LTC2313-14_15 Datasheet, PDF (1/22 Pages) Linear Technology – 14-Bit, 2.5Msps Serial Sampling ADC in TSOT

LTC2313-14
14-Bit, 2.5Msps Serial
Sampling ADC in TSOT
Features
n _{2.5Msps Throughput Rate}
n _{No Cycle Latency}
n _{Guaranteed 14-Bit No Missing Codes}
n _{Single 3V or 5V Supply}
n _{Low Noise: 77.5dB SNR}
n _{Low Power: 14mW at 2.5Msps and 3V Supply}
n _{Low Drift (20ppm/°C Maximum) 2.048V or 4.096V}
Internal Reference
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.
Description
The LTC^®2313-14 is a 14-bit, 2.5Msps, serial sampling
A/D converter that draws only 5mA from a single 3V or
5V supply. The LTC2313-14 contains an integrated low
drift reference and reference buffer providing a low cost,
high performance (20ppm/°C maximum) and space
saving solution. The LTC2313-14 achieves outstanding
AC performance of 77dB SINAD and –85dB THD while
sampling at 2.5Msps. The extremely high sample rate-to-
power ratio makes the LTC2313-14 ideal for compact, low
power, high speed systems. The supply current decreases
at lower sampling rates as the device automatically enters
nap mode after conversions.
The LTC2313-14 has a high speed SPI-compatible serial
interface that supports 1.8V, 2.5V, 3V and 5V logic. The
fast 2.5Msps throughput with no cycle latency makes
the LTC2313-14 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, 2.5Msps, 14-bit Sampling ADC
5V
2.2µF
2.2µF
LTC2313-14
V_DD CONV
REF SCK
ANALOG INPUT
0V TO 4.096V
GND SDO
A_IN OV_DD
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
DIGITAL OUTPUT SUPPLY
1.8V TO 5V
2.2µF
16k Point FFT, f_S = 2.5Msps, f_IN = 497kHz
0
V_DD = 5V
–20
SNR = 77.5dBFS
SINAD = 77dBFS
–40
THD = –85dB
SFDR = 87dB
–60
–80
–100
–120
–140
231314 TA01
–160
0
250
500
750 1000
INPUT FREQUENCY (kHz)
231314 TA01b
231314fb
For more information www.linear.com/LTC2313-14
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