LTC1747 Linear Technology, LTC1747 Datasheet

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LTC1747

Manufacturer Part Number
LTC1747
Description
12-Bit 80Msps Low Noise ADC
Manufacturer
Linear Technology
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1747CFW
Manufacturer:
LT
Quantity:
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Part Number:
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Manufacturer:
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FEATURES
BLOCK DIAGRA
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
Sample Rate: 80Msps
72dB SNR and 85dB SFDR (3.2V Range)
70.5dB SNR and 87dB SFDR (2V Range)
Pin Compatible with 14-Bit 80Msps LTC1748
No Missing Codes
Single 5V Supply
Power Dissipation: 1.4W
Selectable Input Ranges: 1V or 1.6V
240MHz 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
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ANALOG INPUT
DIFFERENTIAL
4.7 F
1V
SENSE
U
A
A
V
IN
IN
CM
+
2.35V
SELECT
RANGE
W
REF
BUFFER
80Msps, 12-Bit ADC with a 2V Differential Input Range
AMP
S/H
DIFF AMP
0.1 F
REFLB
1 F
PIPELINED ADC
12-BIT
12-Bit, 80Msps Low Noise ADC
REFHA
DESCRIPTIO
The LTC
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 LTC1747’s input range to be optimized for a wide
variety of applications.
The LTC1747 is perfect for demanding communications
applications with AC performance that includes 72dB
SNR and 85dB spurious free dynamic range. Ultralow jitter
of 0.15ps
excellent noise performance. DC specs include 1.5 LSB
INL and 0.8LSB DNL over temperature.
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 any low voltage
DSPs or FIFOs.
The TSSOP package with a flow-through pinout simplifies
the board layout.
4.7 F
REFLA
1 F
®
0.1 F
RMS
1747 is an 80Msps, sampling 12-bit A/D con-
REFHB
ENCODE INPUT
DIFFERENTIAL
allows undersampling of IF frequencies with
CORRECTION
LOGIC AND
REGISTER
ENC
SHIFT
CONTROL LOGIC
ENC
U
12
MSBINV
LATCHES
OUTPUT
OE
GND
OV
OGND
V
1747 BD
www.DataSheet4U.com
DD
DD
OF
D11
D0
CLKOUT
0.1 F
1 F
1 F
0.1 F
LTC1747
1 F
0.5V
TO 5V
5V
1747fa
1

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