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參數(shù)資料
| 型號(hào)： | LT1498 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 10MHz, 6V/μs, Dual Rail-to-Rail Input and Output Precision C-Load Op Amps(10MHz, 6V/μs,雙路滿幅度輸入和輸出,精密型,電容負(fù)載運(yùn)算放大器) |
| 中文描述： | 10MHz的，6V/μs，雙軌至軌輸入和輸出精度葷負(fù)載運(yùn)算放大器（10MHz的，6V/μs，雙路滿幅度輸入和輸出，精密型，電容負(fù)載運(yùn)算放大器） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 264K |
| 代理商： | LT1498 |
12
LT1498/LT1499
APPLICATIO
S I
N
FOR
ATIO
U
W
U
Figure 1. LT1498 Simplified Schematic Diagram
Input Offset Voltage
The offset voltage changes depending upon which input
stage is active. The input offsets are random, but are
trimmed to less than 475
μ
V. To maintain the precision
characteristics of the amplifier, the change of V
OS
over the
entire input common mode range (CMRR) is guaranteed
to be less than 425
μ
V on a single 5V supply.
Input Bias Current
The input bias current polarity also depends on the input
common mode voltage, as described in the previous
section. When the PNP differential pair is active, the input
bias currents flow out of the input pins; they flow in
opposite direction when the NPN input stage is active. The
offset error due to input bias current can be minimized by
equalizing the noninverting and inverting input source
impedances. This will reduce the error since the input
offset currents are much less than the input bias currents.
Overdrive Protection
To prevent the output from reversing polarity when the
input voltage exceeds the power supplies, two pair of
crossing diodes D1 to D4 are employed. When the input
Q4
Q6
V
BIAS
D6
D5
+IN
D2
Q3
Q7
Q1
I
1
Q9
Q2
D4
D1
D3
–IN
OUT
V
–
V
+
Q5
Q12
Q10
Q8
Q14
1498/99 F01
C1
R1
R6
R3
V
–
C
C
R4
R5
C2
R2
Q11
Q13
Q15
BUFFER
AND
OUTPUT BIAS
R7
voltage exceeds either power supply by approximately
700mV, D1/D2 or D3/D4 will turn on, forcing the output to
the proper polarity. For the phase reversal protection to
work properly, the input current must be less than 5mA.
If
the amplifier is to be severely overdriven, an external
resistor should be used to limit the overdrive current.
Furthermore, the LT1498/LT1499’s input stages are pro-
tected by a pair of back-to-back diodes, D5/D6. When a
differential voltage of more than 0.7V is applied to the
inputs, these diodes will turn on, preventing the Zener
breakdown of the input transistors. The current in D5/D6
should be limited to less than 10mA. Internal resistors R6
and R7 (700
total) limit the input current for differential
input signals of 7V or less. For larger input levels, a
resistor in series with either or both inputs should be
used to limit the current. Worst-case differential input
voltage usually occurs when the output is shorted to
ground. In addition, the amplifier is protected against
ESD strikes up to 3kV on all pins.
Capacitive Load
The LT1498/LT1499 are designed for ease of use. The
amplifier can drive a capacitive load of more than 10nF
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| LT1498_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Driving A-to-D Converters |
| LT1498CN8 | 功能描述:IC OP-AMP R-R IN/OUT DUAL 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:350 V/µs 增益帶寬積:180MHz -3db帶寬:320MHz 電流 - 輸入偏壓:12.5µA 電壓 - 輸入偏移:800µV 電流 - 電源:15mA 電流 - 輸出 / 通道:85mA 電壓 - 電源，單路/雙路(±):2.5 V ~ 12.6 V，±1.25 V ~ 6.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) |
| LT1498CN8#PBF | 功能描述:IC OP-AMP R-R IN/OUT DUAL 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1498CN8PBF | 制造商:Linear Technology 功能描述:LT1498CN8PBF |
| LT1498CN8TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Driving A-to-D Converters |
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