參數(shù)資料
型號(hào)： LTC2259CUJ-16#TRPBF
廠(chǎng)商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： ADC
英文描述： PROPRIETARY METHOD ADC, PQCC40
封裝： 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40
文件頁(yè)數(shù)： 7/28頁(yè)
文件大?。?/td> 318K
代理商： LTC2259CUJ-16#TRPBF
15
225916f
LTC2259-16
APPLICATIONS INFORMATION
25Ω
200Ω
0.1μF
AIN
+
AIN
–
12pF
0.1μF
VCM
LTC2259-16
225916 F07
–
+
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
0.1μF
Figure 7. Front-End Circuit Using a High
Speed Differential Amplier
Amplier Circuits
Figure 7 shows the analog input being driven by a high
speed differential amplier. The output of the amplier is
AC-coupled to the A/D so the amplier’s output common
mode voltage can be optimally set to minimize distortion.
At very high frequencies an RF gain block will often have
lower distortion than a differential amplier. If the gain
block is single-ended, then a transformer circuit (Figures 4
to 6) should convert the signal to differential before driv-
ing the A/D.
Reference
The LTC2259-16 has an internal 1.25V voltage reference.
For a 2V input range using the internal reference, connect
SENSE to VDD. For a 1V input range using the internal
reference, connect SENSE to ground. For a 2V input range
with an external reference, apply a 1.25V reference voltage
to SENSE (Figure 9.)
The input range can be adjusted by applying a voltage to
SENSE that is between 0.625V and 1.30V. The input range
will then be 1.6 VSENSE.
The VREF, REFH and REFL pins should be bypassed as
shown in Figure 8. The 0.1μF capacitor between REFH
and REFL should be as close to the pins as possible (not
on the back side of the circuit board).
VREF
REFH
SENSE
TIE TO VDD FOR 2V RANGE;
TIE TO GND FOR 1V RANGE;
RANGE = 1.6 VSENSE FOR
0.65V < VSENSE < 1.300V
1.25V
REFL
0.1μF
2.2μF
INTERNAL ADC
HIGH REFERENCE
BUFFER
225916 F08
LTC2259-16
5Ω
0.8x
DIFF AMP
INTERNAL ADC
LOW REFERENCE
1.25V BANDGAP
REFERENCE
0.625V
RANGE
DETECT
AND
CONTROL
1μF
0.1μF
Figure 8. Reference Circuit
SENSE
1.25V
EXTERNAL
REFERENCE
1μF
VREF
225916 F09
LTC2259-16
Figure 9. Using an External 1.25V Reference
相關(guān)PDF資料
PDF描述
LTC2259IUJ-16#TRPBF PROPRIETARY METHOD ADC, PQCC40
LTC2259IUJ-12#TRPBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2259IUJ-12#PBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2259CUJ-12#TRPBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2259CUJ-12#PBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2259IUJ-12#PBF 功能描述:IC ADC 12-BIT 80MSPS 40-QFN RoHS:是 類(lèi)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:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類(lèi)型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類(lèi)型:1 個(gè)單端，雙極
LTC2259IUJ-12#TRPBF 功能描述:IC ADC 12BIT 80MSPS 40-QFN RoHS:是 類(lèi)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:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類(lèi)型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類(lèi)型:1 個(gè)單端，雙極
LTC2259IUJ-12-PBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:12-Bit, 125/105/80Msps Ultralow Power 1.8V ADCs
LTC2259IUJ-12-TRPBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:12-Bit, 125/105/80Msps Ultralow Power 1.8V ADCs
LTC2259IUJ-14 制造商:Linear Technology 功能描述:Single ADC Pipelined 80Msps 14-bit Parallel/LVDS 40-Pin QFN EP
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