參數(shù)資料
型號(hào)： MAX966EUA+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 3/14頁(yè)
文件大?。?/td> 0K
描述： IC COMPARATOR R-R 8-UMAX
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類型： 通用
元件數(shù)： 2
輸出類型： 開(kāi)路漏極，滿擺幅
電壓 - 電源，單路/雙路(±)： 1.6 V ~ 5.5 V
電壓 - 輸入偏移（最小值）： 15mV @ 5.5V
電流 - 輸入偏壓（最小值）： 0.05µA @ 5.5V
電流 - 靜態(tài)（最大值）： 10µA
CMRR, PSRR（標(biāo)準(zhǔn)）： 56.48dB CMRR，80dB PSRR
傳輸延遲（最大）： 20µs
磁滯： ±1mV
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
安裝類型： 表面貼裝
包裝： 帶卷 (TR)
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
______________________________________________________________________________________
11
3) Calculate R1: R1 = (R3 + R4) x (VHB / VCC). Putting
in the values for this example, R1 = (2.2M + 10k)
x (50mV / 5.0V) = 22.1k.
4) Choose the trip point for VIN rising. This is the
threshold voltage where the comparator output tran-
sitions from low to high as VIN rises above the trip
point. For this example, choose 3.0V.
5) Calculate R2 as follows:
where VTHR is the rising-voltage trip threshold.
Choose a standard value of 15k.
6) Verify trip voltages and hysteresis as follows:
where VTHR is the rising-voltage trip point, and VTHF
is the falling-voltage trip point.
Circuit Layout and Bypassing
Power-supply bypass capacitors are not needed if sup-
ply impedance is low, but 100nF bypass capacitors
should be used when supply impedance is high or
when supply leads are long. Minimize signal lead
lengths to reduce stray capacitance between the input
and output that might cause instability.
IR Receiver
Figure 5 shows an application using the MAX965 as an
infrared receiver. The infrared photodiode creates a
current relative to the amount of infrared light present.
This current creates a voltage across R1. When this
voltage level crosses the reference voltage applied to
the inverting input, the output transitions. Optional R3
provides additional hysteresis for noise immunity.
2-Cell to TTL Logic-Level Shifter
Figure 6 shows an application using the MAX965
to convert a 2-cell voltage-level signal into a TTL-
compatible signal. The supply voltage for the compara-
tor comes from the 2-cell supply. The output is pulled
up to a 5V supply.
Vri
g
VV
x R x
RR
R
V
falling
VV
Rx V
RR
Hysteresis
V
IN
THR
REF
IN
THF
THR
CC
THR
THF
sin :
:
=+
+
=
+
=
1
2
1
34
1
34
R
V
Vx R
R
V
xk
k
M
k
THR
REF
2
1
34
2
1
30
12
22
1
22
1
22
10
14 76
=
+
=
+
=
.
GND
VCC
0.1F
OUT
R3
RD
RPULLUP
REF
MAX965
HYST
Figure 5. IR Receiver
GND
VCC
+5V
2 CELLS
0.1F
OUT
INPUT
REF
MAX965
HYST
Figure 6. 2-Cell to TTL Logic-Level Translator
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