MAX1303BEUP-T Maxim Integrated, MAX1303BEUP-T Datasheet - Page 25

• Manufacturer Part Number: MAX1303BEUP-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1303BEUP-T

• Number Of Channels: 4/2
• Architecture: SAR
• Conversion Rate: 115 KSPs
• Resolution: 16 bit
• Input Type: Single-Ended/Differential
• Snr: 90 dB
• Interface Type: Microwire, QSPI, Serial, SPI
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-24
• Maximum Power Dissipation: 879 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: Internal, External

Additional samples can be taken and averaged (over-
sampling) to remove the effect of transition noise on
conversion results. The square root of the number of
samples determines the improvement in performance.
For example, with 2/3 LSB
noise, 16 (4
the noise to 1 LSB
Figure 18 illustrates a simple interface between the
MAX1303 and a 4–20mA signal. 4–20mA signaling can
be used as a binary switch (4mA represents a logic-low
Figure 17. External Reference Operation
Figure 18. Bridge Application
2
= 16) samples must be taken to reduce
Applications Information
Interface with 4–20mA Signals
P-P
______________________________________________________________________________________
.
MAX1303
ADC REF
SAR
REFERENCE
BANDGAP
4-Channel, ±V
RMS
4.096V
BRIDGE
5kΩ
(4 LSB
Noise Reduction
4.096V
1x
P-P
) transition
DIFFERENTIAL
LOW-OFFSET
AMPLIFIER
V
REFCAP
CH0
CH1
REF
RCTH
AGND1
REF
signal, 20mA represents a logic-high signal), or for pre-
cision communication where currents between 4mA
and 20mA represent intermediate analog data. For
binary switch applications, connect the 4–20mA signal
to the MAX1303 with a resistor to ground. For example,
a 200Ω resistor converts the 4–20mA signal to a 0.8V to
4V signal. Adjust the resistor value so the parallel com-
bination of the resistor and the MAX1303 source
impedance is 200Ω. In this application, select the sin-
gle-ended 0V to V
For applications that require precision measurements
of continuous analog currents between 4mA and 20mA,
use a buffer to prevent the MAX1303 input from divert-
ing current from the 4–20mA signal.
MAX1303
REF
AVDD1
1.0µF
Multirange Inputs,
Serial 16-Bit ADC
OUT
REF
MAX6341
µP
GND
V+
IN
range (R[2:0] = 011, Table 6).
1.0µF
25