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參數(shù)資料
| 型號(hào)： | LT1637IS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp |
| 中文描述： | OP-AMP, 800 uV OFFSET-MAX, 1.1 MHz BAND WIDTH, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 254K |
| 代理商： | LT1637IS8 |
9
LT1637
APPLICATIU
A Schottky diode in the collector of each NPN transistor of
the NPN input stage allows the LT1637 to operate with
either or both of its inputs above V
+
. At about 0.3V above
V
+
the NPN input transistor is fully saturated and the input
bias current is typically 23
μ
A at room temperature. The
input offset voltage is typically 600
μ
V when operating
above V
+
. The LT1637 will operate with its input 44V above
V
–
regardless of V
+
.
The inputs are protected against excursions as much as
22V below V
–
by an internal 1.3k resistor in series with
each input and a diode from the input to the negative
supply. There is no output phase reversal for inputs up to
5V below V
–
. There are no clamping diodes between the
inputs and the maximum differential input voltage is 44V.
W
U
U
Output
The output voltage swing of the LT1637 is affected by
input overdrive as shown in the typical performance
curves. When monitoring input voltages within 100mV of
V
+
, gain should be taken to keep the output from clipping.
The output of the LT1637 can be pulled up to 25V beyond
V
+
with less than 1nA of leakage current, provided that V
+
is less than 0.5V.
The normally reverse biased substrate diode from the
output to V
–
will cause unlimited currents to flow when the
output is forced below V
–
. If the current is transient and
limited to 100mA, no damage will occur.
The LT1637 is internally compensated to drive at least
200pF of capacitance under any output loading condi-
tions. A 0.22
μ
F capacitor in series with a 150
resistor
between the output and ground will compensate these
amplifiers for larger capacitive loads, up to 4700pF, at all
output currents.
Distortion
There are two main contributors of distortion in op amps:
output crossover distortion as the output transitions from
sourcing to sinking current and distortion caused by
nonlinear common mode rejection. Of course, if the op
amp is operating inverting there is no common mode
induced distortion. When the LT1637 switches between
input stages there is significant nonlinearity in the CMRR.
Lower load resistance increases the output crossover
distortion, but has no effect on the input stage transition
distortion. For lowest distortion the LT1637 should be
operated single supply, with the output always sourcing
current and with the input voltage swing between ground
and (V
+
– 0.9V). See the Typical Performance Character-
istics curves.
Gain
The open-loop gain is less sensitive to load resistance
when the output is sourcing current. This optimizes per-
formance in single supply applications where the load is
returned to ground. The typical performance photo of
Open-Loop Gain for various loads shows the details.
Shutdown
The LT1637 can be shut down two ways: using the
shutdown pin or bringing V
+
to within 0.5V of V
–
. When V
+
is brought to within 0.5V of V
–
both the supply current and
output leakage current drop to less than 10nA. When the
shutdown pin is brought 1.2V above V
–
, the supply
current drops to about 3
μ
A and the output leakage current
is less than 1
μ
A, independent of V
+
. In either case the input
bias current is less than 0.1nA (even if the inputs are 44V
above the negative supply).
The shutdown pin can be taken up to 32V above V
–
. The
shutdown pin can be driven below V
–
, however the pin
current through the substrate diode should be limited with
an external resistor to less than 10mA.
Input Offset Nulling
The input offset voltage can be nulled by placing a 10k
potentiometer between Pins 1 and 8 with its wiper to V
–
(see Figure 1). The null range will be at least
±
3mV.
Figure 1. Input Offset Nulling
LT1637
10k
1637 F01
V
–
1
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1637CN8 | 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp |
| LT1637CS8 | 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp |
| LT1637 | 1.1MHz, 0.4V/μs Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp(1.1MHz, 0.4V/μs 微功耗單路滿幅度輸入和輸出運(yùn)算放大器) |
| LT1638CMS8 | 1.2MHz, 0.4V/us Over-The-TopTM Micropower Rail-to-Rail Input and Output Op Amps |
| LT1638IS8 | 1.2MHz, 0.4V/us Over-The-TopTM Micropower Rail-to-Rail Input and Output Op Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1637IS8#PBF | 功能描述:IC OPAMP R-R I/O 1.1MHZ 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LT1637IS8#TR | 功能描述:IC OPAMP R-R I/O 1.1MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LT1637IS8#TRPBF | 功能描述:IC OPAMP R-R I/O 1.1MHZ 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LT1637MPS8 | 制造商:Linear Technology 功能描述:OP Amp Single GP R-R I/O ±22V/44V 8-Pin SOIC N 制造商:Linear Technology 功能描述:OP Amp Single GP R-R I/O 22V/44V 8-Pin SOIC N |
| LT1637MPS8#PBF | 功能描述:IC OPAMP R-R I/O 1.1MHZ 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°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:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
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