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参数资料
型号： LTC2145IUP-14#PBF
厂商： Linear Technology
文件页数： 35/38页
文件大小： 0K
描述： IC ADC DUAL 14BIT 125MSPS 64-QFN
标准包装： 40
位数： 14
采样率（每秒）： 125M
数据接口： 并联，串行，SPI
转换器数目： 2
功率耗散（最大）： 360mW
电压电源： 模拟和数字
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 64-WFQFN 裸露焊盘
供应商设备封装： 64-QFN（9x9）
包装： 管件
输入数目和类型： 2 个差分
配用： DC890B-ND - BOARD USB DATA COLLECTION
LTC2145-14/
LTC2144-14/LTC2143-14
6
21454314fa
DIGITAL INPUTS AND OUTPUTS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ENCODE INPUTS (ENC+, ENC–)
Differential Encode Mode (ENC– Not Tied to GND)
VID
Differential Input Voltage
(Note 8)
l
0.2
V
VICM
Common Mode Input Voltage
Internally Set
Externally Set (Note 8)
l
1.1
1.2
1.6
V
VIN
Input Voltage Range
ENC+, ENC– to GND
l
0.2
3.6
V
RIN
Input Resistance
(See Figure 10)
10
kΩ
CIN
Input Capacitance
(Note 8)
3.5
pF
Single-Ended Encode Mode (ENC– Tied to GND)
VIH
High Level Input Voltage
VDD = 1.8V
l
1.2
V
VIL
Low Level Input Voltage
VDD = 1.8V
l
0.6
V
VIN
Input Voltage Range
ENC+ to GND
l
0
3.6
V
RIN
Input Resistance
(See Figure 11)
30
kΩ
CIN
Input Capacitance
(Note 8)
3.5
pF
DIGITAL INPUTS (CS, SDI, SCK in Serial or Parallel Programming Mode. SDO in Parallel Programming Mode)
VIH
High Level Input Voltage
VDD = 1.8V
l
1.3
V
VIL
Low Level Input Voltage
VDD = 1.8V
l
0.6
V
IIN
Input Current
VIN = 0V to 3.6V
l
–10
10
μA
CIN
Input Capacitance
(Note 8)
3
pF
SDO OUTPUT (Serial Programming Mode. Open-Drain Output. Requires 2kΩ Pull-Up Resistor if SDO is Used)
ROL
Logic Low Output Resistance to GND
VDD = 1.8V, SDO = 0V
200
Ω
IOH
Logic High Output Leakage Current
SDO = 0V to 3.6V
l
–10
10
μA
COUT
Output Capacitance
(Note 8)
3
pF
DIGITAL DATA OUTPUTS (CMOS MODES: FULL DATA RATE AND DOUBLE DATA RATE)
OVDD = 1.8V
VOH
High Level Output Voltage
IO = –500μA
l
1.750
1.790
V
VOL
Low Level Output Voltage
IO = 500μA
l
0.010
0.050
V
OVDD = 1.5V
VOH
High Level Output Voltage
IO = –500μA
1.488
V
VOL
Low Level Output Voltage
IO = 500μA
0.010
V
OVDD = 1.2V
VOH
High Level Output Voltage
IO = –500μA
1.185
V
VOL
Low Level Output Voltage
IO = 500μA
0.010
V
DIGITAL DATA OUTPUTS (LVDS MODE)
VOD
Differential Output Voltage
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
l
247
350
175
454
mV
VOS
Common Mode Output Voltage
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
l
1.125
1.250
1.375
V
RTERM
On-Chip Termination Resistance
Termination Enabled, OVDD = 1.8V
100
Ω
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