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PDF MAX1098 Data sheet ( Hoja de datos )

Número de pieza MAX1098
Descripción 10-Bit Serial-Output Temperature Sensors with 5-Channel ADC
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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No Preview Available ! MAX1098 Hoja de datos, Descripción, Manual

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.

1 page




MAX1098 pdf
10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
TIMING 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.) (Figures 4, 6)
PARAMETER
SCLK Frequency
SCLK Pulse Width Low
SCLK Pulse Width High
CS Low to SCLK High
SCLK High to CS Setup
CS Pulse Width
SCLK High to CS Low Setup
SCLK High to CS High Setup
DIN Setup to SCLK High Time
DIN Hold Time
SCLK Fall to Output Data Valid
CS Fall to Output Enable
CS Rise to Output Disable
SSTRB Rise to SCLK Rise
SCLK Fall to SSTRB Fall
SYMBOL
fSCLK
tCL
tCH
tCSS
tCSH
tCS
tCS0
tCS1
tDS
tDH
tDO
tDV
tTR
tSCLK
tSSTRB
CONDITIONS
RL = 100k, CL = 50pF
RL = 100k, CL = 50pF
RL = 100k, CL = 50pF
MIN TYP MAX UNITS
2.5 MHz
200 ns
200 ns
100 ns
100 ns
100 ns
50 ns
100 ns
100 ns
0 ns
150 ns
150 ns
50 ns
0 ns
200 ns
Note 1: Tested at VDD = +5.0V (MAX1098) and VDD = +3.0V (MAX1099).
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
been calibrated.
Note 3: Conversion time is defined as the number of clock cycles (64 for voltage measurements, 125 for temperature measure-
ments) multiplied by the internal clock period.
Note 4: Individual analog input voltages cannot extend beyond the power-supply rails.
Note 5: Input resistance is typically 250M; 5µA limit reflects limitations in production testing.
Note 6: Specifications for full-on status assume continuous conversions. Power modes are software selected (Table 3).
Note 7: Measured at VFS(+4.75V) - VFS(+5.25V) for the MAX1098 and at VFS(+2.7V) - VFS(+3.6V) for the MAX1099.
Note 8: External load should not change during conversions for specified accuracy.
Note 9: Excludes noise and self-heating effects. Output error for MAX109_C guaranteed by design.
Note 10:External temperature sensing over -40°C to +85°C range, device at +25°C. Guaranteed by design.
________________________________________________________________________________________ 5

5 Page





MAX1098 arduino
10-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
CS
SCLK
DIN
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
DIODE
BIAS
CONTROL
INPUT
REGISTER
CONTROL
LOGIC
INPUT
MUX
T/H
T/H
VDD/4
SHIELD
OUTPUT
OUTPUT
REGISTER
DOUT
CLOCK
IN+
ADC
IN-
REF
VDD
GND
SHO REF
Figure 1. MAX1098/MAX1099 Functional Diagram
Detailed Description
The MAX1098/MAX1099 are low-power, serial-output,
multichannel ADCs with temperature-sensing capability
for thermostatic, process-control, and monitoring appli-
cations. An algorithmic switched-capacitor converter
with T/H circuitry for both positive and negative inputs
supports fully differential 10-bit conversions from an
internal temperature sensor, two external temperature
sensors, or voltage sources in a variety of channel con-
figurations. Microprocessor (µP) control is made easy
through a flexible 3-wire serial interface.
Figure 1 shows a simplified functional diagram of the
MAX1098/MAX1099 internal architecture. In tempera-
ture-sensing mode, the multiplexer (mux) steers bias
currents through internal or external diodes while the
ADC computes their temperature in relation to changes
in forward voltage. Channels not used for temperature
measurement can be configured to measure other sys-
tem voltages.
_______________________________________________________________________________________ 11

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