參數(shù)資料
型號(hào): LT1787HVIMS8
廠(chǎng)商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 模擬信號(hào)調(diào)理
英文描述: Precision, High Side Current Sense Amplifiers
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO8
封裝: PLASTIC, MSOP-8
文件頁(yè)數(shù): 11/12頁(yè)
文件大?。?/td> 205K
代理商: LT1787HVIMS8
11
LT1787/LT1787HV
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
N
U
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
MSOP (MS8) 1098
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.021
±
0.006
(0.53
±
0.015)
0
°
– 6
°
TYP
SEATING
PLANE
0.007
(0.18)
0.040
±
0.006
(1.02
±
0.15)
0.012
(0.30)
REF
0.006
±
0.004
(0.15
±
0.102)
0.034
±
0.004
(0.86
±
0.102)
0.0256
(0.65)
BSC
1
2
3
4
0.193
±
0.006
(4.90
±
0.15)
8
7
6
5
0.118
±
0.004*
(3.00
±
0.102)
0.118
±
0.004**
(3.00
±
0.102)
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)
×
45
°
0
°
– 8
°
TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1
2
3
4
0.150 – 0.157**
(3.810 – 3.988)
8
7
6
5
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
Adjusting Gain Setting
The LT1787 may be used in all operating modes with an
external resistor used in place of the internal 20k R
OUT
resistor. When an external resistor is used, leave the V
BIAS
pin floating or connected to the V
OUT
pin. This will remove
the internal R
OUT
from the circuit.
The voltage gain will be gm R
OUT
where gm is the
LT1787’s transconductance, 400
μ
A/V typical. A nominal
gain of 40 may be obtained with an external 100k resistor
used in place of the internal 20k R
OUT
:
A
V
= gm R
OUT
= 400
μ
A/V 100k = 40
The transconductance gm is set by on-chip resistors on
the LT1787. These resistors match well but have loose
absolute tolerance. This will normally require that the
external gain setting resistor be trimmed for initial accu-
racy. After trimming, the temperature stability of the gm
and therefore gain will be –200ppm/
°
C.
The only limitations placed upon the resistor choice is care
must be taken not to saturate the internal circuitry by
violating the V
OMAX
specification of V
S
+ –0.75V.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
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