MAX1298 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 12-Bit Serial-Output Temperature Sensors with 5-Channel ADC

19-1726; Rev 0; 5/00
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
General Description
The MAX1298/MAX1299 implement local and remote
temperature sensing with 12-bit resolution, using +5V
and +3V supply voltages, respectively. Accuracy is
±1°C from 0 to +70°C, with no calibration needed. The
devices feature an algorithmic switched-capacitor ana-
log-to-digital converter (ADC), an on-chip clock, and a
3-wire serial interface compatible with SPI™, QSPI™,
and MICROWIRE™.
The MAX1298/MAX1299 also perform fully differential
voltage measurements with 12-bit resolution and sepa-
rate track-and-hold (T/H) 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 V_DD/4 relative to
ground. An external reference may be used for more
accurate voltage measurements.
Typical power consumption is only 1.3mW (MAX1299).
A shutdown mode and two standby modes provide
multiple strategies for prolonging battery life in portable
applications that require limited sampling throughput.
The MAX1298/MAX1299 are available in 16-pin SSOP
packages.
________________________Applications
Temperature/Voltage Supervision of
Workstations and Communications Equipment
Hand-Held Instruments
Medical Equipment
Industrial Process Control
Features
o Local and Remote Temperature Sensing
o 12-Bit Resolution for Temperature and 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 (MAX1298)
+2.7V to +3.6V (MAX1299)
o 3-Wire SPI/QSPI/MICROWIRE-Compatible
Interface
o Internal Precision Voltage Reference
2.50V (MAX1298)
1.20V (MAX1299)
o Space-Saving 16-Pin SSOP Package
Ordering Information
PART
TEMP.
RANGE
TEMP. SENSE
PIN-
PACKAGE
ACCURACY
(°C)
MAX1298AEAE -40°C to +85°C 16 SSOP
MAX1298BEAE* -40°C to +85°C 16 SSOP
MAX1298CEAE -40°C to +85°C 16 SSOP
MAX1299AEAE -40°C to +85°C 16 SSOP
MAX1299BEAE* -40°C to +85°C 16 SSOP
MAX1299CEAE -40°C to +85°C 16 SSOP
*Future product—contact factory for availability.
±0.75
±1.0
±4.0
±0.75
±1.0
±4.0
Pin Configuration
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.
TOP VIEW
AIN1 1
SHO 2
AIN2 3
AIN3 4
AIN4 5
GND 6
SSTRB 7
CS 8
MAX1298
MAX1299
SSOP
16 AIN0
15 AIN5
14 REF
13 GND
12 V_DD
11 SCLK
10 DIN
9 DOUT
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