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参数资料
| 型号： | LTC2256IUJ-14#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| 封装： | 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40 |
| 文件页数： | 11/32页 |
| 文件大小： | 1546K |
| 代理商： | LTC2256IUJ-14#PBF |
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19
225814fa
LTC2258-14
LTC2257-14/LTC2256-14
APPLICATIONS INFORMATION
25Ω
200Ω
0.1μF
AIN
+
AIN
–
12pF
0.1μF
VCM
LTC2258-14
225814 F07
–
+
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
0.1μF
Figure 7. Front-End Circuit Using a High
Speed Differential Amplier
Reference
The LTC2258-14/2257-14/2256-14 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
225814 F08
LTC2258-14
Figure 8. Reference Circuit
SENSE
1.25V
EXTERNAL
REFERENCE
1μF
VREF
225814 F09
LTC2258-14
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).
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2257CUJ-14#PBF | 1-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| LTC2257IUJ-14#PBF | 1-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| LTC2259CUJ-16#PBF | PROPRIETARY METHOD ADC, PQCC40 |
| LTC2259IUJ-16#PBF | PROPRIETARY METHOD ADC, PQCC40 |
| LTC2259CUJ-16#TRPBF | PROPRIETARY METHOD ADC, PQCC40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2256IUJ-14-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs |
| LTC2256UJ-12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:12-Bit, 65/40/2 5Msps Ultralow Power 1.8V ADCs |
| LTC2256UJ-14 | 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs |
| LTC2257-12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:12-Bit, 65/40/2 5Msps Ultralow Power 1.8V ADCs |
| LTC2257-14 | 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs |
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