LTC2314-14 Datasheet, PDF (1/20 Pages) Linear Technology – 14-Bit, 4.5Msps Serial Sampling ADC in TSOT

Features
n _{4.5Msps Throughput Rate}
n _{Guaranteed 14-Bit No Missing Codes}
n _{Internal Reference: 2.048V/4.096V Span}
n _{Low Noise: 77.5dB SNR}
n _{Low Power: 6.2mA at 4.5Msps and 5V}
n _{Dual Supply Range: 3V/5V operation}
n _{Sleep Mode with < 1µA Typical Supply Current}
n _{Nap Mode with Quick Wake-up < 1 conversion}
n _{Separate 1.8V to 5V Digital I/O Supply}
n _{High Speed SPI-Compatible Serial I/O}
n _{Guaranteed Operation from –40°C to 125°C}
n _{8-Lead TSOT-23 Package}
Applications
n _{Communication Systems}
n _{High Speed Data Acquisition}
n _{Handheld Terminal Interface}
n _{Medical Imaging}
n _{Uninterrupted Power Supplies}
n _{Battery Operated Systems}
n _Automotive
LTC2314-14
14-Bit, 4.5Msps Serial
Sampling ADC in TSOT
Description
The LTC^®2314-14 is a 14-bit, 4.5Msps, serial sampling A/D
converter that draws only 6.2mA from a wide range analog
supply adjustable from 2.7V to 5.25V. The LTC2314-14
contains an integrated bandgap and reference buffer which
provide a low cost, high performance (20ppm/°C max)
and space saving applications solution. The LTC2314-14
achieves outstanding AC performance of 77dB SINAD and
–85dB THD while sampling a 500kHz input frequency.
The extremely high sample rate-to-power ratio makes the
LTC2314-14 ideal for compact, low power, high speed
systems. The LTC2314-14 also provides both nap and
sleep modes for further optimization of the device power
within a system.
The LTC2314-14 has a high-speed SPI-compatible serial
interface that supports 1.8V, 2.5V, 3V and 5V logic. The
fast 4.5Msps throughput makes the LTC2314-14 ideally
suited for a wide variety of high speed applications.
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.
Typical Application
5V Supply, Internal Reference, 4.5Msps, 14-bit Sampling ADC
5V
2.2µF
2.2µF
LTC2314-14
V_DD
CS
REF SCK
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
ANALOG INPUT
0V TO 4.096V
GND SDO
A_IN OV_DD
DIGITAL OUTPUT SUPPLY
1.8V TO 5V
2.2µF
231414 TA01
f_S = 4.5Msps, f_IN = 500kHz 32k-pt FFT
0
V_DD = 5V
–20
SNR = 77.5dBFS
SINAD = 76.9dBFS
–40
THD = 84.9dB
SFDR = 88.1dB
–60
–80
–100
–120
–160
–140
0
250 500 750 1000 1250 1500 1750 2000 2250
FREQUENCY (kHz)
231414 TA01a
For more information www.linear.com/2314-14
231414f
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