LTC6945,LTC6946-x

Part No.:
LTC6945,LTC6946-x
Download:
Download
Description:
16-Bit, 20Msps Low Noise Dual ADC
File Size:
584 K
Page:
36 Pages
Logo:
Maker:
LINER [ LINEAR TECHNOLOGY ]
PCB Prototype

July 19, 2018:

LTM8001

LU4T041A1X

LX1681CDM

LX1990EVAL

LY2NCRAC220240

M295V200BB70N3T

M58BW032DB55T3T

M76DW63000A90ZT

M80056B-1

MABA-007949-CT65TB

MAX15002ATL+

MAX17017

PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
LTC2270
16-Bit, 20Msps
Low Noise Dual ADC
FEATURES
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DESCRIPTION
The LTC
®
2270 is a two-channel simultaneous sampling
16-bit A/D converter designed for digitizing high frequency,
wide dynamic range signals. It is perfect for demanding
applications with AC performance that includes 84.1dB
SNR and 99dB spurious free dynamic range (SFDR).
DC specs include ±1LSB INL (typ), ±0.2LSB DNL (typ)
and no missing codes over temperature. The transition
noise is 1.44LSB
RMS
.
The digital outputs can be either full rate CMOS, Double
Data Rate CMOS, or Double Data Rate LVDS. A separate
output power supply allows the CMOS output swing to
range from 1.2V to 1.8V.
The ENC
+
and ENC
inputs may be driven differentially
or single-ended with a sine wave, PECL, LVDS, TTL, or
CMOS inputs. An optional clock duty cycle stabilizer al-
lows high performance at full speed for a wide range of
clock duty cycles.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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Two-Channel Simultaneously Sampling ADC
84.1dB SNR (46μV
RMS
Input Referred Noise)
99dB SFDR
±2.3LSB INL(Max)
Low Power: 160mW Total, 80mW per Channel
Single 1.8V Supply
CMOS, DDR CMOS, or DDR LVDS Outputs
Selectable Input Ranges: 1V
P-P
to 2.1V
P-P
200MHz Full Power Bandwidth S/H
Shutdown and Nap Modes
Serial SPI Port for Configuration
Pin Compatible with
LTC2180: 16-Bit, 25Msps, 78mW
LTC2140-14: 14-Bit, 25Msps, 50mW
64-Lead (9mm
×
9mm) QFN Package
APPLICATIONS
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Low Power Instrumentation
Software Defined Radios
Portable Medical Imaging
Multi-Channel Data Acquisition
TYPICAL APPLICATION
1.8V
V
DD
1.8V
OV
DD
2.0
1.5
CH 1
ANALOG
INPUT
S/H
16-BIT
ADC CORE
D1_15
INL ERROR (LSB)
CMOS,
DDR CMOS
OR DDR LVDS
OUTPUTS
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
20MHz
CLOCK
CLOCK
CONTROL
2270 TA01
Integral Non-Linearity (INL)
D1_0
D2_15
CH 2
ANALOG
INPUT
S/H
16-BIT
ADC CORE
OUTPUT
DRIVERS
D2_0
0
16384
32768
49152
OUTPUT CODE
65536
2270 TA02
GND
OGND
2270f
1