- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2088 > MAX44268EWL+T (Maxim Integrated Products)IC COMPARATOR W/REF DUAL 9WLP PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX44268EWL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR W/REF DUAL 9WLP |
| 產(chǎn)品培訓(xùn)模塊： | Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 通用 |
| 元件數(shù)： | 2 |
| 輸出類型： | 開路漏極 |
| 電壓 - 電源，單路/雙路(±)： | 1.8 V ~ 5.5 V |
| 電壓 - 輸入偏移（最小值）： | 5mV @ 5V |
| 電流 - 輸入偏壓（最小值）： | 0.15nA |
| 電流 - 輸出（標(biāo)準(zhǔn)）： | 50mA |
| 電流 - 靜態(tài)（最大值）： | 1.15µA |
| CMRR, PSRR（標(biāo)準(zhǔn)）： | 80dB PSRR |
| 傳輸延遲（最大）： | 39µs |
| 磁滯： | 6mV |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 9-WFBGA，WLBGA |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
Maxim Integrated Products 10
MAX44268
1.3mm x 1.3mm, Low-Power
Dual Comparator with Reference
Use the following procedure to calculate resistor values.
1) Select R3. Input bias current at IN_+ is less than
15nA. To minimize errors caused by the input bias
current, the current through R3 should be at least
1.5A. Current through R3 at the trip point is (VREF -
VOUT)/R3. Considering the two possible output states
in solving for R3 yields two formulas:
R3 = VREF/IR3 and R3 = [(VCC - VREF)/IR3] - R1
Use the smaller of the two resulting resistor values.
For example, for VCC = 5V, IR3 = -1.5A, R1 =
200kI, and a VREF = 1.236V, the two resistor values
are 827kI and 1.5MI. Therefore, for R3 choose the
standard value of 825kI.
2) Choose the hysteresis band required (VHB). In this
example, the VHB = 50mV.
3) Calculate R2 according to the following equation:
HB
CC
REF
V
R2 (R1 R3)
xR1) R3
(V
V
=
+
+
For this example, insert the value:
50mV
R2 (200k
0.825M )
9.67k
5.3
=
+
=
For this example, choose standard value R2 = 9.76kI.
4) Choose the trip point for VIN rising (VTHR) in such a
way that:
HB
THR
REF
CC
V
V1
V
>+
VTHR is the threshold voltage at which the com-
parator switches its output from low to high, as VIN
rises above the trip point. For this example, choose
VTHR = 3V.
5) Calculate R4 as follows:
THR
REF
1
R4
11
V
--
x R2
R2
R3
V
1
R4
6.93k
3
11
--
1.236V x 9.76
9.76
825
=
=
For this example, choose a standard value of 6.98kI.
6) Verify the trip voltages and hysteresis as follows:
THR
REF
THF
REF
CC
11
1
xR2
VV
R2
R3
R4
11
1
x R2
VV
R2
R1 R3
R4
R2
-x V
R1 R3
=
++
=
++
+
+
The hysteresis network in Figure 2 can be simplified if the
reference voltage is chosen to be at midrail and the trip
points of the comparator are chosen to be symmetrical
about the reference voltage. Use the circuit in Figure 3
if the reference voltage can be designed to be at the
center of the hysteresis band. For the symmetrical case,
follow the same steps outlined in the paragraph above
to calculate the resistor values except that in this case,
resistor R4 approaches infinity (open). So in the previ-
ous example, using comparator B with VREF = 2.5V, if
VTHR = 2.525V and VTHF = 2.475V then using the above
formulas, results in R1 = 200kI, R2 = 9.09kI, and R3 =
825kI, R4 = not installed.
Logic-Level Translator
Due to the open-drain output of the IC, the device can
translate between two different logic levels (Figure 4). If
the internal 4mV hysteresis is not sufficient, then external
resistors can be added to increase the hysteresis as
Figure 3. Simplified External Hysteresis Network if VREF is at
the Center of the Hysteresis Band
VCC
R2
R3
R1
VIN
VREF
GND
OUT
MAX44268
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX44269EWL+T | IC COMPARATOR DUAL LP 9WLP |
| MAX4468EKA+T | IC PREAMP AUDIO MONO AB SOT23-8 |
| MAX4895EETE+T | IC PORT PROTECTOR VGA 16TQFN |
| MAX4928BETN+T | IC DISPLAY-PORT/PCIE SW 56-TQFN |
| MAX516BCWG | IC COMP QUAD DAC-PRGRM 24-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX44269EWL+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX44269EWL+T | 功能描述:校驗(yàn)器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX4426C/D | 功能描述:功率驅(qū)動(dòng)器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4426C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX4426C/D+ | 功能描述:功率驅(qū)動(dòng)器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。