参数资料
型号: ADCMP603BCPZ-R7
厂商: Analog Devices Inc
文件页数: 4/16页
文件大小: 0K
描述: IC COMP TTL/CMOS 1CHAN 12-LFCSP
标准包装: 1
类型: 带锁销
元件数: 1
输出类型: CMOS,补充型,满摆幅,TTL
电压 - 电源,单路/双路(±): 2.5 V ~ 5.5 V
电压 - 输入偏移(最小值): 5mV @ 2.5V
电流 - 输入偏压(最小值): 5µA @ 2.5V
电流 - 输出(标准): 50mA
电流 - 静态(最大值): 1.8mA
CMRR, PSRR(标准): 50dB CMRR,50dB PSRR
传输延迟(最大): 5ns
磁滞: 100µV
工作温度: -40°C ~ 125°C
封装/外壳: 12-VFQFN 裸露焊盘,CSP
安装类型: 表面贴装
包装: 标准包装
产品目录页面: 765 (CN2011-ZH PDF)
其它名称: ADCMP603BCPZ-R7DKR
ADCMP603
Rev. 0 | Page 12 of 16
05
91
5-
02
6
50
150
250
350
450
550
650
H
YST
ER
E
SI
S
(
m
V
)
HYSTERESIS RESISTOR (k)
1
10
100
1000
VCC = 5.5V
VCC = 2.5V
The ADCMP603 comparator offers a programmable hysteresis
feature that can significantly improve accuracy and stability.
Connecting an external pull-down resistor or a current source
from the LE/HYS pin to GND varies the amount of hysteresis in
a predictable, stable manner. Leaving the LE/HYS pin
disconnected or driving it high removes the hysteresis. The
maximum hysteresis that can be applied using this pin is
approximately 160 mV. Figure 18 illustrates the amount of
hysteresis applied as a function of the external resistor value,
and Figure 9 illustrates hysteresis as a function of the current.
The hysteresis control pin appears as a 1.25 V bias voltage seen
through a series resistance of 7 kΩ ± 20% throughout the hysteresis
control range. The advantages of applying hysteresis in this manner
are improved accuracy, improved stability, reduced component
count, and maximum versatility. An external bypass capacitor is
not recommended on the HYS pin because it impairs the latch
function and often degrades the jitter performance of the device.
As described in the Using/Disabling the Latch Feature section,
hysteresis control need not compromise the latch function.
Figure 18. Hysteresis vs. R
Control Resistor
HYS
MINIMUM INPUT SLEW RATE REQUIREMENT
With the rated load capacitance and normal good PC Board
design practice, as discussed in the Optimizing Performance
section, these comparators should be stable at any input slew
rate with no hysteresis. Broadband noise from the input stage is
observed in place of the violent chattering seen with most other
high speed comparators. With additional capacitive loading or
poor bypassing, more persistent oscillations are seen. This
oscillation is due to the high gain bandwidth of the comparator
in combination with feedback parasitics in the package and PC
board. In many applications, chattering is not harmful since the
first cycle of the oscillation occurs close to V
CROSSOVER BIAS POINT
In both op amps and comparators, rail-to-rail inputs of this type
have a dual front-end design. Certain devices are active near the
VCC rail and others are active near the VEE rail. At some predeter-
mined point in the common-mode range, a crossover occurs. At
this point, typically VCC/2, the direction of the bias current reverses
and the measured offset voltages and currents change.
OS
.
The ADCMP603 slightly elaborates on this scheme. Crossover
points can be found at approximately 0.8 V and 1.6 V.
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