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參數(shù)資料
| 型號： | LT1055C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Precision, High Speed, JFET Input Operational Amplifiers |
| 中文描述： | 高精度，高速度，JFET輸入運算放大器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 360K |
| 代理商： | LT1055C |
8
LT1055/LT1056
APPLICATIO
S I
N
FOR
ATIO
U
The voltage noise spectrum is characterized by a low 1/f
corner in the 20Hz to 30Hz range, significantly lower than
on other competitive JFET input op amps. Of particular
interest is the fact that with any JFET IC amplifier, the
frequency location of the 1/f corner is proportional to the
square root of the internal gate leakage currents and,
therefore, noise doubles every 20
°
C. Furthermore, as
illustrated in the noise versus chip temperature curves,
the 0.1Hz to 10Hz peak-to-peak noise is a strong function
of temperature, while wideband noise (f
0
= 1kHz) is
practically unaffected by temperature.
Consequently, for optimum low frequency noise, chip
temperature should be minimized. For example, operating
an LT1056 at
±
5V supplies or with a 20
°
C/W case-to-
ambient heat sink reduces 0.1Hz to 10Hz noise from
typically 2.5
μ
V
P-P
(
±
15V, free-air) to 1.5
μ
V
P-P
. Similiarly,
the noise of an LT1055 will be 1.8
μ
V
P-P
typically because
of its lower power dissipation and chip temperature.
W
U
High Speed Operation
Settling time is measured in the test circuit shown. This
test configuration has two features which eliminate prob-
lems common to settling time measurments: (1) probe
capacitance is isolated from the “false summing” node,
and (2) it does not require a “flat top” input pulse since the
input pulse is merely used to steer current through the
diode bridges. For more details, please see Application
Note 10.
As with most high speed amplifiers, care should be
taken with supply decoupling, lead dress and component
placement.
When the feedback around the op amp is resistive (R
F
), a
pole will be created with R
F
, the source resistance and
capacitance (R
S
, C
S
), and the amplifier input capacitance
(C
IN
≈
4pF). In low closed-loop gain configurations and
with R
S
and R
F
in the kilohm range, this pole can create
excess phase shift and even oscillation. A small capacitor
(C
F
) in parallel with R
F
eliminates this problem. With R
S
(C
S
+ C
IN
) = R
F
C
F
, the effect of the feedback pole is
completely removed.
0.01 DISC
+
+
+
+
+
–
+
15V
15V
–15V
–15V
15k
15k
15k
15k
10k
4.7k
4.7k
10μF
SOLID
TANTALUM
10μF
SOLID
TANTALUM
10μF
SOLID
TANTALUM
10μF
SOLID TANTALUM
10pF (TYPICAL)
10k
PULSE GEN
INPUT
(5V MIN STEP)
2k
2k
0.01 DISC
0.01 DISC
0.01 DISC
50
2W
LT1055
LT1056
AMPLIFIER
UNDER
TEST
AUT OUTPUT
HP5082-8210
HEWLETT
PACKARD
15V
15V
15V
–15V
= 1N4148
–15V
–15V
1/2
U440
50
1/2
U440
100
DC ZERO
3
3
2N160
2N5160
2N3866
2N3866
LT1055/56 AI04
OUTPUT
TO SCOPE
Settling Time Test Circuit
–
+
R
S
R
F
C
F
C
S
C
IN
OUTPUT
LT1055/56 AI03
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1055CH | 制造商:Linear Technology 功能描述:OP Amp Single GP ±20V 8-Pin TO-5 制造商:Linear Technology 功能描述:OP Amp Single GP 20V 8-Pin TO-5 |
| LT1055CN8 | 功能描述:IC PREC OP-AMP JFET HI-SPD 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 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:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| LT1055CN8#PBF | 功能描述:IC PREC OP-AMP JFET HI-SPD 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應商設備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
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| LT1055CN8PBF | 制造商:Linear Technology 功能描述:Op Amp,Prec,High Speed,J-FET Input |
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