LTC1749 12-Bit, 80Msps Wide Bandwidth ADC

The LTC®1749 is an 80Msps, 12-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.

The LTC1749 has a highly linear sample-and-hold circuit with a bandwidth of 500MHz. The SFDR is 80dB with an input frequency of 250MHz. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with minimal degradation in SNR. DC specs include ±1LSB 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 low voltage DSPs or FIFOs.

The 48-pin TSSOP package with a flow-through pinout simplifies the board layout

产品特点 Features Sample Rate: 80Msps PGA Front End (2.25VP-P or 1.35VP-P Input Range) 71.8dB SNR and 87dB SFDR (PGA = 0) 70.2dB SNR and 87dB SFDR (PGA = 1) 500MHz Full Power Bandwidth S/H No Missing Codes Single 5V Supply Power Dissipation: 1.45W Two Pin Selectable Reference Values Data Ready Output Clock Pin Compatible 14-Bit 80Msps Device (LTC1750) 48-Pin TSSOP Package 封装	应用 Direct IF Sampling Telecommunications Receivers Cellular Base Stations Spectrum Analysis Communications Test Equipment Undersampling 典型应用图

LTC1749 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) *
LTC1749CFW	TSSOP	48	C	$10.80	$9.30
LTC1749CFW#PBF	TSSOP	48	C	$10.80	$9.30
LTC1749CFW#TR	TSSOP	48	C		$9.40
LTC1749CFW#TRPBF	TSSOP	48	C		$9.40
LTC1749IFW	TSSOP	48	I	$12.70	$10.95
LTC1749IFW#PBF	TSSOP	48	I	$12.70	$10.95
LTC1749IFW#TR	TSSOP	48	I		$11.05
LTC1749IFW#TRPBF	TSSOP	48	I		$11.05

LTC1749 演示电路板

器件型号	描述
DC699A-A	LTC1749CFW Demoboard \| 12-Bit 80MSPS ADC, Requires DC718

LTC1749 Companion Boards

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

LTC1749 数据手册及相关资料下载

数据手册( 英文) : LTC1749 - 12-Bit, 80Msps Wide Bandwidth 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