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參數(shù)資料
| 型號： | LT1126CS8#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP-AMP DECOMPENSAT DUAL 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 11 V/µs |
| 增益帶寬積： | 65MHz |
| 電流 - 輸入偏壓： | 8nA |
| 電壓 - 輸入偏移： | 25µV |
| 電流 - 電源： | 2.6mA |
| 電壓 - 電源，單路/雙路(±)： | ±4 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) |
LT1126/LT1127
11267fa
7
–
+
OUTPUT
1126-7 AI01
RS
CS
RF
CF
CIN
FREQUENCY (Hz)
GAIN
ERROR
(%)
0.01
0.1
1.0
0.1
10
100
1126-7 TA03
0.001
1
GAIN ERROR =
CLOSED LOOP GAIN
OPEN LOOP GAIN
TYPICAL
PRECISION
OP AMP
LT1126/LT1127
–
+
OUTPUT
1126-7 TA02
365
1%
INPUT
15k
5%
340k
1%
20k
TRIM
+15V
–15V
RN60C FILM RESISTORS
THE HIGH GAIN AND WIDE BANDWIDTH OF THE LT1126/LT1127 IS USEFUL IN LOW FREQUENCY HIGH CLOSED
LOOP GAIN AMPLIFIER APPLICATIONS. A TYPICAL PRECISION OP AMP MAY HAVE AN OPEN LOOP GAIN OF ONE
MILLION WITH 500kHz BANDWIDTH. AS THE GAIN ERROR PLOT SHOWS, THIS DEVICE IS CAPABLE OF 0.1%
AMPLIFYING ACCURACY UP TO 0.3Hz ONLY. EVEN INSTRUMENTATION RANGE SIGNALS CAN VARY AT A FASTER
RATE. THE LT1126/LT1127 “GAIN PRECISION — BANDWIDTH PRODUCT” IS 330 TIMES HIGHER, AS SHOWN.
LT1126
High Speed Operation
When the feedback around the op amp is resistive (RF), a
pole will be created with RF, the source resistance and
capacitance (RS, CS), and the amplifier input capacitance
(CIN ≈ 2pF). In low closed loop gain configurations and
Gain Error vs Frequency
Closed Loop Gain = 1000
U
S
A
O
PPLICATI
TYPICAL
Gain 1000 Amplifier with 0.01% Accuracy, DC to 5Hz
with RS and RF in the kilohm range, this pole can create
excess phase shift and even oscillation. A small capacitor
(CF) in parallel with RF eliminates this problem. With
RS (CS + CIN) = RF CF, the effect of the feedback pole is
completely removed.
APPLICATIO S I FOR ATIO
WU
U
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