Aimtron AT1175S 8-bit 20msps cmos video a/d converter Datasheet

AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Features
General Description
˙Resolution: 8-Bit ± 0.5 LSB(DNL)
˙Maximum Conversion Rate: 20 MSPS
˙Built-in Sample and Hold Function
˙Built-in Reference Voltage Self Bias Circuit
˙Single +5.0 V Power Supply
˙Three-State TTL Compatible Output
˙Direct Replacement for the Sony CXD1175
The AT1175 is a CMOS two-step A/D converter
capable of digitizing full-scale analog input
signals into 8-bit digital words at sample rate of
20 MSPS.
Applications
˙Video Digitizing
˙Personal Computer Video
˙Multimedia
˙Digital Television
For most application, no external sample-andhold or video driving amplifiers are needed
thanks to the device’s narrow aperture time,
wide bandwidth, and low input capacitance.
The AT1175 operates from a single +5.0V power
supply and has an internal voltage reference,
which eliminates the need for external reference
circuitry. All digital inputs are CMOS
compatible and the tri-state outputs are TTLcompatible. The AT1175 is ideal for most video
and image processing applications that require
low power dissipation and low cost.
Block Diagram
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
1
AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Pin Configuration
Ordering Information
Part number.
Package
Marking
AT1175S
AT1175S_GRE
SOP24( 300 mil)
SOP24(300 mil),Green
AT1175S
AT1175S, date code with one bottom line
Pin Description
PIN
NAME FUNCTION
Output Enable Control
1
OE
D0~D7 Enabled When OE =
Low
PIN
NAME FUNCTION
14
15
18
AVDD
Analog +5V Supply
23
VRB
Reference Voltage (Bottom)
17
VRT
Reference Voltage (Top)
VIN
Analog Input
D0~D7 at Tri-state When OE
= High
2,24
DGND Digital GND
3~10
D0~D7
11,13
DVDD Digital +5V Supply
19
12
CLK
20
21
AGND Analog GND
16
VRTS Shorted with VRT to Generate
+2.6V Reference
22
VRBS Shorted with VRB to
Generate +0.6V Reference
Digital Output Data
D0 (LSB), D7(MSB)
Clock Input
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
2
AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Absolute Maximum Ratings (Beyond which damage may occur) 250C
Supply Voltages
Temperature
VDD …………………………………………...-0.5 to +7.0 V
Operating Temperature …………..…………-20 to +700C
Input Voltages
Junction Temperature ………………………………1750C
Analog Input ………………………………...AGND to VDD
Lead Temperature, (Soldering 10 seconds) ………..3000C
Reference Input Voltage ………………….…AGND to VDD
Storage Temperature …………………...….-55 to +1250C
ESD Susceptibility ………………………………±1,500V
Electrical Specifications
Ta=+250C, AVDD=DVDD= VDD =+5.0V, AGND=DGND=0.0V, VRB=1V and VRT=3V, fs=20 MSPS ,unless otherwise specified.
PARAMETERS
Resolution
DC Accuracy (+250C)
Integral Nonlinearity
Differential Nonlinearity
Zero Scale Error
Full Scale Error
No Missing Codes
Analog Input
Input Voltage Range
Input Bias Current
Input Resistance
Input Capacitance
Reference Input
Reference Ladder Resistance
Reference Current
Reference Input Voltage
Reference Differential
Internal Bias1
Internal Bias2 (VRT)
Dynamic Performance
Signal-To-Noise Ratio
fin=1.667MHz
fin=3.85MHz
Spurious Free Dynamic Range
fin=1.667MHz
fin=3.85MHz
Differential Phase
Differential Gain
Digital Inputs
Voltage, Logic High
TEST CONDICTION
MIN
8
fs=20 MSPS,
VIN =1.0V to 3.0V
EZS
EFS
-10
0
VIN
VRB
100
VRT to VRB
VRT - VRB =2.0V
VRB
VRT
VRT - VRB
VRB
VRT –VRB
Short VRT and VRTS
Short VRB and VRBS
Short VRT and VRTS
Short VRB and AGND
TYP
MAX UNITS
Bits
±0.8
±0.5
-35
-60
45
60
Guaranteed
LSB
LSB
mV
mV
VRT
±5.0
V
μA
kΩ
pF
200
15
200
5.2
0.0
2.0
1.0
0.55
1.9
270
7.5
0.6
2.6
0.60
2.0
340
10.5
3.0
VDD
5.0
0.65
2.1
Ω
mA
V
V
V
V
V
2.25
2.39
2.53
V
44
43
46
dB
dB
43
41
48
42
0.7
1.0
dB
dB
Degrees
%
fs=14.29 MSPS
fs=14.29 MSPS
NTSC 40 IRE Mod Ramp
fs=14.3 MSPS
4.0
VDD
V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
3
AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Voltage, Logic Low
Input Current, Logic High
Input Current, Logic Low
Digital Outputs
Output Current, Logic High
Output Current, Logic Low
Output Current, High ‘Z’
Voltage , Logic High
Voltage , Logic Low
Power Supply Requirements
AVDD (Analog Supply Voltage)
DVDD (Digital Supply Voltage)
Supply Voltage Difference
Supply Current
Power Dissipation
0
VDD=max, VIH=VDD
VDD=max, VIL=DGND
VDD=min VOH=4.25V - 1.1
VDD=min VOL=0.4V
2.0
VDD=max
/OE=VDD
IOH =-4mA
3.5
IOL =4mA
(AVDD-DVDD)
fs=20 MSPS(Does not
include ref. current)
NTSC ramp wave input
+4.75
+4.75
-0.1
1.0
5.0
5.0
V
μA
μA
±1
mA
mA
μA
V
V
0.8
+5.0
+5.0
0.0
30
+5.25
+5.25
0.1
V
V
V
mA
150
mW
Timing Specifications
Ta=+250C, AVDD=DVDD= VDD =+5.0V, AGND=DGND=0.0V, VRB=1V and VRT=3V, fs=20 MSPS ,unless otherwise specified.
PARAMETERS
fS Maximum conversion rate
tW(H) Pulse Width High
tW(L) Pulse Width Low
td(D) Digital output delay time
tAJ Aperture jitter time
td(S) Sampling delay time
ten
Output Enable time
tdis Output Disable time
tw(H)
TEST CONDICTION
fin=1kHz ramp
MIN
20
15
15
CL≦10pF
CL=10pF
CL=10pF
TYP
MAX
18
30
4
5
7
30
UNITS
MSPS
ns
ns
ns
ps
ns
ns
ns
N+4
N+5
tw(L)
Clock
N
Analog
input
N+1
N+2
td(s)
N+3
td(D)
Data
Output
N-3
N-2
N-1
N
tdis
N+2
ten
OE
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
4
AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Digital Output Code
Input Signal Voltage
VRT
.
.
.
.
.
.
.
.
VRB
Step
0
.
.
.
127
128
.
.
254
255
Digital output code
MSB
LSB
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0
.
.
1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1
.
.
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
Typical Application Schematic
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
5
AT1175
Preliminary Product Information
8-Bit 20MSPS CMOS VIDEO A/D CONVERTER
Package Outline (24-pin 300 mil Plastic SOP)
SYMBOLS
A
A1
A2
B
C
D
E
e
H
L
y
DIMENSIONS IN
MILLIMETERS
MIN
NOM
MAX
2.36
2.49
2.64
0.10
0.30
2.34
0.33
0.41
0.51
0.23
0.25
0.33
15.19
15.39
15.49
7.39
7.49
7.59
1.27
10.01
10.31
10.64
0.38
0.81
1.27
0
8
DIMENSIONS IN INCHES
MIN
0.093
0.004
0.013
0.009
0.598
0.291
0.394
0.015
0
NOM
0.098
0.092
0.016
0.010
0.606
0.295
0.050
0.406
0.032
-
MAX
0.104
0.012
0.020
0.012
0.610
0.299
0.419
0.050
8
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
6
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