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Table 7-14, Crt display analog (dac) characteristics – AMD Geode LX [email protected] User Manual

Page 613

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AMD Geode™ LX Processors Data Book

613

Electrical Specifications

33234H

Table 7-14. CRT Display Analog (DAC) Characteristics

Symbol

Parameter

Min

Typ

Max

Units

Comments (Note 1)

V

OS

Output Voltage Saturation Limit

1.25

V

I

OVAR

Output Current

18.67

mA

Achieves 700 mV on 37.5

Ω

INL

Integral Linearity Error

+/-1

LSB

DNL

Differential Linearity Error

+/-1

LSB

t

FS

Full Scale Settling Time

2.5

ns

Note 2

--

DAC-to-DAC matching

1

4

%

--

Analog Power Supply Rejection

45

dB

@ 1 KHz

t

RISE

Output Rise Time

0.5

1.25

ns

Note 3 and Note 4

t

FALL

Output Fall Time

0.5

1.25

ns

Note 3 and Note 4

Note 1. All tests, unless otherwise specified, are at V

IO

= 3.14V to 3.46V, T

C

= 0°C to 85°C (or -40°C to 85°C if

LX [email protected] industrial temperature range part), and C

L

= 50 pF.

Note 2. Full-scale transition time is measured from 50% of full-scale transition until output remaining within 1LSB of target.
Note 3. Timing measurements are made with a 75

Ω doubly-terminated load, with VEXT

REF

= 1.235V and R

SET

= 1.2 K

Ω.

Note 4. 10% to 90% of full-scale transition.

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