ADSD-1402

®
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.
The ADSD-1402 is optimized for wideband frequencydomain applications and is fully FFT tested. The ADSD1402 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.
FEATURES

14-bit resolution; 2MSPS sampling rate

Functionally complete; ±5V input range

No missing codes over full temperature range

Edge-triggered; No pipeline delays

±5V supplies, 0.6 Watts

Small, 40-pin, side-brazed, ceramic TDIP

79dB SNR, –80dB THD

Ideal for both time and frequency
PIN
INPUT/OUTPUT CONNECTIONS
FUNCTION
PIN FUNCTION
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
05 Jun 2013
•
e-mail: [email protected]
MDA_ADSD-1402.C01 Page 1 of 5
®
ADSD-1402
®
Dual, 14-Bit, 2MSPS Sampling A/D Converter
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 +VDD +0.3
Analog Input (Pins 1, 40)
±7
Lead Temp. (10 seconds)
+300
UNITS
Volts
Volts
Volts
Volts
°C
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, +VDD = +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
MIN.
—
—
—
TYP.
±5V
400
7
DATEL
UNITS
Volts
Ω
pF
+2.0
—
—
—
—
—
—
—
—
+0.8
20
20
Volts
Volts
μA
μA
—
—
—
±1
±1
±2
—
—
—
LSB
LSB
LSB
–0.99
–0.99
–0.99
±0.5
±0.5
±0.75
+1.5
+1.5
+1.75
LSB
LSB
LSB
—
—
—
±0.25
±0.25
±0.5
±0.5
±0.5
±0.8
%FSR
%FSR
%FSR
—
—
—
±0.3
±0.3
±0.6
±0.6
±0.6
±0.8
%FSR
%FSR
%FSR
–55 to +125°C
14 Bits
TYP.
MAX.
UNITS
MIN.
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
MAX.
—
—
15
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.
TYP.
MAX.
UNITS
—
—
–79
–73
–72
–70
dB
dB
75
75
80
80
—
—
dB
dB
71
69
76
73
—
—
dB
dB
—
—
–85
–74
–74
–70
dB
dB
–76
—
—
dB
—
—
—
—
—
—
2
—
—
16
12
±250
—
—
100
—
85
250
—
—
—
±10
5
150
—
—
—
MHz
MHz
V/μs
ns
ps
ns
MHz
dB
μVrms
–5.25
+4.75
–5
+5.0
–4.75
+5.25
Volts
Volts
–80
—
—
—
–70
+50
0.6
—
—
+70
0.75
±0.01
mA
mA
Watts
%FSR%V
0
—
+70
°C
–40
—
+100
°C
–55
—
+125
°C
–65
—
+150
°C
40-pin, metal-sealed, ceramic TDIP
Footnote:
 Same specification as In-Band Harmonics and Peak Harmonics.
Offset Bin.
+2.4
—
—
—
—
—
—
—
—
+0.4
4
4
Volts
Volts
μA
mA
+2.45
+2.45
—
+2.5
+2.5
—
+2.55
+2.55
5
Volts
Volts
mA
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
05 Jun 2013
•
e-mail: [email protected]
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.
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
INPUT
RANGE
OFFSET ADJUST
+1/2 LSB
GAIN ADJUST
FS – 1½ LSB
±5V
+0.000305V
+4.999085V
Table 2. Offset and Gain Adjustments
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 voltage source to obtain the output coding listed in Table 3.
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
N+1
START
CONVERT
400 nSec.
100 nSec.
325 nSec.
EOC
175 nSec.
DATA OUT
DATA N VALID
ENABLE A
75 nSec.
ENABLE B
75 nSec.
Data N B
Data N A
DATA
A or B OUT
HIGH Z
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
05 Jun 2013
•
e-mail: [email protected]
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.
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.
These devices do not normally require heat sinks, however, standard precautionary design and layout procedures should be used to ensure devices do
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
05 Jun 2013
•
e-mail: [email protected]
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
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
21
Lead Material: Kovar alloy
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
1.11/1.08
(28.20/27.43)
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)
0.110/0.090
(2.794/2.286
0.900 ±0.010
(22.86)
0.110/0.090
(2.794/2.286)
SEATING
PLANE
0.035/0.015
(0.889/0.381)
0.045/0.035
(1.143/0.889)
ORDERING INFORMATION
OPERATING
TEMP. RANGE
PACKAGE
ROHS
ADSD-1402MC
0 to +70°C
DDIP
No
ADSD-1402MC-C
0 to +70°C
DDIP
Yes
ADSD-1402ME
–40 to +100°C
DDIP
No
ADSD-1402ME-C
–40 to +100°C
DDIP
Yes
ADSD-1402MM
–55 to +125°C
DDIP
No
ADSD-1402MM-C
–55 to +125°C
DDIP
Yes
MODEL NUMBER
DATEL
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
ACCESSORIES
HS-40
Heat Sink for all ADSD-1402 models
. 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: [email protected]
05 Jun 2013
MDA_ADSD-1402.C01 Page 5 of 5