LTC2143-14 datasheet(6/36 Pages) LINER

Part #	LTC2143-14

Description	12-Bit, 125Msps/105Msps/ 80Msps Low Power Dual ADCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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6 / 36 page

LTC2145-12/

LTC2144-12/LTC2143-12

6

21454312p

DIGITAL INPUTS AND OUTPUTS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. (Note 5)

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ENCODE INPUTS (ENC+, ENC–)

Differential Encode Mode (ENC– Not Tied to GND)

VID

Differential Input Voltage

(Note 8)

l

0.2

V

VICM

Common Mode Input Voltage

Internally Set

Externally Set (Note 8)

l

1.1

1.2

1.6

V

VIN

Input Voltage Range

ENC+, ENC– to GND

l

0.2

3.6

V

RIN

Input Resistance

(See Figure 10)

10

kΩ

CIN

Input Capacitance

(Note 8)

3.5

pF

Single-Ended Encode Mode (ENC– Tied to GND)

VIH

High Level Input Voltage

VDD = 1.8V

l

1.2

V

VIL

Low Level Input Voltage

VDD = 1.8V

l

0.6

V

VIN

Input Voltage Range

ENC+ to GND

l

0

3.6

V

RIN

Input Resistance

(See Figure 11)

30

kΩ

CIN

Input Capacitance

(Note 8)

3.5

pF

DIGITAL INPUTS (CS, SDI, SCK in Serial or Parallel Programming Mode. SDO in Parallel Programming Mode)

VIH

High Level Input Voltage

VDD = 1.8V

l

1.3

V

VIL

Low Level Input Voltage

VDD = 1.8V

l

0.6

V

IIN

Input Current

VIN = 0V to 3.6V

l

–10

10

μA

CIN

Input Capacitance

(Note 8)

3

pF

SDO OUTPUT (Serial Programming Mode. Open-Drain Output. Requires 2kΩ Pull-Up Resistor if SDO is Used)

ROL

Logic Low Output Resistance to GND

VDD = 1.8V, SDO = 0V

200

Ω

IOH

Logic High Output Leakage Current

SDO = 0V to 3.6V

l

–10

10

μA

COUT

Output Capacitance

(Note 8)

3

pF

DIGITAL DATA OUTPUTS (CMOS MODES: FULL DATA RATE AND DOUBLE DATA RATE)

OVDD = 1.8V

VOH

High Level Output Voltage

IO = –500μA

l

1.750

1.790

V

VOL

Low Level Output Voltage

IO = 500μA

l

0.010

0.050

V

OVDD = 1.5V

VOH

High Level Output Voltage

IO = –500μA

1.488

V

VOL

Low Level Output Voltage

IO = 500μA

0.010

V

OVDD = 1.2V

VOH

High Level Output Voltage

IO = –500μA

1.185

V

VOL

Low Level Output Voltage

IO = 500μA

0.010

V

DIGITAL DATA OUTPUTS (LVDS MODE)

VOD

Differential Output Voltage

100Ω Differential Load, 3.5mA Mode

100Ω Differential Load, 1.75mA Mode

l

247

350

175

454

mV

VOS

Common Mode Output Voltage

100Ω Differential Load, 3.5mA Mode

100Ω Differential Load, 1.75mA Mode

l

1.125

1.250

1.375

V

RTERM

On-Chip Termination Resistance

Termination Enabled, OVDD = 1.8V

100

Ω

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