LTC2756 datasheet(8/40 Pages) LINER

8 / 40 page

LTC2345-18

234518f

For more information www.linear.com/LTC2345-18

CMOS Timings

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: All voltage values are with respect to ground.

Note 3: VDDLBYP is the output of an internal voltage regulator, and should

only be connected to a 2.2μF ceramic capacitor to bypass the pin to GND,

as described in the Pin Functions section. Do not connect this pin to any

external circuitry.

Note 4: When these pin voltages are taken below ground or above VDD or

OVDD, they will be clamped by internal diodes. This product can handle

currents of up to 100mA below ground or above VDD or OVDD without

latch-up.

Note 5: VDD = 5V unless otherwise specified.

Note 6: Recommended operating conditions.

Note 7: Exceeding these limits on any channel may corrupt conversion

results on other channels. Refer to Absolute Maximum Ratings section for

pin voltage limits related to device reliability.

Note 8: VDD = 5V, OVDD = 2.5V, fSMPL = 200ksps, internal reference and

buffer, fully differential input signal drive in SoftSpan ranges 7 and 6,

bipolar input signal drive in SoftSpan ranges 3 and 2, unipolar input signal

drive in SoftSpan ranges 5, 4 and 1, unless otherwise specified.

Note 9: Integral nonlinearity is defined as the deviation of a code from a

straight line passing through the actual endpoints of the transfer curve.

The deviation is measured from the center of the quantization band.

Note 10: Guaranteed by design, not subject to test.

Note 11: For bipolar SoftSpan ranges 7, 6, 3, and 2, zero-scale error

is the offset voltage measured from –0.5LSB when the output code

flickers between 00 0000 0000 0000 0000 and 11 1111 1111 1111 1111.

Full-scale error for these SoftSpan ranges is the worst-case deviation of

the first and last code transitions from ideal and includes the effect of

offset error. For unipolar SoftSpan ranges 5, 4, and 1, zero-scale error is

the offset voltage measured from 0.5LSB when the output code flickers

between 00 0000 0000 0000 0000 and 00 0000 0000 0000 0001. Full-

scale error for these SoftSpan ranges is the worst-case deviation of the

last code transition from ideal and includes the effect of offset error.

Note 12: All specifications in dB are referred to a full-scale input in the

relevant SoftSpan input range, except for crosstalk, which is referred to

the crosstalk injection signal amplitude.

Note 13: Temperature coefficient is calculated by dividing the maximum

change in output voltage by the specified temperature range.

Note 14: When REFBUF is overdriven, the internal reference buffer must

be disabled by setting REFIN = 0V.

Note 15: IREFBUF varies proportionally with sample rate and the number of

active channels.

Note 16: Parameter tested and guaranteed at OVDD = 1.71V, OVDD = 2.5V,

and OVDD = 5.25V.

Note 17: A tSCKI period of 10ns minimum allows a shift clock frequency of

up to 100MHz for rising edge capture.

Note 18: VICM = 1.2V, VID = 350mV for LVDS differential input pairs.

aDc TiMing characTerisTics

Figure 1. Voltage Levels for Timing Specifications

LVDS Timings (Differential)

0.8 • OVDD

0.2 • OVDD

50%

234518 F01

0.2 • OVDD

0.8 • OVDD

0.2 • OVDD

0.8 • OVDD

tDELAY

tWIDTH

tDELAY

+200mV

–200mV

234518 F01b

–200mV

+200mV

–200mV

+200mV

tDELAY

tWIDTH

tDELAY

LTC2756 Datasheet(PDF) 8 Page - Linear Technology

LTC2756 Datasheet(HTML) 8 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Datasheet Download

Link URL