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參數(shù)資料
| 型號： | LTC1198-2BCS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 8-Bit, SO-8, 1MSPS ADCs with Auto-Shutdown Options |
| 中文描述： | 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 16/28頁 |
| 文件大小： | 452K |
| 代理商： | LTC1198-2BCS8 |
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16
LTC1196/LTC1198
U
S
A
Dummy Bits
The last 2 bits of the input word following the MUX
Address are dummy bits. Either bit can be a “l(fā)ogical
one” or a “l(fā)ogical zero.” These 2 bits allow the ADC 2.5
clocks to acquire the input signal after the channel
selection.
O
PPLICATI
U
U
A/D Conversion Result
Both the LTC1196 and the LTC1198 have the A/D
conversion result appear on the D
OUT
line after two null
bits (see Operating Sequence in Figures 1 and 2). Data
on the D
OUT
line is updated on the rising edge of the CLK
line. The D
OUT
data should also be captured on the
rising CLK edge by the digital systems. Data on the D
OUT
line remains valid for a minimum time of t
hDO
(30ns at
5V) to allow the capture to occur (see Figure 3).
Figure 3. Voltage Waveform for D
OUT
Delay Time,
t
dDO
and t
hDO
Unipolar Transfer Curve
The LTC1196/LTC1198 are permanently configured for
unipolar only. The input span and code assignment for
this conversion type are shown in the following figures.
Unipolar Transfer Curve
Unipolar Output Code
OUTPUT CODE
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
INPUT VOLTAGE
V
REF
– 1LSB
V
REF
– 2LSB
1LSB
0V
INPUT VOLTAGE
(V
REF
= 5.000V)
4.9805V
4.9609V
0.0195V
0V
1196/98 AI05
Operation with D
IN
and D
OUT
Tied Together
The LTC1198 can be operated with D
IN
and D
OUT
tied
together. This eliminates one of the lines required to
communicate to the digital systems. Data is transmitted in
both directions on a single wire. The pin of the digital
systems connected to this data line should be configurable
as either an input or an output. The LTC1198 will take
control of the data line and drive it low on the 5th falling
CLK edge after the start bit is received (see Figure 4).
Therefore the port line of the digital systems must be
switched to an input before this happens to avoid a
conflict.
REDUCING POWER CONSUMPTION
The LTC1196/LTC1198 can sample at up to a 1MHz rate,
drawing only 50mW from a 5V supply. Power consump-
tion can be reduced in two ways. Using a 3V supply lowers
the power consumption on both devices by a factor of five,
to 10mW. The LTC1198 can reduce power even further
because it shuts down whenever it is not converting.
Figure 5 shows the supply current versus sample rate for
the LTC1196 and LTC1198 on 3V and 5V. To achieve such
a low power consumption, especially for the LTC1198,
several things must be taken into consideration.
Shutdown (LTC1198)
Figure 2 shows the operating sequence of the LTC1198.
The converter draws power when the CS pin is low and
powers itself down when that pin is high. For lowest power
consumption in shutdown, the CS pin should be driven
with CMOS levels (0V to V
CC
) so that the CS input buffer
of the converter will not draw current.
0
1
V
R
–
V
R
–
V
R
V
IN
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0
1196/98 AI04
CLK
D
OUT
t
dDO
1196/98 TC03
V
IH
t
hDO
V
OH
V
OL
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| LTC1198-2BCS8#PBF | 功能描述:IC ADC 8BIT 750KHZ SAMPL 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| LTC1198-2BCS8#TR | 功能描述:IC ADC 8BIT 750KHZ SHUTDWN 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1198-2BCS8#TRPBF | 功能描述:IC ADC 8BIT 750KHZ SAMPL 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1198-2BCS8-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Bit, SO-8, 1Msps ADCs with Auto-Shutdown Options |
| LTC1198-2BCS8-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Bit, SO-8, 1Msps ADCs with Auto-Shutdown Options |
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