- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377770 > LTC2440IGN (LINEAR TECHNOLOGY CORP) 24-Bit High Speed Differential delta-sigma ADC with Selectable Speed/Resolution PDF資料下載
參數(shù)資料
| 型號： | LTC2440IGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 24-Bit High Speed Differential delta-sigma ADC with Selectable Speed/Resolution |
| 中文描述： | 1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 10/28頁 |
| 文件大?。?/td> | 316K |
| 代理商： | LTC2440IGN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LTC2440
10
sn2440, 2440fas
operation cycle and data out format is compatible with the
LTC2410.
Initially, the LTC2440 performs a conversion. Once the
conversion is complete, the device enters the sleep state.
While in this sleep state, power consumption is reduced
below 10
μ
A. The part remains in the sleep state as long as
CS is HIGH. The conversion result is held indefinitely in a
static shift register while the converter is in the sleep state.
Once CS is pulled LOW, the device begins outputting the
conversion result. There is no latency in the conversion
result. The data output corresponds to the conversion just
performed. This result is shifted out on the serial data out
pin (SDO) under the control of the serial clock (SCK). Data
is updated on the falling edge of SCK allowing the user to
reliably latch data on the rising edge of SCK (see Figure 3).
The data output state is concluded once 32-bits are read
out of the ADC or when CS is brought HIGH. The device au-
tomatically initiates a new conversion and the cycle repeats.
Through timing control of the CS, SCK and EXT pins, the
LTC2440 offers several flexible modes of operation
(internal or external SCK). These various modes do not
require programming configuration registers; moreover,
they do not disturb the cyclic operation described above.
These modes of operation are described in detail in the
Serial Interface Timing Modes section.
Ease of Use
The LTC2440 data output has no latency, filter settling
delay or redundant data associated with the conversion
cycle. There is a one-to-one correspondence between the
conversion and the output data. Therefore, multiplexing
multiple analog voltages is easy. Speed/resolution ad-
justments may be made seamlessly between two conver-
sions without settling errors.
The LTC2440 performs offset and full-scale calibrations
every conversion cycle. This calibration is transparent to
the user and has no effect on the cyclic operation de-
scribed above. The advantage of continuous calibration is
extreme stability of offset and full-scale readings with re-
spect to time, supply voltage change and temperature drift.
APPLICATIU
W
U
U
Power-Up Sequence
The LTC2440 automatically enters an internal reset state
when the power supply voltage V
CC
drops below
approximately 2.2V. This feature guarantees the integrity
of the conversion result and of the serial interface mode
selection.
When the V
CC
voltage rises above this critical threshold,
the converter creates an internal power-on-reset (POR)
signal with a duration of approximately 0.5ms. The POR
signal clears all internal registers. Following the POR
signal, the LTC2440 starts a normal conversion cycle and
follows the succession of states described above. The first
conversion result following POR is accurate within the
specifications of the device if the power supply voltage is
restored within the operating range (4.5V to 5.5V) before
the end of the POR time interval.
Reference Voltage Range
This converter accepts a truly differential external refer-
ence voltage. The absolute/common mode voltage speci-
fication for the REF
+
and REF
–
pins covers the entire range
from GND to V
CC
. For correct converter operation, the
REF
+
pin must always be more positive than the REF
–
pin.
The LTC2440 can accept a differential reference voltage
from 0.1V to V
CC
. The converter output noise is deter-
mined by the thermal noise of the front-end circuits, and
as such, its value in microvolts is nearly constant with
reference voltage. A decrease in reference voltage will not
significantly improve the converter’s effective resolution.
On the other hand, a reduced reference voltage will im-
prove the converter’s overall INL performance.
Input Voltage Range
The analog input is truly differential with an absolute/
common mode range for the IN
+
and IN
–
input pins
extending from GND – 0.3V to V
CC
+ 0.3V. Outside
these limits, the ESD protection devices begin to turn on
and the errors due to input leakage current increase
rapidly. Within these limits, the LTC2440 converts the
bipolar differential input signal, V
IN
= IN
+
– IN
–
, from
–FS = –0.5 V
REF
to +FS = 0.5 V
REF
where V
REF
=
相關PDF資料 |
PDF描述 |
|---|---|
| LTC2444 | 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution |
| LTC2444C | 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution |
| LTC2444CUHF | 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution |
| LTC2444I | 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution |
| LTC2444IUHF | 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2440IGN#PBF | 功能描述:IC ADC DIFFER 24-BIT HS 16-SSOP 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 |
| LTC2440IGN#PBF | 制造商:Linear Technology 功能描述:A/D Converter (A-D) IC 制造商:Linear Technology 功能描述:IC, ADC, 24BIT, 3.5KHZ, SSOP-16 |
| LTC2440IGN#TR | 功能描述:IC CONV A/D 24-BIT DIFF 16-SSOP 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 |
| LTC2440IGN#TRPBF | 功能描述:IC ADC DIFFER 24-BIT HS 16-SSOP 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 |
| LTC2440IGNPBF | 制造商:Linear Technology 功能描述:24-Bit Diff. ADC Speed/Resolution SSOP16 |
發(fā)布緊急采購，3分鐘左右您將得到回復。