LTC1745 Low Noise,12-Bit, 25Msps ADC

The LTC®1745 is a 25Msps, sampling 12-bit A/D converter designed for digitizing high frequency, wide dynamic 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 differentially 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.

产品特点 Features Sample Rate: 25Msps 72.5dB SNR and 96dB SFDR (3.2V Range) 71dB SNR and 96dB SFDR (2V Range) No Missing Codes Single 5V Supply Low Power Dissipation: 380mW Selectable Input Ranges: ±1V or ±1.6V 240MHz Full Power Bandwidth S/H 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) 封装	应用 Telecommunications Medical Imaging Receivers Cellular Base Stations Spectrum Analysis Imaging Systems 典型应用图

产品特点 Features

Sample Rate: 25Msps
72.5dB SNR and 96dB SFDR (3.2V Range)
71dB SNR and 96dB SFDR (2V Range)
No Missing Codes
Single 5V Supply
Low Power Dissipation: 380mW
Selectable Input Ranges: ±1V or ±1.6V
240MHz Full Power Bandwidth S/H
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)

封装

应用

Telecommunications
Medical Imaging
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems

典型应用图

LTC1745 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1745CFW	TSSOP	48	C	$10.80	$9.30
LTC1745CFW#PBF	TSSOP	48	C	$10.80	$9.30
LTC1745CFW#TR	TSSOP	48	C		$9.40
LTC1745CFW#TRPBF	TSSOP	48	C		$9.40
LTC1745IFW	TSSOP	48	I	$12.70	$10.95
LTC1745IFW#PBF	TSSOP	48	I	$12.70	$10.95
LTC1745IFW#TR	TSSOP	48	I		$11.05
LTC1745IFW#TRPBF	TSSOP	48	I		$11.05

LTC1745 演示电路板

器件型号	描述
DC345B	LTC1745CFW \| 14-Bit, 50Msps ADC (requires DC718 controller)

LTC1745 Companion Boards

器件型号	描述
DC718C	USB Data Acquisition Controller, for QuikEval -II Evaluation Kits

LTC1745 数据手册及相关资料下载

数据手册( 英文) : LTC1745 - Low Noise,12-Bit, 25Msps ADC .PDF
可靠性数据 : R479 Reliability Data .PDF
产品选型卡 : Differential Amplifiers/High Speed ADC Drivers .PDF
LT Journal: Dec 2002 A 14-Bit ADC that is Both Fast and Low Noise.PDF