Analog Devices ADV7152L Datasheet

REV. B

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

a

CMOS 220 MHz True-Color Graphics

Triple 10-Bit Video RAM-DAC

ADV7152

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] Fax: [phone]

FEATURES
220 MHz, 24-Bit (30-Bit Gamma Corrected) True Color
Triple 10-Bit “Gamma Correcting” D/A Converters
Triple 256 3 10 (256 3 30) Color Palette RAM
On-Chip Clock Control Circuit
Palette Priority Select Registers
RS-343A/RS-170 Compatible Analog Outputs
TTL Compatible Digital Inputs
Standard MPU l/O Interface

10-Bit Parallel Structure

8+2 Byte Structure
Programmable Pixel Port: 24-Bit and 8-Bit (Pseudo)
Pixel Data Serializer
Multiplexed Pixel Input Ports; 1:1, 2:1
+5 V CMOS Monolithic Construction
100-Lead Plastic Quad Flatpack (QFP)
Thermally Enhanced to Achieve u

JC

< 1.08C/W

MODES OF OPERATION
24-Bit True Color (30-Bit Gamma Corrected)

@ 220 MHz

@ 170 MHz

@ 135 MHz

@ 110 MHz

@ 85 MHz
8-Bit Pseudo Color
15-Bit True Color

APPLICATIONS
High Resolution, True Color Graphics
Professional Color Prepress Imaging

GENERAL DESCRIPTION

The ADV7152 (ADV®) is a complete analog output, Video
RAM-DAC on a single CMOS monolithic chip. The part is spe­cifically designed for use in high performance, color graphics
workstations. The ADV7152 integrates a number of graphic
functions onto one device allowing 24-bit direct True-Color op­eration at the maximum screen update rate of 220 MHz. The
ADV7152 implements 30-bit True Color in 24-bit frame buffer
designs. The part also supports other modes, including 15-bit
True Color and 8-bit Pseudo or Indexed Color. Either the Red,
Green or Blue input pixel ports can be used for Pseudo Color.

The device consists of three, high speed, 10-bit, video D/A con­verters (RGB), three 256 3 10 (one 256 3 30) color look-up
tables, palette priority selects, a pixel input data multiplexer/
serializer and a clock generator/divider circuit. The ADV7152
implements 1:1 and 2:1 pixel data multiplexing. The onboard
palette priority select inputs enable multiple palette devices to
be connected together for use in multipalette and window

(Continued on page 10)

ADV is a registered trademark of Analog Devices, Inc.

FUNCTIONAL BLOCK DIAGRAM

256-COLOR/GAMMA

PALETTE RAM

10 IOR

48

A

B

24

24

P

I
X
E
L

P
O
R
T

MUX

2:1

30

RED

256 x 10

MPU PORT

D9 – D0

10 (8+2)

C0 C1

LOADIN

CLOCK

LOADOUT

PRGCKOUT

SCKIN

SCKOUT

CLOCK DIVIDE

&

SYNCHRONIZATION

CIRCUIT

÷32, ÷16, ÷8, ÷4, ÷2

ADDR

(A0-–A15)

REVISION

REGISTER

COMMAND

REGISTERS

(CR1-CR3)

TEST

REGISTERS

(MR1)

VOLTAGE

REFERENCE

CIRCUIT

ADV7152

V

REF

R

SET

C

OMP

SYNC

OUTPUT

I

PLL

RED (R0–R7),
GREEN (G0–G7),
BLUE (B0–B7)
COLOR DATA

V

AA

GND

DATA TO

PALETTES

CONTROL REGISTERS

COLOR REGISTERS

ADDRESS

REGISTER

CLOCK CONTROL

MODE

REGISTER

GREEN

256 x 10

BLUE

256 x 10

PALETTE
SELECTS

(PS0, PS1)

ID

REGISTER

PIXEL MASK

REGISTER

8

CE

R/W

IOR

IOG
IOG

IOB
IOB

10-BIT

GREEN DAC

10

10

BLUE

REGISTER

RED

REGISTER

ECL TO CMOS

8

8

2

4

4

SYNC

BLANK

CLOCK

MUX

2:1

10-BIT

RED DAC

10-BIT

BLUE DAC

GREEN

REGISTER

SYNCOUT

REV. B

–2–

ADV7152–SPECIFICA TIONS

(V

AA

1

= +5 V; V

REF

= +1.235 V; R

SET

= 280 V. IOR, IOG, IOB (RL = 37.5 V,

CL = 10 pF); IOR, IOG, IOB = GND. All specifications T

MIN

to T

MAX

2

unless otherwise noted.)

Parameter All Versions Unit Test Conditions/Comments

STATIC PERFORMANCE

Resolution (Each DAC) 10 Bits
Accuracy (Each DAC)

Integral Nonlinearity ±1 LSB max
Differential Nonlinearity ±1 LSB max Guaranteed Monotonic
Gray Scale Error ±5 % Gray Scale max

Coding Binary

DIGITAL INPUTS (Excluding CLOCK, CLOCK)

Input High Voltage, V

INH

2 V min

Input Low Voltage, V

INL

0.8 V max

Input Current, I

IN

±10 µA max VIN = 0.4 V or 2.4 V

Input Capacitance, C

IN

10 pF typ

CLOCK INPUTS (CLOCK, CLOCK)

Input High Voltage, V

INH

VAA – 1.0 V min

Input Low Voltage, V

INL

VAA – 1.6 V max

Input Current, I

IN

±10 µA max VIN = 0.4 V or 2.4 V

Input Capacitance, C

IN

10 pF typ

DIGITAL OUTPUTS

Output High Voltage, V

OH

2.4 V min I

SOURCE

= 400 µA

Output Low Voltage, V

OL

0.4 V max I

SINK

= 3.2 mA
Floating-State Leakage Current 20 µA max
Floating-State Output Capacitance 20 pF typ

ANALOG OUTPUTS

Gray Scale Current Range 15/22 mA min/max
Output Current

White Level Relative to Blank 17.69/20.40 mA min/max Typically 19.05 mA
White Level Relative to Black 16.74/18.50 mA min/max Typically 17.62 mA
Black Level Relative to Blank 0.95/1.90 mA min/max Typically 1.44 mA
Blank Level on IOR, IOB 0/50 µA min Typically 5 µA
Blank Level on IOG 6.29/8.96 mA min/max Typically 7.62 mA
Sync Level on IOG 0/50 µA min/max Typically 5 µA

LSB Size 17.22 µA typ
DAC-to-DAC Matching 3 % max Typically 1%
Output Compliance, V

OC

0/+1.4 V min/V max

Output Impedance, R

OUT

100 kΩ typ

Output Capacitance, C

OUT

30 pF max I

OUT

= 0 mA

VOLTAGE REFERENCE

Voltage Reference Range, V

REF

1.14/1.26 V min/V max V

REF

= 1.235 V for Specified Performance

Input Current, I

VREF

+5 µA typ

POWER REQUIREMENTS

V

AA

5 V nom

I

AA

3

400 mA max 220 MHz Parts

I

AA

370 mA max 170 MHz Parts

I

AA

350 mA max 135 MHz Parts

I

AA

330 mA max 110 MHz Parts

I

AA

315 mA max 85 MHz Parts

Power Supply Rejection Ratio 0.5 %/% max Typically 0.12%/%, COMP = 0.1 µF

DYNAMIC PERFORMANCE

Clock and Data Feedthrough

4, 5

–30 dB typ

Glitch Impulse 50 pV secs typ
DAC-to-DAC Crosstalk

6

–23 dB typ

NOTES

1

±5% for all versions.

2

Temperature range (T

MIN

to T

MAX

): 0°C to +70°C; TJ (Silicon Junction Temperature) ≤ 100°C.

3

Pixel Port is continuously clocked with data corresponding to a linear ramp. TJ = 100°C.

4

Clock and data feedthrough is a function of the amount of overshoot and undershoot on the digital inputs. Glitch impulse includes clock and data feedthrough.

5

TTL input values are 0 to 3 volts, with input rise/fall times ≤ 3 ns, measured the 10% and 90% points. Timing reference points at 50% for inputs and outputs.

6

DAC-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.

ADV7152

–3–

REV. B

TIMING CHARACTERISTICS

1

CLOCK CONTROL AND PIXEL PORT

4

220 MHz 170 MHz 135 MHz 110 MHz 85 MHz

Parameter Version Version Version Version Version Units Conditions/Comments

f

CLOCK

220 170 135 110 85 MHz max Pixel CLOCK Rate

t

1

4.55 5.88 7.4 9.1 11.77 ns min Pixel CLOCK Cycle Time

t

2

2 2.5 3 4 4 ns min Pixel CLOCK High Time

t

3

2 2.5 3.2 4 4 ns min Pixel CLOCK Low Time

t

4

10 10 10 10 10 ns max Pixel CLOCK to LOADOUT Delay

f

LOADIN

LOADIN Clocking Rate
1:1 Multiplexing 110 110 110 110 85 MHz max
2:1 Multiplexing 110 85 67.5 55 42.5 MHz max

t

5

LOADIN Cycle Time
1:1 Multiplexing 9.1 9.1 9.1 9.1 11.76 ns min
2:1 Multiplexing 9.1 11.76 14.8 18.18 23.53 ns min

t

6

LOADIN High Time
1:1 Multiplexing 44444ns min
2:1 Multiplexing 45689ns min

t

7

LOADIN Low Time
1:1 Multiplexing 44444ns min
2:1 Multiplexing 45689ns min

t

8

00000ns minPixel Data Setup Time

t

9

55555ns minPixel Data Hold Time

t

10

00000ns minLOADOUT to LOADIN Delay

τ–t

11

5

τ–5 τ–5 τ–5 τ–5 τ–5 ns max LOADOUT to LOADIN Delay

t

PD

6

Pipeline Delay
1:1 Multiplexing 55555CLOCKs (1 × CLOCK = t

1

)

2:1 Multiplexing 66666CLOCKs

t

12

10 10 10 10 10 ns max Pixel CLOCK to PRGCKOUT Delay

t

13

55555ns maxSCKIN to SCKOUT Delay

t

14

55555ns minBLANK to SCKIN Setup Time

t

15

11111ns minBLANK to SCKIN Hold Time

ANALOG OUTPUTS

7

220 MHz 170 MHz 135 MHz 110 MHz 85 MHz

Parameter Version Version Version Version Version Units Conditions/Comments

t

16

15 15 15 15 15 ns typ Analog Output Delay

t

17

11111ns typAnalog Output Rise/Fall Time

t

18

15 15 15 15 15 ns typ Analog Output Transition Time

t

SK

22222ns maxAnalog Output Skew (IOR, IOG, IOB)
00000ns typ

MPU PORTS

8, 9

220 MHz 170 MHz 135 MHz 110 MHz 85 MHz

Parameter Version Version Version Version Version Units Conditions/Comments

t

19

33333ns minR/W, C0, C1 to CE Setup Time

t

20

10 10 10 10 10 ns min R/W, C0, C1 to CE Hold Time

t

21

45 45 45 45 45 ns min CE Low Time

t

22

25 25 25 25 25 ns min CE High Time

t

23

8

55555ns minCE Asserted to Databus Driven

t

24

9

45 45 45 45 45 ns max CE Asserted to Data Valid

t

25

9

20 20 20 20 20 ns max CE Disabled to Databus Three-Stated
55555ns min

t

26

20 20 20 20 20 ns min Write Data (D0–D9) Setup Time

t

27

55555ns minWrite Data (D0–D9) Hold Time

(V

AA

2

= +5 V; V

REF

= +1.235 V; R

SET

= 280 V. IOR, IOG, IOB (RL = 37.5 V, CL = 10 pF);

IOR, IOG, I0B = GND. All specifications T

MIN

to T

MAX

3

unless otherwise noted.)

ADV7152

–4–

REV. B

NOTES

1

TTL input values are 0 to 3 volts, with input rise/fall times ≤ 3 ns, measured between the 10% and 90% points. ECL inputs (CLOCK, CLOCK) are

VAA–0.8 V to VAA–1.8 V, with input rise/fall times ≤ 2 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and out­puts. Analog output load ≤ 10 pF. Databus (D0–D9) loaded as shown in Figure 1. Digital output load for LOADOUT, PRGCKOUT, SCKOUT, I

PLL

and

SYNCOUT ≤ 30 pF.

2

±5% for all versions.

3

Temperature range (T

MIN

to T

MAX

): 0°C to +70°C; TJ (Silicon Junction Temperature) ≤ 100°C.

4

Pixel Port consists of the following inputs: Pixel Inputs: RED [A, B]; GREEN [A, B]; BLUE [A, B], Palette Selects: PS0 [A, B]; PS1 [A, B]; Pixel Controls:

SYNC, BLANK; Clock Inputs: CLOCK, CLOCK, LOADIN, SCKIN; Clock Outputs: LOADOUT, PRGCKOUT, SCKOUT.

5

τ is the LOADOUT Cycle Time and is a function of the Pixel CLOCK Rate and the Multiplexing Mode: 1:1 multiplexing; τ = CLOCK = t1 ns; 2:1 multi-

plexing, τ = CLOCK × 2 = 2 × t1 ns.

6

These fixed values for Pipeline Delay are valid under conditions where t10 and τ–t11 are met. If either t10 or τ–t11 are not met, the part will operate but the Pipe-

line Delay is increased by 2 clock cycles for 2:1 mode after calibration cycle is performed.

7

Output delay measured from the 50% point of the rising edge of CLOCK to the 50% point of full-scale transition. Output rise/fall time measured between the

10% and 90% points of full-scale transition. Settling time measured from the 50% point of full-scale transition to the output remaining within ±1 LSB. (Settling time
does not include clock and data feedthrough.)

8

t23 and t24 are measured with the load circuit of Figure 1 and defined as the time required for an output to cross 0.4 V or 2.4 V.

9

t25 is derived from the measured time taken by the data outputs to change by 0.5 V when loaded with the circuit of Figure 1. The measured number is then extrapo-

lated back to remove the effects of charging the 100 pF capacitor. This means that the time, t25, quoted in the Timing Characteristics is the true value for the device
and as such is independent of external databus loading capacitances.

Specifications subject to change without notice.

I

SINK

+2.1V

TO

OUTPUT

PIN

I

SOURCE

100pF

Figure 1. Load Circuit for Databus Access and Relinquish Times

t

3

t

2

CLOCK

LOADOUT

(1:1 MULTIPLEXING)

LOADOUT

(2:1 MULTIPLEXING)

CLOCK

t

4

t

1

Figure 2. LOADOUT vs. Pixel Clock Input (CLOCK,

CLOCK

)

PIXEL INPUT

DATA*

LOADIN

t8t

9

*INCLUDES PIXEL DATA (R0-R7, G0-G7, B0-B7); PALETTE SELECT INPUTS (PS0-PS1); SYNC; BLANK

VALID
DATA

VALID
DATA

VALID
DATA

t

5

t

6

t

7

Figure 3. LOADIN vs. Pixel Input Data

ADV7152

–5–

REV. B

PIXEL INPUT

DATA*

CLOCK

LOADOUT

LOADIN

ANALOG

OUTPUT

DATA

t

10

A

N

B

N

A

N+1

B

N+1

A

N-1BN-1

A

N+2BN+2

A

N

B

N

A

N+1BN+1

A

N+2BN+2

DIGITAL INPUT TO ANALOG OUTPUT PIPELINE

t

PD

*INCLUDES PIXEL DATA (R0–R7, G0–G7, B0–B7); PALETTE SELECT INPUTS (PS0-PS1); SYNC; BLANK

IOR, IOR
IOG, IOG
IOB, IOB
I

PLL

, SYNCOUT

Figure 4. Pixel Input to Analog Output Pipeline with Minimum LOADOUT to LOADIN Delay (2:1 Multiplex Mode)

PIXEL INPUT

DATA*

CLOCK

LOADOUT

LOADIN

ANALOG

OUTPUT

DATA

*INCLUDES PIXEL DATA (R0–R7, G0–G7, B0–B7); PALETTE SELECT INPUTS (PS0–PS1); SYNC; BLANK

DIGITAL INPUT TO ANALOG OUTPUT PIPELINE

A

N

B

N

A

N+1BN+1

A

N+2BN+2

ANBNA

N+1

B

N+1

A

N-1BN-1

A

N+2BN+2

t

PD

τ

τ- t

11

IOR, IOR
IOG, IOG
IOB, IOB
I

PLL

, SYNCOUT

Figure 5. Pixel Input to Analog Output Pipeline with Maximum LOADOUT to LOADIN Delay (2:1 Multiplex Mode)

t

12

CLOCK

PRGCKOUT

(CLOCK/4)

PRGCKOUT

(CLOCK/8)

PRGCKOUT

(CLOCK/16)

PRGCKOUT

(CLOCK/32)

*INLCUDES PIXEL DATA (R0-R7, G0-G7, B0-B7); PALETTE SELECT INPUTS (PS0-PS1); SYNC; BLANK

Figure 6. Pixel Clock Input vs. Programmable Clock Output (PRGCKOUT)

ADV7152

–6–

REV. B

SCKIN

END OF SCAN

LINE (N)

t

13

SCKOUT

START OF SCAN

LINE (N+1)

BLANKING PERIOD

t

15

t

14

BLANK

*INCLUDES PIXEL DATA (R0-R7, G0-G7, B0-B7); PALETTE SELECT INPUTS (PS0-PS1); SYNC; BLANK

Figure 7. Video Data Shift Clock Input (SCKIN) & BLANK vs. Video Data Shift Clock Output (SCKOUT)

CLOCK

t

17

10 %

50 %

90 %

t

16

t

18

WHITE LEVEL

BLACK LEVEL

FULL SCALE
TRANSITION

ANALOG

OUTPUTS

IOR, IOR
IOG, IOG
IOB, IOB
I

PLL

, SYNCOUT

NOTE:
THIS DIAGRAM IS NOT TO SCALE. FOR THE PURPOSES OF CLARITY,
THE ANALOG OUTPUT WAVEFORM IS MAGNIFIED IN TIME AND
AMPLITUDE W.R.T. THE CLOCK WAVEFORM.

I

PLL

AND SYNCOUT ARE DIGITAL OUTPUT SIGNALS. t16 IS THE ONLY

RELEVANT OUTPUT TIMING SPECIFICATION FOR I

PLL

AND SYNCOUT.

Figure 8. Analog Output Response vs. CLOCK

t

20

VALID

CONTROL DATA

t

21

t

23

t

26

t

27

D0–D9

(READ MODE)

D0–D9

(WRITE MODE)

CE

R/W, C0, C1

R/W = 1

R/W = 0

t

19

t

22

t

25

t

24

Figure 9. Microprocessor Port (MPU) Interface Timing

ADV7152

–7–

REV. B

RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Units

Power Supply V

AA

4.75 5.00 5.25 Volts

Ambient Operating Temperature T

A

0 +70 °C

Reference Voltage V

REF

1.14 1.235 1.26 Volts

Output Load R

L

37.5 Ω

ABSOLUTE MAXIMUM RATINGS

1

VAA to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V

Voltage on Any Digital Pin . . . . GND – 0.5 V to V

AA

+ 0.5 V

Ambient Operating Temperature (T

A

) . . . . . –55°C to +125°C

Storage Temperature (T

S

) . . . . . . . . . . . . . . –65°C to +150°C

Junction Temperature (T

J

) . . . . . . . . . . . . . . . . . . . . +150°C

Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +260°C

Vapor Phase Soldering (1 minute) . . . . . . . . . . . . . . . +220°C

Analog Outputs to GND

2

. . . . . . . . . . . . . GND – 0.5 to V

AA

NOTES

1

Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those listed in the
operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.

2

Analog Output Short Circuit to any Power Supply or Common can be of an
indefinite duration.

ORDERING GUIDE

1, 2, 3

Speed

220 MHz ADV7152LS220 110 MHz ADV7152LS110
170 MHz ADV7152LS170 85 MHz ADV7152LS85
135 MHz ADV7152LS135

NOTES

1

ADV7152 is packaged in a 100-pin plastic quad flatpack, QFP.

2

All devices are specified for 0°C to +70°C operation.

3

Contact sales office for latest information on package design.

100-Lead QFP Configuration

100

31

50

81

30

51

80

ROW B

ROW D

ROW C

Top View

(Not to Scale)

ADV7152

QFP

ROW A

1

PIN NO. 1 IDENTIFIER

WARNING!

ESD SENSITIVE DEVICE

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADV7152 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.

PIN ASSIGNMENTS

Pin Pin Pin
No. Mnemonic No. Mnemonic No. Mnemonic

1 SYNC 41 SCKOUT 81 D5
2

BLANK 42 SYNCOUT 82 V

AA

3R0

A

43 GND 83 D6

4R0

B

44 GND 84 D7
5 GND 45 GND 85 D8
6R1

A

46 GND 86 D9
7R1

B

47 G6

A

87 GND

8R2

A

48 G6

B

88 GND

9R2

B

49 G7

A

89 IOB

10 R3

A

50 G7

B

90 IOR

11 R3

B

51 PS0

A

91 IOG

12 R4

A

52 PS0

B

92 IOB

13 R4

B

53 PS1

A

93 IOG

14 R5

A

54 PS1

B

94 V

AA

15 R5

B

55 B0

A

95 I

PLL

16 R6

A

56 B0

B

96 IOR

17 R6

B

57 B1

A

97 COMP

18 R7

A

5 8 B1

B

98 V

REF

19 R7

B

5 9 B2

A

99 R

SET

20 G0

A

60 B2

B

100 V

AA

21 G0

B

61 B3

A

22 G1

A

62 B3

B

23 G1

B

63 B4

A

24 G2

A

64 B4

B

25 G2

B

65 B5

A

26 NC 66 B5

B

27 G3

A

67 B6

A

28 G3

B

68 B6

B

29 G4

A

69 B7

A

30 G4

B

70 B7

B

31 G5

A

71 CE
32 G5

B

72 R/W
33

CLOCK 73 C0
34 CLOCK 74 C1
35 LOADIN 75 D0
36 LOADOUT 76 D1
37 V

AA

77 D2

38 V

AA

78 GND
39 PRGCKOUT 79 D3
40 SCKIN 80 D4

NC = NO CONNECT.

ADV7152

–8–

REV. B

PIN FUNCTION DESCRIPTION

Mnemonic Function

RED (R0A . . . R0B–R7A . . . R7B), Pixel Port (TTL Compatible Inputs). 48 pixel select inputs, with 8 bits each for Red, 8
GREEN (G0

A

. . . G0B–G7A. . . G7B), bits for Green and 8 bits for Blue. Each bit is multiplexed [A-B] 2:1 or 1:1. It can be

BLUE (B0

A

. . . B0B–B7A . . . B7B) configured for 24-Bit True-Color Data, 8-Bit Pseudo-Color Data and 15-Bit True-Color

Data formats. Pixel Data is latched into the device on the rising edge of LOADIN.

PS0

A

. . . PS0B, PS1A . . . PS1

B

Palette Priority Selects (TTL Compatible Inputs): These pixel port select inputs deter­mine whether or not the device’s pixel data port is selected on a pixel by pixel basis. The
palette selects allow switching between multiple palette devices. The device can be pre­programmed to completely shut off the DAC analog outputs. If the values of PS0 and
PS1 match the values programmed into bits MR16 and MR17 of the Mode Register,
then the device is selected. Each bit is multiplexed [A-B] 2:1 or 1:1. PS0 and PS1 are
latched into the device on the rising edge of LOADIN.

LOADIN Pixel Data Load Input (TTL Compatible Input). This input latches the multiplexed

pixel data, including PS0–PS1,

BLANK and SYNC into the device.

LOADOUT Pixel Data Load Output (TTL Compatible Output). This output control signal runs at a

divided down frequency of the pixel CLOCK input. Its frequency is a function of the
multiplex rate. It can be used to directly or indirectly drive LOADIN

f

LOADOUT

= f

CLOCK

/M

where (M = 1 for 1:1 Multiplex Mode)

where (M = 2 for 2:1 Multiplex Mode).

PRGCKOUT Programmable Clock Output (TTL Compatible Output). This output control signal

runs at a divided down frequency of the pixel CLOCK input. Its frequency is user
programmable and is determined by bits CR30 and CR31 of Command Register 3

f

PRGCKOUT

= f

CLOCK

/N

where N = 4, 8, 16 and 32.

SCKIN Video Shift Clock Input (TTL Compatible Input). The signal on this input is internally

gated synchronously with the

BLANK signal. The resultant output, SCKOUT, is a

video clocking signal that is stopped during video blanking periods.

SCKOUT Video Shift Clock Output (TTL Compatible Output). This output is a synchronously

gated version of SCKIN and

BLANK. SCKOUT, is a video clocking signal that is

stopped during video blanking periods.

CLOCK,

CLOCK Clock Inputs (ECL Compatible Inputs). These differential clock inputs are designed to

be driven by ECL logic levels configured for single supply (+5 V) operation. The clock
rate is normally the pixel clock rate of the system.

BLANK Composite Blank (TTL Compatible Input). This video control signal drives the analog

outputs to the blanking level.

SYNC Composite-Sync Input (TTL Compatible Input). This video control signal drives the

IOG analog output to the

SYNC level. It is only asserted during the blanking period.

CR22 in Command Re

gister 2 must be set if SYNC is to be decoded onto the analog

output, otherwise the

SYNC input is ignored.

SYNCOUT Composite SYNC O/P (TTL Compatible Output). This video output is a delayed ver-

sion of

SYNC. The delay corresponds to the number of pipeline stages of the device.

D0–D9 Databus (TTL Compatible Input/Output Bus). Data, including color palette values and

device control information is written to and read from the device over this 10-bit, bidi­rectional databus. 10-bit data or 8-bit data can be used. The databus can be configured
for either 10-bit parallel data or byte data (8+2) as well as standard 8-bit data. Any un­used bits of the databus should be terminated through a resistor to either he digital
power plane (V

CC

) or GND.

CE Chip Enable (TTL Compatible Input). This input must be at Logic “0” when writing to

or reading from the device over the databus (D0–D9). Internally, data is latched on the
rising edge of CE.

ADV7152

–9–

REV. B

Mnemonic Function

R/

W Read/Write Control (TTL Compatible Input). This input determines whether data is

written to or read from the device’s registers and color palette RAM. R/

W and CE must

be at Logic “0” to write data to the part. R/

W must be at Logic “1” and CE at Logic

“0” to read from the device.

C0, C1 Command Controls (TTL Compatible Inputs). These inputs determine the type of read

or write operation being performed on the device over the databus (see Interface Truth
Table). Data on these inputs is latched on the falling edge of

CE.

IOR;

IOR, IOG; IOG, IOB; Red, Green and Blue Current Outputs (High Impedance Current Sources). These RGB

IOB video outputs are specified to directly drive RS-343A and RS-170 video levels into dou-

bly terminated 75 Ω loads.
IOR, IOG and IOB are the complementary outputs of IOR, IOG and IOB. These out-

puts can be tied to GND if it is not required to use differential outputs.

V

REF

Voltage Reference Input (Analog Input). An external 1.235 V voltage reference is re­quired to drive this input. An AD589 (2-terminal voltage reference) or equivalent is rec­ommended. (Note: It is not recommended to use a resistor network to generate the
voltage reference.)

R

SET

Output Full-Scale Adjust Control (Analog Input). A resistor connected between this pin
and analog ground controls the absolute amplitude of the output video signal. The value
of R

SET

is derived from the full-scale output current on IOG according to the following

equations:

R

SET

(Ω) = C1 × R

REF

/IOG (mA); SYNC on GREEN

R

SET

(Ω) = C2 × R

REF

/IOG (mA); No SYNC on GREEN.

Full-Scale output currents on IOR and IOB for a particular value of R

SET

are given by:

IOR (mA)= C2 × R

REF

(V)/R

SET

(Ω)

and

IOB (mA) = C2 × R

REF

(V)/R

SET

(Ω)

where C1 = 6,050: PEDESTAL = 7.5 IRE

where C1 = 5,723: PEDESTAL = 0 IRE

and

where C2 = 4,323: PEDESTAL = 7.5 IRE

where C1 = 3,996: PEDESTAL = 0 IRE.

COMP Compensation Pin. A 0.1 µF capacitor should be connected between this pin and VAA.
I

PLL

Phase Lock Loop Output Current (High Impedance Current Source). This output is

used to enable multiple ADV7150/ADV7152s along with ADV7151s to be synchronized

together with subpixel resolution when using an external PLL. This output is triggered

either from the falling edge of

SYNC or BLANK as determined by bit CR21 of Com-

mand Register 2. When activated, it supplies a current corresponding to

I

PLL

(mA) = 1,728 × R

REF

(V)/R

SET

(Ω)

When not using the I

PLL

function, this output pin should be tied to GND.

V

AA

Power Supply (+5 V ± 5%). The part contains multiple power supply pins, all should be

connected together to one common +5 V filtered analog power supply.
GND Analog Ground. The part contains multiple ground pins, all should be connected

together to the system’s ground plane.

ADV7152

–10–

REV. B

(Continued from page 1)

applications. The part is controlled and programmed through
the microprocessor (MPU) port. The part also contains a num­ber of onboard test registers, associated with self diagnostic test­ing of the device.

The individual Red, Green and Blue pixel input ports allow
True-Color, image rendition. True-Color image rendition, at
speeds of up to 220 MHz, is achieved through the use of the
onboard data multiplexer/serializer. The pixel input ports flex­ibility allows for direct interface to most standard frame buffer
memory configurations.

The 30 bits of resolution, associated with the color look-up
table and triple 10-bit DAC, realizes 24-bit True-Color resolu­tion, while also allowing for the onboard implementation of lin­earization algorithms, such as Gamma-Correction. This allows
effective 30-bit True-Color operation.

The on-chip video clock controller circuit generates all the in­ternal clocking and some additional external clocking signals.

An external ECL oscillator source with differential outputs is all
that is required to drive the CLOCK and

CLOCK inputs of the
ADV7152. The part can also be driven by an external clock
generator chip circuit, such as the AD730.

The ADV7152 is capable of generating RGB video output sig­nals which are compatible with RS-343A and RS-170 video
standards, without requiring external buffering.

Test diagnostic circuitry has been included to complement the
users system level debugging.

The ADV7152 is fabricated in a +5 V CMOS process. Its
monolithic CMOS construction ensures greater functionality
with low power dissipation.

The ADV7152 is packaged in a plastic 100-pin power quad flat­pack (QFP). Superior thermal dissipation is achieved by inclu­sion of a copper heatslug, within the standard package outline
to which the die is attached.

Pixel Port and Clock Control Circuit

The Pixel Port of the ADV7152 is directly interfaced to the
video/graphics pipeline of a computer graphics subsystem. It is
connected directly or through a gate array to the video RAM of
the systems Frame-Buffer (video memory). The pixel port on
the device consists of:

Color Data RED, GREEN, BLUE
Pixel Controls

SYNC, BLANK

Palette Selects PS0–PS1
The associated clocking signals for the pixel port include:
Clock Inputs CLOCK, CLOCK,

LOADIN, SCKIN

Clock Outputs LOADOUT, PRGCKOUT,

SCKOUT

These onboard clock control signals are included to simplify
interfacing between the part and the frame buffer. Only two
control input signals are necessary to get the part operational,
CLOCK and

CLOCK (ECL Levels). No additional signals or

external glue logic are required to get the Pixel Port & Clock

Control Circuit of the part operational.

Pixel Port (Color Data)

The ADV7152 has 48 color data inputs. The part has two (for
2:1 multiplexing) 24-bit wide direct color data inputs. These
are user programmed to support a number of color data for­mats including 24-Bit True Color, 15-Bit True Color and
8-Bit Pseudo Color (see “Color Data Formats” section) in 2:1
and 1:1 multiplex modes.

A

B

MULTIPLEXER

24

24

24

RED

GREEN

BLUE

8

8

8

Figure 10. Multiplexed Color Inputs for the ADV7152

CIRCUIT DETAILS AND OPERATION

OVERVIEW

Digital video or pixel data is latched into the ADV7152 over the
devices Pixel Port. This data acts as a pointer to the onboard
Color Palette RAM. The data at the RAM address pointed to is
latched into the digital-to-analog converters (DACs) and output
as an RGB analog video signal.

For the purposes of clarity of description, the ADV7152 is bro­ken down into three separate functional blocks. These are:

1. Pixel port and clock control circuit

2. MPU port, registers and color palette

3. Digital-to-analog converters and video outputs
Table I shows the architectural and packaging differences be-

tween other devices in the ADV715x series of workstation parts.
(For more details consult the relevant data sheets.)

Table I. Architectural and Packaging Differences of the
ADV715x Series

Description ADV7150* ADV7152 ADV7151*

24-Bit “Gamma” True Color • •
24-Bit “Standard” True Color • •
8-Bit “Gamma” Pseudo Color • • •
8-Bit “Standard” Pseudo Color • • •
15-Bit True Color • •
220 MHz – True Color • •
220 MHz – Pseudo Color • • •
Triple 10-Bit DACs • • •
4:1 Multiplexing • •
2:1 Multiplexing • • •
1:1 Multiplexing • • •
160-Lead QFP •
100-Lead QFP • •

*See ADV7151 and ADV7150 data sheets for more information on these parts.