參數(shù)資料
型號(hào): AD720
廠商: Analog Devices, Inc.
英文描述: RGB to NTSC/PAL Encoders(RGB-NTSC/PAL 編碼器)
中文描述: RGB到的NTSC / PAL編碼器(RGB-NTSC/PAL編碼器)
文件頁(yè)數(shù): 2/8頁(yè)
文件大?。?/td> 146K
代理商: AD720
REV. 0
–2–
Parameter
Conditions
Min
T yp
Max
Unit
SIGNAL INPUT S (RDIN, GRIN, BLIN)
Input Amplitude
NT SC
PAL
714
700
mV
mV
Input Resistances
1
RDIN with Respect to AGND
GRIN with Respect to AGND
BLIN with Respect to AGND
Input Capacitance
2.3
4.2
4.2
5
k
k
k
pF
LOGIC INPUT S (C-SYNC, 4FSC, ENCD, NT SC)
Logic LO Input Voltage
Logic HI Input Voltage
Logic LO Input Current (DC)
Logic HI Input Current (DC)
1
V
V
μ
A
μ
A
4
<1
<1
BYPASS AMPLIFIERS (AD721 Only)
Gain Error
Small Signal –3 dB Bandwidth
Output Offset Voltage (Active State)
Output Voltage (Inactive State)
Nominal Gain of
×
2
2
–5
100
–50
–50
+5
%
MHz
mV
mV
+50
+50
VIDEO OUT PUT S
3
(LUMA, CRMA, CMPS)
Luminance (LUMA) Output
Bandwidth
Gain Error
Linearity
Sync Level
5
±
1
±
0.1
286
300
MHz
%
%
mV
mV
–5
+5
NT SC
PAL
252
320
Chrominance (CRMA) Output
Bandwidth
NT SC
PAL
NT SC
PAL
3.6
4.4
286
300
±
5
±
3
–170
MHz
MHz
mV p-p
mV p-p
%
Degrees
ns
Color Burst Amplitude
257
315
Absolute Gain Error
Absolute Phase Error
Chroma/Luma T ime Alignment
4
Composite Output
Absolute Gain Error
Differential Gain
Differential Phase
Output Offset Voltage
Chroma Feedthrough
–15
+15
NT SC
–5
±
1
0.1
0.1
50
20
+5
%
%
Degrees
mV
mV p-p
With Respect to Chroma Channel
With Respect to Chroma Channel
Chroma, Luma, or Composite Outputs
Monochrome Input
100
55
POWER SUPPLIES (APOS, DPOS, VNEG)
Recommended Supply Range
Full Output Current
5
Dual Supply
–5 V Supply
+5 V Supply
–5 V Supply
+5 V Supply
–5 V Supply
+5 V Supply
±
4.75
±
5.25
V
mA
mA
mA
mA
mA
mA
35
67
20
20
14
14
Zero Signal Quiescent Current
10
10
35
35
20
20
Bypass Mode Quiescent Current
(AD721 Only)
AD720/AD721–SPECIFICATIONS
NOT ES
1
Input scaling resistors provide best scaling accuracy when source resistance is 37.5
(75
reverse-terminated input).
2
Required for driving a 75
double reverse terminated load.
3
All outputs are measured at a reverse-terminated load; voltages at IC pins are twice those specified here.
4
T his is a predistortion (per FCC specifications) that compensates for the chroma/luma delay in the low-pass filter that separates the luminance and chrominance
signals in a television receiver.
5
CRMA, LUMA, and CMPS outputs are all connected to 75
reverse-terminated loads; full-white signal for entire field.
Specifications shown in
boldface
are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min
and max specifications are guaranteed, although only those shown in
boldface
are tested on all production units.
Specifications subject to change without notice.
(T
A
= +25
°
C and supplies =
±
5V unless otherwse noted)
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