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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX1098

10-Bit Serial-Output Temperature Sensors with 5-Channel ADC


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MAX1098 pdf
19-1728; Rev 0; 7/00
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 calibra-
tion 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 sepa-
rate track-and-hold (T/N) for positive and negative
inputs. Both devices accept versatile input modes con-
sisting of two 3-channel signal pairs, five 1-channel sig-
nals relative to a floating common, 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
applications 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
GND 6
SSTRB 7
CS 8
MAX1098
MAX1099
16 AIN0
15 AIN5
14 REF
13 GND
12 VDD
11 SCLK
10 DIN
9 COUT
Features
o Local and Remote Temperature Sensing
o 12-Bit Resolution for Temperature and
10-Bit Resolution for Voltage Inputs
o ±1°C Accuracy from -40°C to +85°C
o Fully Differential Inputs
o Single-Supply Operation
+4.75V to +5.25V (MAX1098)
+2.7V to +3.6V (MAX1099)
o 3-Wire SPI/QSPI/MICROWIRE-Compatible
Interface
o Internal Precision Voltage Reference
2.50V (MAX1098)
1.20V (MAX1099)
o Space-Saving 16-Pin SSOP Package
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
TEMP. SENSE
ACCURACY
(°C)
MAX1098AEAE* -40°C to +85°C
MAX1098BEAE* -40°C to +85°C
MAX1098CEAE -40°C to +85°C
MAX1099AEAE* -40°C to +85°C
MAX1099BEAE* -40°C to +85°C
MAX1099CEAE -40°C to +85°C
16 SSOP
16 SSOP
16 SSOP
16 SSOP
16 SSOP
16 SSOP
±0.75
±1.0
±4.0
±0.75
±1.0
±4.0
*Future product—contact factory for availability.
Temperature Error
MAX1098
TEMPERATURE ERROR
vs. INTERNAL DIODE TEMPERATURE
1.0
0.5
0
SSOP
-0.5
Typical Operating Circuit appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
-1.0
-60 -40 -20 0 20 40 60
TEMPERATURE (°C)
80 100
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.



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MAX1098 pdf
10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
ABSOLUTE MAXIMUM RATINGS
VDD to GND.……………………………………………-0.3V to +6V
SHO to GND ................................................-0.3V to (VDD +0.3V)
Analog Inputs to GND
(AIN0AIN5, REF)...................................-0.3V to (VDD +0.3V)
Digital Inputs to GND (DIN, SCLK, CS).......-0.3V to (VDD +0.3V)
Digital Outputs to GND (DOUT, SSTRB) .....-0.3V to (VDD +0.3V)
Digital Output Sink Current ..…………………………………25mA
Maximum Current into Any Pin……………………………….50mA
Continuous Power Dissipation (TA = +70°C)
16-Pin SSOP (derate 8.00mW/°C above +70°C) ........667mW
Operating Temperature Range
MAX109_ _EAE ...............................................-40°C to +85°C
Junction Temperature....……………………………………+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +4.75V to +5.25V (MAX1098), VDD = +2.7V to +3.6V (MAX1099), external reference, VREF = +2.5V (MAX1098), VREF = +1.2V
(MAX1099), fSCLK = 2.5MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC ACCURACY (Note 1)
Resolution
RES
10 Bits
Relative Accuracy (Note 2)
Differential Nonlinearity
Offset Error
INL
DNL
Inputs AIN0AIN5
±1 LSB
±1 LSB
±1 LSB
Offset Temperature Coefficient
Gain Error
Inputs AIN0AIN5, offset nulled
±10 µV/°C
±1 LSB
VDD/4 Absolute Error
Gain Temperature Coefficient
±1 LSB
±2 ppm/°C
Channel-to-Channel Offset
Matching
±0.25
LSB
CONVERSION RATE
Conversion Time (Note 3)
tCONV
Voltage measurement
Temperature measurement
1.1
ms
2.2
Track/Hold Acquisition Time
Aperture Delay
Internal Clock Frequency
ANALOG INPUTS (AIN0AIN5)
tACQ
tAPR
fCLK
57.6
16
30
62.3
65.5
µs
ns
kHz
Input Voltage Range (Note 4)
Common-Mode Range
Input Current (Note 5)
Measurement with respect to IN-, Figure 1
-2VREF
0
+2VREF
VDD
0.1 5
V
V
µA
Input Capacitance
16 pF
2 _______________________________________________________________________________________



Part Number MAX1098
Description 10-Bit Serial-Output Temperature Sensors with 5-Channel ADC
Maker Maxim - Maxim
Total Page 20 Pages
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