MAX1243BCSA Maxim Integrated Products, MAX1243BCSA Datasheet - Page 39

• Manufacturer Part Number: MAX1243BCSA
• Description: ADC (A/D Converters) Integrated Circuits (ICs)
• Manufacturer: Maxim Integrated Products

Specifications of MAX1243BCSA

• Number Of Adc Inputs: 1
• Architecture: SAR
• Conversion Rate: 73 KSPs
• Resolution: 10 bit
• Input Type: Voltage
• Interface Type: 3-Wire (SPI, QSPI, Microwire)
• Voltage Reference: External
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Maximum Power Dissipation: 471 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SO-8
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: No

For best performance, use PC boards. Ensure that digital
and analog signal lines are separated from each other.
Do not run analog and digital signals parallel to one
another (especially clock signals) or do not run digital
lines underneath the MAX1221/MAX1223/MAX1343
package. High-frequency noise in the AV
ply may affect performance. Bypass the AV
with a 0.1µF capacitor to AGND, close to the AV
Bypass the DV
DGND, close to the DV
lengths for best supply-noise rejection. If the power sup-
ply is very noisy, connect a 10Ω resistor in series with the
supply to improve power-supply filtering.
The MAX1221/MAX1223/MAX1343 thin QFN packages
contain an exposed pad on the underside of the device.
Connect this exposed pad to AGND. Refer to the
MAX1258EVKIT for an example of proper layout.
Figure 13. GPIO Timing
Figure 14. LDAC Functionality
OUT_
LDAC
CS
GPIO INPUT/OUTPUT
Layout, Grounding, and Bypassing
12-Bit, Multichannel ADCs/DACs with FIFO,
DD
______________________________________________________________________________________
supply with a 0.1µF capacitor to
DD
Temperature Sensing, and GPIO Ports
t
pin. Minimize capacitor lead
GSU
DD
power sup-
DD
t
LDACPWL
DD
supply
pin.
t
GOD
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the end points of the transfer function,
once offset and gain errors have been nullified. INL for
the MAX1221/MAX1223/MAX1343 is measured using
the end-point method.
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1 LSB. A
DNL error specification of less than 1 LSB guarantees
no missing codes and a monotonic transfer function.
For an ideal converter, the first transition occurs at 0.5
LSB, above zero. Offset error is the amount of deviation
between the measured first transition point and the
ideal first transition point.
t
S
Unipolar ADC Offset Error
Differential Nonlinearity
Integral Nonlinearity
Definitions
±1 LSB
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