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參數(shù)資料
| 型號： | LTC2428C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 56-BGA MICROSTAR JUNIOR -40 to 85 |
| 中文描述： | 4-/8-Channel 20位ADC的無延遲uPower |
| 文件頁數(shù)： | 14/28頁 |
| 文件大?。?/td> | 317K |
| 代理商： | LTC2428C |
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14
LTC2424/LTC2428
APPLICATIO
S I
N
FOR
ATIO
U
W
U
At 100 samples/second, the LTC2424/LTC2428 can be
used to capture transient data. This is useful for monitor-
ing settling or auto gain ranging in a system. The LTC2424/
LTC2428 can monitor signals at an output rate of 100
samples/second. After acquiring 100 samples/second data,
the F
O
pin may be driven LOW enabling 60Hz rejection to
110dB and the highest possible DC accuracy. The no
latency architecture of the LTC2424/LTC2428 allows con-
secutive readings (one at 100 samples/second the next at
7.5 samples/second) without interaction between the two
readings.
As shown in Figure 11, the LTC2424/LTC2428 can cap-
ture transient data with 90dB of dynamic range (with a
INPUT VOLTAGE (V)
0
T
–2
0
2
5
24248 F10
–4
–6
–10
–8
6
4
V
CC
= 5V
V
REF
= 5V
Figure 10. Total Unadjusted Error at
7.5 Samples/Second (No Averaging)
300mV
P-P
input signal at 2Hz). The exceptional DC
performance of
the LTC2424/LTC2428 enables signals to
be digitized independent of a large DC offset. Figures 12a
and 12b show the dynamic performance with a 15Hz
signal superimposed on a 2V DC level. The same signal
with no DC level is shown in Figures 12c and 12d.
SERIAL INTERFACE
The LTC2424/LTC2428 transmit the conversion results,
program the channel selection, and receive the start of
conversion command through a synchronous 4-wire in-
terface (SCK = CLK, CSADC = CSMUX). During the conver-
sion and sleep states, this interface can be used to assess
the converter status. While in the sleep state this interface
may be used to program an input channel. During the data
output state, it is used to read the conversion result.
ADC Serial Clock Input/Output (SCK)
The serial clock signal present on SCK (Pin 25) is used to
synchronize the data transfer. Each bit of data is shifted out
of the SDO pin on the falling edge of the serial clock.
In the Internal SCK mode of operation, the SCK pin is an
output and the LTC2424/LTC2428 creates its own serial
clock by dividing the internal conversion clock by 8. In the
External SCK mode of operation, the SCK pin is used as
input. The internal or external SCK mode is selected on
power-up and then reselected every time a HIGH-to-LOW
transition is detected at the CSADC pin. If SCK is HIGH or
0.5
1
TIME (SEC)
1.5
2
2.5
A
0
0.05
0.10
24248 F11a
–0.05
–0.10
–0.20
–0.15
0.20
500ms
0.15
f
IN
= 2Hz
M
–60
–40
–20
0
–80
–100
–120
2Hz
100sps
0V OFFSET
24248 F11b
FREQUENCY (Hz)
25
50
0
Figure 11b. Output FFT
Figure 11a. Digitized Waveform
Figure 11. Transient Signal Acquisition
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| LTC2428CG#PBF | 功能描述:IC ADC 20BIT 8CH MICROPWR 28SSOP 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: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 供應商設備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC2428CG#TR | 功能描述:IC ADC 20BIT 8CH MICROPWR 28SSOP 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: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） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2428CG#TRPBF | 功能描述:IC ADC 20BIT 8CH MICROPWR 28SSOP 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: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） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2428CGPBF | 制造商:Linear Technology 功能描述:ADC,LTC2428C 20bit D-S 8 ch SPI SSOP |
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