TDA8775 Datasheet, PDF (2/16 Pages) NXP Semiconductors – Triple 10-bit video Digital-to-Analog Converter DAC

Philips Semiconductors
Triple 10-bit video Digital-to-Analog
Converter (DAC)
Preliminary specification
TDA8775
FEATURES
• 10-bit resolution
• Sampling rate up to:
– 50 MHz for normal mode; R_L = 37.5 Ω
– 35 MHz for LOW power mode; R_L = 150 Ω
• Internal current reference
• Current reference selector for:
– normal mode, R_L = 37.5 Ω (typ.)
– low-power mode, R_L = 150 Ω (typ.)
• No deglitching circuit required
• SYNC and BLANK control inputs
• 0.66 V output voltage range on red and blue channels
• 1 V output voltage range on green channel
(including sync)
• BLANK control input on the 3 channels
• + 5 V power supply.
APPLICATIONS
• General purpose high-speed digital-to-analog
conversion
• Digital TV
• Graphic display
• Desktop video processing.
GENERAL DESCRIPTION
The TDA8775 consists of three 10-bit video
Digital-to-Analog Converters (DACs). They convert the
digital input signals into current outputs at a maximum
conversion rate of 50 MHz.
The DACs are based on current source architecture with
selectable current reference.
The devices are fabricated in a 5 V CMOS process that
ensures high functionality with low power dissipation.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
V_DDA
V_DDD
I_DDA
analog supply voltage
digital supply voltage
analog supply current
I_DDD
digital supply current
INL
DNL
f_clk(max)
DC integral non-linearity
DC differential non-linearity
maximum clock frequency
P_tot
total power dissipation
CONDITIONS
SLT = 1; R_L = 37.5 Ω
SLT = 0; R_L = 150 Ω
SLT = 1; R_L = 37.5 Ω
SLT = 0; R_L = 150 Ω
SLT = 1; R_L = 37.5 Ω
SLT = 0; R_L = 150 Ω
SLT = 1; R_L = 37.5 Ω;
f_clk = 50 MHz
SLT = 0; R_L = 150 Ω;
f_clk = 35 MHz
MIN.
4.5
4.5
−
−
−
−
−
−
50
35
−
TYP.
5.0
5.0
67
16
15
10
±1
±0.7
−
−
410
MAX.
5.5
5.5
tbf
tbf
tbf
tbf
±2
±1.0
−
−
tbf
UNIT
V
V
mA
mA
mA
mA
LSB
LSB
MHz
MHz
mW
−
130
tbf
mW
ORDERING INFORMATION
TYPE
NUMBER
TDA8775G
NAME
LQFP48
PACKAGE
DESCRIPTION
plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm
VERSION
SOT313-2
1996 Aug 14
2