LTC1749CFW#TRPBF datasheet, PDF

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LTC1749CFW#TRPBF: Description1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP T/R; File Size271KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC1749CFW#TRPBF Overview

1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP T/R

LTC1749CFW#TRPBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Converter Type	General Purpose
Architecture	Pipelined
Resolution	12bit
Number of ADCs	1
Number of Input Channels	1
Sampling Rate	80Msps
Digital Interface Type	Parallel
Input Type	Voltage
Input Signal Type	Differential\|Single-Ended
Voltage Reference	External\|Internal
Polarity of Input Voltage	Bipolar
Voltage Supply Source	Single
Input Voltage	±0.7V/±1.125V
Minimum Single Supply Voltage (V)	4.75
Typical Single Supply Voltage (V)	5
Maximum Single Supply Voltage (V)	5.25
Typical Power Dissipation (mW)	1450
Maximum Power Dissipation (mW)	1690
Integral Nonlinearity Error	±1.5LSB
Full Scale Error	3.5%FSR
Signal to Noise Ratio	71.8dB(Typ)
No Missing Codes (bit)	12
Sample and Hold	Yes
Single-Ended Input	Yes
Digital Supply Support	No
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Packaging	Tape and Reel
Supplier Temperature Grade	Commercial
Pin Count	48
Standard Package Name	SOP
Supplier Package	TSSOP
Mounting	Surface Mount
Package Height	0.95(Max)
Package Length	12.6(Max)
Package Width	6.2(Max)
PCB changed	48
Lead Shape	Gull-wing

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LTC1749

12-Bit, 80Msps

Wide Bandwidth ADC

DESCRIPTIO

The LTC

1749 is an 80Msps, 12-bit A/D converter de-

signed 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 0.15ps

RMS

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.

, LTC and LT are registered trademarks of Linear Technology Corporation.

FEATURES

Sample Rate: 80Msps

PGA Front End (2.25V

P-P

or 1.35V

P-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

APPLICATIO S

Direct IF Sampling

Telecommunications

Receivers

Cellular Base Stations

Spectrum Analysis

Communications Test Equipment

Undersampling

BLOCK DIAGRA

PGA

IN+

80Msps, 12-Bit ADC with a 2.25V Differential Input Range

0.1µF

S/H

CIRCUIT

12-BIT

PIPELINED ADC

CORRECTION

LOGIC AND

SHIFT

OUTPUT

LATCHES

•

D11

CLKOUT

0.5V TO 5V

0.1µF

±1.125V

DIFFERENTIAL

–

ANALOG INPUT A

SENSE

BUFFER

RANGE

SELECT

DIFF AMP

GND

CONTROL LOGIC

1749 BD

4.7µF

REF

REFLB

0.1µF

1µF

REFHA

4.7µF

REFLA

REFHB

0.1µF

ENC

1µF

DIFFERENTIAL

ENCODE INPUT

OGND

1µF

MSBINV

1749f

LTC1749CFW#TRPBF Related Products

	LTC1749CFW#TRPBF	LTC1749CFW#PBF	LTC1749IFW#PBF	LTC1749IFW#TRPBF
Description	1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP T/R	1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP Tube	1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP Tube	1-Channel Single ADC Pipelined 80Msps 12-bit Parallel 48-Pin TSSOP T/R
EU restricts the use of certain hazardous substances	Compliant	Compliant	Compliant	Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99
Part Status	Active	Active	Active	Active
Converter Type	General Purpose	General Purpose	General Purpose	General Purpose
Architecture	Pipelined	Pipelined	Pipelined	Pipelined
Resolution	12bit	12bit	12bit	12bit
Number of ADCs	1	1	1	1
Number of Input Channels	1	1	1	1
Sampling Rate	80Msps	80Msps	80Msps	80Msps
Digital Interface Type	Parallel	Parallel	Parallel	Parallel
Input Type	Voltage	Voltage	Voltage	Voltage
Input Signal Type	Differential\|Single-Ended	Single-Ended\|Differential	Single-Ended\|Differential	Single-Ended\|Differential
Voltage Reference	External\|Internal	Internal\|External	Internal\|External	Internal\|External
Polarity of Input Voltage	Bipolar	Bipolar	Bipolar	Bipolar
Voltage Supply Source	Single	Single	Single	Single
Input Voltage	±0.7V/±1.125V	±0.7V/±1.125V	±0.7V/±1.125V	±0.7V/±1.125V
Minimum Single Supply Voltage (V)	4.75	4.75	4.75	4.75
Typical Single Supply Voltage (V)	5	5	5	5
Maximum Single Supply Voltage (V)	5.25	5.25	5.25	5.25
Typical Power Dissipation (mW)	1450	1450	1450	1450
Maximum Power Dissipation (mW)	1690	1690	1690	1690
Integral Nonlinearity Error	±1.5LSB	±1.5LSB	±1.5LSB	±1.5LSB
Full Scale Error	3.5%FSR	3.5%FSR	3.5%FSR	3.5%FSR
Signal to Noise Ratio	71.8dB(Typ)	71.8dB(Typ)	71.8dB(Typ)	71.8dB(Typ)
No Missing Codes (bit)	12	12	12	12
Sample and Hold	Yes	Yes	Yes	Yes
Single-Ended Input	Yes	Yes	Yes	Yes
Digital Supply Support	No	No	No	No
Maximum Operating Temperature (°C)	70	70	85	85
Packaging	Tape and Reel	Tube	Tube	Tape and Reel
Supplier Temperature Grade	Commercial	Commercial	Industrial	Industrial
Pin Count	48	48	48	48
Standard Package Name	SOP	SOP	SOP	SOP
Supplier Package	TSSOP	TSSOP	TSSOP	TSSOP
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	0.95(Max)	0.95(Max)	0.95(Max)	0.95(Max)
Package Length	12.6(Max)	12.6(Max)	12.6(Max)	12.6(Max)
Package Width	6.2(Max)	6.2(Max)	6.2(Max)	6.2(Max)
PCB changed	48	48	48	48
Lead Shape	Gull-wing	Gull-wing	Gull-wing	Gull-wing

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