參數(shù)資料
型號: LT1795IFE#PBF
廠商: Linear Technology
文件頁數(shù): 2/12頁
文件大?。?/td> 0K
描述: IC AMP CURR FEEDBCK DUAL 20TSSOP
標(biāo)準包裝: 74
放大器類型: 電流反饋
電路數(shù): 2
轉(zhuǎn)換速率: 900 V/µs
-3db帶寬: 65MHz
電流 - 輸入偏壓: 10µA
電壓 - 輸入偏移: 3000µV
電流 - 電源: 29mA
電流 - 輸出 / 通道: 1A
電壓 - 電源,單路/雙路(±): ±5 V ~ 15 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)裸露焊盤
供應(yīng)商設(shè)備封裝: 20-TSSOP-EP
包裝: 管件
10
LT1795
1795fa
SW Package
20-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
Figure 9 shows the effect of the network on a 200pF load.
Without the optional compensation, there is a 6dB peak at
85MHz caused by the effect of the capacitance on the
output stage. Adding a 0.01
F bypass capacitor between
the output and the COMP pins connects the compensation
APPLICATIONS INFORMATION
WU
U
Figure 9
FREQUENCY (MHz)
1
VOLTAGE
GAIN
(dB)
14
12
10
8
6
4
2
0
–2
–4
–6
10
100
1795 F09
VS = ±15V
CL = 200pF
RF = 3.4k
NO
COMPENSATION
RF = 1k
COMPENSATION
RF = 3.4k
COMPENSATION
PACKAGE DESCRIPTIO
U
and greatly reduces the peaking. A lower value feedback
resistor can now be used, resulting in a response which is
flat to
±1dB to 45MHz. The network has the greatest effect
for CL in the range of 0pF to 1000pF.
Although the optional compensation works well with
capacitive loads, it simply reduces the bandwidth when it
is connected with resistive loads. For instance, with a 25
load, the bandwidth drops from 48MHz to 32MHz when
the compensation is connected. Hence, the compensation
was made optional. To disconnect the optional compensa-
tion, leave the COMP pin open.
DEMO BOARD
A demo board (DC261A) is available for evaluating the
performence of the LT1795. The board is configured as a
differential line driver/receiver suitable for xDSL applica-
tions. For details, consult your local sales representative.
S20 (WIDE) 0502
NOTE 3
.496 – .512
(12.598 – 13.005)
NOTE 4
20
N
19
18
17
16
15
14
13
1
23
4
5
6
78
.394 – .419
(10.007 – 10.643)
910
N/2
11
12
.037 – .045
(0.940 – 1.143)
.004 – .012
(0.102 – 0.305)
.093 – .104
(2.362 – 2.642)
.050
(1.270)
BSC
.014 – .019
(0.356 – 0.482)
TYP
0
° – 8° TYP
NOTE 3
.009 – .013
(0.229 – 0.330)
.016 – .050
(0.406 – 1.270)
.291 – .299
(7.391 – 7.595)
NOTE 4
× 45°
.010 – .029
(0.254 – 0.737)
.420
MIN
.325
±.005
RECOMMENDED SOLDER PAD LAYOUT
.045
±.005
N
1
2
3
N/2
.050 BSC
.030
±.005
TYP
.005
(0.127)
RAD MIN
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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