Datasheet

Electrical Characteristics
R
224 Datasheet
6.5.1.1 DAC DC Characteristics
Table 53. DAC DC Characteristics: Functional Operating Range (VCCDAC = 1.5 V ±5%)
Parameter Min
Typica
l
Max Units Notes
DAC Resolution 8 Bits (1)
Max Luminance (full-scale) 0.665 0.700 0.770 V (1, 2, 4) white video level voltage
Min Luminance 0.000 V (1, 3, 4) black video level voltage
LSB Current 73.2 µA (4, 5)
Integral Linearity (INL) 0 +2.0 LSB (1, 6)
Differential Linearity (DNL) -1.0 +1.0 LSB (1, 6)
Video channel-channel
voltage amplitude mismatch
6 % (7)
Monotonicity Guaranteed
NOTES:
1. Measured at each R, G, B termination. According to the VESA Test Procedure – Evaluation of Analog
Display Graphics Subsystems Proposal (Version 1, Draft 4, and December 1, 2000).
2. Max steady-state amplitude
3. Min steady-state amplitude
4. Defined for a double 75-Ω termination.
5. Set by external reference resistor value.
6. INL and DNL measured and calculated according to VESA Video Signal Standards.
7. Max full-scale voltage difference among R,G,B outputs (percentage of steady-state full-scale voltage).
Note: Reference the Intel
®
852GM/852GME/852GMV and 852PM Chipset Platform Recommended
Design and Debug Practices (RDDP), Rev. 0.8 for interconnect length specifications.
6.5.1.2 DAC Reference and Output Specifications
Table 54. DAC Reference and Output Specifications
Parameter Min Typical Max Units Notes
Reference resistor 124 127 137 Ω 1% tolerance, 1/16 W
R,G,B termination resistor 75 Ω (1) 1% tolerance, 1/16 W
Video Filter Ferrite Bead 75 Ω
(3) @ 100- MHz (each R,G,B
output)
Video Filter Capacitors 3.3 pF
(3) Two capacitors per R,G,B
output
NOTES:
1. VESA Video Signal Standard
2. Complement DAC channel output termination resistors are only required for differential video routing to
the VGA connector.
3. Video filter capacitors and ferrite bead arranged in a PI configuration (one PI filter for R,G,B outputs).
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