LTC2314-14_15 Datasheet, PDF (1/22 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
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.
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.
Complete 14-/12-Bit Pin-Compatible SAR ADC Family
500ksps 2.5Msps 4.5Msps
5Msps
14-Bit
LTC2312-14 LTC2313-14 LTC2314-14
12-Bit
LTC2312-12 LTC2313-12
LTC2315-12
Power 3V/5V 9mW/15mW 14mW/25mW 18mW/31mW 19mW/32mW
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
32k Point FFT, f_S = 4.5Msps, f_IN = 500kHz
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/LTC2314-14
231414fa
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