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LTC1744IFW Datasheet

  • LTC1744IFW

  • 14-Bit, 50Msps ADC

  • 24頁(yè)

  • LINER

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LTC1744
14-Bit, 50Msps ADC
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
Sample Rate: 50Msps
77dB SNR and 87dB SFDR (3.2V Range)
73.5dB SNR and 90dB SFDR (2V Range)
No Missing Codes
Single 5V Supply
Power Dissipation: 1.2W
Selectable Input Ranges:
鹵1V
or
鹵1.6V
150MHz 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
The LTC
廬
1744 is a 50Msps, sampling 14-bit A/D con-
verter designed for digitizing high frequency, wide dynamic
range signals. Pin selectable input ranges of
鹵1V
and
鹵1.6V
along with a resistor programmable mode allow the
LTC1744鈥檚 input range to be optimized for a wide variety
of applications.
The LTC1744 is perfect for demanding communications
applications with AC performance that includes 77dB
SNR and 87dB spurious free dynamic range. Ultralow jitter
of 0.3ps
RMS
allows undersampling of IF frequencies with
excellent noise performance. DC specs include
鹵4LSB
maximum INL and no missing codes 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 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.
APPLICATIO S
s
s
s
s
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Telecommunications
Receivers
Base Stations
Spectrum Analysis
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
BLOCK DIAGRA
A
IN+
鹵1V
DIFFERENTIAL
ANALOG INPUT
50Msps, 14-Bit ADC with a
鹵1V
Differential Input Range
OV
DD
0.1碌F
CORRECTION
LOGIC AND
SHIFT
REGISTER
14
OF
D13
D0
CLKOUT
0.5V TO 5V
0.1碌F
A
IN鈥?/div>
S/H
CIRCUIT
14-BIT
PIPELINED ADC
SENSE
BUFFER
RANGE
SELECT
DIFF AMP
GND
CONTROL LOGIC
1744 BD
V
CM
4.7碌F
2.5V
REF
REFLB
REFHA
4.7碌F
REFLA
REFHB ENC
ENC
0.1碌F
1碌F
0.1碌F
1碌F
DIFFERENTIAL
ENCODE INPUT
U
OUTPUT
LATCHES
鈥?/div>
鈥?/div>
鈥?/div>
OGND
V
DD
1碌F
1碌F
5V
1碌F
MSBINV
OE
W
U
1744f
1

LTC1744IFW 產(chǎn)品屬性

  • LTC1744

  • 39

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器

  • -

  • 14

  • 50M

  • 并聯(lián)

  • 1

  • 1.5W

  • 單電源

  • -40°C ~ 85°C

  • 表面貼裝

  • 48-TFSOP（0.240"，6.10mm 寬）

  • 48-TSSOP

  • 管件

  • 2 個(gè)單端，雙極；1 個(gè)差分，雙極

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