Linear Technology Electronic Components Datasheet

LTC2323-14 Datasheet

5Msps Differential Input ADC

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LTC2323-14

Dual, 14-Bit + Sign, 5Msps

Differential Input ADC with Wide

Input Common Mode Range

FEATURES

DESCRIPTION

n 5Msps Throughput Rate

n ±1LSB INL (Typ)

n Guaranteed 14-Bit, No Missing Codes

n 8VP-P Differential Inputs with Wide Input Common

Mode Range

n 80dB SNR (Typ) at fIN = 2MHz

n –85dB THD (Typ) at fIN = 2MHz

n Guaranteed Operation to 125°C

n Single 3.3V or 5V Supply

n Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal

Reference

n 1.8V to 2.5V I/O Voltages

n CMOS or LVDS SPI-Compatible Serial I/O

n Power Dissipation 38mW/Ch (Typ)

n Small 28-Lead (4mm × 5mm) QFN Package

APPLICATIONS

n High Speed Data Acquisition Systems

n Communications

n Remote Data Acquisition

n Imaging

n Optical Networking

n Automotive

n Multiphase Motor Control

The LTC®2323-14 is a low noise, high speed dual 14‑bit +

sign successive approximation register (SAR) ADC with

differential inputs and wide input common mode range.

Operating from a single 3.3V or 5V supply, the LTC2323-14

has an 8VP-P differential input range, making it ideal for

applications which require a wide dynamic range with high

common mode rejection. The LTC2323-14 achieves ±1LSB

INL typical, no missing codes at 14 bits and 80dB SNR.

The LTC2323-14 has an onboard low drift (20ppm/°C max)

2.048V or 4.096V temperature-compensated reference.

The LTC2323-14 also has a high speed SPI-compatible

serial interface that supports CMOS or LVDS. The fast

5Msps per channel throughput with one-cycle latency

makes the LTC2323-14 ideally suited for a wide variety of

high speed applications. The LTC2323-14 dissipates only

38mW per channel and offers nap and sleep modes to

reduce the power consumption to 5μW for further power

savings during inactive periods.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of

Analog Devices, Inc. All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

DIFFERENTIAL INPUTS

NO CONFIGURATION REQUIRED

IN+, IN–

INSTRUMENTATION

DIFFERENTIAL

25Ω

0V 0V

BIPOLAR

UNIPOLAR

25Ω

0V 0V

3.3V OR 5V

10µF

AIN1+

220pF

VDD REFOUT1

VBYP1

LTC2323-14

REFOUT2

VBYP2

AIN1–

AIN2+

AIN2–

VDD

CMOS/LVDS

REFINT

GND

SDO1

SDO2

CLKOUT

SCK

CNV

OGND OVDD

10µF

1µF

10µF

1µF

TO CONTROL

LOGIC

(FPGA, CPLD,

DSP, ETC.)

1.8V TO 2.5V

1µF

232314 TA01a

32k Point FFT, fS = 5Msps, fIN = 2.2MHz

0 SNR = 80.0dB

–20

THD = –85.5dB

SINAD = 79.1dB

SFDR = 88.4dB

–40

–60

–80

–100

–120

–140

0.5 1 1.5 2 2.5

FREQUENCY (MHz)

232314 TA01b

For more information http://www.linear.com/LTC2323-14

232314fb

Linear Technology Electronic Components Datasheet

LTC2323-14 Datasheet

5Msps Differential Input ADC

No Preview Available !

LTC2323-14

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

Supply Voltage (VDD)...................................................6V

Supply Voltage (OVDD).................................................3V

Supply Bypass Voltage (VBYP1, VBYP2)........................3V

Analog Input Voltage

AIN+, AIN– (Note 3).................... –0.3V to (VDD + 0.3V)

REFOUT1,2.............................. .–0.3V to (VDD + 0.3V)

CNV (Note 15)........................... –0.3V to (VDD + 0.3V)

Digital Input Voltage

(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)

Digital Output Voltage

(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)

Power Dissipation................................................200mW

Operating Temperature Range

LTC2323C................................................. 0°C to 70°C

LTC2323I..............................................–40°C to 85°C

LTC2323H........................................... –40°C to 125°C

Storage Temperature Range................... –65°C to 150°C

PIN CONFIGURATION

TOP VIEW

28 27 26 25 24 23

VDD 1

22 SCK–

AIN2+ 2

AIN2– 3

GND 4

GND 5

21 SCK+

20 SDO2–

29 19 SDO2+

GND 18 CLKOUT–

AIN1– 6

17 CLKOUT+

AIN1+ 7

16 SDO1–

VDD 8

15 SDO1+

9 10 11 12 13 14

UFD PACKAGE

28-LEAD (4mm × 5mm) PLASTIC QFN

TJMAX = 125°C, θJA = 43°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION http://www.linear.com/product/LTC2323-14#orderinfo

LEAD FREE FINISH

TAPE AND REEL

PART MARKING* PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC2323CUFD-14#PBF LTC2323CUFD-14#TRPBF 23234

28-Lead (4mm × 5mm) Plastic QFN

0°C to 70°C

LTC2323IUFD-14#PBF LTC2323IUFD-14#TRPBF

23234

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 85°C

LTC2323HUFD-14#PBF LTC2323HUFD-14#TRPBF 23234

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through

designated sales channels with #TRMPBF suffix.

E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C (Note 4).

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VIN+

VIN–

VIN+ – VIN–

VCM

IIN

CIN

CMRR

IREFOUT

Absolute Input Range (AIN1+, AIN2+)

Absolute Input Range (AIN1–, AIN2–)

Input Differential Voltage Range

Common Mode Input Range

Analog Input DC Leakage Current

Analog Input Capacitance

Input Common Mode Rejection Ratio

External Reference Current

(Note 5)

VIN = VIN+ – VIN–

VIN = (VIN+ + VIN–)/2

fIN = 2.2MHz

REFINT = 0V, REFOUT = 4.096V

l –REFOUT1,2

l –1

675

2 For more information www.linear.com/LTC2323-14

VDD

REFOUT1,2

VDD

µA

232314fb

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LTC2323-14 Datasheet

5Msps Differential Input ADC

LTC2323-14 Datasheet

5Msps Differential Input ADC

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