:管件
LTC1843CS8#TRPBF 功能描述:IC COMP ULTLOPWR W/REF DL 8SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS,开路漏极,TTL 电压 - 电源,单路/双路(±):2 V ~ 11 V,±1 V ~ 5.5 V 电压 - 输入偏移(最小值):10mV @ 5V 电流 - 输入偏压(最小值):- 电流 - 输出(标准):0.015mA @ 5V 电流 - 静态(最大值):8.5µA CMRR, PSRR(标准):80dB CMRR,80dB PSRR 传输延迟(最大):12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP(0.300",7.62mm) 安装类型:通孔 包装:管件
LTC1843IS8 功能描述:IC COMP ULTLOPWR W/REF DUAL8SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:25 系列:- 类型:带电压基准 元件数:4 输出类型:CMOS,开路漏极,TTL 电压 - 电源,单路/双路(±):2 V ~ 11 V,±1 V ~ 5.5 V 电压 - 输入偏移(最小值):10mV @ 5V 电流 - 输入偏压(最小值):- 电流 - 输出(标准):0.015mA @ 5V 电流 - 静态(最大值):8.5µA CMRR, PSRR(标准):80dB CMRR,80dB PSRR 传输延迟(最大):12µs 磁滞:50mV 工作温度:0°C ~ 70°C 封装/外壳:16-DIP(0.300",7.62mm) 安装类型:通孔 包装:管件
LTC1843IS8#PBF 功能描述:IC COMP ULTLOPWR W/REF DL 8SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 比较器 系列:- 标准包装:1 系列:- 类型:通用 元件数:1 输出类型:CMOS,开路集电极,TTL 电压 - 电源,单路/双路(±):2.7 V ~ 5.5 V 电压 - 输入偏移(最小值):7mV @ 5V 电流 - 输入偏压(最小值):0.25µA @ 5V 电流 - 输出(标准):84mA @ 5V 电流 - 静态(最大值):120µA CMRR, PSRR(标准):- 传输延迟(最大):600ns 磁滞:- 工作温度:-40°C ~ 85°C 封装/外壳:SC-74A,SOT-753 安装类型:表面贴装 包装:剪切带 (CT) 产品目录页面:1268 (CN2011-ZH PDF) 其它名称:*LMV331M5*LMV331M5/NOPBLMV331M5CT