®
®
ADSD-1402
Dual, 14-Bit, 2MSPS Sampling A/D Converter
PRODUCT OVERVIEW
DATEL's ADSD-1402 is a functionally complete, dual
14-bit, 2MSPS, sampling A/D converter. Its standard,
40-pin, triple-wide ceramic DIP contains two fast-settling
sample/hold amplifiers, two 14-bit A/D converters,
multiplexed output buffers, a precision reference, and all
the timing and control logic necessary to operate from
either two or a single start convert pulse.
PIN
INPUT/OUTPUT CONNECTIONS
FUNCTION
PIN FUNCTION
FEATURES
14-bit resolution; 2MSPS sampling rate
Functionally complete; ±5V input range
missing codes over full temperature range
No
Edge-triggered; No pipeline delays
supplies, 0.6 Watts
±5V
Small, 40-pin, side-brazed, ceramic TDIP
SNR, –80dB THD
79dB
for both time and frequency
Ideal
The ADSD-1402 is optimized for wideband frequency-
domain applications and is fully FFT tested. The ADSD-
1402 requires only ±5V supplies and typically consumes
0.6 Watts. Models are available for use in commercial (0
to +70°C), industrial (–40 to +100°C), or HI-REL (–55 to
+125°C) operating temperature ranges.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
INPUT A
+5VA
ANALOG GROUND
GAIN A
OFFSET A
RANGE
2.5V REF
ANALOG GROUND
–5V
ENABLE A
START A
+5VD
BIT 14 (LSB)
BIT 13
BIT 12
BIT 11
BIT 10
BIT 9
BIT 8
DGND
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
INPUT B
+5VA
ANALOG GROUND
GAIN B
OFFSET B
N/C
N/C
ANALOG GROUND
–5V
ENABLE B
START B
EOC
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
DGND
BLOCK DIAGRAM
Figure 1. ADSD-1402 Functional Block Diagram
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA •
Tel: (508) 339-3000
•
www.datel.com
• e-mail: help@datel.com
05 Jun 2013 MDA_ADSD-1402.C01
Page 1 of 5
®
®
ADSD-1402
Dual, 14-Bit, 2MSPS Sampling A/D Converter
UNITS
Volts
Volts
Volts
Volts
°C
DYNAMIC PERFORMANCE
Total Harm. Distort. (–0.5dB)
dc to 500kHz
500kHz to 1MHz
Signal-to-Noise Ratio (w/o distortion, –0.5dB )
dc to 500kHz
500kHz to 1MHz
Signal-to-Noise Ratio (and distortion, –0.5dB)
dc to 500kHz
500kHz to 1MHz
Spurious Free Dyn. Range
dc to 500kHz
500kHz to 1MHz
Two-tone IMD Distortion (fin = 975kHz,
fs = 2.0Mhz, –0.5dB)
Input Bandwidth (–3dB)
Small Signal (–20dB input)
Large Signal (–0.5dB input)
Slew Rate
Aperture Delay Time
Aperature Uncertainty
S/HAquisition Time (to ±0.003%FSR),step input
Conversion Rate
Feedthrough Rejection (fin = 1MHz)
Noise
POWER REQUIREMENTS
Power Supply Ranges
–5V Supply
+5V Supply
Power Supply Currents
–5V Supply
+5V Supply
Power Dissipation
Power Supply Rejection
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case
ADSD-1402MC, MC-C
ADSD-1402ME, ME-C
ADSD-1402MM, MM-C
Storage Temperature Range
Package Type
MIN.
—
—
75
75
71
69
—
—
–76
—
—
—
—
—
—
2
—
—
TYP.
–79
–73
80
80
76
73
–85
–74
—
16
12
±250
—
—
100
—
85
250
MAX.
–72
–70
—
—
—
—
–74
–70
—
—
—
—
±10
5
150
—
—
—
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
MHz
V/μs
ns
ps
ns
MHz
dB
μVrms
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
LIMITS
+5V Supply (Pins 2, 12, 39)
0 to +6
–5V Supply (Pins 9, 32)
0 to –6
Digital Inputs (Pins 3, 10, 11, 31)
–0.3 to +V
DD
+0.3
Analog Input (Pins 1, 40)
±7
Lead Temp. (10 seconds)
+300
FUNCTIONAL SPECIFICATIONS
(T
A
= +25°C, +V
DD
= +5V, Vee = –5V, 2MSPS sampling rate,Vin = ±5V and a minimum
7 minute warmup unless otherwise specified.)
ANALOG INPUTS
Input Voltage Range
Input Impedence
Input Capacitance
DIGITAL INPUTS
Logic Levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
PERFORMANCE
Integral Non-Linearity (fin = 10KHz)
+25°C
0 to +70°C
–55 to +125°C
Differential Non-Linearity (fin = 10KHz)
+25°C
0 to +70°C
–55 to +125°C
Offset Error
+25°C (see Figure 3)
0 to +70°C
–55 to +125°C
Gain Error
+25°C (see Figure 3)
0 to +70°C
–55 to +125°C
No Missing Codes (fin = 975kHz)
14 Bits
Resolution
OUTPUTS
Output Coding
Logic Level
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
Internal Reference
Voltage, +25°C
0 to +70°C
External Current
MIN.
—
—
—
TYP.
±5V
400
7
MAX.
—
—
15
UNITS
Volts
Ω
pF
+2.0
—
—
—
—
—
—
—
—
+0.8
20
20
Volts
Volts
μA
μA
—
—
—
–0.99
–0.99
–0.99
—
—
—
—
—
—
±1
±1
±2
±0.5
±0.5
±0.75
±0.25
±0.25
±0.5
±0.3
±0.3
±0.6
—
—
—
+1.5
+1.5
+1.75
±0.5
±0.5
±0.8
±0.6
±0.6
±0.8
LSB
LSB
LSB
LSB
LSB
LSB
%FSR
%FSR
%FSR
%FSR
%FSR
%FSR
–5.25
+4.75
–80
—
—
—
–5
+5.0
–70
+50
0.6
—
–4.75
+5.25
—
+70
0.75
±0.01
Volts
Volts
mA
mA
Watts
%FSR%V
MIN.
–55 to +125°C
14 Bits
TYP.
MAX.
Offset Bin.
0
—
+70
°C
–40
—
+100
°C
–55
—
+125
°C
–65
—
+150
°C
40-pin, metal-sealed, ceramic TDIP
UNITS
Footnote:
Same specification as In-Band Harmonics and Peak Harmonics.
+2.4
—
—
—
+2.45
+2.45
—
—
—
—
—
+2.5
+2.5
—
—
+0.4
4
4
+2.55
+2.55
5
Volts
Volts
μA
mA
Volts
Volts
mA
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA •
Tel: (508) 339-3000
•
www.datel.com
• e-mail: help@datel.com
05 Jun 2013 MDA_ADSD-1402.C01
Page 2 of 5
®
®
ADSD-1402
Dual, 14-Bit, 2MSPS Sampling A/D Converter
TECHNICAL NOTES
1. Rated performance requires using good high-frequency circuit board layout
techniques. Connect the digital and analog grounds to one point, the analog
ground plane beneath the converter. Due to the inductance and resistance
of the power supply return paths, return the analog and digital ground
separately to the power supplies.
INPUT
RANGE
±5V
OFFSET ADJUST
+1/2 LSB
+0.000305V
GAIN ADJUST
FS – 1½ LSB
+4.999085V
Table 2. Offset and Gain Adjustments
CALIBRATION PROCEDURE
1. Connect the converter per Figure 3. Apply a pulse of 100 nanoseconds
minimum to START CONVERT (pin 11) at a rate of 200kHz. This rate is
chosen to reduce flicker if LED's are used on the outputs for calibration
purposes.
2. Zero (Offset) Adjustments
Apply a precision voltage reference source between ANALOG INPUT A (pin
1) and SIGNAL GROUND (pin 3), then adjust the reference source output per
Table 2. Adjust trimpot R2 until the code flickers equally between 10 0000
0000 0000 and 10 0000 0000 0001.
3. Full-Scale (Gain) Adjustments
Set the output of the voltage reference used in step 2 to the value shown in
Table 2.
25 nSec. per division
N
START
CONVERT
100 nSec.
Adjust the gain trimpot R1 until the output code flickers equally between 11
1111 1111 1110 and 11 1111 1111 1111.
4. Repeat above steps for Analog Input B (Pin 40). Use trimpot R3 for the zero
(Offset) adjustment and trimpot R4 for the Full-Scale (Gain) adjustment.
5. To confirm proper operation of the device, vary the precision reference volt-
age source to obtain the output coding listed in Table 3.
N+1
400 nSec.
EOC
DATA OUT
ENABLE A
325 nSec.
175 nSec.
DATA N VALID
75 nSec.
ENABLE B
Data N A
DATA
A or B OUT
HIGH Z
75 nSec.
Data N B
HIGH Z
HIGH Z
Figure 2. ADSD-1402 Timing Diagram
OUTPUT CODING
INPUT RANGE
MSB
LSB
±5V
11 1111 1111 1111 +4.999390
11 1000 0000 0000 +4.250000
11 0000 0000 0000 +2.500000
10 0000 0000 0000 ±0.000000
01 0000 0000 0000 –2.500000
00 1000 0000 0000 –4.250000
00 0000 0000 0001 –4.999390
00 0000 0000 0000 –5.000000
BIPOLAR
SCALE
+FS – 1LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS+1LSB
–FS
Table 3. Output Coding
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA •
Tel: (508) 339-3000
•
www.datel.com
• e-mail: help@datel.com
05 Jun 2013 MDA_ADSD-1402.C01
Page 3 of 5
®
®
ADSD-1402
Dual, 14-Bit, 2MSPS Sampling A/D Converter
See timing diagram for details.
Notes:
Recommended to use same supply source for +5 Analog and +5 Digital. Try using as clean of a supply as possible (Bypass caps., 10uF and .1uF).
Outputs are enabled by either turning ENABLE A (Pin 10) or ENABLE B
(Pin 31) low for prespective analog inputs A or B. A high on ENABLE A or ENABLE B results in disabling the output bus (High Z).
Figure 3. ADSD-1402 Connection Diagram
THERMAL REQUIREMENTS
The ADSD-1402 sampling A/D converter is fully characterized and specified
over the commercial operating temperature (ambient) range of 0 to +70°C
(MC suffix) and military temperature range of –55 to +125°C (MM suffix). All
roomtemperature (TA = +25°C) production testing is performed without the
use of heat sinks or forced-air cooling. Thermal impedance figures for each
device are listed in their respective specification tables.
These devices do not normally require heat sinks, however, standard precau-
tionary design and layout procedures should be used to ensure devices do
not overheat. The ground and power planes beneath the package, as well as
all pcb signal runs to and from the device, should be as heavy as possible to
help conduct heat away from the package. Electrically insulating, thermally
conductive "pads" may be installed underneath the package. Devices should
be soldered to boards rather than "socketed," and of course, minimal air flow
over the surface can greatly help reduce the package temperature.
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA •
Tel: (508) 339-3000
•
www.datel.com
• e-mail: help@datel.com
05 Jun 2013 MDA_ADSD-1402.C01
Page 4 of 5
®
®
ADSD-1402
Dual, 14-Bit, 2MSPS Sampling A/D Converter
MECHANICAL DIMENSIONS - INCHES (mm)
2.12/2.07
(53.85/52.58)
40
21
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
Lead Material: Kovar alloy
1.11/1.08
(28.20/27.43)
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
1
20
0.100 TYP.
(2.540)
1.900 ±0.008
(48.260)
0.245 MAX.
(6.223)
PIN 1 INDEX
( ON TOP)
0.200/0.175
(5.080/4.445)
0.015/0.009
(0.381/0.229)
0.210 MAX.
(5.334)
0.018 ±0.002
(0.457)
0.045/0.035
(1.143/0.889)
0.110/0.090
(2.794/2.286)
SEATING
PLANE
0.035/0.015
(0.889/0.381)
0.900 ±0.010
(22.86)
0.110/0.090
(2.794/2.286
ORDERING INFORMATION
MODEL NUMBER
ADSD-1402MC
ADSD-1402MC-C
ADSD-1402ME
ADSD-1402ME-C
ADSD-1402MM
ADSD-1402MM-C
OPERATING
TEMP. RANGE
0 to +70°C
0 to +70°C
–40 to +100°C
–40 to +100°C
–55 to +125°C
–55 to +125°C
PACKAGE
DDIP
DDIP
DDIP
DDIP
DDIP
DDIP
ROHS
No
Yes
No
Yes
No
Yes
HS-40
ACCESSORIES
Heat Sink for all ADSD-1402 models
DATEL
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not
imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change
without notice.
© 2013
www.datel.com • e-mail: help@datel.com
05 Jun 2013 MDA_ADSD-1402.C01
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