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參數(shù)資料
| 型號(hào)： | KH232 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low Distortion Wideband Op Amp |
| 中文描述： | 低失真寬帶運(yùn)算放大器 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 134K |
| 代理商： | KH232 |
KH232
DATA SHEET
REV. 1A February 2001
5
Other methods of heat sinking may be used, but for
best results, make contact with the base of the KH232
package, use a large thermal capacity heat sink and use
forced air convection.
Low V
CC
Operation: Supply Current Adjustment
The KH232 is designed to operate on supplies as low
as ±5V. In order to improve full bandwidth at reduced
supply voltages, the supply current (I
CC
) must be
increased. The plot of Bandwidth vs. V
CC
, shows the
effect of shorting pins 1 and 2 and pins 8 and 9; this
will increase both bandwidth and supply current. Care
should be taken to not exceed the maximum junction
temperatures;for this reason this technique should not be
used with supplies exceeding ±10V. For intermediate val-
ues of V
CC
, external resistors between pins 1 and 2 and
pins 8 and 9 can be used.
P
(circuit)
= (I
CC
)((+V
CC
)
–
(V
CC
)) where I
CC
= 14mA at ±15V
P
(xxx)
= [(±V
CC
)
–
V
out
–
(I
col
) (R
col
+ 4)] (I
col
) (%Duty)
For positive V
o
and V
CC
, this is the power in the npn
device. For negative V
o
and V
CC
, this is the power in the
pnp device.
I
col
= V
o
/R
L
or 12mA, whichever is greater. (Include feed-
back R in R
L
.)
R
col
is a resistor (33
recommended) between the xxx
collector and ±V
CC
.
The limiting factor for output current and voltage is junction
temperature. Of secondary importance is I
(out)
, which
should not exceed 150mA.
T
j(pnp)
= P
(pnp)
(100 +
θ
ca
) + (P
(cir)
+ P
(npn)
)(
θ
ca
) + T
a
,
similar for T
j(npn)
.
T
j(cir)
= P
(cir)
(48 +
θ
ca
) + (P
(pnp)
+ P
(npn)
)(
θ
ca
) + T
a
.
θ
ca
= 65
°
C/W for the KH232 without heat sink in still air.
35
°
C/W for the KH232 with a Thermalloy 2268A
heat sink in still air.
15
°
C/W for the KH232 with a Thermalloy 2268A
heat sink at 300 ft/min air.
(Thermalloy 2240A works equally as well.)
For example, with the KH232 operating at ±15V while
driving a 100
load at 15V
pp
output (50% duty cycle
pulse waveform, DC = 0), P
(npn)
= P
(pnp)
= 190mW (R
col
= 33) and P
(cir)
= 0.42W.
2268 heat sink and air flow of 300 ft/min the output
transistors
’
T
j
is 31
°
C above ambient and worst case T
j
in
the rest of the circuit is 32
°
C above ambient. In still air,
however, the rise in T
j
is 47
°
C and 48
°
C, respectively.
With no heat sink, the rise in T
j
is 71
°
C and 72
°
C,
respectively! Under most conditions,
HEAT SINKING IS
REQUIRED
.
Then with the Thermalloy
+
-
T
ambient
θ
ca
T
case
48
°
C/W
T
j(circuit)
P
circuit
100
°
C/W
T
j(npn)
P
npn
100
°
C/W
P
pnp
T
j(pnp)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| KH232AI | 功能描述:運(yùn)算放大器 - 運(yùn)放 OP AMP WIDEBAND 3000 V/us 270MHz 100mA RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| KH232AK | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:Low Distortion Wideband Op Amp |
| KH232AM | 功能描述:運(yùn)算放大器 - 運(yùn)放 OP AMP WIDEBAND 3000 V/us 270MHz 100mA RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| KH232HXA | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:Low Distortion Wideband Op Amp |
| KH232HXC | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:Low Distortion Wideband Op Amp |
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