ADS-943

ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
PRODUCT OVERVIEW
The low-cost ADS-943 is a 14-bit, 3MHz
sampling A/D converter optimized to meet the
demanding dynamic-range and sampling-rate
requirements of contemporary digital telecommunications applications. The ADS-943's outstanding
dynamic performance is evidenced by a peak harmonic specification of –83dB and a signal-to-noise
ratio (SNR) of 79dB. Additionally, the ADS-943
easily achieves the 2.2MHz minimum sampling
rate required by digital receivers in certain ADSL,
HDSL and ATM applications. The ADS-943 also
addresses size and power constraints normally
associated with these types of applications. This
device requires just ±5V supplies, dissipates 1.7
Watts, and is packaged in a very small 24-pin DDIP.
Although optimized for frequency-domain
applications, the ADS-943's DNL and noise specifications are also outstanding, thereby making
it an equally impressive device for time-domain
applications (graphic and medical imaging, process control, etc.). In fact, the ADS-943 guarantees
no missing codes to the 14-bit level over the full
HI-REL operating temperature range.
The functionally complete ADS-943 contains a
fast-settling sample-hold amplifier, a subranging
(two-pass) A/D converter, an internal reference,
timing/control logic, and error-correction circuitry.
FEATURES
„ 14-bit resolution
„ 3MHz minimum sampling rate
„ Ideal for both frequency and time-domain
applications
„ Excellent peak harmonics, –83dB
„ Excellent signal-to-noise ratio, 79dB
„ No missing codes over full HI-REL temperature
range
„ ±5V supplies, 1.7 Watts
„ Small, 24-pin ceramic DDIP or SMT
„ Low cost
Digital input and output levels are TTL. The unit
is edge-triggered, requiring only the rising edge
of a start convert pulse to initiate a conversion.
The device is offered with a bipolar input range
of ±2V. Models are available in commercial (0 to
+70°C), industrial (–40 to +100°C), or HI-REL (–55
to +125°C) operating temperature ranges. A proprietary, auto-calibrating, error-correcting circuit
allows the device to achieve specified performance
over the full HI-REL temperature range.
PIN
INPUT/OUTPUT CONNECTIONS
FUNCTION
PIN FUNCTION
1
BIT1 (MSB)
24
ANALOG GROUND
2
BIT 2
23
OFFSET ADJUST
3
BIT 3
22
+5V ANALOG SUPPLY
4
BIT 4
21
ANALOG INPUT
5
BIT 5
20
–5V SUPPLY
6
BIT 6
19
ANALOG GROUND
7
BIT 7
18
START CONVERT
8
BIT 8
17
EOC
9
BIT 9
16
BIT 14 (LSB)
10
BIT 10
15
BIT 13
11
BIT 11
14
DIGITAL GROUND
12
BIT 12
13
+5V DIGITAL SUPPLY
BLOCK DIAGRAM
OFFSET ADJUST 23
BUFFER
16 BIT 14 (LSB)
FLASH
ADC
1
+
15 BIT 13
12 BIT 12
POWER AND GROUNDING
REF
22
+5V DIGITAL SUPPLY
13
DIGITAL GROUND
14
–5V SUPPLY
20
ANALOG GROUND
DAC
3
19, 24
AMP
START CONVERT 18
EOC 17
FLASH
ADC
2
REGISTER
+5V ANALOG SUPPLY
11 BIT 11
OUTPUT REGISTER
S/H
DIGITAL CORRECTION LOGIC
–
REGISTER
ANALOG INPUT 21
10 BIT 10
9
BIT 9
8
BIT 8
7
BIT 7
6
BIT 6
5
BIT 5
4
BIT 4
3
BIT 3
2
BIT 2
1
BIT 1 (MSB)
TIMING AND
CONTROL LOGIC
Figure 1. ADS-943 Functional Block Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 1 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
LIMITS
+12V/+15V Supply (Pin 22)
0 to +6
–12V/–15V Supply (Pin 24)
0 to –6
+5V Supply (Pin 13)
0 to +6
Digital Input (Pin 16)
–0.3 to +VDD +0.3
Analog Input (Pin 20)
±5
Lead Temperature (10 seconds)
+300
PHYSICAL/ENVIRONMENTAL
PARAMETERS
MIN.
TYP.
MAX.
UNITS
Operating Temp. Range, Case
ADS-943MC, GC, MC-C, GC-C
0
—
+70
°C
ADS-943ME, GE, ME-C, GE-C
–40
—
+100
°C
ADS-943MM, GM, MM-C, GM-C
–55
—
+125
°C
ADS-943MM-QL, 883, MM-QL-C, 883-C
–55
—
+125
°C
Thermal Impedance
θjc
—
6
—
°C/Watt
θca
—
24
—
°C/Watt
Storage Temperature Range
–65
—
+150
°C
Package Type
24-pin, metal-sealed, ceramic DDIP or SMT
Weight
0.42 ounces (12 grams)
UNITS
Volts
Volts
Volts
Volts
Volts
°C
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, +VDD = +5V, 3MHz sampling rate, and a minimum 3 minute warmup ➀ unless otherwise specified.)
ANALOG INPUT
Input Voltage Range d
Input Resistance
Input Capacitance
DIGITAL INPUT
Logic Levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
Start Convert Positive Pulse Width ➂
STATIC PERFORMANCE
Resolution
Integral Nonlinearity (fin = 10kHz)
Differential Nonlinearity (fin = 10kHz)
Full Scale Absolute Accuracy
Bipolar Zero Error (Tech Note 2)
Gain Error (Tech Note 2)
No Missing Codes (fin = 10kHz)
No Missing Codes (fin = 10kHz)
DYNAMIC PERFORMANCE
Peak Harmonics (–0.5dB)
dc to 500kHz
500kHz to 1MHz
1MHz to 1.5MHz
Total Harmonic Distortion (–0.5dB)
dc to 500kHz
500kHz to 1MHz
1MHz to 1.5MHz
Signal-to-Noise Ratio (w/o distortion, –0.5dB)
dc to 500kHz
500kHz to 1MHz
1MHz to 1.5MHz
Signal-to-Noise Ratio f (& distortion, –0.5dB)
dc to 500kHz
500kHz to 1MHz
1MHz to 1.5MHz
Noise
Two-Tone Intermodulation Distortion
(fin = 975kHz, 1.2MHz, fs = 3MHz, –0.5dB)
Input Bandwidth (–3dB)
Small Signal (–20dB input)
Large Signal (–0dB input)
Feedthrough Rejection (fin = 1.5MHz)
Slew Rate
Aperture Delay Time
Aperture Uncertainty
S/H Acquisition Time ( to ±0.003%FSR, 4V step)
Overvoltage Recovery Time ➄
A/D Conversion Rate
MIN.
—
—
—
+25°C
TYP.
±2
280
6
MAX.
—
—
15
MIN.
—
—
—
0 TO +70°C
TYP.
±2
280
6
MAX.
—
—
15
MIN.
—
—
—
–55 TO +125°C
TYP.
±2
280
6
MAX.
—
—
15
UNITS
Volts
Ω
pF
+2.0
—
—
—
10
—
—
—
—
20
—
+0.8
+20
–20
—
+2.0
—
—
—
10
—
—
—
—
20
—
+0.8
+20
–20
—
+2.0
—
—
—
10
—
—
—
—
20
—
+0.8
+20
–20
—
Volts
Volts
μA
μA
—
—
–0.95
—
—
—
14
14
14
±0.75
±0.5
±0.15
±0.1
±0.2
—
—
—
—
+1.25
±0.4
±0.3
±0.5
—
—
—
—
–0.95
—
—
—
14
14
14
±0.75
±0.5
±0.15
±0.1
±0.2
—
—
—
—
+1.25
±0.4
±0.3
±0.5
—
—
—
—
–0.95
—
—
—
14
14
14
±1
±0.75
±0.4
±0.3
±0.4
—
—
—
—
+1.5
±0.6
±0.6
±1.25
—
—
Bits
LSB
LSB
%FSR
%FSR
%
Bits
Bits
—
—
—
–83
–83
–83
–77
–77
–77
—
—
—
–83
–83
–83
–77
–77
–77
—
—
—
–81
–81
–81
–75
–75
–75
dB
dB
dB
—
—
—
–80
–80
–80
–76
–76
–76
—
—
—
–80
–80
–80
–76
–76
–76
—
—
—
–78
–77
–77
–74
–73
–73
dB
dB
dB
76
76
75
79
79
78
—
—
—
76
76
75
79
79
78
—
—
—
75
74
74
78
77
77
—
—
—
dB
dB
dB
73
73
73
—
77
77
77
125
—
—
—
—
73
73
73
—
77
77
77
125
—
—
—
—
71
71
71
—
75
75
74
125
—
—
—
—
dB
dB
dB
μVrms
—
–82
—
—
–82
—
—
–82
—
dB
—
—
—
—
—
—
—
—
3
30
10
85
±400
+5
2
208
100
—
—
—
—
—
—
—
215
333
—
—
—
—
—
—
—
—
—
3
30
10
85
±400
+5
2
208
100
—
—
—
—
—
—
—
215
333
—
—
—
—
—
—
—
—
—
3
30
10
85
±400
+5
2
208
100
—
—
—
—
—
—
—
215
333
—
MHz
MHz
dB
V/μs
ns
ps rms
ns
ns
MHz
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 2 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
DIGITAL OUTPUTS
Logic Levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
Output Coding
POWER REQUIREMENTS
Power Supply Ranges➅
+5V Supply
–5V Supply
Power Supply Currents
+5V Supply
–5V Supply
Power Dissipation
Power Supply Rejection
MIN.
+25°C
TYP.
MAX.
MIN.
0 TO +70°C
TYP.
MAX.
MIN.
–55 TO +125°C
TYP.
MAX.
UNITS
+2.4
—
—
—
—
—
—
—
—
+0.4
–4
+4
+2.4
—
—
—
—
—
—
+0.4
—
–4
—
+4
Offset Binary
+2.4
—
—
—
—
—
—
—
—
+0.4
–4
+4
Volts
Volts
mA
mA
+4.75
–4.75
+5.0
–5.0
+5.25
–5.25
+4.75
–4.75
+5.0
–5.0
+5.25
–5.25
+4.9
–4.9
+5.0
–5.0
+5.25
–5.25
Volts
Volts
—
—
—
—
+210
–180
1.7
—
+230
–195
2.0
±0.05
—
—
—
—
+210
–180
1.7
—
+230
–195
2.0
±0.05
—
—
—
—
+210
–180
1.7
—
+230
–195
2.0
±0.05
mA
mA
Watts
%FSR/%V
➃ Effective bits is equal to:
Footnotes:
(SNR + Distortion) – 1.76 +
➀ All power supplies must be on before applying a start convert pulse. All supplies and
the clock (START CONVERT) must be present during warmup periods. The device
must be continuously converting during this time.
➁ Contact DATEL for availability of other input voltage ranges.
➂ A 3MHz clock with a 20nsec positive pulse width is used for all production testing.
When sampling at 3MHz, the start convert pulse must be between 10 and 110nsec wide
or between 160 and 300nsec wide. The falling edge must not occur between 110
and 160nsec. For lower sampling rates, wider start pulses may be used.
20 log
Full Scale Amplitude
Actual Input Amplitude
6.02
➄ This is the time required before the A/D output data is valid after the analog input is
back within the specified range. This time is only guaranteed if the input does not
exceed ±2.2V (S/H Saturation Voltage).
➅ The minimum supply voltages of +4.9V and –4.9V for ±VDD are required for –55°C
operation only. The minumum limits are +4.75V and –4.75V when operating at +125°C.
TECHNICAL NOTES
can be reduced to zero using the adjustment circuitry shown in Figures 2
and 3. When using this circuitry, or any similar offset and gain-calibration
hardware, make adjustments following warmup. To avoid interaction,
always adjust offset before gain.
1. Obtaining fully specified performance from the ADS-943 requires careful attention to pc-card layout and power supply decoupling. The device's
analog and digital ground systems are connected to each other internally.
For optimal performance, tie all ground pins (14, 19 and 24) directly to a
large analog ground plane beneath the package.
3. Applying a start convert pulse while a conversion is in progress (EOC =
logic "1") will initiate a new and inaccurate conversion cycle. Data for the
interrupted and subsequent conversions will be invalid.
Bypass all power supplies to ground with 4.7μF tantalum capacitors in
parallel with 0.1μF ceramic capacitors. Locate the bypass capacitors as
close to the unit as possible.
2. The ADS-943 achieves its specified accuracies without the need for external calibration. If required, the device's small initial offset and gain errors
4. A passive bandpass filter is used at the input of the A/D for all production
testing.
2k 7
GAIN
ADJUST
SIGNAL
INPUT
+5V
1.98k7
To Pin21
of ADS-943
507
–5V
Figure 2. Optional ADS-943 Gain
Adjust Calibration Circuit
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 3 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
Gain Adjust Procedure
CALIBRATION PROCEDURE
1. Apply +1.99963V to the ANALOG INPUT (pin 21).
Any offset and/or gain calibration procedures should not be implemented
until devices are fully warmed up. To avoid interaction, offset must be
adjusted before gain. The ranges of adjustment for the circuits in Figures
2 and 3 are guaranteed to compensate for the ADS-943's initial accuracy
errors and may not be able to compensate for additional system errors.
2. Adjust the gain potentiometer until all output bits are 1's and the LSB
flickers between 1 and 0.
3. To confirm proper operation of the device, vary the input signal to obtain
the output coding listed in Table 2.
A/D converters are calibrated by positioning their digital outputs exactly
on the transition point between two adjacent digital output codes. This can
be accomplished by connecting LED's to the digital outputs and adjusting
until certain LED's "flicker" equally between on and off. Other approaches
employ digital comparators or microcontrollers to detect when the outputs
change from one code to the next.
Table 1. Gain and Zero Adjust
INPUT VOLTAGE
RANGE
ZERO ADJUST
+½ LSB
GAIN ADJUST
+FS –1½ LSB
±2V
+122μV
+1.99963V
Offset adjusting for the ADS-943 is normally accomplished at the point
where the MSB is a 1 and all other output bits are 0's and the LSB just
changes from a 0 to a 1. This digital output transition ideally occurs when
the applied analog input is +½ LSB (+122μV).
Table 2. Output Coding for Bipolar Operation
Gain adjusting is accomplished when all bits are 1's and the LSB just
changes from a 1 to a 0. This transition ideally occurs when the analog
input is at +full scale minus 1½ LSB's (+1.99963V).
INPUT VOLTAGE
(±2V RANGE)
+FS – 1 LSB
+1.99976
11 1111 1111 1111
+3/4FS
+1.50000
11 1000 0000 0000
+1/2FS
+1.00000
11 0000 0000 0000
0
0.00000
10 0000 0000 0000
–1/2 FS
–1.00000
01 0000 0000 0000
Zero/Offset Adjust Procedure
1. Apply a train of pulses to the START CONVERT input (pin 18) so the converter is continuously converting.
2. Apply +122μV to the ANALOG INPUT (pin 21).
3. Adjust the offset potentiometer until the output bits are 10 0000 0000
0000 and the LSB flickers between 0 and 1.
–5V
19
ANALOG
INPUT
–1.50000
00 1000 0000 0000
1.99976
00 0000 0000 0001
–FS
–2.00000
00 0000 0000 0000
+5V ~
4.7μF
+
4.7μF 4.7μF
+ +
0.1μF
0.1μF
20
24
0.1μF
22, 13
14
ADS-943
20k7
–5V
START
CONVERT
LSB
–3/4 FS
21
23
MSB
–FS +1 LSB
+5V
ZERO/
OFFSET
ADJUST
OFFSET BINARY
BIPOLAR SCALE
18
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
BIT 13
BIT 14 (LSB)
EOC
~ A single +5V supply should be used for both the +5V analog and +5V digital.
If separate supplies are used, the difference between the two cannot exceed 100mV.
Figure 3. Connection Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 4 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
THERMAL REQUIREMENTS
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.
All DATEL sampling A/D converters are fully characterized and specified over operating temperature (case) ranges of 0 to +70°C and –55
to +125°C. All room-temperature (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.
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
N+1
N
START
CONVERT
20ns typ.
333nsec
10ns typ.
INTERNAL S/H
Acquisition Time
125ns typ.
208ns typ.
215ns max.
Hold
35ns typ.
EOC
130ns
125ns typ.
Conversion Time
120ns min., 130ns typ.,
140ns max.
30ns typ.
Invalid
Data
10ns max.
OUTPUT
DATA
Data N-1 Valid
Data N Valid
Data N+1 Valid
283ns typ.
50ns typ.
Note: 1. Scale is approximately 20ns per division. Sampling rate = 3MHz.
2. The start convert positive pulse width must be between either 10 and 110nsec or
160 and 300nsec (when sampling at 3MHz) to ensure proper operation. For sampling
rates lower than 3MHz, the start pulse can be wider than 300nsec, however a minimum
pulse width low of 30nsec should be maintained. A 3MHz clock with a 20nsec positive
pulse width is used for all production testing.
Figure 4. ADS-943 Timing Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 5 of 9
•
ANA.
IN
www.datel.com
•
SG10
SG3
SG2
SG1
P2
26
24
22
20
18
16
14
12
10
8
6
4
2
25
23
21
19
17
15
13
11
9
7
5
3
1
ANA. IN
20μH
L7
20μH
L6
20μH
L5
20μH
L4
20μH
L3
20μH
L2
20μH
L1
C9
C2
C11
C4
C12
0.01μF
C5
2.2μF
0.01μF
0.01μF
2.2μF
2.2μF
C10
C3
0.01μF
0.01μF
2.2μF
2.2μF
C8
C1
+5VF
2.2μF
0.01μF
C14
0.01μF
2.2μF
C7
C13
C6
–5V
+5VA
+15V
–15V
–5VA
+5V
5
+15V
10
12
11
13
-15V
SG8
0.1μF
(Optional)
U6
HCT7474
21 Aug 2015
5
4
13
12
11
U5
6
7
8
HCT7474
7
ADS-943
AGND
BIT1 1
OFFSET BIT2 2
+5VA
BIT3 3
AIN
BIT4 4
-5V
BIT5 5
AGND
BIT6 6
TRIG
BIT7 7
EOC
BIT8 8
BIT14
BIT9 9
BIT13
BIT10 10
DGND
BIT11 11
+5VD
BIT12 12
U1
3.2k
2.2μF
14
4
PR
5
2
D U6 Q
6
3
CK
Q
1
R3
CLR
0.1μF
C24
+
C23
START CONVERT
24
23
22
21
20
19
18
17
16
15
14
13
+5V
15pF
C25
+5VA
–5V
X1
14
SG9
+5VF
2.2μF
C27
74HCT86
0.1μF
C15
7 GND
U5
14
+5VF
ANA. IN
SG4
0.1μF
C26
3MHz
CRYSTAL
+5VF
Figure 5. ADS-943 Evaluation Board Schematic
9
Q
8
SPARE GATES
0.1μF
C19
(Optional)
-15V
C20
PR
D
CK
CLR
2
R1
C18
0.1μF
(Optional)
SG6
20k
CLC402
HI2541
10
+5VA
OFFSET
ADJUST
-5VA
SG7
6
U4
11
+5VF
+
(Optional)
4
–
R2
SG5
+15V
+
P4
+
+
+
+
+
• Tel: (508) 339-3000
+
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
+
OPTION
2 3
JPR1
10
9
1
P3
U5
U5
+
0.1μF
2.2μF
C16
C22
3
2
3
4
5
6
7
8
9
11
2
3
4
5
6
7
8
9
11
74HCT573
C21
74HCT573
19
18
17
16
15
14
13
12
1
+5VF
19
18
17
16
15
14
13
12
1
2.2μF
Q1
1D
2D
Q2
Q3
3D
4D
Q4
U2 Q5
5D
6D
Q6
Q7
7D
Q8
8D
OE
CE
10
20
10
C17
0.1μF
Q1
1D
2D
Q2
Q3
3D
4D
Q4
5D U3 Q5
6D
Q6
Q7
7D
Q8
8D
OE
CE
20
+
+5VF
3. SEE DATEL DWG A-24546 FOR ADDITIONAL INFORMATION
ON ADS-B946 EVALUATION BOARD.
2. CLOSE SG1-SG3, SG9, SG10.
C1 - C7 ARE 20V.
ALL RESISTORS ARE IN OHMS.
1. UNLESS OTHERWISE SPECIFIED ALL CAPACITORS ARE 50V.
NOTES:
74HCT86
8
74HCT86
2
1
START
CONV.
2 3
JPR2
1
CE
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
TRIG
2
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
P1
1
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
e-mail: [email protected]
MDA_ADS-943.C02 Page 6 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
0
Amplitude Relative to Full Scale (dB)
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
0
150
kHz
300
kHz
450
kHz
600
kHz
750
kHz
900
kHz
1.05
MHz
1.20
MHz
1.35
MHz
1.5
MHz
Frequency
(fs = 3MHz, fin = 1.485MHz, Vin = –0.5dB, 16,384-point FFT)
Figure 6. ADS-943 FFT Analysis
+0.60
DNL (LSB's)
0.00
Number of Occurences
–0.58
0
16,384
Digital Output Code
0
16,384
Digital Output Code
Figure 7. ADS-943 Histogram and Differential Nonlinearity
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 7 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
MECHANICAL DIMENSIONS - INCHES (mm)
1.31 MAX.
(33.27)
24-Pin DDIP
Versions
24
ADS-943MC
ADS-943ME
ADS-943MM
ADS-943/883
ADS-943MC-C
ADS-943ME-C
ADS-943MM-C
ADS-943-C/883
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
13
0.80 MAX.
(20.32)
1
Lead Material: Kovar alloy
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
12
0.100 TYP.
(2.540)
1.100
(27.940)
0.235 MAX.
(5.969)
PIN 1 INDEX
0.200 MAX.
(5.080)
0.010
(0.254)
0.190 MAX.
(4.826)
0.100
(2.540)
0.040
(1.016)
0.018 ±0.002
(0.457)
24-Pin
Surface Mount
Versions
+0.002
–0.001
0.600 ±0.010
(15.240)
SEATING
PLANE
0.025
(0.635)
0.100
(2.540)
1.31 MAX.
(33.02)
ADS-943GC
ADS-943GE
ADS-943GM
ADS-943G/883
ADS-943GC-C
ADS-943GE-C
ADS-943GM-C
ADS-943G-C/883
0.190 MAX.
(4.826)
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
13
24
0.80 MAX.
(20.32)
1
Lead Material: Kovar alloy
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
12
0.020 TYP.
(0.508)
0.060 TYP.
(1.524)
0.130 TYP.
(3.302)
PIN 1
INDEX
0.100
(2.540)
0.100 TYP.
(2.540)
0.020
(0.508)
0.015
(0.381)
MAX. radius
for any pin
0.010 TYP.
(0.254)
0.040
(1.016)
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
• Tel: (508) 339-3000
•
www.datel.com
•
e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 8 of 9
ADS-943
14-Bit, 3MHz, Low-Distortion, Sampling A/D Converters
ORDERING INFORMATION
OPERATING
TEMP. RANGE
PACKAGE
ADS-943MC
0 to +70°C
DDIP
No
ADS-B943
Evaluation Board (without ADS-943)
ADS-943MC-C
0 to +70°C
DDIP
Yes
HS-24
Heat Sinks for all ADS-943 DDIP models.
MODEL NUMBER
ROHS
ADS-943ME
–40 to +100°C
DDIP
No
ADS-943ME-C
–40 to +100°C
DDIP
Yes
ADS-943MM
–55 to +125°C
DDIP
No
ADS-943MM-C
–55 to +125°C
DDIP
Yes
ADS-943MM-QL
–55 to +125°C
DDIP
No
ADS-943MM-QL-C
–55 to +125°C
DDIP
Yes
ADS-943/883
–55 to +125°C
DDIP
No
ADS-943-C/883
–55 to +125°C
DDIP
Yes
ADS-943GC
0 to +70°C
SMT
No
ADS-943GC-C
0 to +70°C
SMT
Yes
ADS-943GE
–40 to +100°C
SMT
No
ADS-943GE-C
–40 to +100°C
SMT
Yes
ADS-943GM
–55 to +125°C
SMT
No
ADS-943GM-C
–55 to +125°C
SMT
Yes
ADS-943G/883
–55 to +125°C
SMT
No
ADS-943G-C/883
–55 to +125°C
SMT
Yes
DATEL is a registered trademark of DATEL, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
ACCESSORIES
Receptacles for PC board mounting can be ordered through AMP
Inc. Part #3-331272-8 (Component Lead Socket), 24 required.
For MIL-STD-883 product specifications, contact DATEL.
DATEL, Inc. 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.
ITAR and ISO 9001/14001 REGISTERED
© 2015 DATEL, Inc.
www.datel.com • e-mail: [email protected]
21 Aug 2015
MDA_ADS-943.C02 Page 9 of 9