Austin Semiconductor, Inc.
14 Bit, 800ksps Sampling
A/D Converter with Shutdown
FEATURES
•
Sample Rate: 800ksps
AS1419
AS1419A
PIN ASSIGNMENT
(Top View)
28-Pin Flat Pack (F)
ADC
• Power Dissipation: 150mW
• 81.5dB S/(N+D) and 93dB THD
• No Missing Codes
•
No Pipeline Delay
•
Nap and Sleep Shutdown Modes
•
Operates with 2.5V Internal 15ppm/°C Reference or
External Reference
•
True Differential Inputs Reject Common Mode Noise
•
20MHz Full-Power Bandwidth Sampling
•
Bipolar Input Range: ±2.5V
•
28-pin LCC and Flatpack packages
+A
IN
-A
IN
V
REF
REFcomp
A
GND
D13
D12
D11
D10
D9
D8
D7
D6
D
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AV
DD
DV
DD
V
SS
BUSY\
CS\
CONVST\
RD\
SHDN\
D0
D1
D2
D3
D4
D5
OPTIONS
•
Package(s)
28-Pin Flat-pack
28-Pin LCC
MARKING
28-Pin LCC (ECA)
F
ECA
A
GND
D13
D12
D11
D10
D9
D8
REFcomp
V
REF
-A
IN
+A
IN
AV
DD
DV
DD
V
SS
•
Operating Temperature Ranges
Extended Temperature (-55
o
C to +125
o
C)
XT
Industrial Temperature (-40°C to +85°C)
IT
Military Processing (-55°C to +125°C)
MIL
o
o
Space Processing (-55 C to +125 C)
SPACE*
*As defined by individual customer Source Control
Drawing (SCD)
4 3 2
28 27 26
5
25
1
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
D2
D3
D4
D5
D
GND
D6
D7
BUSY\
CS\
CONVST\
RD\
SHDN\
D0
D1
GENERAL DESCRIPTION
The AS1419 is a 1μs, 800ksps, 14-bit sampling A/D
converter that draws only 150mW from ±5V supplies. This
easy-to-use device includes a high dynamic range sample-and-
hold and a precision reference. Two digitally selectable power
shutdown modes provide flexibility for low power systems.
The AS1419 has a full-scale input range of ±2.5V.
Outstanding AC performance includes 81.5dB S/(N + D) and
93dB THD with a 100kHz input; 80dB S/(N + D) and 86dB THD
at the Nyquist input frequency of 400kHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 20MHz
bandwidth. The 60dB common mode rejection allows users to
eliminate ground loops and common mode noise by measuring
signals differentially from the source.
The ADC has a microprocessor compatible, 14-bit parallel
output port. There is no pipeline delay in the conversion
results. A separate convert start input and data ready signal
(BUSY\) ease connections to FIFOs, DSPs and
microprocessors.
AS1419 & AS1419A
Rev. 1.5 08/09
Typical applications are telecommunications, digital
signal processing, multiplexed data acquisition systems, high
speed data acquisitions, spectrum analysis, and imaging
systems.
For more products and information
please visit our web site at
www.austinsemiconductor.com
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
1
Austin Semiconductor, Inc.
ABSOLUTE MAXIMUM RATINGS
*
AV
DD
= V
DD
= DV
DD1,2
Supply Voltage (V
DD
)........................................................................6V
Negative Supply Voltage (V
SS
)....................................................-6V
Total Supply Voltage (V
DD
to V
SS
)................................................12V
Analog Input Voltage
3
...........................(V
SS
- 0.3V) to (V
DD
+ 0.3V)
Digital Input Voltage
4
...........................................(V
SS
- 0.3V) to 10V
Digital Output Voltage...........................(V
SS
- 0.3V) to (V
DD
+ 0.3V)
Power Dissipation....................................................................500mW
Operating Temperature Range
Military........................................................-55°C to +125°C
Industrial.......................................................-40°C to +85°C
Storage Temperature Range .....................................-65°C to +150°C
Lead Temperature (soldering, 10s) .........................................+300°C
AS1419
AS1419A
ADC
*Stresses at or greater than those listed under "Absolute
Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional operation of
the device at these or any other conditions above those
indicated in the operation section of this specification is not
implied. Exposure to absolute maximum rating conditions for
extended periods will affect reliability.
CONVERTER CHARACTERISTICS
(* denotes specifications which apply
over the full operating temperature range, otherwise specifications are T
A
=
+25°C. With Internal Reference
5,6
)
PARAMETER
Resolution (No Missing Codes)
Integral Linearity Error
Differential Linearity Error
Offset Error
8
7
CONDITIONS
*
*
*
*
Internal Reference
External Reference = 2.5V
I
OUT(REF)
= 0
AS1419
AS1419A
MIN TYP MAX MIN TYP MAX UNITS
13
14
Bits
±0.8 ±2
±0.6 ±1.25 LSB
±0.7 ±1.5
±5 ±20
±10
±5
±15
±60
±0.5
±5
±10
±5
±15
±1
±20
±60
LSB
LSB
LSB
LSB
ppm/°C
Full-Scale Error
Full Scale Tempco
ANALOG INPUT
(* denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= +25°C.
5
)
PARAMETER
Analog Input Range
9
CONDITIONS
4.75V < V
DD
< 5.25V, -5.25V < V
SS
< -4.75V *
CS\ = HIGH
Between Conversions
*
SYM
V
IN
I
IN
C
IN
C
IN
*
t
ACQ
t
AP
t
jitter
MIN TYP MAX UNITS
±2.5
±1
15
5
90
-1.5
2
60
300
V
µA
pF
pF
ns
ns
ps
RMS
dB
Analog Input Leakage Current
Analog Input Capacitance
During Conversions
Sample-and-Hold Acquisition Time
Sample-and-Hold Aperture Delay Time
Sample-and-Hold Aperture Delay Time Jitter
Analog Input Common Mode Rejection Ratio
AS1419 & AS1419A
Rev. 1.5 08/09
-2.5V < (-A
IN
= A
IN
) < 2.5V
CMRR
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
2
Austin Semiconductor, Inc.
AS1419
AS1419A
ADC
DYNAMIC ACCURACY
(* denotes specifications which apply over the full
operating temperature range, otherwise specifications are T
A
= +25°C.)
5
CONDITIONS
100kHz Input Signal
Signal-to(Noise + Distortion) Ratio
390 kHz Input Signal
100kHz Input Signal, First 5 Harmonics
Total Harmonic Distortion
390 kHz Input Signal, First 5 Harmonics
Spurious Free Dynamic Range
100KHz Input Signal
PARAMETER
Intermodulation Distortion
Full-Power Bandwidth
Full-Linear Bandwidth
f
IN1
= 29.37kHz, f
IN2
= 32.446kHz
S/(N + D) > 77dB
SYM
MIN TYP MAX -40
* S/(N + D) 78 81.5
75
* S/(N + D)
80.0
*
THD
-93 -86 -78
*
THD
-86
*
SFDR
-95 -86 -80
IMD
-86
20
1
-55 UNITS
75
dB
dB
-75
dB
dB
-79
dB
dB
MHz
MHz
INTERNAL REFERENCE CHARACTERISTICS
5
PARAMETER
Output Voltage
Output Tempco
Line Regulation
Output Resistance
Output Voltage
CONDITIONS
I
OUT
= 0
I
OUT
= 0
4.75V < V
DD
< 5.25V, -5.25V < V
SS
< -4.75V
-0.1mA < | I
OUT
| < 0.1mA
I
OUT
= 0
SYM
V
REF
V
REF
V
REF
V
REF
REFcomp
MIN
TYP MAX UNITS
V
ppm/°C
LSB/V
kΩ
V
2.480 2.500 2.520
±15
0.05
2
4.06
DIGITAL INPUTS AND DIGITAL OUTPUTS
(* denotes specifications which
apply over the full operating temperature range, otherwise specifications are
T
A
= +25°C.)
5
PARAMETER
High Level Input Voltage
Low Level Input Voltage
Digital Input Current
Digital Input Capacitance
V
DD
= 4.75V
High Level Output Voltage
I
O
= -10µA
I
O
= -200µA
V
DD
= 4.75V
Low Level Output Voltage
I
O
= 160µA
I
O
= 1.6mA
High-Z Output Leakage D13 to D0
High-Z Output Capacitance D13 to D0
Output Source Current
Output Sink Current
AS1419 & AS1419A
Rev. 1.5 08/09
CONDITIONS
V
DD
= 5.25V
V
DD
= 4.75V
V
IN
= 0V to V
DD
*
*
*
SYM
V
IH
V
IL
I
IN
C
IN
MIN
2.4
TYP
MAX
UNITS
V
0.8
±10
5
V
µA
pF
V
OH
*
4.0
4.5
V
V
V
OL
*
*
*
I
OZ
C
OZ
I
SOURCE
I
SINK
0.05
0.10
0.4
±10
15
-10
10
V
V
µA
pF
mA
mA
V
OUT
= 0V to V
DD
, CS\ High
CS\ High
9
V
OUT
= 0V
V
OUT
= V
DD
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
3
Austin Semiconductor, Inc.
operating temperature range, otherwise specifications are
T
A
= +25°C.)
5
PARAMETER
Positive Supply Voltage
10
10
AS1419
AS1419A
ADC
POWER REQUIREMENTS
(* denotes specifications which apply over the full
CONDITIONS
SYM
V
DD
V
SS
*
MIN TYP MAX
4.75
4.75
11
1.5
250
19
100
1
150
7.5
1.2
5.25
-5.25
20
UNITS
V
V
mA
mA
µA
mA
mA
µA
mW
mW
mW
Negative Supply Voltage
Positive Supply Current
Nap Mode: SHDN\ = 0V, CS\ = 0V
Sleep Mode: SHDN\ = 0V, CS\ = 5V
*
Nap Mode: SHDN\ = 0V, CS\ = 0V
Sleep Mode: SHDN\ = 0V, CS\ = 5V
*
Nap Mode: SHDN\ = 0V, CS\ = 0V
Sleep Mode: SHDN\ = 0V, CS\ = 5V
I
DD
30
Negative Supply Current
I
SS
Power Dissipation
P
DIS
240
12
TIMING CHARACTERISTICS
(* denotes specifications which apply over the
full operating temperature range, otherwise specifications are
T
A
= +25°C.)
5
PARAMETER
Maximum Sampling Frequency
Conversion Time
Acquisition Time
Acquisition + Conversion Time
CS\ to RD\ Setup Time
CS\
CS\
to CONVST\
to SHDN\
to CONVST\
10, 11
CONDITIONS
*
*
*
*
*
9,10
SYM
f
SAMPLE(MAX)
t
CONV
t
ACQ
t
ACQ + CONV
t
1
t
2
t
3
t
4
*
t
5
t
6
t
7
t
8
t
9
MIN
800
TYP
950
90
1040
MAX UNITS
kHz
1150
300
1250
ns
ns
ns
ns
ns
ns
9,10
0
40
40
400
40
20
50
20
15
40
5
15
25
35
35
50
20
30
35
50
Setup Time
Setup Time
*
10
9,10
SHDN\
Wake up Time
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CONVST\ Low Time
CONVST\ to BUSY\ Delay
Data Ready Before BUSY\
Delay Between Conversions
10
Wait Time RD\
After BUSY\
9
C
L
=25pF
*
*
*
*
C
L
=25pF
*
C
L
=100pF
*
Data Access Time After RD\
t
10
20
10
Bus Relinquish Time
RD\ Low Time
CONVST\ High Time
40 C T
A
< 85 C
o
o
o
o
*
*
*
t
11
t
12
t
13
t
10
40
55 C T
A
< 125 C *
AS1419 & AS1419A
Rev. 1.5 08/09
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
4
Austin Semiconductor, Inc.
NOTES:
AS1419
AS1419A
ADC
1. Absolute Maximum Ratings are those values beyond which
the life of a device may be impaired.
2. All voltage values are with respect to ground with DGND and
AGND wired together unless otherwise noted.
3. When these pin voltages are taken below V
SS
or above V
DD
,
they will be clamped by internal diodes. This product can handle
input currents greater than 100mA below V
SS
or above V
DD
without latchup.
4. When these pin voltages are taken below V
SS
, they will be
clamped by internal diodes. This product can handle input
currents greater than 100mA below V
SS
without latchup. These
pins are not clamped to V
DD
.
5. V
DD
= 5V, V
SS
= –5V, f
SAMPLE
= 800kHz, t
r
= t
f
= 5ns unless
otherwise specified.
6. Linearity, offset and full-scale specifications apply for a single
ended +A
IN
input with – A
IN
grounded.
7. Integral nonlinearity is defined as the deviation of a code
from a straight line passing through the actual endpoints of the
transfer curve. The deviation is measured from the center of
the quantization band.
8. Bipolar offset is the offset voltage measured from –0.5LSB
when the output code flickers between 0000 0000 0000 00 and
1111 1111 1111 11.
9. Guaranteed by design, not subject to test.
10. Recommended operating conditions.
11. The falling edge of CONVST\ starts a conversion. If
CONVST\ returns high at a critical point during the conversion
it can create small errors. For best performance ensure that
CONVST\ returns high either within 650ns after the start of the
conversion or after BUSY\ rises.
FUNCTIONAL BLOCK DIAGRAM
AS1419 & AS1419A
Rev. 1.5 08/09
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
5
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