AT1175 - Aimtron Technology

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

1

Features

˙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

Applications

˙Video Digitizing

˙Personal Computer Video

˙Multimedia

˙Digital Television

General Description

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 o

f

20 MSPS.

For most application, no external sample-and-

hold 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 TTL-

compatible. 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.

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

2

Pin Configuration

Ordering Information

Part number. Package Marking

AT1175S SOP24( 300 mil) AT1175S

AT1175S_GRE SOP24(300 mil),Green AT1175S, date code with one bottom line

Pin Description

PIN NAME FUNCTION PIN NAME FUNCTION

1

OE

Output Enable Control

D0~D7 Enabled When OE =

Low

D0~D7 at Tri-state When OE

= High

14

15

18

AV DD Analog +5V Supply

2,24 DGND Digital GND 23 VRB Reference Voltage (Bottom)

3~10 D0~D7 Digital Output Data

D0 (LSB), D7(MSB) 17 VRT Reference Voltage (Top)

11,13 DVDD Digital +5V Supply 19 VIN Analog Input

12 CLK Clock Input 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

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

3

Absolute Maximum Ratings (Beyond which damage may occur) 250C

Supply Voltages

VDD …………………………………………...-0.5 to +7.0 V

Input Voltages

Analog Input ………………………………...AGND to VDD

Reference Input Voltage ………………….…AGND to VDD

ESD Susceptibility ………………………………±1,500V

Temperature

Operating Temperature …………..…………-20 to +700C

Junction Temperature ………………………………1750C

Lead Temperature, (Soldering 10 seconds) ………..3000C

Storage Temperature …………………...….-55 to +1250C

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 TEST CONDICTION MIN TYP MAX UNITS

Resolution 8 Bits

DC Accuracy (+250C)

Integral Nonlinearity

Differential Nonlinearity

Zero Scale Error

Full Scale Error

No Missing Codes

fs=20 MSPS,

V

IN =1.0V to 3.0V

EZS

EFS

±0.8

±0.5

-10 -35 -60

0 45 60

Guaranteed

LSB

mV

Analog Input

Input Voltage Range

Input Bias Current

Input Resistance

Input Capacitance

V

IN V

RB V

RT

±5.0

100 200

15

V

μA

kΩ

pF

Reference Input

Reference Ladder Resistance

Reference Current

Reference Input Voltage

Reference Differential

Internal Bias1

Internal Bias2 (VRT)

V

RT to VRB

V

RT - VRB =2.0V

V

RB

V

RT

V

RT - VRB

V

RB

V

RT –VRB

Short VRT and VRTS

Short VRB and VRBS

Short VRT and VRTS

Short VRB and AGND

200 270 340

5.2 7.5 10.5

0.0 0.6 3.0

2.0 2.6 VDD

1.0 - 5.0

0.55 0.60 0.65

1.9 2.0 2.1

2.25 2.39 2.53

Ω

mA

V

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

fs=14.29 MSPS

NTSC 40 IRE Mod Ramp

fs=14.3 MSPS

44 46

43

43 48

41 42

0.7

1.0

dB

Degrees

%

Digital Inputs

Voltage, Logic High 4.0 VDD V

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

4

Voltage, Logic Low

Input Current, Logic High

Input Current, Logic Low

V

DD=max, VIH=VDD

V

DD=max, VIL=DGND

0 1.0

5.0

V

μA

Digital Outputs

Output Current, Logic High

Output Current, Logic Low

Output Current, High ‘Z’

Voltage , Logic High

Voltage , Logic Low

V

DD=min VOH=4.25V

V

DD=min VOL=0.4V

V

DD=max /OE=VDD

I

OH =-4mA

I

OL =4mA

- 1.1

2.0

±1

3.5

0.8

mA

μA

V

Power Supply Requirements

AV DD (Analog Supply Voltage)

DVDD (Digital Supply Voltage)

Supply Voltage Difference

Supply Current

Power Dissipation

(AVDD-DVDD)

fs=20 MSPS(Does not

include ref. current)

NTSC ramp wave input

+4.75 +5.0 +5.25

-0.1 0.0 0.1

30

150

V

mA

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 TEST CONDICTION MIN TYP MAX UNITS

fS Maximum conversion rate fin=1kHz ramp 20 MSPS

tW(H) Pulse Width High 15 ns

tW(L) Pulse Width Low 15 ns

td(D) Digital output delay time CL≦10pF 18 30 ns

tAJ Aperture jitter time 30 ps

td(S) Sampling delay time 4 ns

ten Output Enable time CL=10pF 5 ns

tdis Output Disable time CL=10pF 7 ns

N+5

N+4

N+3

N+2

N+1

N

tw(H) tw(L)

td(s)

N-3 N-2 N-1 N N+2

Analog

input

Clock

Data

Output

td(D)

OE

tdis ten

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

5

Digital Output Code

Input Signal Voltage Step

Digital output code

MSB LSB

VRT

.

VRB

0

.

127

128

.

254

255

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

AT1175

Preliminary Product Information

8-Bit 20MSPS CMOS VIDEO A/D CONVERTER

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: service@aimtron.com.tw

6

Package Outline (24-pin 300 mil Plastic SOP)

DIMENSIONS IN

MILLIMETERS

DIMENSIONS IN INCHESSYMBOLS

MIN NOM MAX MIN NOM MAX

A 2.36 2.49 2.64 0.093 0.098 0.104

A1 0.10 - 0.30 0.004 - 0.012

A2 - 2.34 - - 0.092 -

B 0.33 0.41 0.51 0.013 0.016 0.020

C 0.23 0.25 0.33 0.009 0.010 0.012

D 15.19 15.39 15.49 0.598 0.606 0.610

E 7.39 7.49 7.59 0.291 0.295 0.299

e - 1.27 - - 0.050 -

H 10.01 10.31 10.64 0.394 0.406 0.419

L 0.38 0.81 1.27 0.015 0.032 0.050

y0-80-8