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參數資料
| 型號： | LTC1400IS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Complete SO-8, 12-Bit, 400ksps ADC with Shutdown |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數： | 11/20頁 |
| 文件大小： | 515K |
| 代理商： | LTC1400IS8 |
11
LTC1400
APPLICATIO
S I
N
FOR
ATIO
U
W
U
error adjustment. Figure 10b shows offset and full-scale
adjustment. Offset error must be adjusted before full-
scale error. Zero offset is achieved by applying 0.5mV (i.e.,
0.5LSB) at the input and adjusting the offset trim until the
LTC1400 output code flickers between 0000 0000 0000
and 0000 0000 0001. For zero full-scale error, apply an
analog input of 4.0945V (FS – 1.5LSB or last code transi-
tion) at the input and adjust R5 until the LTC1400 output
code flickers between 1111 1111 1110 and 1111 1111
1111.
Bipolar Offset and Full-Scale Error Adjustments
Bipolar offset and full-scale errors are adjusted in a similar
fashion to the unipolar case. Bipolar offset error adjust-
ment is achieved by applying an input voltage of –0.5mV
(–0.5LSB) to the input in Figure 10c and adjusting the op
amp until the ADC output code flickers between 0000 0000
0000 and 1111 1111 1111. For full-scale adjustment, an
input voltage of 2.0465V (FS – 1.5LSBs) is applied to the
input and R5 is adjusted until the output code flickers
between 0111 1111 1110 and 0111 1111 1111.
BOARD LAYOUT AND BYPASSING
To obtain the best performance from the LTC1400, a
printed circuit board is required. Layout for the printed
circuit board should ensure that digital and analog signal
lines are separated as much as possible. In particular, care
should be taken not to run any digital track alongside an
analog signal track or underneath the ADC. The analog
input should be screened by GND.
High quality tantalum and ceramic bypass capacitors
should be used at the V
CC
and V
REF
pins as shown in the
Typical Application on the first page of this data sheet. For
the bipolar mode, a 0.1
μ
F ceramic provides adequate
bypassing for the V
SS
pin. For optimum performance, a
10
μ
F surface mount AVX capacitor with a 0.1
μ
F ceramic is
recommended for the V
CC
and V
REF
pins. The capacitors
must be located as close to the pins as possible. The traces
connecting the pins and the bypass capacitors must be
kept short and should be made as wide as possible. In
unipolar mode operation, V
SS
should be isolated from any
noise source before shorting to the GND pin.
LTC1400 F10a
–
+
R2
10k
R3
10k
R1
50
R4
100
FULL-SCALE
ADJUST
V
IN
A1
LTC1400
A
IN
GND
ADDITIONAL PINS OMITTED FOR CLARITY
±
20LSB TRIM RANGE
Figure 10a. LTC1400 Full-Scale Adjust Circuit
LTC1400 F10b
–
+
R2
10k
R9
20
R4
100k
R5
4.3k
FULL-SCALE
ADJUST
R3
100k
R6
400
R1
10k
10k
ANALOG
INPUT
0V TO 4.096V
A1
5V
R8
10k
OFFSET
ADJUST
R7
100k
5V
A
IN
LTC1400
Figure 10b. LTC1400 Offset and Full-Scale Adjust Circuit
LTC1400 F10c
–
+
R2
10k
R4
100k
R5
4.3k
FULL-SCALE
ADJUST
R3
100k
R6
200
R1
10k
ANALOG
INPUT
±
2.048V
A1
R8
20k
OFFSET
ADJUST
R7
100k
5V
–5V
A
IN
LTC1400
Figure 10c. LTC1400 Bipolar Offset and Full-Scale Adjust Circuit
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC1400IS8#PBF | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:microPOWER™ 位數:8 采樣率（每秒）:1M 數據接口:串行，SPI? 轉換器數目:1 功率耗散（最大）:- 電壓電源:模擬和數字 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® 輸入數目和類型:8 個單端，單極 產品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC1400IS8#TR | 功能描述:IC ADC 12BIT 400KSPS SHTDN 8SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率（每秒）:45k 數據接口:串行 轉換器數目:2 功率耗散（最大）:315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端，單極 |
| LTC1400IS8#TRPBF | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率（每秒）:45k 數據接口:串行 轉換器數目:2 功率耗散（最大）:315mW 電壓電源:模擬和數字 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) 輸入數目和類型:2 個單端，單極 |
| LTC1400IS8PBF | 制造商:Linear Technology 功能描述:ADC SAR 400ksps 12-Bit Serial SOIC8 |
| LTC1401CS8 | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:2,500 系列:- 位數:16 采樣率（每秒）:15 數據接口:MICROWIRE?，串行，SPI? 轉換器數目: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 供應商設備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
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