MAX1098/MAX1099
10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
General Description
The MAX1098/MAX1099 implement both local and
remote temperature sensing with 10-bit resolution, using
+5V and +3V supply voltages, respectively. Accuracy
is ±1°C from 0°C to +70°C, with no calibration needed.
The devices feature an algorithmic switched-capacitor
analog-to-digital converter (ADC), on-chip clock, and
3-wire serial interface compatible with SPI, QSPI™, and
MICROWIRE®.
The MAX1098/MAX1099 also perform fully differential
voltage measurements with 10-bit resolution and separate
track-and-hold (T/N) for positive and negative inputs. Both
devices accept versatile input modes consisting of two
3-channel signal pairs, five 1-channel signals relative to
AIN5, or VDD/4 relative to ground. An external reference
may be used for more accurate voltage measurements.
Typical power consumption is only 1.3mW (MAX1099). A
shutdown mode and two standby modes provide multiple
strategies for prolonging battery life in portable applica-
tions that require limited sampling throughput.
The MAX1098/MAX1099 are available in 16-pin SSOP
packages.
Applications
●● Temperature/Voltage Supervision of
Workstations and Communications Equipment
●● Hand-Held Instruments
●● Medical Equipment
●● Industrial Process Control
Pin Configuration
TOP VIEW
+
AIN1 1
SHO 2
AIN2 3
AIN3 4
AIN4 5
MAX1098
MAX1099
GND 6
SSTRB 7
CS 8
16 AIN0
15 AIN5
14 REF
13 GND
12 VDD
11 SCLK
10 DIN
9 COUT
SSOP
Typical Operating Circuit appears at end of data sheet.
Features
●● Local and Remote Temperature Sensing
●● 12-Bit Resolution for Temperature and 10-Bit
Resolution for Voltage Inputs
●● ±1°C Accuracy from -40°C to +85°C
●● Fully Differential Inputs
●● Single-Supply Operation
• +4.75V to +5.25V (MAX1098)
• +2.7V to +3.6V (MAX1099)
●● 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface
●● Internal Precision Voltage Reference
• 2.50V (MAX1098)
• 1.20V (MAX1099)
●● Space-Saving 16-Pin SSOP Package
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TEMP. SENSE
ACCURACY
(°C)
MAX1098CEAE+ -40°C to +85°C 16 SSOP
MAX1099CEAE+ -40°C to +85°C 16 SSOP
±4.0
±4.0
+Denotes a lead(Pb)-free/RoHS-compliant package.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
Temperature Error
MAX1098
TEMPERATURE ERROR
vs. INTERNAL DIODE TEMPERATURE
1.0
0.5
0
-0.5
-1.0
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
19-1728; Rev 1; 3/12
