参数资料
型号: AS1976-T
厂商: ams
文件页数: 4/18页
文件大小: 0K
描述: IC COMPARATOR PUSH/PULL SOT23-5
标准包装: 1
类型: 通用
元件数: 1
输出类型: CMOS,推挽式,满摆幅
电压 - 电源,单路/双路(±): 1.8 V ~ 5.5 V
电压 - 输入偏移(最小值): 5mV @ 5V
电流 - 输入偏压(最小值): 0.001µA @ 5V
电流 - 输出(标准): 50mA
电流 - 静态(最大值): 500nA
CMRR, PSRR(标准): 74dB CMRR,86.02dB PSRR
传输延迟(最大): 15ns
磁滞: 3mV
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: 标准包装
其它名称: AS1976-TDKR
www.austriamicrosystems.com
Revision 1.01
11 - 17
AS1976/AS1977
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
The AS1976/AS1977 comparators are perfect for use with all 2-cell battery-powered applications. Figure 25 shows a
typical application for the AS1977.
Figure 25. AS1977 Typical Application Circuit
Internal Hysteresis
The comparators were designed with 3mV of internal hysteresis to neutralize the effects of parasitic feedback, i.e., to
prevent unwanted rapid changes between the two output states.
The internal hysteresis in the AS1976/AS1977 creates two trip points:
!
Rising Input Voltage (VTHR) – The comparator switches its output from low to high as VIN rises above this trip point.
!
Falling Input Voltage (VTHF) – The comparator switches its output from high to low as VIN falls below this trip point.
The area between the trip points is the hysteresis band (VHB) (see Figure 26). When the AS1976/AS1977 input volt-
ages are equivalent, the hysteresis effectively causes one input to move quickly past the other, thus taking the input
out of the region where oscillation occurs. In Figure 26 IN- has a fixed voltage applied and IN+ is varied.
Note:
If the inputs are reversed the output will be inverted.
Figure 26. Threshold Hysteresis Band
AS1977
RPULLUP
VIN
4
IN-
1
OUT
5
VCC
2
VEE
3
IN+
OUT
VTHR
VTHF
IN-
Thresholds
Hysteresis
Band
VHB
ams
AG
Technical
content
still
valid
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AS1977 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Ultra-Low Current, 1.8V Comparators
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