TDF8771A中文资料

4
8 5 to 3
4
MSB DECODER
RESISTOR STRING
44
RED analog output
GREEN digital inputs (bits G0 to G3)
4
20 to 17 4
LSB DECODER
GREEN digital inputs (bits G4 to G7)
4
TDF8771A
元器件交易网
Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog Converter (DAC)
SYMBOL n.c. VSSA2 VDDA4 OUTR PIN 41 42 43 44 not connected analog supply ground 2 analog supply voltage 4 RED analog output DESCRIPTION
TYP. 5.0 5.0 30 3 − ±0.3 ±0.15 − 200
MAX. 5.5 5.5 45 10 +85 ±1 ±0.5 − 360
Байду номын сангаас
UNIT V V mA mA °C LSB LSB MHz mW
1. Minimum and maximum data of current and power consumption are measured in worse case conditions: for minimum data, all digital inputs are at logic level 0 while for maximum data, all digital inputs are at logic level 1. ORDERING INFORMATION TYPE NUMBER TDF8771AH PACKAGE NAME QFP44 DESCRIPTION plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 × 10 × 1.75 mm VERSION SOT307-2
VSSA
VSSD
Fig.1 Block diagram.
2003 Apr 29
3
元器件交易网
Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog Converter (DAC)
16 to 13
4
MSB DECODER
RESISTOR STRING
40
GREEN analog output
BLUE digital inputs (bits B0 to B3)
4
30, 29 26, 25 4
LSB DECODER
BLUE digital inputs (bits B4 to B7)
2003 Apr 29
2
元器件交易网
Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog Converter (DAC)
BLOCK DIAGRAM
handbook, full pagewidth
PINNING SYMBOL IREF VSSA1 R7 R6 R5 VSSD1 VDDD1 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 VDDD2 VSSD2 B1 B0 CLK VDDA1 VREF n.c. VDDA2 OUTB n.c. n.c. VDDA3 OUTG 2003 Apr 29 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 analog supply ground 1 RED digital input data; bit 7 (MSB) RED digital input data; bit 6 RED digital input data; bit 5 digital supply ground 1 digital supply voltage 1 RED digital input data; bit 4 RED digital input data; bit 3 RED digital input data; bit 2 RED digital input data; bit 1 RED digital input data; bit 0 (LSB) GREEN digital input data; bit 7 (MSB) GREEN digital input data; bit 6 GREEN digital input data; bit 5 GREEN digital input data; bit 4 GREEN digital input data; bit 3 GREEN digital input data; bit 2 GREEN digital input data; bit 1 GREEN digital input data; bit 0 (LSB) BLUE digital input data; bit 7 (MSB) BLUE digital input data; bit 6 BLUE digital input data; bit 5 BLUE digital input data; bit 4 BLUE digital input data; bit 3 BLUE digital input data; bit 2 digital supply voltage 2 digital supply ground 2 BLUE digital input data; bit 1 BLUE digital input data; bit 0 (LSB) clock input analog supply voltage 1 decoupling input for reference voltage not connected analog supply voltage 2 BLUE analog output not connected not connected analog supply voltage 3 GREEN analog output 4 DESCRIPTION reference current input for output buffers
4
24 to 21
4
MSB DECODER
RESISTOR STRING
36
BLUE analog output
BANDGAP REFERENCE 34, 37, 38, 41 not connected 33 2, 42 6, 28
MGX351
reference voltage decoupling input (VREF)
Philips Semiconductors
Product specification
Triple 8-bit video Digital-to-Analog Converter (DAC)
FEATURES • 8-bit resolution • Sampling rate up to 35 MHz • Internal reference voltage regulator • No deglitching circuit required • Large output voltage range • 1 kΩ output load • Power dissipation only 200 mW • Single 5 V power supply • 44-pin QFP package • Operating ambient temperature from −40 to +85 °C. APPLICATIONS • General purpose high-speed digital-to-analog conversion • Digital TV • Graphic display • Desktop video processing. QUICK REFERENCE DATA SYMBOL VDDA VDDD IDDA IDDD Tamb INL DNL fclk(max) Ptot Note PARAMETER analog supply voltage digital supply voltage analog supply current digital supply current operating ambient temperature integral non-linearity differential non-linearity maximum clock frequency total power dissipation RL = 1 kΩ; fclk = 35 MHz; note 1 fclk = 35 MHz; ramp input fclk = 35 MHz; ramp input RL = 1 kΩ; note 1 fclk = 35 MHz CONDITIONS MIN. 4.5 4.5 10 − −40 − − 35 45 GENERAL DESCRIPTION
34 n.c.
33 VREF 32 VDDA1 31 CLK 30 B0 29 B1
TDF8771A
The TDF8771A is a triple 8-bit video Digital-to-Analog Converter (DAC). It converts the digital input signals into analog voltage outputs at a maximum conversion rate of 35 MHz. The DACs are based on resistor-string architecture with integrated output buffers. The output voltage range is determined by a built-in reference source. The device is fabricated in a 5 V, CMOS process that ensures high functionality with low power dissipation.