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參數(shù)資料
| 型號： | THS1240C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 1-CH 12-BIT DELTA-SIGMA ADC, PARALLEL ACCESS, PQFP48 |
| 封裝： | POWER, PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 18/19頁 |
| 文件大?。?/td> | 424K |
| 代理商： | THS1240C |
THS1240
12-BIT 40 MSPS IF SAMPLING COMMUNICATIONS
ANALOG-TO-DIGITAL CONVERTER
SLAS279A – JUNE 2000 – REVISED AUGUST 2000
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
using the THS1240 references
The option of internal or external reference is provided by allowing for an external connection of the internal
reference to the reference inputs. This type of reference selection offers the lowest noise possible by not relying
on any active switch to make the selection. Compensating each reference output with a 1-
F and 0.01-F chip
capacitor is required as shown in Figure 6. The differential analog input range is equal to 2 (VREFOUT+ –
VREFOUT–). When using external references, it is best to decouple the reference inputs with a 0.1-F and
0.01-
F chip capacitor as shown in Figure 7.
0.01
F
1
F
0.01
F
1
F
VREFIN+
VREFOUT+
VREFIN–
VREFOUT–
Figure 6. Internal Reference Usage
Figure 7. External Reference Usage
0.01
F
0.1
F
0.01
F
0.1
F
External Reference +
VREFIN+
VREFIN–
External Reference –
using the THS1240 clock input
The THS1240 clock input can be driven with either a differential clock signal or a single ended clock input with
little or no difference in performance between the single-ended and differential-input configurations. The
common mode of the clock inputs is set internally to VDD/2 using 5-k resistors (Figure 4).
The THS1240 clock input requires a common mode voltage or dc component of VDD/2. It is possible for the
common mode voltage of the clock source to differ from VDD/2 by as much as 10% with little or no performance
degradation. The clock input should be either a sinewave or a square wave having a 50% duty cycle.
When driven with a single-ended CMOS clock input, it is best to connect the CLK– input to ground with a 0.01
F
capacitor (see Figure 8).
CLK+
THS1240
CLK–
Square Wave or Sine Wave
2 V p-p to 5 V p-p
Common Mode Voltage = VDD/2
0.01
F
Figure 8. Driving the Clock From a Single-Ended Clock Source
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| THS1240CPHP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| THS1240IPHP | 功能描述:IC 12 BIT ADC 40 MSPS 48-HTQFP 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 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 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| THS125 | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:HIGH STABILITY MOTOR CONTROL. DIGITAL TACHOMETER. CRANK SHAFT POSITION SENSOR. |
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| THS126(F) | 制造商:Toshiba 功能描述:Cut Tape |
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