MAX1247EVL11-QSOP Maxim Integrated Products, MAX1247EVL11-QSOP Datasheet - Page 3

• Manufacturer Part Number: MAX1247EVL11-QSOP
• Description: EVALUATION KIT FOR MAX1247 QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1247EVL11-QSOP

• Number Of Adc's: 1
• Number Of Bits: 12
• Sampling Rate (per Second): 133k
• Data Interface: Serial
• Inputs Per Adc: 4 Single or 2 Differential
• Input Range: ±VREF/2
• Power (typ) @ Conditions: 9mW @ 133kSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1247
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 2. Jumper Settings
*Note: Jumpers JU5 and JU6 should not both be closed.
The MAX872 is a micropower 2.5V reference supplied
with the MAX1247 EV kit.
The MAX495 is a low-voltage Rail-to-Rail
a 500kHz gain-bandwidth product. The MAX495
buffers the external COM input source.
The MAX393 analog switch allows the EV kit software to
route the MAX1246/MAX1247 COM pin to ground or to
the external COM input. In addition, the external COM
input can be routed to input channel 0. Typical systems
connect COM directly to analog ground or the analog
common voltage.
To supply a different external reference, open JU2 and
apply the reference voltage between VREF and GND or
J10 (REFADJ) and GND. Refer to the MAX1246/
MAX1247 data sheet for additional information.
The EV kit has an RC filter on each input with a time
constant ( ) of 10µs. The MAX1246/MAX1247’s acquisi-
tion time with a 1MHz clock is 3µs.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
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JUMPER
JU5*
JU6*
JU1
JU2
JU2
JU3
JU4
Changing the Reference Voltage
STATE
Closed
Closed
Closed
Closed
Closed
Closed
Open
Open
Open
Open
Open
Open
_______________________________________________________________________________________
MAX1246/MAX1247 Evaluation Systems
Detailed Description
Drive SHDN pin with pin 34 of the µC module.
Force SHDN to float.
REFADJ = V
REFADJ = Open. Enable the internal reference buffer. Refer to the MAX1246/MAX1247 data sheet for
additional information.
Current-sense jumper (in series with V
Do not operate the kit with JU3 open. Supply current may be measured by cutting JU3 open and
connecting a current meter across JU3.
Drive the COM pin with buffer U4.
COM disconnected from U4; COM must be driven directly by the user.
VREF = MAX872 reference (MAX872 not supplied with MAX1246 EV kit).
MAX872 disconnected from the MAX1247’s VREF input.
VREF = V
V
DD
disconnected from the VREF input.
DD
Input Filtering
DD
. Disable the internal reference buffer (see JU5 and JU6 settings).
®
op amp with
DD
The RC filter’s settling time may increase the acquisi-
tion time required for full accuracy when switching
input channels.
The software allows all features of the MAX1246/
MAX1247 to be exercised. Refer to Tables 3 and 4 for a
complete listing of available features.
The EV kit default software program (“KIT1247.L11”)
that is loaded into the 68L11D module operates at a
throughput rate of 6.41ksps. For faster throughput,
download the program “FAST1247.L11” at step 9 of the
Quick Start section. This program has a throughput rate
of approximately 13ksps.
Listing 1 shows an example of interfacing the MAX1246/
MAX1247 to the 68HC11 processor.
)
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FUNCTION
Detailed Description
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