LTC1748 14-Bit, 80Msps Low Noise ADC

The LTC®1748 is an 80Msps, 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 LTC1748’s input range to be optimized for a wide variety of applications.

The LTC1748 is perfect for demanding communications applications with AC performance that includes 76.3dB 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 no missing codes.

The digital interface is compatible with 5V, 3V, 2V and LVDS 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 output power supply can be operated from 0.5V to 5V, making it easy to connect directly to any low voltage DSPs or FIFOs.

The TSSOP package with a flow-through pinout simplifies the board layout

产品特点 Features Sample Rate: 80Msps 76.3dB SNR and 90dB SFDR (3.2V Range) 72.6dB SNR and 90dB SFDR (2V Range) No Missing Codes Single 5V Supply Power Dissipation: 1.4W 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: 80Msps
76.3dB SNR and 90dB SFDR (3.2V Range)
72.6dB SNR and 90dB SFDR (2V Range)
No Missing Codes
Single 5V Supply
Power Dissipation: 1.4W
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

LTC1748 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) *
LTC1748CFW	TSSOP	48	C	$10.80	$9.30
LTC1748CFW#PBF	TSSOP	48	C	$10.80	$9.30
LTC1748CFW#TR	TSSOP	48	C		$9.40
LTC1748CFW#TRPBF	TSSOP	48	C		$9.40
LTC1748IFW	TSSOP	48	I	$12.70	$10.95
LTC1748IFW#PBF	TSSOP	48	I	$12.70	$10.95
LTC1748IFW#TR	TSSOP	48	I		$11.05
LTC1748IFW#TRPBF	TSSOP	48	I		$11.05

LTC1748 演示电路板

器件型号	描述
DC520B-A	LTC1748CFW \| 14-Bit / 80 Msps Low Noise ADC, Ain < 40MHz (requires DC718 controller)
DC520B-B	LTC1748CFW \| 14-Bit / 80 Msps Low Noise ADC, Ain > 40MHz (requires DC718 controller)
DC520B-D	LTC1746CFW \| 14-Bit / 25 Msps Low Noise ADC, Ain < 40MHz (requires DC718 control

LTC1748 Companion Boards

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

LTC1748 数据手册及相关资料下载

数据手册( 英文) : LTC1748 - 14-Bit, 80Msps Low Noise 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