ADV7197KST Analog Devices, ADV7197KST Datasheet

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ADV7197KST

Manufacturer Part Number
ADV7197KST
Description
Multiformat HDTV Encoder with Three 11-Bit DACs
Manufacturer
Analog Devices
Datasheet
a
GENERAL DESCRIPTION
The ADV7197 is a triple, high-speed, digital-to-analog encoder
on a single monolithic chip. It consists of three high-speed video
D/A converters with TTL-compatible inputs.
The ADV7197 has three separate 10-bit-wide input ports that
accept data in 4:4:4 10-bit YCrCb or RGB, or 4:2:2 10-bit
YCrCb. This data is accepted in HDTV format at 74.25 MHz
or 74.1758 MHz. For any other high definition standard but
SMPTE274M or SMPTE296M, the Async Timing Mode can
be used to input data to the ADV7197. For all standards,
ADV is a registered trademark of Analog Devices, Inc.
HORIZONTAL
external horizontal, vertical, and blanking signals or EAV/SAV
codes control the insertion of appropriate synchronization signals
into the digital data stream and therefore the output signals.
The ADV7197 outputs analog YPrPb HDTV complying to
EIA-770.3, or RGB complying to RS-170/RS-343A.
The ADV7197 requires a single 5 V/3.3 V power supply, an
optional external 1.235 V reference, and a 74.25 MHz (or
74.1758 MHz) clock.
The ADV7197 is packaged in a 52-lead MQFP package.
Multiformat HDTV Encoder with
BLANKING
VERTICAL
Cb0–Cb9
Cr0–Cr9
RESET
Y0–Y9
CLKIN
SYNC
SYNC
FUNCTIONAL BLOCK DIAGRAM
GENERATOR
PATTERN
DELAY
TEST
AND
GENERATOR
TIMING
4:2:2 TO 4:4:4
4:2:2 TO 4:4:4
CHROMA
CHROMA
Three 11-Bit DACs
(SSAF)
(SSAF)
I
2
PORT
GENERATOR
C MPU
SYNC
ADV7197
DAC CONTROL
BLOCK
ADV7197
+ SYNC
11-BIT
11-BIT
11-BIT
DAC
DAC
DAC
DAC A (Y)
DAC B
DAC C
COMP
V
R
REF
SET

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ADV7197KST Summary of contents

Page 1

... MHz. For any other high definition standard but SMPTE274M or SMPTE296M, the Async Timing Mode can be used to input data to the ADV7197. For all standards, ADV is a registered trademark of Analog Devices, Inc. Multiformat HDTV Encoder with Three 11-Bit DACs FUNCTIONAL BLOCK DIAGRAM Y0– ...

Page 2

ADV7197–SPECIFICATIONS ( SPECIFICATIONS 70 C] unless otherwise noted.) Parameter STATIC PERFORMANCE Resolution Integral Nonlinearity Differential Nonlinearity DIGITAL OUTPUTS Output High Voltage Output Low Voltage Three-State ...

Page 3

AA 3.3 V SPECIFICATIONS unless otherwise noted.) Parameter STATIC PERFORMANCE Resolution Integral Nonlinearity Differential Nonlinearity DIGITAL OUTPUTS Output High Voltage Output Low Voltage Three-State Leakage Current Three-State Output Capacitance DIGITAL AND ...

Page 4

ADV7197–SPECIFICATIONS 5 V DYNAMIC–SPECIFICATIONS Parameter Luma Bandwidth Chroma Bandwidth Signal-to-Noise Ratio Chroma/Luma Delay Inequality Specifications subject to change without notice. 3.3 V DYNAMIC–SPECIFICATIONS Parameter Luma Bandwidth Chroma Bandwidth Signal-to-Noise Ratio Chroma/Luma Delay Inequality Specifications subject to change without notice. 5 ...

Page 5

V TIMING–SPECIFICATIONS P arameter 1 MPU PORT SCLOCK Frequency SCLOCK High Pulsewidth SCLOCK Low Pulsewidth Hold Time (Start Condition Setup Time (Start Condition Data Setup Time SDATA, SCLOCK Rise ...

Page 6

ADV7197 CLOCK PIXEL INPUT DATA t 11 CLOCK PIXEL INPUT DATA ... ... Cb0 Cb1 Cb2 Cb3 ... Cr0 Cr1 Cr2 Cr3 ... ...

Page 7

HSYNC VSYNC A DV PIXEL DATA CLK CYCLES FOR 1080i MIN CLK CYCLES FOR 720P MIN B = 236 CLK CYCLES FOR 1080i MIN B = 300 CLK CYCLES FOR 720P MIN t 3 ...

Page 8

... OUT Model Temperature Range ADV7197KST 0°C to 70°C 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 ADV7197 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges ...

Page 9

Pin Mnemonic Input/Output 2–11 Y0–Y9 I 13, 52 GND G 14–23 Cr0–Cr9 I 24 CLKIN I 26, 33 AGND VSYNC TSYNC HSYNC/ 29 SYNC ...

Page 10

ADV7197 FUNCTIONAL DESCRIPTION Digital Inputs The digital inputs of the ADV7197 are TTL-compatible. 30-bit YCrCb or RGB pixel data in 4:4:4 format or 20-bit YCrCb pixel data in 4:2:2 format is latched into the device on the rising edge of ...

Page 11

A Logic “0” on the LSB of the first byte means that the master will write information to the peripheral. A Logic “1” on the LSB of the first byte means that the master will read information from the peripheral. ...

Page 12

ADV7197 MODE REGISTER 0 MR0 (MR07–MR00) (Address (SR4–SR0) = 00H) Figure 14 shows the various operations under the control of Mode Register 0. MR0 BIT DESCRIPTION Output Standard Selection (MR00–MR01) These bits are used to select the output levels from ...

Page 13

MR07 MR07 ZERO MUST BE WRITTEN TO THIS BIT DV POLARITY MR06 0 1 Table I must be followed when programming the control signals in Async Timing Mode. Table I. Truth Table SYNC TSYNC DV 1 –> ...

Page 14

ADV7197 MODE REGISTER 2 MR1 (MR27–MR20) (Address (SR4–SR0) = 02H) Figure 17 shows the various operations under the control of Mode Register 2. MR2 BIT DESCRIPTION Y Delay (MR20–MR22) With these bits it is possible to delay the Y signal ...

Page 15

MODE REGISTER 4 MR4 (MR47–MR40) (Address (SR4–SR0) = 04H) Figure 19 shows the various operations under the control of Mode Register 4. MR4 BIT DESCRIPTION Timing Reset (MR40) Toggling MR40 from low to high and low again resets the inter- ...

Page 16

ADV7197 COLOR Y CY (CY7–CY0) (Address (SR4–SR0) = 06H) CY7 CY6 CY5 CY4 CY3 CY7–CY0 COLOR Y VALUE Figure 21. Color Y Register COLOR CR CCR (CCR7–CCR0) (Address (SR4–SR0) = 07H) CCR7 CCR6 CCR5 CCR4 CCR3 CCR7–CCR0 COLOR CR VALUE ...

Page 17

Supply Decoupling Noise on the analog power plane can be further reduced by the use of decoupling capacitors. Optimum performance is achieved by the use of 0.1 µF ceramic capacitors. Each of group vidually ...

Page 18

... Video Output Buffer and Optional Output Filter Output buffering is necessary in order to drive output devices, such as HDTV monitors. Analog Devices produces a range of suitable op amps for this application. A suitable op amp would be the AD8057. More information on line driver buffering circuits is given in the rel- evant op amp data sheets. ...

Page 19

INPUT CODE EIA-770.3, STANDARD FOR Y 940 ACTIVE 64 EIA-770.3, STANDARD FOR Pr/Pb 960 ACTIVE 512 64 REGISTER SETTINGS Register Settings on Power-Up Address 00hex Mode Register 0 01hex Mode Register 1 02hex Mode Register 2 03hex Mode Register 3 ...

Page 20

ADV7197 747 748 749 750 FIELD 1 1124 1125 FIELD 2 561 562 VERTICAL BLANKING INTERVAL VERTICAL BLANKING INTERVAL VERTICAL BLANKING INTERVAL 563 564 565 566 ...

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