參數(shù)資料
型號(hào)： LTC1297DC
廠商： Linear Technology Corporation
英文描述： Single Chip 12-Bit Data Acquisition Systems
中文描述： 單芯片12位數(shù)據(jù)采集系統(tǒng)
文件頁(yè)數(shù)： 13/24頁(yè)
文件大?。?/td> 466K
代理商： LTC1297DC
13
LTC1292/LTC1297
U
S
A
O
PPLICATI
U
U
Figure 6. Several LTC1292/LTC1297s Sharing One 2-Wire Serial Interface
LTC1292
LTC1297
2 CHANNELS
2 CHANNELS
2 CHANNELS
CS
CS
CS
2
2
2
2
2-WIRE SERIAL
INTERFACE TO OTHER
PERIPHERALS OR
LTC1292/LTC1297s
2
1
0
OUTPUT PORT
SERIAL DATA
MPU
LTC1292
LTC1297
LTC1292
LTC1297
LTC1292/7 F06
Figure 7. Example Ground Plane
for the LTC1292/LTC1297
1
2
3
4
5
6
7
8
22μF
TANTALUM
V
CC
LTC1292/7 F07
LTC1292
LTC1297
0.1μF
CS
V
CC
HORIZONTAL: 10
μ
s/DIV
minimum and the V
CC
supply should have a low output
impedance such as obtained from a voltage regulator
(e.g., LT323A). For high frequency bypassing a 0.1
μ
F
ceramic disk placed in parallel with the 22
μ
F is
recommended. Again the leads should be kept to a
minimum. Figures 8 and 9 show the effects of good and
poor V
CC
bypassing.
Analog Inputs
Because of the capacitive redistribution A/D conversion
techniques used, the analog inputs of the LTC1292/
LTC1297 have capacitive switching input current spikes.
These current spikes settle quickly and do not cause a
problem. If large source resistances are used or if slow
settling op amps drive the inputs, take care to insure that
the transients caused by the current spikes settle completely
before the conversion begins.
use a PC board. The ground pin (Pin 4) should be tied
directly to the ground plane with minimum lead length (a
low profile socket is fine). Figure 7 shows an example of
an ideal LTC1292/LTC1297 ground plane design for a two-
sided board. Of course this much ground plane will not
always be possible, but users should strive to get as close
to this ideal as possible.
Bypassing
For good performance, V
CC
must be free of noise and
ripple. Any changes in the V
CC
voltage with respect to
ground during a conversion cycle can induce errors or
noise in the output code. V
CC
noise and ripple can be kept
below 0.5mV by bypassing the V
CC
pin directly to the
analog ground plane with a minimum of 22
μ
F tantalum
capacitor and with leads as short as possible. The lead
from the device to the V
CC
supply also should be kept to a
HORIZONTAL: 10
μ
s/DIV
Figure 8. Poor V
CC
Bypassing. Noise and
Ripple Can Cause A/D Errors
Figure 9. Good V
CC
Bypassing Keeps
Noise and Ripple on V
CC
Below 1mV
V
V
相關(guān)PDF資料
PDF描述
LTC1297DCN8 Single Chip 12-Bit Data Acquisition Systems
LTC1297DI Single Chip 12-Bit Data Acquisition Systems
LTC1297DIN8 Single Chip 12-Bit Data Acquisition Systems
LTC1292BCJ8 Single Chip 12-Bit Data Acquisition Systems
LTC1292BCN8 Single Chip 12-Bit Data Acquisition Systems
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LTC1297DCN8 功能描述:IC DATA ACQ SYSTEM 12BIT 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1297DCN8#PBF 功能描述:IC DATA ACQ SYSTEM 12BIT 8-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1298CN8 功能描述:IC A/D CONV SAMPLING 12BIT 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
LTC1298CN8#PBF 功能描述:IC A/D CONV SAMPLING 12BIT 8-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6
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