LTC1742 14-Bit, 65Msps Low Noise ADC

The LTC®1742 is an 65Msps, sampling 14-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 LTC1742’s input range to be optimized for a wide variety of applications.

The LTC1742 is perfect for demanding communications applications with AC performance that includes 76.5dB SNR and 90dB spurious free dynamic range. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±3LSB INL and ±1LSB DNL.

The digital interface is compatible with 5V, 3V, 2V and LVDS logic levels. 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 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: 65Msps 76.5dB SNR and 90dB SFDR (3.2V Range) 72.8dB SNR and 90dB SFDR (2V Range) No Missing Codes Single 5V Supply Power Dissipation: 1.275W Selectable Input Ranges: ±1V or ±1.6V 240MHz Full Power Bandwidth S/H Pin Compatible Family 25Msps: LTC1746 (14-Bit), LTC1745 (12-Bit) 50Msps: LTC1744 (14-Bit), LTC1743 (12-Bit) 65Msps: LTC1742 (14-Bit), LTC1741 (12-Bit) 80Msps: LTC1748 (14-Bit), LTC1747 (12-Bit) 48-Pin TSSOP Package 封装	应用 Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems 典型应用图

产品特点 Features

Sample Rate: 65Msps
76.5dB SNR and 90dB SFDR (3.2V Range)
72.8dB SNR and 90dB SFDR (2V Range)
No Missing Codes
Single 5V Supply
Power Dissipation: 1.275W
Selectable Input Ranges: ±1V or ±1.6V
240MHz Full Power Bandwidth S/H
Pin Compatible Family
25Msps: LTC1746 (14-Bit), LTC1745 (12-Bit)
50Msps: LTC1744 (14-Bit), LTC1743 (12-Bit)
65Msps: LTC1742 (14-Bit), LTC1741 (12-Bit)
80Msps: LTC1748 (14-Bit), LTC1747 (12-Bit)
48-Pin TSSOP Package

封装

应用

Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems

典型应用图

LTC1742 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) *
LTC1742CFW	TSSOP	48	C	$16.70	$12.75
LTC1742CFW#PBF	TSSOP	48	C	$16.70	$12.75
LTC1742CFW#TR	TSSOP	48	C	$32.25	$24.65
LTC1742CFW#TRPBF	TSSOP	48	C		$24.75
LTC1742IFW	TSSOP	48	I	$37.90	$29.00
LTC1742IFW#PBF	TSSOP	48	I	$37.90	$29.00
LTC1742IFW#TR	TSSOP	48	I		$29.10
LTC1742IFW#TRPBF	TSSOP	48	I		$29.10

LTC1742 演示电路板

器件型号	描述
DC520B-I	LTC1742CFW \| 12-Bit / 65 Msps Low Noise ADC, Ain < 40MHz (requires DC718 controller)
DC520B-J	LTC1742CFW \| 12-Bit / 65 Msps Low Noise ADC, Ain > 40MHz (requires DC718 controller)

LTC1742 Companion Boards

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

LTC1742 数据手册及相关资料下载

数据手册 : LTC1742 - 14-Bit, 65Msps Low Noise ADC .PDF
应用指南 : AN71 - The Care and Feeding of High Performance ADCs.PDF
可靠性数据 : R380 Reliability Data .PDF
产品选型卡 : Differential Amplifiers/High Speed ADC Drivers .PDF
LT Journal: Jun 1999 A Clean 12-Bit, 10Msps ADC..PDF