參數(shù)資料
型號: LTC1745IFW#TRPBF
廠商: Linear Technology
文件頁數(shù): 1/20頁
文件大?。?/td> 0K
描述: IC ADC 12BIT 25MSPS LN 48TSSOP
標準包裝: 1,800
位數(shù): 12
采樣率(每秒): 25M
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 455mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-TFSOP(0.240",6.10mm 寬)
供應(yīng)商設(shè)備封裝: 48-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 2 個單端,雙極;1 個差分,雙極
1
LTC1745
1745f
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
BLOCK DIAGRA
W
Low Noise,12-Bit, 25Msps ADC
s
Sample Rate: 25Msps
s
72.5dB SNR and 91dB SFDR (3.2V Range)
s
71dB SNR and 96dB SFDR (2V Range)
s
No Missing Codes
s
Single 5V Supply
s
Low Power Dissipation: 380mW
s
Selectable Input Ranges:
±1V or ±1.6V
s
240MHz Full Power Bandwidth S/H
s
Pin Compatible Family
25 Msps: LTC1746 (14-Bit), LTC1745 (12-Bit)
50 Msps: LTC1744 (14-Bit), LTC1743 (12-Bit)
65 Msps: LTC1742 (14-Bit), LTC1741 (12-Bit)
80 Msps: LTC1748 (14-Bit), LTC1747 (12-Bit)
s
Telecommunications
s
Medical Imaging
s
Receivers
s
Base Stations
s
Spectrum Analysis
s
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LTC
1745 is a 25Msps, sampling 12-bit A/D con-
verter designed for digitizing high frequency, wide dy-
namic range signals. Pin selectable input ranges of
±1V
and
±1.6V along with a resistor programmable mode
allow the LTC1745’s input range to be optimized for a wide
variety of applications.
The LTC1745 is perfect for demanding communications
applications with AC performance that includes 72.5dB
SNR and 91dB spurious free dynamic range. Ultralow jitter
of 0.3psRMS allows undersampling with excellent noise
performance. DC specs include
±1LSB INL maximum and
±0.75LSB DNL over temperature.
The digital interface is compatible with 5V, 3V and 2V logic
systems. The ENC and ENC inputs may be driven differen-
tially from PECL, GTL and other low swing logic families or
from single-ended TTL or CMOS. The low noise, high gain
ENC and ENC inputs may also be driven by a sinusoidal
signal without degrading performance. A separate digital
output power supply can be operated from 0.5V to 5V,
making it easy to connect directly to low voltage DSPs
or FIFOs.
The TSSOP package with a flow-through pinout simplifies
the board layout.
25Msps, 12-Bit ADC with a
±1V Differential Input Range
12-BIT
PIPELINED ADC
12
S/H
AMP
±1V
DIFFERENTIAL
ANALOG INPUT
AIN
+
AIN
SENSE
VCM
4.7
F
DIFF AMP
REFLA
REFHB
GND
1745 BD
ENC
4.7
F
1
F1F
0.1
F
0.1
F
REFHA
REFLB
BUFFER
RANGE
SELECT
2.35VREF
OUTPUT
LATCHES
CONTROL LOGIC
OVDD
VDD
OGND
0.5V TO 5V
5V
0.1
F
1
F
1
F
1
F
D11
D0
CLKOUT
OF
ENC
DIFFERENTIAL
ENCODE INPUT
OE
MSBINV
0.1
F
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LTC1746IFW 制造商:Linear Technology 功能描述:ADC Single Pipelined 25Msps 14-bit Parallel 48-Pin TSSOP