ADS-118MM Murata Power Solutions Inc, ADS-118MM Datasheet - Page 3

• Manufacturer Part Number: ADS-118MM
• Description: Analog To Digital Converter
• Manufacturer: Murata Power Solutions Inc

DATEL
➀ All power supplies should be on before applying a start convert pulse. All supplies
➁ Input voltage ranges for ADS-118A is ±1.25V
➂ A 100ns wide start convert pulse is used for all production testing. For applications
DYNAMIC PERFORMANCE (Cont.)
S/H Acquisition Time
Overvoltage Recovery Time ➄
A/D Conversion Rate
DIGITAL OUTPUTS
Logic Levels
Delay, Falling Edge of EOC to
Delay, Falling Edge of ENABLE to
Output Coding
POWER REQUIREMENTS
Power Supply Ranges ➅
Power Supply Currents
Power Dissipation
Power Supply Rejection
Footnotes:
2. The ADS-118 achieves its specifi ed accuracies without the need for
TECHNICAL NOTES
1. Obtaining fully specifi ed performance from the ADS-118 requires careful
and the clock (start convert pulses) must be present during warmup periods. The
device must be continuously converting during this time.
requiring less than an 5MHz sampling rate, wider start convert pulses can be used.
NOTE: The device only requires the rising edge of a start convert pulse to operate.
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
Output Data Valid
Output Data Valid
+5V Supply
–5V Supply
+5V Supply
–5V Supply
( to ±0.001%FSR, 10V step)
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, 18, and 23) directly to a
large analog ground plane beneath the package.
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.
external calibration. If required, the device’s small initial offset and gain
®
+4.75
–4.75
+2.4
MIN.
—
—
—
—
—
—
—
—
—
—
—
5
®
• 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: [phone] • www.datel.com • e-mail: [e-mail]
+25°C
+205
–180
+5.0
–5.0
200
TYP.
1.8
85
—
—
—
—
—
—
—
—
+5.25
–5.25
+220
–205
+0.4
±0.1
MAX.
2.1
+4
90
—
—
—
–4
20
10
+4.75
–4.75
+2.4
MIN.
—
—
—
—
—
—
—
—
—
—
—
5
3. To enable the three-state outputs, connect ENABLE (pin 17) to a logic
4. Applying a start convert pulse while a conversion is in progress (EOC =
➃ Effective bits is equal to:
➄ This is the time required before the A/D output data is valid once the analog input is
➅ The minimum supply voltages of +4.9V and –4.9V for ±V
(SNR + Distortion) – 1.76 + 20 log
12-Bit, 5MHz, Low-Power Sampling A/D Converters
Offset Binary
errors can be reduced to zero using the adjustment circuitry shown in
Figures 2a and 2b. For operation without adjustment, tie pin 17 to analog
ground. When using this circuitry, or any similar offset and gain-calibration
hardware, make adjustments following warmup. To avoid interaction,
always adjust offset before gain.
"0" (low). To disable, connect pin 17 to logic "1" (high). The three-state
outputs are permanently enabled in the ADS-118A.
logic "1") will initiate a new and inaccurate conversion cycle.
0 to +70°C
back within the specifi ed range.
at +125°C
–55°C operation only. The minimum limits are +4.75V and –4.75V when operating
+205
–180
+5.0
–5.0
200
TYP.
1.8
85
—
—
—
—
—
—
—
—
+5.25
–5.25
+220
–205
+0.4
±0.1
MAX.
2.1
90
—
—
—
–4
+4
20
10
ADS-118, ADS-118A
6.02
+2.4
+4.9
–4.9
MIN.
—
—
—
—
—
—
—
—
—
—
—
5
–55 to +125°C
Actual Input Amplitude
Full Scale Amplitude
31 Mar 2011 ADS-118.B03 Page 3 of 8
+205
–180
+5.0
–5.0
200
TYP.
1.8
85
—
—
—
—
—
—
—
—
+5.25
–5.25
+220
–205
+0.4
±0.1
DD
MAX.
2.1
+4
90
—
—
—
–4
20
10
are required for
%FSR/%V
UNITS
Watts
Volts
Volts
Volts
Volts
MHz
MHz
MHz
mA
mA
mA
mA
ns
ns