MAX1204AEPP Maxim Integrated, MAX1204AEPP Datasheet - Page 19

• Manufacturer Part Number: MAX1204AEPP
• Description: Analog to Digital Converters - ADC Integrated Circuits (ICs)
• Manufacturer: Maxim Integrated

Specifications of MAX1204AEPP

• Number Of Channels: 8/4
• Architecture: SAR
• Conversion Rate: 133 KSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: 66 dB
• Interface Type: 4-Wire (SPI, Microwire, TMS320)
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Package / Case: PDIP N
• Maximum Power Dissipation: 640 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Factory Pack Quantity: 18
• Voltage Reference: 4.096 V

Figure 14a. MAX1204 Supply Current vs. Sample Rate/Second,
FULLPD, 400kHz Clock
Figure 14b. MAX1204 Supply Current vs. Sample Rate/Second,
FASTPD, 2MHz Clock
Figure 17, the Reference-Adjust Circuit, shows how to
adjust ADC gain in applications that use the internal
reference. The circuit provides ±1.5% (±16 LSBs) of
gain-adjustment range.
Maxim Integrated
10,000
1000
1000
100
100
10
10
1
0
0
2ms FASTPD WAIT
400kHz EXTERNAL CLOCK
INTERNAL COMPENSATION
50
2k
CONVERSIONS PER CHANNEL PER SECOND
CONVERSIONS PER CHANNEL PER SECOND
8 CHANNELS
100
4k
150
FAST POWER-DOWN
FULL POWER-DOWN
6k
200
8k
250
2MHz EXTERNAL CLOCK
EXTERNAL COMPENSATION
50µs WAIT
10k
300
12k
5V, 8-Channel, Serial, 10-Bit ADC
350
8 CHANNELS
14k
1 CHANNEL
1 CHANNEL
400
16k
450
500
18k
with 3V Digital Interface
For best performance, use printed circuit boards.
Wire-wrap boards are not recommended. Board layout
should ensure that digital and analog signal lines are
separated from each other. Do not run analog and digital
(especially clock) lines parallel to one another, or digital
lines underneath the ADC package.
Figure 18 shows the recommended system-ground con-
nections. Establish a single-point analog ground (star
ground point) at GND. Connect all other analog grounds
to this ground. No other digital system ground should be
connected to this single-point analog ground. The
ground return to the power supply should be low imped-
ance and as short as possible for noise-free operation.
High-frequency noise in the V
the high-speed comparator in the ADC. Bypass these
supplies to the single-point analog ground with 0.1µF and
4.7µF bypass capacitors close to the MAX1204. Minimize
capacitor lead lengths for best supply-noise rejection. If
the +5V power supply is very noisy, a 10Ω resistor can
be connected as a lowpass filter, as shown in Figure 18.
Figure 14c. Typical Power-Up Delay vs. Time in Shutdown
3.0
2.5
2.0
1.5
1.0
0.5
0
0.0001
Layout, Grounding, Bypassing
0.001
TIME IN SHUTDOWN (sec)
0.01
DD
power supply may affect
MAX1204
0.1
1
10
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