ADS-937

®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
GENERAL DESCRIPTION
INPUT/OUTPUT CONNECTIONS
The low-cost ADS-937 is a 16-bit, 1MHz sampling A/D
converter. This device accurately samples full-scale input
signals up to Nyquist frequencies with no missing codes.
This feature, combined with excellent signal-to-noise ratio
(SNR) and total harmonic distortion (THD), makes the ADS937 the ideal choice for both time-domain (CCD/medical
imaging, scanners, process control) and frequency-domain
(radar, telecommunications, spectrum analysis) applications.
FEATURES
Packaged in a 32-pin, side-brazed, metal-sealed, ceramic
TDIP, the functionally complete ADS-937 contains a
fastsettling sample-hold amplifier, a subranging (two-pass)
A/D converter, an internal reference, timing/control logic,
and error correction circuitry. Digital input and output levels
are TTL. The ADS-937 only requires the rising edge of the
start convert pulse to operate.

16-bit resolution

1MHz sampling rate

No missing codes over full HI-REL temperature
range

Very low power, 1.25 Watts

Small, 32-pin, side-brazed ceramic TDIP
Requiring ±15V and ±5V supplies, the ADS-937 typically
dissipates 1.25 Watts. The device is offered with both
bipolar (±5V) and unipolar (0 to –10V) analog input ranges.
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, errorcorrecting circuit enables the device to achieve specified
performance over the full military temperature range.

Edge-triggered

Excellent performance

Ideal for both time and frequency-domain
applications

Low cost
PIN
FUNCTION
PIN
FUNCTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
ANALOG INPUT
GROUND
UNIPOLAR
OFFSET ADJUST
+5V REFERENCE OUT
GAIN ADJUST
COMPENSATION
-15V SUPPLY
+15V SUPPLY
+5V SUPPLY
-5V SUPPLY
GROUND
GROUND
+5V SUPPLY
EOC
START CONVERT
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
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
BIT 15
BIT 16 (LSB)
BLOCK DIAGRAM
UNIPOLAR 3
OFFSET ADJUST 4
32 BIT 1 (MSB)
BUFFER
–
FLASH
ADC
1
S/H
+
GAIN ADJUST 6
GAIN
CIRCUIT
30 BIT 3
29 BIT 4
REF
DAC
A

+5V REFERENCE OUT 5
28 BIT 5
DIGITAL CORRECTION LOGIC
ANALOG INPUT 1
31 BIT 2
COMPENSATION 7
27 BIT 6
26 BIT 7
25 BIT 8
24 BIT 9
23 BIT 10
22 BIT 11
21 BIT 12
20 BIT 13
FLASH
ADC
2
AMP
19 BIT 14
18 BIT 15
17 BIT 16 (LSB)
START CONVERT 16
TIMING AND
CONTROL LOGIC
EOC 15
10
11
2, 12
14
9
8
13
+5V ANALOG
SUPPLY
–5V ANALOG
SUPPLY
ANALOG
GROUND
+5V DIGITAL
SUPPLY
+15V
SUPPLY
–15V
SUPPLY
DIGITAL
GROUND
Figure 1. ADS-937 Functional Block Diagram
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 1 of 8
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
+15V Supply (Pin 9)
–15V Supply (Pin 8)
+5V Supply (Pins 10, 14)
–5V Supply (Pin 11)
Digital Input (Pin 16)
Analog Input (Pin 1)
Lead Temperature (10 seconds)
PHYSICAL/ENVIRONMENTAL
LIMITS
0 to +16
0 to –16
0 to +6
0 to -6
–0.3 to +VDD +0.3
±15
+300
UNITS
Volts
Volts
Volts
Volts
Volts
Volts
°C
PARAMETERS
Operating Temp. Range, Case
ADS-937MC, MC-C
ADS-937ME, ME-C
ADS-937MM, MM-C
ADS-937/883, 883-C
Thermal Impedance
Θjc
Θca
Storage Temperature Range
Package Type
Weight
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, ±VCC = ±15V, +VDD = ±5V, 1MHz sampling rate, and a minimum 1 minute warm-up ➀ unless otherwise specified.)
+25°C
0 TO +70°C
ANALOG INPUT
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
Input Voltage Range ➁
—
±5
—
—
±5
—
Bipolar
—
0 to -10
—
—
0 to -10
—
Unipolar
—
1
—
—
1
—
Input Resistance
—
7
15
—
7
15
Input Capacitance
DIGITAL INPUTS
Logic Levels
+2.0
—
—
+2.0
—
—
Logic "1"
—
—
+0.8
—
—
+0.8
Logic "0"
—
—
+20
—
—
+20
Logic Loading "1"
—
—
–20
—
—
–20
Logic Loading "0"
20
500
—
20
500
—
Start Convert Positive Pulse Width ➂
STATIC PERFORMANCE
—
16
—
—
16
—
Resolution
—
±0.75
—
—
±1.5
—
Integral Nonlinearity
–0.95
±0.5
+1
–0.95
±0.5
+1
Differential Nonlinearity (fin = 10kHz)
—
±0.1
±0.25
—
±0.2
±0.4
Full Scale Absolute Accuracy
—
±0.1
±0.15
—
±0.1
±0.25
Bipolar Zero Error (Tech Note 2)
—
±0.1
±0.2
—
±0.15
±0.3
Bipolar Offset Error (Tech Note 2)
—
±0.1
±0.3
—
±0.25
±0.5
Gain Error (Tech Note 2)
—
±0.1
±0.15
—
±0.1
±0.25
Unipolar Offset Error (Tech Note 2)
16
—
—
16
—
—
No Missing Codes (fin = 10kHz)
DYNAMIC PERFORMANCE
Peak Harmonics (–0.5dB)
—
–90
-84
—
–90
-84
dc to 100kHz
—
–88
-81
—
–88
-81
100kHz to 500kHz
Total Harmonic Distortion (–0.5dB)
—
–87
-82
—
–87
-82
dc to 100kHz
—
–86
-81
—
–86
-81
100kHz to 500kHz
Signal-to-Noise Ratio
(w/o distortion, –0.5dB)
85
88
—
85
88
—
dc to 100kHz
84
87
—
84
87
—
100kHz to 500kHz
Signal-to-Noise Ratio ➃
(& distortion, –0.5dB)
81
85
—
81
85
—
dc to 100kHz
80
84
—
80
84
—
100kHz to 500kHz
—
110
—
—
110
—
Noise
Two-Tone Intermodulation
Distortion (fin = 100kHz,
—
–85
—
—
–85
—
240kHz, fs = 1MHz, –0.5dB)
Input Bandwidth (–3dB)
—
4.5
—
—
4.5
—
Small Signal (–20dB input)
—
4
—
—
4
—
Large Signal (–0.5dB input)
—
84
—
—
84
—
Feedthrough Rejection (fin = 500kHz)
—
±33
—
—
±33
—
Slew Rate
—
+20
—
—
+20
—
Aperture Delay Time
—
5
—
—
5
—
Aperture Uncertainty
S/H Acquisition Time
—
260
300
—
260
300
( to ±0.003%FSR, 10V step)
—
500
1000
—
500
1000
Overvoltage Recovery Time ➄
1
—
—
1
—
—
A/D Conversion Rate
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
MIN.
TYP.
MAX.
UNITS
0
–40
–55
–55
—
—
—
—
+70
+100
+125
+125
°C
°C
°C
°C
—
5
—
°C/Watt
—
22
—
°C/Watt
–65
—
+150
°C
32-pin, side-brazed, metal-sealed, ceramic TDIP
0.56 ounces (16 grams)
MIN.
–55 TO +125°C
TYP.
MAX.
UNITS
—
—
—
—
±5
0 to -10
1
7
—
—
—
15
Volts
Volts
kΩ
pF
+2.0
—
—
—
20
—
—
—
—
500
—
+0.8
+20
–20
—
Volts
Volts
μA
μA
ns
—
—
–0.95
—
—
—
—
—
16
16
±2
±0.5
±0.25
±0.15
±0.2
±0.4
±0.15
—
—
—
+1.5
±0.5
±0.5
±0.5
±0.7
±0.5
—
Bits
LSB
LSB
%FSR
%FSR
%FSR
%
%FSR
Bits
—
—
–88
–87
-83
-80
dB
dB
—
—
–86
–85
-81
-80
dB
dB
84
83
87
87
—
—
dB
dB
80
78
—
84
83
110
—
—
—
dB
dB
μVrms
—
–85
—
dB
—
—
—
—
—
—
4.5
4
84
±33
+20
5
—
—
—
—
—
—
MHz
MHz
dB
V/μs
ns
ps rms
—
—
1
260
500
—
300
1000
—
ns
ns
MHz
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 2 of 8
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
MIN.
ANALOG OUTPUT
Internal Reference
Voltage
Drift
External Current
DIGITAL OUTPUTS
Logic Levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
Output Coding
POWER REQUIREMENTS
Power Supply Ranges
+15V Supply
–15V Supply
+5V Supply
–5V Supply
Power Supply Currents
+15V Supply
–15V Supply
+5V Supply
-5V Supply
Power Dissipation
Power Supply Rejection
+4.95
—
—
+25°C
TYP.
MAX.
MIN.
+5.0
±30
1
+5.05
—
—
+4.95
—
—
+2.4
—
—
+2.4
—
—
+0.4
—
—
—
–4
—
—
—
+4
—
(Offset) Binary / Complementary (Offset) Binary
0 TO +70°C
TYP.
MAX.
MIN.
+5.0
±30
1
+5.05
—
—
+4.95
—
—
—
—
—
—
—
+0.4
–4
+4
–55 TO +125°C
TYP.
MAX.
UNITS
+5.0
±30
1
+5.05
—
—
Volts
ppm/°C
mA
+2.4
—
—
—
—
—
—
—
—
+0.4
–4
+4
Volts
Volts
mA
mA
+14.5
–14.5
+4.75
–4.75
+15.0
–15.0
+5.0
–5.0
+15.5
–15.5
+5.25
–5.25
+14.5
–14.5
+4.75
–4.75
+15.0
–15.0
+5.0
–5.0
+15.5
–15.5
+5.25
–5.25
+14.5
–14.5
+4.75
–4.75
+15.0
–15.0
+5.0
–5.0
+15.5
–15.5
+5.25
–5.25
Volts
Volts
Volts
Volts
—
—
—
—
—
—
+7
-8
+133
-72
1.25
—
+11
-10
+145
-80
1.4
±0.01
—
—
—
—
—
—
+7
-8
+133
-72
1.25
—
+11
-10
+145
-80
1.4
±0.01
—
—
—
—
—
—
+7
-8
+133
-72
1.25
—
+11
-10
+145
-80
1.4
±0.01
mA
mA
mA
mA
Watts
%FSR/%V
FOOTNOTES:
➀ All power supplies must be on before applying a start convert pulse. All
supplies and the clock (START CONVERT) must be present during warm-up
periods. The device must be continuously converting during this time.
➃ Effective bits is equal to:
(SNR + Distortion) – 1.76 +
20 log
Full Scale Amplitude
Actual Input Amplitude
6.02
➁ Contact DATEL for other input voltage ranges.
➂ A 1MHz clock with a 500nsec positive pulse width (50% duty cycle) is used
for all production testing. Any duty cycle may be used as long as a minimum
positive pulse width of 20nsec is maintained. For applications requiring lower
sampling rates, clock frequencies less than 1MHz may be used.
TECHNICAL NOTES
➄ This is the time required before the A/D output data is valid once the analog
input is back within the specified range.
THERMAL REQUIREMENTS
1. Obtaining fully specified performance from the ADS-937 requires
careful attention to pc-card layout and power supply decoupling. The
device's ground pins are not connected to each other internally. For
optimal performance, tie all ground pins (2, 12 and 13) directly to a
large analog ground plane beneath the package. The device's +5V
supply pins are not connected to each other internally and should be
connected to a clean analog +5V supply. Bypass all power supplies and the +5V REFERENCE OUTPUT (pin 5) 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. Tie a 47μF
capacitor between COMPENSATION (pin 7) and ground (See figure 2.).
2. The ADS-937 achieves its specified accuracies without the need for
external calibration. If required, the device's small initial offset and
gain errors can be reduced to zero using the adjustment circuitry
shown in Figure 2. When using this circuitry, or any similar offset and
gain calibration hardware, make adjustments following warm-up. To
avoid interaction, always adjust offset before gain. Float pins 4 and 6
if not using offset and gain adjust circuits.
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. These devices do not normally
require heat sinks, however, standard precautionary 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.
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.
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 3 of 8
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
CALIBRATION PROCEDURE
Connect the converter per Table 1 for the appropriate input voltage
range. Any offset/gain calibration procedures should not be implemented until the device is fully warmed up. To avoid interaction, adjust
offset before gain. The ranges of adjustment for the circuits in Figure
2 are guaranteed to compensate for the ADS-937's initial accuracy
errors and may not be able to compensate for additional system errors.
A/D converters are calibrated by positioning their digital outputs exactly on the transition point between two adjacent digital output codes.
This is accomplished by connecting LED's to the digital outputs and
performing adjustments 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.
For the ADS-937, offset adjusting is normally accomplished when the
analog input is 0 minus ½LSB (–76.3μV). See Table 2 for the proper
bipolar and unipolar output coding.
3. For a bipolar input - Adjust the offset potentiometer until the output code
flickers equally between 1000 0000 0000 0000 and 0111 1111 1111
1111.
For a unipolar input - Adjust the offset potentiometer until all output bits
are 0's and the LSB flickers between 0 and 1.
GAIN ADJUST PROCEDURE
1. Apply –4.999771V to the ANALOG INPUT (pin 1) for bipolar gain adjust or
apply –9.999771V to pin 1 for unipolar gain adjust.
2. For a unipolar input - Adjust the gain potentiometer until all output bits
are 1's and the LSB flickers between 1 and 0.
For a bipolar input - Adjust the gain potentiometer until all output bits are
1's and the LSB flickers between 1 and 0.
Gain adjusting is accomplished when the analog input is at nominal full
scale minus 1½LSB's (–9.999771V for unipolar and –4.999771V for
bipolar).
3. To confirm proper operation of the device, vary the applied input voltage
to obtain the output coding listed in Table 2.
ZERO/OFFSET ADJUST PROCEDURE
Table 1. Setting Output Coding Selection (Pin 35)
1. Apply a train of pulses to the START CONVERT input (pin 16) so that the
converter is continuously converting.
INPUT VOLTAGE RANGE
2. For unipolar or bipolar zero/offset adjust, apply –76.3μV to the ANALOG
INPUT (pin 1).
INPUT PIN
TIE TOGETHER
±5V
Pin 1
Pins 2 and 3
0 to -10V
Pin 1
Pins 3 and 5
Table 2. Output Coding
COMPLEMENTARY BINARY
DATEL
COMPLEMENTARY OFFSET BINARY
OUTPUT CODING
UNIPOLAR
SCALE
INPUT VOLTAGE
0 to -10V
INPUT RANGE
±5V
BIPOLAR
SCALE
–FS +1 LSB
-9.999847
1111 1111 1111 1111
–7/8 FS
-8.750000
1110 0000 0000 0000
0000 0000 0000 0000
+4.999847
+FS -1 LSB
0001 1111 1111 1111
+3.750000
+3/4 FS
–3/4 FS
-7.500000
–1/2 FS
-5.000000
1100 0000 0000 0000
0011 1111 1111 1111
+2.500000
+1/2 FS
1000 0000 0000 0000
0111 1111 1111 1111
+0.000000
–1/4 FS
0
-2.500000
0100 0000 0000 0000
1011 1111 1111 1111
-2.500000
–1/2 FS
–1/8 FS
-1.250000
0010 0000 0000 0000
1101 1111 1111 1111
-3.750000
–3/4 FS
–1 LSB
-0.000153
0000 0000 0000 0001
1111 1111 1111 1110
-4.999847
–FS +1 LSB
0
0.000000
0000 0000 0000 0000
1111 1111 1111 1111
-5.000000
–FS
MSB
•
LSB
MSB
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
LSB
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 4 of 8
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
20k
Pin 5 (ADS-937)
–15V
+15V
10k
6
GAIN
ADJUST
4.7μF
0.1μF
OFFSET
ADJUST
EOC
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
13 DIGITAL
GROUND
8
4.7μF
+
4.7μF
0.1μF
+
–15V
0.1μF
12 ANALOG
GROUND
ADS-937
9
10
+5V ANALOG
+
0.1μF
4.7μF
2 ANALOG
GROUND
+
–5V ANALOG
4
14
+5V DIGITAL
+15V
15
4.7μF
0.1μF
START CONVERT
COMPENSATION
11
ANALOG INPUT
5 +5V
REF. OUT
0.1μF
UNIPOLAR
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
BIT 15
BIT 16 (LSB)
16
7
47μF
+
1
3
4.7μF
Figure 2. Typical ADS-937 Connection Diagram
N
START
CONVERT
N+1
500ns typ.
5ns typ.
INTERNAL S/H
Acquisition Time
740ns typ.
260ns typ.
Hold
65ns typ.
Conversion Time
730ns typ.
EOC
20ns typ.
OUTPUT
DATA
Invalid Data
20ns
N
Data N-1 Valid
Data N-2 Valid
980ns typ.
Scale is approximately 50ns per division.
Note: Scale is approximately 50ns per division. Sampling Rate = 1MHz.
Figure 3. ADS-937 Timing Diagram
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 5 of 8
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
0
–10
Amplitude Relative to Full Scale (dB)
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
0
50
kHz
100
kHz
150
kHz
200
kHz
250
kHz
300
kHz
350
kHz
400
kHz
450
kHz
500
kHz
Frequency
(fs = 1MHz, fin = 480kHz, Vin = – 0.5dB, 16,384-point FFT)
Figure 4. FFT Analysis of ADS-937
Number of Occurrences
DNL (LSB's)
0.63
– 0.50
0
0
65,536
Codes
65,536
Digital Output Code
Figure 5. ADS-937 Histogram and Differential Nonlinearity
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 6 of 8
P4
AIN
R1
C12
OPT
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
N.C.
+5VD
–5V
21
19
17
15
13
11
9
7
5
3
1
22
20
18
16
14
12
10
8
6
•
4
2
+5V
+15V
–15V
N.C.
+
4 C23
OPT
N.C.
6
OPT
23
AR1
C22
OPT
24
+
7
25
–15V
3
2 –
+15V
R2
OPT
26
P1
OPT
AMPLIFIER
OPTION
SG2
C27
C11
OPT
1
REF
C18
Tel: (508) 339-3000
•
+
10uF
C24
C26
0.1uF
R3
X1
14
C25
7
1
1
2
51
R6
5
4
U3
3
10
9
C10
0.1uF
U3
13
12
6
C9
0.1uF
C20
C6
0.1uF
+
C14 22uF
C5 0.1uF
EXT CLK
P3
JPR3
C4
0.1uF
C28
0.1uF
SG1
+ C16 22uF
+
10uF +
C21
10uF
+5VD
8
C17
C8
0.1uF
–15V
C15
10uF
R4
20K
10uF
+15V
–15V
0.1uF
10
C19
10uF
+5VD
+5VA
C7
0.1uF
R5
20K
"OFFSET ADJ."
"GAIN ADJ."
10uF
2
JPR2
3
+15V
JPR2
SG4
SG3
+
OPT
+
•
+
DATEL
+
8
U3
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
11
(LSB) BIT16
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
(MSB) BIT1
ADS-937
UUT
START CONVERT
EOC
+5VD
DGND
AGND
-5VA
+5VA
+15VA
–15VA
COMP.
GAIN ADJ
REF. OUT
OFFSET ADJ.
UNIPOLAR
AGND
AIN
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
+5VD
10
U2
10
U1
1Q
1Q
www.datel.com
7
2
14
U3
1
OC
8Q
7Q
6Q
5Q
4Q
3Q
2Q
20
OC
8Q
7Q
6Q
5Q
4Q
3Q
2Q
20
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
0.1uF
3
74HCT573
1
START
CONVERT
12 (LSB) BIT16
13
14
15
16
17
18
19
C2
74HCT573
1
12
13
14
15
16
17
18
19 (MSB) BIT1
+5VD
34
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
P2
P2
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
EOC
®
2
1
10uF
C3
C29 +
LE
8D
7D
6D
5D
4D
3D
2D
1D
LE
8D
7D
6D
5D
4D
3D
2D
1D
0.1uF
11
9
8
7
6
5
4
3
2
+5VD
11
9
8
7
6
5
4
3
2
C1
0.1uF
®
ADS-937
16-Bit, 1MHz Sampling A/D Converters
Figure 6. ADS-937 Evaluation Board.
•
e-mail: help@datel.com
26 Apr 2013 MDA_ADS-937.B02 Page 7 of 8
+
®
ADS-937
®
16-Bit, 1MHz Sampling A/D Converters
5000
4000
3000
2000
This histogram represents the typical
peak-to- peak noise (including quantization noise) associated with the ADS-937.
1000
0.00
Digital Output Code
Figure 7. ADS-937 Grounded Input Histogram
MECHANICAL DIMENSIONS INCHES (MM)
1.62 MAX.
(41.15)
Dimension Tolerances
(unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
0.92 MAX.
(23.37)
Lead Material: Kovar Alloy
Lead Finish: 50 microinches (minimum)
gold plating over 100 microinches
(nominal) nickel plating
1.50 TYP
(38.10)
SEATING PLANE
0.05 TYP.
(1.27)
0.220 TYP.
(6.86)
PIN 1 INDEX
0.010 TYP.
(0.254)
0.05 TYP.
(1.27)
0.018 TYP.
(0.46)
0.100 TYP.
(2.54)
0.90 TYP.
(22.86)
0.175 TYP
(4.45)
0.05 TYP.
(1.27)
ORDERING INFORMATION
MODEL NUMBER
ADS-937MC
ADS-937MC-C
ADS-937ME
ADS-937ME-C
ADS-937MM
ADS-937MM-C
ADS-937/883
ADS-937-C/883
OPERATING TEMPERATURE 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
-55 to +125°C
-55 to +125°C
PACKAGE
TDIP
TDIP
TDIP
TDIP
TDIP
TDIP
TDIP
TDIP
ROHS
No
Yes
No
Yes
No
Yes
No
Yes
ACCESSORIES
ADS-B937 Evaluation Board
(without ADS937)
Receptacles for PC board mounting can be ordered through AMP, Inc., Part # 3-331272-8 (Component Lead Socket), 32 required.
For availabilty of MIL-STD-883 product, contact DATEL.
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
26 Apr 2013 MDA_ADS-937.B02 Page 8 of 8