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参数资料
| 型号： | LTC2263IUJ-14#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | PROPRIETARY METHOD ADC, QCC40 |
| 封装： | 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40 |
| 文件页数： | 13/32页 |
| 文件大小： | 1451K |
| 代理商： | LTC2263IUJ-14#PBF |
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20
22654314fb
LTC2265-14/
LTC2264-14/LTC2263-14
Reference
The LTC2265-14/LTC2264-14/LTC2263-14 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 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 reference is shared by both ADC channels, so it is
not possible to independently adjust the input range of
individual channels.
The VREF, REFH and REFL pins should be bypassed, as
shown in Figure 8. The 0.1F capacitor between REFH and
REFL should be as close to the pins as possible (not on
the backside of the circuit board).
APPLICATIONS INFORMATION
VREF
REFH
SENSE
TIE TO VDD FOR 2V RANGE;
TIE TO GND FOR 1V RANGE;
RANGE = 1.6 VSENSE FOR
0.625V < VSENSE < 1.300V
1.25V
REFL
0.1F
2.2F
INTERNAL ADC
HIGH REFERENCE
BUFFER
5
0.8x
DIFF AMP
INTERNAL ADC
LOW REFERENCE
1.25V BANDGAP
REFERENCE
0.625V
RANGE
DETECT
AND
CONTROL
1F
0.1F
LTC2265-14
226514 F08
Figure 8. Reference Circuit
SENSE
1.25V
EXTERNAL
REFERENCE
1F
VREF
226514 F09
LTC2265-14
Figure 9. Using an External 1.25V Reference
VDD
LTC2265-14
226514 F10
ENC–
ENC+
15k
VDD
DIFFERENTIAL
COMPARATOR
30k
Figure 10. Equivalent Encode Input Circuit
for Differential Encode Mode
Encode Input
The signal quality of the encode inputs strongly affects
the A/D noise performance. The encode inputs should
be treated as analog signals—do not route them next to
digital traces on the circuit board. There are two modes
of operation for the encode inputs: the differential encode
mode (Figure 10), and the single-ended encode mode
(Figure 11).
30k
ENC+
ENC–
226514 F11
0V
1.8V TO 3.3V
LTC2265-14
CMOS LOGIC
BUFFER
Figure 11. Equivalent Encode Input Circuit
for Single-Ended Encode Mode
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2264CUJ-14#PBF | PROPRIETARY METHOD ADC, QCC40 |
| LTC2265CUJ-14#TRPBF | PROPRIETARY METHOD ADC, QCC40 |
| LTC2265IUJ-14#PBF | PROPRIETARY METHOD ADC, QCC40 |
| LTC2265IUJ-12#PBF | PROPRIETARY METHOD ADC, QCC40 |
| LTC2265CUJ-12#TRPBF | PROPRIETARY METHOD ADC, QCC40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2263IUJ-14TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 65Msps/40Msps/25Msps Low Power Dual ADCs |
| LTC2264-12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:12-Bit, 65Msps/40Msps/25Msps Low Power Dual ADCs |
| LTC2264-14 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad 14-Bit, 125Msps ADC with Integrated Drivers |
| LTC2264CUJ-12#PBF | 功能描述:IC ADC 12BIT SER/PAR 40M 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 |
| LTC2264CUJ-12#TRPBF | 功能描述:IC ADC 12BIT SER/PAR 40M 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:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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