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參數資料
| 型號： | LTC2268CUJ-14#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數： | 8/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 125MSPS DUAL 40QFN |
| 標準包裝： | 2,000 |
| 位數： | 14 |
| 采樣率（每秒）： | 125M |
| 數據接口： | Serial LVDS |
| 轉換器數目： | 2 |
| 功率耗散（最大）： | 364mW |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 40-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 40-QFN（6x6） |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 2 Differential; 2 Single-Ended |
| 配用： | DC1371A-ND - BOARD USB DATA ACQUISITION HS |
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LTC2268-14/
LTC2267-14/LTC2266-14
16
22687614fa
pin FuncTions
AIN1+ (Pin 1): Channel 1 Positive Differential Analog Input.
AIN1–(Pin2):Channel1NegativeDifferentialAnalogInput.
VCM1(Pin3):CommonModeBiasOutput,NominallyEqual
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channel 1. Bypass to ground with
a 0.1F ceramic capacitor.
REFH (Pins 4,5): ADC High Reference. Bypass to pins 6, 7
with a 2.2F ceramic capacitor and to ground with a 0.1F
ceramic capacitor.
REFL (Pins 6,7): ADC Low Reference. Bypass to pins 4, 5
with a 2.2F ceramic capacitor and to ground with a 0.1F
ceramic capacitor.
VCM2(Pin8):CommonModeBiasOutput,NominallyEqual
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channel 2. Bypass to ground with
a 0.1F ceramic capacitor.
AIN2+ (Pin 9): Channel 2 Positive Differential Analog
Input.
AIN2– (Pin 10): Channel 2 Negative Differential Analog
Input.
VDD (Pins 11, 12, 39, 40): 1.8V Analog Power Supply.
Bypass to ground with 0.1F ceramic capacitors. Adjacent
pins can share a bypass capacitor.
ENC+ (Pin 13): Encode Input. Conversion starts on the
rising edge.
ENC– (Pin 14): Encode Complement Input. Conversion
starts on the falling edge.
CS(Pin15):Inserialprogrammingmode,(PAR/SER=0V),
CS is the serial interface chip select input. When CS is low,
SCKisenabledforshiftingdataonSDIintothemodecontrol
registers. In the parallel programming mode (PAR/SER =
VDD), CS selects 2-lane or 1-lane output mode. CS can
be driven with 1.8V to 3.3V logic.
SCK (Pin 16): In serial programming mode, (PAR/SER =
0V), SCK is the serial interface clock input. In the parallel
programming mode (PAR/SER= VDD), SCK selects 3.5mA
or 1.75mA LVDS output currents. SCK can be driven with
1.8V to 3.3V logic.
SDI (Pin 17): In serial programming mode, (PAR/SER =
0V), SDI is the serial interface data input. Data on SDI is
clocked into the mode control registers on the rising edge
of SCK. In the parallel programming mode (PAR/SER =
VDD), SDI can be used to power down the part. SDI can
be driven with 1.8V to 3.3V logic.
GND (Pins 18, 33, 37, Exposed Pad Pin 41): ADC Power
Ground. The exposed pad must be soldered to the PCB
ground.
OGND (Pin 25): Output Driver Ground. Must be shorted
to the ground plane by a very low inductance path. Use
multiple vias close to the pin.
OVDD (Pin 26): Output Driver Supply. Bypass to ground
with a 0.1F ceramic capacitor.
SDO (Pin 34): In serial programming mode, (PAR/SER
= 0V), SDO is the optional serial interface data output.
Data on SDO is read back from the mode control registers
and can be latched on the falling edge of SCK. SDO is an
open-drain NMOS output that requires an external 2k
pull-up resistor to 1.8V – 3.3V. If read back from the mode
control registers is not needed, the pull-up resistor is not
necessary and SDO can be left unconnected. In the parallel
programmingmode(PAR/SER=VDD),SDOisaninputthat
enables internal 100Ω termination resistors on the digital
outputs. When used as an input, SDO can be driven with
1.8V to 3.3V logic through a 1k series resistor.
PAR/SER (Pin 35): Programming Mode Selection Pin.
Connecttogroundtoenabletheserialprogrammingmode.
CS, SCK, SDI, SDO become a serial interface that control
the A/D operating modes. Connect to VDD to enable the
parallel programming mode where CS, SCK, SDI, SDO
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相關代理商/技術參數 |
參數描述 |
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| LTC2268IUJ-12#PBF | 功能描述:IC ADC 12BIT SER 125MSPS 40-QFN RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
| LTC2268IUJ-12#PBF | 制造商:Linear Technology 功能描述:IC ADC 12BIT 125MSPS QFN-40 |
| LTC2268IUJ-12#TRPBF | 功能描述:IC ADC 12BIT 125MSPS DUAL 40QFN RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
| LTC2268IUJ-12PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 125Msps/105Msps/ 80Msps Low Power Dual ADCs |
| LTC2268IUJ-12TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 125Msps/105Msps/ 80Msps Low Power Dual ADCs |
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