1

215812fa

LTC2158-12

For more information www.linear.com/LTC2158-12

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Dual 12-Bit 310Msps ADC

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Communications

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Cellular Basestations

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Software Defined Radios

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Medical Imaging

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High Definition Video

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Testing and Measurement Instruments

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67.6dBFS SNR

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88dB SFDR

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Low Power: 688mW Total

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Single 1.8V Supply

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DDR LVDS Outputs

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1.25GHz Full Power Bandwidth S/H

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Optional Clock Duty Cycle Stabilizer

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Low Power Sleep and Nap Modes

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Serial SPI Port for Configuration

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Pin-Compatible 14-Bit Versions

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64-Lead (9mm × 9mm) QFN Package

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 six clock cycles.

DC specs include ±0.6LSB INL (typ), ±0.1LSB DNL (typ)

and no missing codes over temperature. The transition

The digital outputs are double data rate (DDR) LVDS.

asinewave,PECL,LVDS,TTL,orCMOSinputs.Anoptional

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.

S/H

CORRECTION

LOGIC

OUTPUT

DRIVERS

12-BIT

PIPELINED

ADC CORE

CLOCK/DUTY

CYCLE

CONTROL

DA10_11

•

•

•

DA0_1

DB10_11

•

•

•

DB0_1

CLOCK

ANALOG

INPUT

215812 TA01

DDR

LVDS

DDR

LVDS

OGND

OGND

GND

CHANNEL A

S/H

CORRECTION

LOGIC

OUTPUT

DRIVERS

12-BIT

PIPELINED

ADC CORE

ANALOG

INPUT

CHANNEL B

FREQUENCY (MHz)

0

–120

–100

–80

–60

–40

0

20

40

60

80

215812 TA10b

100

140

120

–20

LTC2158-12 32K Point 2-Tone FFT,