MAX111ACPE+ Maxim Integrated, MAX111ACPE+ Datasheet - Page 16

• Manufacturer Part Number: MAX111ACPE+
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX111ACPE+

• Number Of Channels: 2
• Architecture: Sigma-Delta
• Conversion Rate: 0.05 KSPs
• Resolution: 14 bit
• Input Type: Single-Ended/Differential
• Snr: No
• Interface Type: Microwire, QSPI, Serial, SPI
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-16
• Maximum Power Dissipation: 842 mW
• Minimum Operating Temperature: 0 C
• Number Of Converters: 1
• Voltage Reference: External

Low-Cost, 2-Channel, ±14-Bit Serial ADCs
Table 3. Procedure to Calibrate the ADC
16
Table 2. Allowable Input Multiplexer Configurations
X = Don't Care
X = Don't Care
CAL
STEP
X
0
0
0
0
1
1
1
2
3
______________________________________________________________________________________
NUL
0
0
1
1
1
0
X
Sets the new conversion speed (if required)
and performs an offset correction conversion
with the internal ADC inputs shorted to REF-.
The result is stored in the null register.
(This step also selects the speed/resolution
for the ADC.)
Performs a gain-calibration conversion with
the null register contents as the starting value.
The result is stored in the calibration register.
Performs an offset-null conversion with the
internal ADC inputs shorted to the selected
input channel's negative input (IN1- or IN2-).
The next operation performs the first signal
conversion with the new setup.
CHS
X
X
X
0
1
0
1
N N O O - - O O P P
1
1
1
1
1
1
0
DESCRIPTION
ADC IN+
Change
REF+
IN1+
IN2+
REF-
IN1-
IN2-
No
ADC IN-
Change
REF-
REF-
IN1-
IN2-
IN1-
IN2-
No
Channel 1 connected to ADC inputs. Conversion begins when CS returns high.
Channel 2 connected to ADC inputs. Conversion begins when CS returns high.
IN1- connected to the ADC inputs; offset-null mode selected. Autonull conversion
begins when CS returns high, and the results are stored in the null register.
IN2- connected to the ADC inputs; offset-null mode selected. Autonull conversion
begins when CS returns high, and the results are stored in the null register.
REF- connected to the ADC inputs; offset-null mode selected. Autonull conversion
begins when CS returns high, and the results are stored in the null register.
REF+ and REF- connected to the ADC inputs; gain-calibration mode
selected. Autocal conversion begins when CS returns high, and the results are
stored in the 16-bit I/O register.
Input control word is not transferred to the control register. ADC
configuration remains unchanged and no new conversion starts when CS
returns high.
N N O O - - O O P P
1
1
1
Used
Not
00
00
00
CONV1-
CONV4
Change
Change
New
Data
No
No
DV2 &
DESCRIPTION
DV4
CONTROL WORD
XX
XX
XX
Used
Not
00
00
00
CHS
or
X
X
0
1
CAL
1
1
0
NUL
1
0
1
PDX
0
0
0
PD
0
0
0