LTC2158-12 Datasheet, PDF (1/28 Pages) Linear Dimensions Semiconductor – Dual 12-Bit 310Msps ADC

Features
n _{67.6dBFS SNR}
n _{88dB SFDR}
n _{Low Power: 688mW Total}
n _{Single 1.8V Supply}
n _{DDR LVDS Outputs}
n _{1.32VP-P Input Range}
n _{1.25GHz Full Power Bandwidth S/H}
n _{Optional Clock Duty Cycle Stabilizer}
n _{Low Power Sleep and Nap Modes}
n _{Serial SPI Port for Configuration}
n _{Pin-Compatible 14-Bit Versions}
n _{64-Lead (9mm × 9mm) QFN Package}
Applications
n _{Communications}
n _{Cellular Basestations}
n _{Software Defined Radios}
n _{Medical Imaging}
n _{High Definition Video}
n _{Testing and Measurement Instruments}
LTC2158-12
Dual 12-Bit 310Msps ADC
Description
The LTC^®2158-12 is a 2-channel simultaneous sampling
310Msps 12-bit A/D converter designed for digitizing high
frequency, wide dynamic range signals. It is perfect for
demanding communications applications with AC per-
formance that includes 67.6dB SNR and 88dB spurious
free dynamic range (SFDR). The 1.25GHz input bandwidth
allows the ADC to undersample high frequencies with
good performance. The latency is only five clock cycles.
DC specs include ±0.6LSB INL (typ), ±0.1LSB DNL (typ)
and no missing codes over temperature. The transition
noise is 0.6LSB_RMS.
The digital outputs are double data rate (DDR) LVDS.
The ENC⁺ and ENC^– inputs can be driven differentially with
a sine wave, PECL, LVDS, TTL, or CMOS inputs. An optional
clock duty cycle stabilizer allows 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.
Typical Application
ANALOG
INPUT
S/H
V_DD
CHANNEL A
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK
CLOCK/DUTY
CYCLE
CONTROL
ANALOG
INPUT
S/H
CHANNEL B
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
GND
OUTPUT
DRIVERS
OV_DD
DA10_11
•
•
•
DA0_1
DDR
LVDS
OGND
OV_DD
OUTPUT
DRIVERS
DB10_11
•
•
•
DB0_1
DDR
LVDS
215812 TA01
OGND
LTC2158-12 32K Point 2-Tone FFT,
f_IN = 71MHz and 69MHz, 310Msps
0
–20
–40
–60
–80
–100
–120
0 20 40 60 80 100 120 140
FREQUENCY (MHz)
215812 TA10b
215812f
1