ADS-937MC-C Murata, ADS-937MC-C Datasheet - Page 3

• Manufacturer Part Number: ADS-937MC-C
• Description: or 0 to -10v input range, no pipeline delays, 0 c to +70 c temperature range, rohs compliant....
• Manufacturer: Murata

TECHNICAL NOTES
1. Obtaining fully specifi ed performance from the ADS-937 requires
2. The ADS-937 achieves its specifi ed accuracies without the need for
3. Applying a start convert pulse while a conversion is in progress (EOC
DATEL
ANALOG OUTPUT
Internal Reference
External Current
DIGITAL OUTPUTS
Logic Levels
Output Coding
POWER REQUIREMENTS
Power Supply Ranges
Power Supply Currents
Power Dissipation
Power Supply Rejection
➀ All power supplies must be on before applying a start convert pulse. All
➁ Contact DATEL for other input voltage ranges.
➂ A 1MHz clock with a 500nsec positive pulse width (50% duty cycle) is used
Footnotes:
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 sup-
plies 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 fi gure 2.).
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.
= logic "1") will initiate a new and inaccurate conversion cycle. Data
for the interrupted and subsequent conversions will be invalid.
Voltage
Drift
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
+15V Supply
–15V Supply
+5V Supply
–5V Supply
+15V Supply
–15V Supply
+5V Supply
-5V Supply
supplies and the clock (START CONVERT) must be present during warm-up
periods. The device must be continuously converting during this time.
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.
®
+4.95
+14.5
+4.75
–14.5
–4.75
+2.4
MIN.
—
—
—
—
—
—
—
—
—
—
—
(Offset) Binary / Complementary (Offset) Binary
®
• 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: [phone] • www.datel.com • e-mail: [e-mail]
+25°C
+15.0
–15.0
+133
+5.0
+5.0
–5.0
±30
1.25
TYP.
-72
—
—
—
—
+7
–8
—
1
+5.05
+15.5
+5.25
±0.01
–15.5
–5.25
+145
MAX.
+0.4
1.35
-10
-80
+4
+9
—
—
—
–4
+4.95
+14.5
+4.75
–14.5
–4.75
+2.4
MIN.
—
—
—
—
—
—
—
—
—
—
—
➃ Effective bits is equal to:
➄ This is the time required before the A/D output data is valid once the analog
THERMAL REQUIREMENTS
input is back within the specifi ed range.
All DATEL sampling A/D converters are fully characterized and
specifi ed 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 fi gures for each device are listed in
their respective specifi cation 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 fl ow over the
surface can greatly help reduce the package temperature.
0 TO +70°C
+15.0
–15.0
+133
+5.0
+5.0
–5.0
1.25
±30
(SNR + Distortion) – 1.76 +
-72
TYP.
+7
—
—
—
—
—
-8
1
+5.05
+15.5
+5.25
±0.01
–15.5
–5.25
MAX.
+145
+0.4
1.35
-10
-80
+4
+9
—
—
—
–4
16-Bit, 1MHz Sampling A/D Converters
+4.95
+14.5
+4.75
–14.5
–4.75
+2.4
MIN.
—
—
—
—
—
—
—
—
—
—
—
6.02
20 log
01 Apr 2011 MDA_ADS-937.A03 Page 3 of 8
–55 TO +125°C
+15.0
–15.0
+133
+5.0
+5.0
TYP.
±30
–5.0
1.25
Actual Input Amplitude
-72
—
—
—
—
+7
—
-8
Full Scale Amplitude
1
+5.05
+15.5
–15.5
+5.25
–5.25
±0.01
+145
+0.4
1.35
MAX.
-10
-80
—
—
—
+4
+9
–4
ADS-937
%FSR/%V
ppm/°C
Watts
UNITS
Volts
Volts
Volts
Volts
Volts
Volts
Volts
mA
mA
mA
mA
mA
mA
mA