MAX110EVC32-DIP Maxim Integrated Products, MAX110EVC32-DIP Datasheet - Page 8

• Manufacturer Part Number: MAX110EVC32-DIP
• Description: EVAL KIT FOR MAX110
• Manufacturer: Maxim Integrated Products

Specifications of MAX110EVC32-DIP

• Number Of Adc's: 1
• Number Of Bits: 14
• Sampling Rate (per Second): 50
• Data Interface: Serial
• Inputs Per Adc: 2 Differential
• Input Range: ±VREF
• Power (typ) @ Conditions: 4.35mW @ 50SPS
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX110, MAX111
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Complete source code for both MAX110.EXE and
110CODE.MAX is provided on disk. MAX110.EXE was
written using Borland C++ version 3.0, and
110CODE.MAX was written using the Avocet 8051
Macro Assembler.
The most relevant subroutine in 110CODE.ASM is
Config110 (see Listing 1). This subroutine writes the
configuration word while simultaneously reading the
data from the MAX110 EV kit. Note that the configura-
tion word does not take effect until the next read/write
operation. Macros have been used to help make the
subroutine easier to understand.
Figures 1 and 2 show the timing specifications. The
80C32 module uses an 11.0592MHz clock, so the
instruction cycle time is 1.085µs per instruction cycle.
SCK must be low before
width is 4.35µs, with period 17.33µs. The most signifi-
cant bit is sent first. Configuration data is valid 1.14µs
before the rising edge of SCK. Data from the MAX110
is sampled while SCK is high.
The communication protocol used between MAX110.EXE
and 110CODE is very simple. MAX110.EXE sets up a
MAX110 Evaluation System/Evaluation Kit
8
Table 10. Data-Connector Interface
_______________________________________________________________________________________
PIN No.
1–4
7, 8
27
28
29
30
31
80C32
–
C
GND
—
P1.0
P1.1
P1.2
P1.3
P1.4
+5V
S
–
is activated. SCK’s pulse
Source Code
MAX110
DOUT
–
B
GND
—
SCK
+5V
DIN
–
C
U
—
—
S
S
–
—
Y
–
Ground
+5V Supply to MAX110 EV Kit
Active-Low Chip Select to MAX110
Rising-Edge Clock Input to MAX110
Serial Data Input to MAX110
Serial Data Output from MAX110
Active-Low Busy Output from MAX110
configuration word by sending “Cxxxx”, where xxxx
represents the hexadecimal configuration word value.
MAX110.EXE then sends the “R” command, which
writes and reads the MAX110, and prints the hexadeci-
mal value it reads from the EV kit.
Note that the RAM resident code 110CODE.MAX resets
the MAX110 EV kit by sending three configuration bytes
in order: 8C8Ch, 8C88h, and 8C80h. These configura-
tion words reset the MAX110 by turning on auto-null
and gain-calibration mode together, then turning off
auto null, and finally turning off gain calibration. The
MAX110 internally divides the 1.024MHz crystal oscilla-
tor clock by two, for an effective clock of 512kHz. The
program uses the 16-bit resolution mode, unless other-
wise instructed by the user.
Source files SERCMD.C and MAX110.C form the core
interface to the MAX110 EV kit. To write your own pro-
grams using these files, read example programs
SIMPLE.C and NOISE.CPP, and the header files
SERCMD.H and MAX110.H. Both SERCMD and
MAX110 may be compiled under C or C++.
FUNCTION