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LTC1749 - LTC1749是12-Bit, 80Msps Wide Bandwidth ADC

LTC1749是LINEAR凌力尔特公司的一款高速 ADC产品，LTC1749是LTC1749是12-Bit, 80Msps Wide Bandwidth ADC，本站介绍了LTC1749的封装应用图解、特点和优点、功能等，并给出了与LTC1749相关的LINEAR元器件型号供参考。

LTC1749 - LTC1749是12-Bit, 80Msps Wide Bandwidth ADC - 高速 ADC - 数据转换 - 凌力尔特

LTC1749 - 12-Bit, 80Msps Wide Bandwidth ADC

LTC1749 - 12-Bit, 80Msps Wide Bandwidth ADC - Linear Technology（凌力尔特）

功能描述

The LTC1749 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.

特点

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

应用

Direct IF Sampling

Telecommunications

Receivers

Cellular Base Stations

Spectrum Analysis

Communications Test Equipment

Undersampling

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1749CFW	TSSOP-48	C	$25.55	$19.55
LTC1749CFW#PBF	TSSOP-48	C	$25.55	$19.55
LTC1749CFW#TR	TSSOP-48	C		$19.65
LTC1749CFW#TRPBF	TSSOP-48	C		$19.65
LTC1749IFW	TSSOP-48	I	$30.10	$23.00
LTC1749IFW#PBF	TSSOP-48	I	$30.10	$23.00
LTC1749IFW#TR	TSSOP-48	I		$23.10
LTC1749IFW#TRPBF	TSSOP-48	I		$23.10

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