TDA8771A Просмотр технического описания (PDF) - Philips Electronics
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TDA8771A Datasheet PDF : 20 Pages
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Philips Semiconductors
Triple 8-bit video Digital-to-Analog
Converter (DAC)
Product specification
TDA8771A
CHARACTERISTICS
VDDA = VDDD = 4.5 to 5.5 V; VSSA and VSSD shorted together; VDDA − VDDD = −0.5 to +0.5 V; Tamb = 0 to 70 °C;
typical values measured at VDDA = VDDD = 5 V and Tamb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VDDA
VDDD
IDDA
IDDD
Inputs
analog supply voltage
digital supply voltage
analog supply current
digital supply current
4.5
5.0
5.5
V
4.5
5.0
5.5
V
RL = 1 kΩ; note 1
10
33
45
mA
fclk = 35 MHz
−
7
20
mA
CLOCK INPUT (PIN 31)
VIL
LOW level input voltage
0
VIH
HIGH level input voltage
2.0
R, G, B DIGITAL INPUTS (PINS 12 TO 8, 5 TO 3, 20 TO 13, 30, 29 AND 26 TO 21)
VIL
LOW level input voltage
0
VIH
HIGH level input voltage
2.0
IREF REFERENCE CURRENT INPUT FOR OUTPUT BUFFERS (PIN 1)
II
input current
−
Timing; see Fig.3
fclk(max)
maximum clock frequency
35
tCPH
clock pulse width HIGH
8
tCPL
clock pulse width LOW
8
tr
clock rise time
−
tf
clock fall time
−
tSU;DAT
input data set-up time
4
tHD;DAT
input data hold time
4
Voltage reference (pin 33, referenced to VSSA)
VREF
output reference voltage
1.180
Outputs
−
−
−
−
0.6
−
−
−
−
−
−
−
1.242
1.2
VDDD
1.2
VDDD
0.7
−
−
−
5
6
−
−
1.305
V
V
V
V
mA
MHz
ns
ns
ns
ns
ns
ns
V
OUTB, OUTR, OUTG ANALOG OUTPUTS (PINS 36, 44 AND 40, REFERENCED TO VSSA) FOR 1 kΩ LOAD; see Table 1
FSR
full-scale output voltage range
2.80
2.95
3.10
V
Vos
offset of analog voltage output
−
0.25
−
V
VOmax
maximum output voltage
data inputs = logic 1; 2.95
3.20
3.45
V
note 2
VOmin
minimum output voltage
data inputs = logic 0; 0.05
0.25
0.45
V
note 2
THD
ZL
total harmonic distortion
output load impedance
fi = 4.43 MHz;
fclk = 35 MHz
−
−44
−
dB
0.9
1.0
1.1
kΩ
1996 Jan 25
7
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