MAX1254AEUE+ Maxim Integrated, MAX1254AEUE+ Datasheet - Page 13

• Manufacturer Part Number: MAX1254AEUE+
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1254AEUE+

• Number Of Channels: 10
• Architecture: SAR
• Conversion Rate: 94 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended/Differential
• Interface Type: Serial
• Operating Supply Voltage: 4.5 V to 5.5 V
• Number Of Converters: 1
• Voltage Reference: Internal 4.096 V or External

In differential mode, the T/H samples the difference
between two analog inputs, eliminating common-mode
DC offsets and noise. See the Input Configuration
Register section and Tables 5 and 6 for more details on
configuring the analog inputs.
When performing differential conversions, the input
configuration register (Tables 5 and 6) also selects
between unipolar and bipolar operation. Unipolar mode
sets the differential input range from 0 to V
tive differential analog input in unipolar mode causes
the digital output code to be zero. Selecting bipolar
mode sets the differential input range to ±V
digital output code is straight binary in unipolar mode
and two’s complement in bipolar mode (see the
Transfer Function section).
In single-ended mode, the MAX1253/MAX1254 always
operate in unipolar mode. The analog inputs are inter-
nally referenced to GND with a full-scale input range
from 0 to V
Figure 5. Single-Ended/Differential Input Equivalent Input Circuit
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
with Internal Temperature Sensor and V
Stand-Alone, 10-Channel, 12-Bit System Monitors
DIFFERENTIAL
DIFFERENTIAL INPUT EQUIVALENT INPUT CIRCUIT
8-TO-1
TEMP
REF.
MUX
V
DD
______________________________________________________________________________________
H
T
T
H
CHOLDP
CHOLDN
T
V
AZ
T
Unipolar/Bipolar
H
REF.
REF
ADC
A nega-
/2. The
The MAX1253/MAX1254 digital interface consists of
five signals: CS, SCLK, DIN, DOUT, and INT. CS,
SCLK, DIN, and DOUT comprise an SPI™-compatible
serial interface (see the Serial Digital Interface section).
INT is an independent output that provides an indica-
tion that an alarm has occurred in the system (see the
INT Interrupt Output section).
The MAX1253/MAX1254 feature a serial interface com-
patible with SPI, QSPI™, and MICROWIRE™ devices.
For SPI/QSPI, ensure that the CPU serial interface runs
in master mode so it generates the serial clock signal.
Select a serial clock frequency of 10MHz or less, and
set clock polarity (CPOL) and phase (CPHA) in the µP
control registers to the same value, one or zero. The
MAX1253/MAX1254 support operation with SCLK idling
high or low, and thus operate with CPOL = CPHA = 0 or
CPOL = CPHA = 1.
DIFFERENTIAL
SINGLE-ENDED INPUT EQUIVALENT INPUT CIRCUIT
8-TO-1
TEMP
MUX
V
DD
H
T
CHOLD
Serial Digital Interface
Digital Interface
DD
T
V
AZ
Monitor
H
ADC
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