LTC2256CUJ-14-PBF datasheet(5/32 Pages) LINER

Part #	LTC2256CUJ-14-PBF

Description	14-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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5 / 32 page

5

225814p

LTC2258-14

LTC2257-14/LTC2256-14

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)

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 (Open-Drain Output. Requires 2k 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)

4

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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