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參數資料
型號: LTC6912HGN-1#PBF
廠商: Linear Technology
文件頁數: 1/24頁
文件大小: 0K
描述: IC PGA DIGITAL R-R DUAL 16SSOP
標準包裝: 100
放大器類型: 可編程增益
電路數: 2
輸出類型: 滿擺幅
轉換速率: 26 V/µs
增益帶寬積: 33MHz
電壓 - 輸入偏移: 125µV
電流 - 電源: 2.25mA
電流 - 輸出 / 通道: 35mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 10.5 V,±2.7 V ~ 5.25 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 管件
LTC6912
1
6912fa
FEATURES
TYPICAL APPLICATIO
U
2 Channels with Independent Gain Control
LTC6912-1: (0, 1, 2, 5, 10, 20, 50, and 100V/V)
LTC6912-2: (0, 1, 2, 4, 8, 16, 32, and 64V/V)
Offset Voltage = 2mV Max (–40
°C to 85°C)
Channel-to-Channel Gain Matching of 0.1dB Max
3-Wire SPI
TM Interface
Extended Gain-Bandwidth at High Gains
Wired-OR Outputs Possible (2:1 Analog MUX
Function)
Low Power Hardware Shutdown (GN-16 Only,
2
A Max at 2.7V)
Rail-to-Rail Input Range
Rail-to-Rail Output Swing
Single or Dual Supply: 2.7V to 10.5V Total
Input Noise: 12.6nV/
√Hz
Total System Dynamic Range to 115dB
16-Pin GN (SSOP) or 12-Pin DFN Package Options
Data Acquisition Systems
Dynamic Gain Changing
Automatic Ranging Circuits
Automatic Gain Control
Dual Programmable
Gain Amplifiers with
Serial Digital Interface
The LTC
6912 is a family of dual channel, low noise,
digitally programmable gain amplifiers (PGA) that are
easy to use and occupy very little PC board space. The
gains for both channels are independently programmable
using a 3-wire SPI interface to select voltage gains of 0, 1,
2, 5, 10, 20, 50, and 100V/V (LTC6912-1 ); and 0, 1, 2, 4,
8, 16, 32, and 64V/V (LTC6912-2). All gains are inverting.
The LTC6912 family consists of 2 matched amplifiers with
rail-to-rail outputs. When operated with unity gain, they
will also process rail-to-rail input signals. A half-supply
reference generated internally at the AGND pin supports
single power supply applications. Operating from single
or split supplies from 2.7V to 10.5V total, the LTC6912-X
family is offered in tiny SSOP and DFN-12 Packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
INA
AGND
INB
1
F
0.1
F
VINA
VINB
VOUTA = GAINA VINA
VOUTB = GAINB VINB
OUT A
OUT B
LTC6912-X
V+
3V
V
SHDN
CS/LD
DATA
CLK
SHDN
CS/LD
DIN
5
6
7
8
10
9
DGND
DOUT
2
12
14
3
4
15
13
CHB
CHA
3-WIRE
SPI
INTERFACE
6912 TA01a
FREQUENCY (kHz)
0.1
GAIN
(dB)
40
30
20
10
0
–10
1
10
100
1000
6912 TA01b
10000
GAIN OF 64
GAIN OF 32
GAIN OF 16
GAIN OF 8
GAIN OF 4
GAIN OF 2
GAIN OF 1
VS = ±2.5V
VIN = 10mVRMS
LTC6912-2
Frequency Response
A Dual, Matched Low Noise PGA (16-Lead SSOP Package)
DESCRIPTIO
U
All other trademarks are the property of their respective owners.
APPLICATIO S
U
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