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LTC1745CFW#TRPBF

Description
1-Channel Single ADC Pipelined 25Msps 12-bit Parallel 48-Pin TSSOP T/R
File Size231KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC1745CFW#TRPBF Overview

1-Channel Single ADC Pipelined 25Msps 12-bit Parallel 48-Pin TSSOP T/R

LTC1745CFW#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Converter TypeGeneral Purpose
ArchitecturePipelined
Resolution12bit
Number of ADCs1
Number of Input Channels1
Sampling Rate25Msps
Digital Interface TypeParallel
Input TypeVoltage
Input Signal TypeSingle-Ended|Differential
Voltage ReferenceInternal|External
Polarity of Input VoltageBipolar
Voltage Supply SourceSingle
Input Voltage±1V/±1.6V
Minimum Single Supply Voltage (V)4.75
Typical Single Supply Voltage (V)5
Maximum Single Supply Voltage (V)5.25
Typical Power Dissipation (mW)380
Maximum Power Dissipation (mW)455
Integral Nonlinearity Error±1LSB
Full Scale Error2.5%FSR
Signal to Noise Ratio72.5dB(Typ)
No Missing Codes (bit)12
Sample and HoldYes
Single-Ended InputYes
Digital Supply SupportNo
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
PackagingTape and Reel
Supplier Temperature GradeCommercial
Pin Count48
Standard Package NameSOP
Supplier PackageTSSOP
MountingSurface Mount
Package Height0.95(Max)
Package Length12.6(Max)
Package Width6.2(Max)
PCB changed48
Lead ShapeGull-wing
LTC1745
Low Noise,12-Bit, 25Msps ADC
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Sample Rate: 25Msps
72.5dB SNR and 91dB SFDR (3.2V Range)
71dB SNR and 96dB SFDR (2V Range)
No Missing Codes
Single 5V Supply
Low Power Dissipation: 380mW
Selectable Input Ranges:
±1V
or
±1.6V
240MHz Full Power Bandwidth S/H
Pin Compatible Family
25 Msps: LTC1746 (14-Bit), LTC1745 (12-Bit)
50 Msps: LTC1744 (14-Bit), LTC1743 (12-Bit)
65 Msps: LTC1742 (14-Bit), LTC1741 (12-Bit)
80 Msps: LTC1748 (14-Bit), LTC1747 (12-Bit)
The LTC
®
1745 is a 25Msps, sampling 12-bit A/D con-
verter designed for digitizing high frequency, wide dy-
namic range signals. Pin selectable input ranges of
±1V
and
±1.6V
along with a resistor programmable mode
allow the LTC1745’s input range to be optimized for a wide
variety of applications.
The LTC1745 is perfect for demanding communications
applications with AC performance that includes 72.5dB
SNR and 91dB spurious free dynamic range. Ultralow jitter
of 0.3ps
RMS
allows undersampling with excellent noise
performance. DC specs include
±1LSB
INL maximum and
±0.75LSB
DNL over temperature.
The digital interface is compatible with 5V, 3V and 2V logic
systems. The ENC and ENC inputs may be driven differen-
tially 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 digital
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.
APPLICATIO S
s
s
s
s
s
s
Telecommunications
Medical Imaging
Receivers
Base Stations
Spectrum Analysis
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
BLOCK DIAGRA
A
IN
±1V
DIFFERENTIAL
ANALOG INPUT
+
25Msps, 12-Bit ADC with a
±1V
Differential Input Range
OV
DD
OF
D11
D0
CLKOUT
0.1µF
0.5V TO 5V
0.1µF
A
IN–
S/H
AMP
12-BIT
PIPELINED ADC
12
SENSE
BUFFER
RANGE
SELECT
DIFF AMP
GND
CONTROL LOGIC
1745 BD
V
CM
4.7µF
2.35V
REF
REFLB
0.1µF
1µF
REFHA
4.7µF
REFLA
REFHB
ENC
ENC
0.1µF
1µF
DIFFERENTIAL
ENCODE INPUT
U
OUTPUT
LATCHES
OGND
V
DD
1µF
1µF
1µF
5V
MSBINV
OE
W
U
1745f
1

LTC1745CFW#TRPBF Related Products

LTC1745CFW#TRPBF LTC1745CFW#PBF LTC1745IFW#PBF LTC1745IFW#TRPBF
Description 1-Channel Single ADC Pipelined 25Msps 12-bit Parallel 48-Pin TSSOP T/R 1-Channel Single ADC Pipelined 25Msps 12-bit Parallel 48-Pin TSSOP Tube 1-Channel Single ADC Pipelined 25Msps 12-bit Parallel 48-Pin TSSOP Tube 1-Channel Single ADC Pipelined 25Msps 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
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
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 25Msps 25Msps 25Msps 25Msps
Digital Interface Type Parallel Parallel Parallel Parallel
Input Type Voltage Voltage Voltage Voltage
Input Signal Type Single-Ended|Differential Single-Ended|Differential Single-Ended|Differential Single-Ended|Differential
Voltage Reference Internal|External Internal|External External|Internal Internal|External
Polarity of Input Voltage Bipolar Bipolar Bipolar Bipolar
Voltage Supply Source Single Single Single Single
Input Voltage ±1V/±1.6V ±1V/±1.6V ±1V/±1.6V ±1V/±1.6V
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) 380 380 380 380
Maximum Power Dissipation (mW) 455 455 455 455
Integral Nonlinearity Error ±1LSB ±1LSB ±1LSB ±1LSB
Full Scale Error 2.5%FSR 2.5%FSR 2.5%FSR 2.5%FSR
Signal to Noise Ratio 72.5dB(Typ) 72.5dB(Typ) 72.5dB(Typ) 72.5dB(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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