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参数资料
| 型号： | LTC2262CUJ-12#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| 封装： | 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40 |
| 文件页数： | 7/28页 |
| 文件大小： | 481K |
| 代理商： | LTC2262CUJ-12#PBF |
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LTC2262-12
15
226212fa
APPLICATIONS INFORMATION
25Ω
200Ω
0.1μF
AIN
+
AIN
–
12pF
0.1μF
VCM
LTC2262-12
226212 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 LTC2262-12 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 external
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.
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
5Ω
0.8x
DIFF AMP
INTERNAL ADC
LOW REFERENCE
1.25V BANDGAP
REFERENCE
0.625V
RANGE
DETECT
AND
CONTROL
1μF
0.1μF
LTC2262-12
226212 F08
Figure 8. Reference Circuit
SENSE
1.25V
EXTERNAL
REFERENCE
1μF
VREF
226212 F09
LTC2262-12
Figure 9. Using an External 1.25V Reference
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).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2262CUJ-14#PBF | 制造商:Linear Technology 功能描述:ADC Single Pipelined 150Msps 14-bit Parallel/LVDS 40-Pin QFN EP 制造商:Linear Technology 功能描述:Single ADC Pipelined 150Msps 14-bit Parallel/LVDS 40-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 14BIT 150MSPS 40-QFN 制造商:Linear Technology 功能描述:IC ADC 14BIT 150MSPS QFN-40 制造商:Linear Technology 功能描述:MS-ADC/High Speed, 14-bit, 150Msps, 1.8V Low-Power ADC 制造商:Linear Technology 功能描述:IC, ADC, 14BIT, 150MSPS, QFN-40, Resolution (Bits):14bit, Sampling Rate:150MSPS, Supply Voltage Type:Single, Supply Voltage Min:1.7V, Supply Voltage Max:1.9V, Supply Current:82.7mA, Digital IC Case Style:QFN, No. of Pins:40 , RoHS Compliant: Yes |
| LTC2262CUJ-14#TRPBF | 功能描述:IC ADC 14BIT 150MSPS 40-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2262IUJ-12#PBF | 功能描述:IC ADC 12BIT 150MSPS 40-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2262IUJ-12#TRPBF | 功能描述:IC ADC 12BIT 150MSPS 40-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2262IUJ-14#PBF | 制造商:Linear Technology 功能描述:ADC Single Pipelined 150Msps 14-bit Parallel/LVDS 40-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 14BIT 1.8V 150MSPS 40-QFN |
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