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參數(shù)資料
| 型號(hào)： | LTC2054 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Low Power Zero-Drift Operational Amplifiers |
| 中文描述： | 低功耗零漂移運(yùn)算放大器 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 199K |
| 代理商： | LTC2054 |
7
LTC2054/LTC2054HV
2054f
reduce this form of clock feedthrough, use smaller valued
gain setting resistors and minimize the source resistance
at the input. If the resistance seen at the inputs is less than
10k, this form of clock feedthrough is less than the amount
of residue clock feedthrough from the first form described
above.
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed loop gain.
Input bias current is defined as the DC current into the
input pins of the op amp. The same current spikes that
cause the second form of clock feedthrough described
above, when averaged, dominate the DC input bias current
of the op amp below 70
°
C.
At temperatures above 70
°
C, the leakage of the ESD
protection diodes on the inputs increases the input bias
currents of both inputs in the positive direction, while the
current caused by the charge injection stays relatively
constant. At elevated temperatures (above 85
°
C) the
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
APPLICATIO
S I
N
FOR
ATIO
U
Clock Feedthrough, Input Bias Current
The LTC2054 uses auto-zeroing circuitry to achieve an
almost zero DC offset over temperature, common mode
voltage, and power supply voltage. The frequency of the
clock used for auto-zeroing is typically 1.0kHz. The term
clock feedthrough is broadly used to indicate visibility of
this clock frequency in the op amp output spectrum. There
are typically two types of clock feedthrough in auto zeroed
op amps like the LTC2054.
The first form of clock feedthrough is caused by the
settling of the internal sampling capacitor and is input
referred; that is, it is multiplied by the closed loop gain of
the op amp. This form of clock feedthrough is independent
of the magnitude of the input source resistance or the
magnitude of the gain setting resistors. The LTC2054 has
a residue clock feedthrough of less then 0.2
μ
V
RMS
input
referred at 1.0kHz.
The second form of clock feedthrough is caused by the
small amount of charge injection occurring during the
sampling and holding of the op amp’s input offset voltage.
The current spikes are multiplied by the impedance seen
at the input terminals of the op amp, appearing at the
output multiplied by the closed loop gain of the op amp. To
W
U
TEST CIRCUITS
–
+
LTC2054
V
+
V
–
10
1
2
3
4
5
R
L
2054 TC01
100k
OUTPUT
–
+
LTC2054
–
+
LT1012
10
1
3
4
2054 TC02
100k
475k
475k
316k
158k
0.1
μ
F
0.01
μ
F
0.01
μ
F
TO X-Y
RECORDER
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
Electrical Characteristics
Test Circuit
DC-10Hz Noise Test Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2054CS5 | Low Power Zero-Drift Operational Amplifiers |
| LTC2054HV | Low Power Zero-Drift Operational Amplifiers |
| LTC2054HVCS5 | Low Power Zero-Drift Operational Amplifiers |
| LTC2054HVIS5 | Low Power Zero-Drift Operational Amplifiers |
| LTC2054IS5 | Low Power Zero-Drift Operational Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2054CS5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Power Zero-Drift Operational Amplifiers |
| LTC2054CS5#PBF | 制造商:Linear Technology 功能描述:SP Amp Zero Drift Amplifier Single R-R O/P 6V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:OP-AMP ZERO DRIFT 500KHZ 0. 制造商:Linear Technology 功能描述:OP-AMP, ZERO DRIFT, 500KHZ, 0.5V/us, TSOT-23-5; Op Amp Type:Zero Drift; No. of Amplifiers:1; Slew Rate:0.5V/s; Supply Voltage Range:2.7V to 6V; Amplifier Case Style:TSOT-23; No. of Pins:5; Bandwidth:500kHz; Package / Case:5-TSOT-23 ;RoHS Compliant: Yes |
| LTC2054CS5#TR | 功能描述:IC OPAMP 0-DRIFT SGL LP TSOT23-5 RoHS:否 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):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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-SO 包裝:帶卷 (TR) |
| LTC2054CS5#TRM | 功能描述:IC OPAMP 0-DRIFT SGL LP TSOT23-5 RoHS:否 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):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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-SO 包裝:帶卷 (TR) |
| LTC2054CS5#TRMPBF | 功能描述:IC OPAMP SGL 0-DRIFT LP TSOT23-5 RoHS:是 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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