ADV478_15 datasheet(2/12 Pages) AD

Il numero della parte	ADV478

Spiegazioni elettronici	CMOS 80 MHz Monolithic 256 3 24(18) Color Palette RAM-DACs

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REV. B

ADV478/ADV471–SPECIFICATIONS

Parameter

All Versions

Units

Test Conditions/Comments

STATIC PERFORMANCE

Resolution (Each DAC)

3

8 (6)

Bits

Accuracy (Each DAC)3

Integral Nonlinearity

±1 (1/4)

LSB max

Differential Nonlinearity

±1 (1/4)

LSB max

Guaranteed Monotonic

Gray Scale Error

±5

% Gray Scale max

Coding

Binary

DIGITAL INPUTS

Input High Voltage, VINH

2

V min

Input Low Voltage, VINL

0.8

V max

Input Current, IIN

±1

µA max

VIN = 0.4 V or 2 .4 V

Input Capacitance, CIN

7

pF max

DIGITAL OUTPUTS

Output High Voltage, VOH

2.4

V min

ISOURCE = 400

µA

Output Low Voltage, VOL

0.4

V max

ISINK = 3.2 mA

Floating-State Leakage Current

50

µA max

Floating-State Output Capacitance

7

pF max

ANALOG OUTPUTS

Gray Scale Current Range

20

mA max

Output Current

White Level Relative to Blank

17.69

mA min

Typically 19.05 mA

20.40

mA max

White Level Relative to Black

16.74

mA min

Typically 17.62 mA

18.50

mA max

Black Level Relative to Blank

0.95

mA min

Typically 1.44 mA

(SETUP = VAA)

1.90

mA max

Black Level Relative to Blank

0

µA min

Typically 5

µA

(SETUP = GND)

50

µA max

Blank Level

6.29

mA min

Typically 7.62 mA

8.96

mA max

Sync Level

0

µA min

Typically 5

µA

50

µA max

LSB Size

3

69.1 (279.68)

µA typ

8/6 = Logical 1 for ADV478

DAC to DAC Matching

5

% max

Typically 2%

Output Compliance, VOC

–1

V min

+1.5

V max

Output Impedance, ROUT

10

k

Ω typ

Output Capacitance, COUT

30

pF max

IOUT = 0 mA

VOLTAGE REFERENCE

Voltage Reference Range, VREF

1.14/1.26

V min/V max

Input Current, IVREF

10

µA typ

Tested in Voltage Reference

Configuration with VREF = 1.235 V

POWER SUPPLY

Supply Voltage, VAA

4.75/5.25

V min/V max

80 MHz and 66 MHz Parts

4.50/5.50

V min/V max

50 MHz and 35 MHz Parts

Supply Current, IAA

220

mA max

Typically 180 mA

Power Supply Rejection Ratio

0.5

%/% max

f = 1 kHz, COMP = 0.1

µF

Power Dissipation

1100

mW max

Typically 900 mW, VAA = 5 V

DYNAMIC PERFORMANCE

Clock and Data Feedthrough

4, 5

–30

dB typ

Glitch Impulse

4, 5

75

pV secs typ

DAC to DAC Crosstalk

6

–23

dB typ

NOTES

1

± 5% for 80 MHz and 66 MHz parts; ±10% for 50 MHz and 35 MHz parts.

2Temperature Range (T

MIN to TMAX); 0°C to +70°C.

3Numbers in parentheses indicate ADV471 parameter value.

4Clock and data feedthrough is a function of the amount of overshoot and undershoot on the digital inputs. For this test, the digital inputs have a 1 k

Ω resistor to

ground and are driven by 74HC logic. Glitch impulse includes clock and data feedthrough, –3 dB test bandwidth = 2

× clock rate.

5TTL input values are 0 to 3 volts, with input rise/fall times

≤3 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and out-

puts. Analog output load

≤10 pF, D0–D7 output load ≤50 pF. See timing notes in Figure 2.

6DAC to DAC crosstalk is measured by holding one DAC high while the other two are making low to high and high to low transitions.

Specifications subject to change without notice.

(VAA

1 = +5 V, SETUP = 8/6 = V

AA, VREF = +1.235 V. RSET = 147

.

All specifications TMIN to TMAX

2 unless otherwise noted.)

–2–

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