AT2101
12-Bit 6MSPS A/D CONVERTER
Features
˙Resolution:
12-Bit
±
0.5 LSB(DNL)
˙Maximum
Conversion Rate: 6 MSPS
˙Built-in
Sample and Hold Function
˙Built-in
Reference Voltage
˙Single
+5.0 V Power Supply
˙Three-State
TTL Compatible Output
˙No
Missing Code
General Description
The AT2101 is a pipeline CMOS analog-to-
digital converter with modified coding algorithm
and capable of digitizing full-scale analog input
signals into 12-bit digital words at sample rate of
6 MSPS.
This high performance converter includes a 12-
bit quantizer, high bandwidth sample/hold, and
an internal reference, which eliminates the need
for external reference circuitry. The AT2101
employs digital error correction techniques to
provide excellent differential linearity for
imaging applications.
The AT2101 operates from a single +5.0V power
supply. All digital inputs are CMOS compatible
and the tri-state outputs are TTL-compatible. The
AT2101 is ideal for most video and image
processing applications that require low power
dissipation and low cost.
Applications
˙Video
Digitizing
˙Personal
Computer Video
˙Multimedia
˙Digital
Television
Block Diagram
CLK
DVDD
Timing Circuitry
VIN
S/H
12-Bit
Pipelined
A/D Core
VRT
3.5V
VRB
1.5V
Modified
Coding
algorithm
3-State
Output
D0
.
.
D11
Internal Reference Generator
AVDD
VCM
AGND
/OE
DGND
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
AT2101
12-Bit 6MSPS A/D CONVERTER
Pin Configuration
AT2101 (28-Pin 300 mil SOP)
DGND
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
1
2
3
4
5
6
7
8
9
10
11
28
27
26
25
24
23
22
21
20
19
18
17
16
15
NC
VIN
VCM
NC
AVDD
AVDD
NC
NC
AGND
AGND
NC
NC
DVDD
/OE
CLK
12
D10
13
D11
14
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
AT2101
12-Bit 6MSPS A/D CONVERTER
Pin Description
PIN
NAME FUNCTION
PIN
NAME FUNCTION
16
DV
DD
Digital +5V Supply
23
24
19
20
13
14
AV
DD
Analog +5V Supply
1
DGND Digital GND
AGND Analog GND
2~11
D0~D9
Digital Output Data
D0 (LSB) ~D9
Output Enable Control
D10
D11
Digital Output Data
D11 (MSB)
15
OE
D0~D11 Output Enabled
When OE = Low
D0~D11 at High Impedance
When OE= High
26
VCM
Common-Mode Voltage
Output
12
17,18
21,22
25,28
CLK
Clock Input
27
VIN
Analog Input
NC
Absolute Maximum Ratings (Beyond which damage may occur) 25
0
C
Supply Voltages
V
DD
…………………………………………...-0.5 to +7.0 V
Input Voltages
Analog Input ………………………………...AGND to V
DD
Reference Input Voltage …………………...AGND to V
DD
ESD Susceptibility ………………………………± 1,500V
Temperature
Operating Temperature …………..…………-20 to +70
0
C
Junction Temperature ………………………………175
0
C
Lead Temperature, (Soldering 10 seconds) ……..300
0
C
Storage Temperature …………………...…-55 to +125
0
C
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
AT2101
12-Bit 6MSPS A/D CONVERTER
Electrical Specifications
T
a
=+25
0
C, AV
DD
=DV
DD
=+5.0V, AGND=DGND=0.0V, V
RB
=1V and V
RT
=3V, unless otherwise specified.
PARAMETERS
Resolution
DC Accuracy (+25
0
C)
Integral Nonlinearity
Differential Nonlinearity
No Missing Codes
Zero Error(+25
0
C)
Gain Error(+25
0
C)
Analog Input
Input Voltage Range
Common-Mode Voltage
Input Bias Current
Sample-Hold Input Bandwidth
Input Resistance
Input Capacitance
Dynamic Performance
Signal-to-Noise Ratio
fin=500KHz
fin=1MHz
Spurious Free Dynamic Range
fin=500KHz
fin=1MHz
Timing Characteristics
Output Data Delay (td)
Output Data Delay (tdsl)
Data Valid Time
Sampling Time Offset
Digital Inputs
Input Current, Logic High
Input Current, Logic Low
Pulse Width High (CLK)
Pulse Width Low (CLK)
Voltage, Logic High
Voltage, Logic Low
Digital Outputs
Output Current, Logic High
Output Current, Logic Low
Voltage, Logic High
Voltage, Logic Low
Power Supply Requirements
AV
DD
(Analog Supply Voltage)
DV
DD
(Digital Supply Voltage)
Supply Voltage Difference
Supply Current
Power Dissipation
TEST CONDICTION
MIN
12
TYP
MAX UNITS
Bits
LSB
LSB
%FSR
%FSR
V
V
µA
MHz
KΩ
pF
dB
dB
dB
dB
30
100
100
10
100
10
ns
ns
ns
ns
μA
μA
ns
ns
V
V
mA
mA
V
V
V
V
V
mA
mW
±
1.5
±
0.5
Guaranteed
±
7.5
±
1.25
1.5
-3dBFS
2.5
5
100
50
10
3.5
Referred to Full Scale
59
54
Referred to Full Scale
58
(High ‘Z’)
Tri-state circuit
5
V
DD
=5.25V, V
IH
=V
DD
V
DD
=5.25V, V
IL
=DGND
68
66
18
83
83
4.0
1.0
V
DD
=min V
OH
=4.25V
V
DD
=min V
OL
=0.4V
-1.1
3.7
4.0
0.4
+4.75
+4.75
-0.1
+5.0
+5.0
0.0
65
325
+5.25
+5.25
0.1
(AV
DD
-DV
DD
)
fs=6MSPS
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
AT2101
12-Bit 6MSPS A/D CONVERTER
Timing Specifications
Operating characteristic at V
DD
=5V, V
RT
=3.0V, V
RB
=1.0V, f
(CLK)
=20MHz, T
A
=25
0
C (unless otherwise noted)
PARAMETERS
f
CONV
Maximum conversion rate
t
d
Sampling delay time
t
AJ
Aperture jitter time
tw(H) Clock pulse High
tw(L) Clock Pulse Low
t
1
Data Hold time
t
2
New Data delay time
TEST CONDICTION
MIN
6
83
83
TYP
4
30
MAX
C
L
=10pF
C
L
=10pF
15
20
UNITS
MSPS
ns
ps
ns
ns
ns
ns
tw(H)
tw(L)
Clock
N
td
N+1
N+2
N+3
N+4
t2
Analog
input
N+7
N+5
N+6
Data
Output
N-7
Data
Invalid
N-6
N-5
N-4
N-3
t1
N-2
N-1
N
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
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