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參數(shù)資料
| 型號： | LT1789CS8-1#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC INSTRUMENT AMP R-R OUT 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 0.026 V/µs |
| 增益帶寬積： | 60kHz |
| 電流 - 輸入偏壓： | 17nA |
| 電壓 - 輸入偏移： | 30µV |
| 電流 - 電源： | 85µA |
| 電流 - 輸出 / 通道： | 8.5mA |
| 電壓 - 電源，單路/雙路(±)： | 2.2 V ~ 36 V，±1.1 V ~ 18 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | LT1789CS8-1TR LT1789CS81TR |
LT1789-1/LT1789-10
20
1789fc
APPLICATIONS INFORMATION
Output Voltage vs Input Common Mode Voltage
All instrumentation amplifiers have limiting factors that
can cause an output to be invalid (the output is not equal
to the input differential voltage multiplied by the gain)
even though the output appears to be operating in a linear
region. Limiting factors such as input voltage range and
output swing can be easily measured, however, there are
also internal nodes that can limit. These internal nodes
cannot be measured externally and can lead to erroneous
output readings.
To ensure a valid output for a given input common mode
voltage and input differential voltage, the following four
limiting factors must be taken into consideration (refer to
the block diagram):
1) The input voltage ranges of the input amplifiers A1 and
A2.
2) The output swings of the input amplifiers A1 and A2
(internal nodes).
3) The input voltage range of the output amplifier A3
(internal node).
4) The output swing of the output amplifier A3.
These limits can be determined using the relationships
below.
1) The input voltage range limits can be found in the
electrical tables.
2) The output voltages of the input amplifiers A1 and A2
can be found by the following formulas:
VOUT A1 = (VD/2)(G)(R1/R2) + VCM + 0.6V
VOUT A2 = (–VD/2)(G)(R1/R2) + VCM + 0.6V
Where VD is the input differential voltage and VCM is the
input common mode voltage.
The typical output swing limits for A1 and A2 can be found
in the Output Swing vs Load Current typical performance
curve, using R1 + R2 as the load resistance.
This limitation usually becomes dominant when gain is
taken in the input stage and the common mode input
voltage is close to either supply rail.
The LT1789-10 is less susceptible to this limiting factor
because the gain is taken in the output stage.
3) The voltage on the inputs to the output amplifier A3
can be determined by the following formula:
VIN A3 = (VOUT A1 – VREF)(R2/(R1 + R2))
The input voltage range of A3 has the same input limits as
the LT1789-1. This limiting factor is more prevalent with
single supplies, where both the reference voltage and input
common mode voltage are near V+. This is also more of
a concern with the LT1789-10 because the ratio of R1:R2
is 1:10 instead of 1:1.
4) The output voltage swing limits are also found in the
electrical tables.
The Output Voltage vs Input Common Mode Voltage typical
performance curves show the regions of operation for the
three supply voltages specified.
Single Supply Operation
There are usually two types of input signals that need
to be processed; differential signals, like the output of a
bridge or single ended signals, such as the output from
a thermistor. Both signals require special consideration
when operating with a single supply.
When processing differential signals , REF (Pin 5) must
be brought above the negative supply (Pin 4) to allow the
output to process both the positive and negative going input
signal. The maximum output operating range is obtained
by setting the voltage on the REF pin to half supply. This
must be done with a low impedance source to minimize
CMRR and gain errors.
For single ended input signals, the REF pin can be at the
same potential as the negative supply provided the output
of the instrumentation amplifier remains inside the specified
operating range. This maximizes the output range, however
the smallest input signal that can be processed is limited
by the output swing to the negative supply.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1789CS8-1-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers |
| LT1789IS8-1 | 功能描述:IC INSTRUMENT AMP R-R OUT 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| LT1789IS8-1#PBF | 功能描述:IC INSTRUMENT AMP R-R OUT 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 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 |
| LT1789IS8-1#PBF | 制造商:Linear Technology 功能描述:IC INSTRUMENT AMP 60KHZ 117DB SOIC-8 制造商:Linear Technology 功能描述:IC, INSTRUMENT AMP, 60KHZ, 117DB, SOIC-8 |
| LT1789IS8-1#TR | 功能描述:IC INSTRUMENT AMP R-R OUT 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 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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