MAX1299CEAE+ Maxim Integrated Products, MAX1299CEAE+ Datasheet

IC TEMP SENS W/ADC 16-SSOP

MAX1299CEAE+

Manufacturer Part Number
MAX1299CEAE+
Description
IC TEMP SENS W/ADC 16-SSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1299CEAE+

Function
Temp Monitoring System (Sensor)
Topology
ADC, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 85°C, External Sensor
Output Type
MICROWIRE™, QSPI™, SPI™
Output Alarm
No
Output Fan
No
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SSOP
Full Temp Accuracy
+/- 1 C
Digital Output - Bus Interface
Serial (3-Wire)
Digital Output - Number Of Bits
12 bit
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
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.
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.
19-1726; Rev 0; 5/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________Applications
Typical Operating Circuit appears at end of data sheet.
Temperature/Voltage Supervision of
Workstations and Communications Equipment
Hand-Held Instruments
Medical Equipment
Industrial Process Control
12-Bit Serial-Output Temperature Sensors
________________________________________________________________ Maxim Integrated Products
General Description
DD
/4 relative to
o Local and Remote Temperature Sensing
o 12-Bit Resolution for Temperature and Voltage
o ±1°C Accuracy from -40°C to +85°C
o Fully Differential Inputs
o Single-Supply Operation
o 3-Wire SPI/QSPI/MICROWIRE-Compatible
o Internal Precision Voltage Reference
o Space-Saving 16-Pin SSOP Package
*Future product—contact factory for availability.
MAX1298AEAE -40°C to +85°C
MAX1298BEAE* -40°C to +85°C
MAX1298CEAE -40°C to +85°C
MAX1299AEAE -40°C to +85°C
MAX1299BEAE* -40°C to +85°C
MAX1299CEAE -40°C to +85°C
Inputs
Interface
+4.75V to +5.25V (MAX1298)
+2.7V to +3.6V (MAX1299)
2.50V (MAX1298)
1.20V (MAX1299)
PART
TOP VIEW
with 5-Channel ADC
SSTRB
AIN1
AIN2
AIN3
AIN4
SHO
GND
CS
RANGE
TEMP.
1
2
6
3
4
5
7
8
Ordering Information
MAX1298
MAX1299
SSOP
Pin Configuration
PIN-
PACKAGE
16 SSOP
16 SSOP
16 SSOP
16 SSOP
16 SSOP
16 SSOP
16
15
14
13
12
11
10
9
AIN0
AIN5
REF
GND
V
SCLK
DIN
DOUT
DD
Features
TEMP. SENSE
ACCURACY
±0.75
±0.75
±1.0
±4.0
±1.0
±4.0
(°C)
1

Related parts for MAX1299CEAE+

MAX1299CEAE+ Summary of contents

Page 1

... 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. ________________________________________________________________ Maxim Integrated Products 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. with 5-Channel ADC ...

Page 2

Serial-Output Temperature Sensors with 5-Channel ADC ABSOLUTE MAXIMUM RATINGS V to GND.……………………………………………-0.3V to +6V DD SHO to GND ...............................................-0. Analog Inputs to GND (AIN0, AIN1, AIN2, AIN3, AIN4, AIN5, REF).............................................-0. CS)......-0. Digital Inputs ...

Page 3

Serial-Output Temperature Sensors ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V (MAX1298 (MAX1299 2.5MHz SCLK A MIN PARAMETER SYMBOL DIGITAL INPUTS Input Voltage Low Input Voltage High Input Hysteresis V Input ...

Page 4

Serial-Output Temperature Sensors with 5-Channel ADC ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V (MAX1298 (MAX1299 2.5MHz SCLK A MIN PARAMETER SYMBOL EXTERNAL VOLTAGE REFERENCE CHARACTERISTICS Reference Voltage Range V REF ...

Page 5

Serial-Output Temperature Sensors TIMING CHARACTERISTICS (V = +4.75V to 5.25V (MAX1298 (MAX1299 2.5MHz SCLK A MIN PARAMETER SYMBOL SCLK Frequency SCLK Pulse Width Low SCLK Pulse Width High CS Low to SCLK ...

Page 6

Serial-Output Temperature Sensors with 5-Channel ADC (T = +25°C, unless otherwise noted.) A MAX1298 INTEGRAL NONLINEARITY vs. OUTPUT CODE 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -2500 -1250 0 1250 2500 OUTPUT CODE MAX1299 DIFFERENTIAL ...

Page 7

Serial-Output Temperature Sensors (T = +25°C, unless otherwise noted.) A MAX1299 SUPPLY CURRENT vs. TEMPERATURE (VOLTAGE MEASUREMENT MODE) 500 450 400 INTERNAL REFERENCE 350 EXTERNAL REFERENCE 300 250 200 150 100 50 0 -40 - ...

Page 8

Serial-Output Temperature Sensors with 5-Channel ADC (T = +25°C, unless otherwise noted.) A MAX1298 INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE 2.52 2.51 2.50 2.49 2.48 -40 - TEMPERATURE (°C) MAX1298 OFFSET vs. SUPPLY VOLTAGE 1.0 0.5 0 -0.5 ...

Page 9

Serial-Output Temperature Sensors (T = +25°C, unless otherwise noted.) A MAX1298 GAIN ERROR vs. TEMPERATURE 1.0 0.5 0 -0.5 -1.0 -40 - TEMPERATURE (°C) MAX1298 TEMPERATURE ERROR vs. INTERNAL DIODE TEMPERATURE 1.0 0.5 0 -0.5 -1.0 -60 ...

Page 10

Serial-Output Temperature Sensors with 5-Channel ADC PIN NAME Analog Input 1. Negative differential input relative to AIN0 or positive differential input relative to AIN5 1 AIN1 (Table 5). Connect to the cathode of external diode 1 for remote temperature ...

Page 11

Serial-Output Temperature Sensors CS SCLK DIN DIODE BIAS CONTROL AIN0 AIN1 AIN2 AIN3 INPUT MUX AIN4 AIN5 Figure 1. Functional Diagram Detailed Description The MAX1298/MAX1299 are low-power, serial-output, multichannel ADCs with temperature-sensing capability for thermostatic, process-control, ...

Page 12

Serial-Output Temperature Sensors with 5-Channel ADC R IN 40k IN 40k IN- TRACK AND HOLD R R 30k REF Figure 2. Converter Input Structure Converter Operation Figure 2 shows a simplified model of the converter input structure. ...

Page 13

Serial-Output Temperature Sensors SSTRB FCLK 13 f CLKs WARMUP Figure 3a. Voltage Conversion Timing Diagram SSTRB FCLK 13 f CLKs WARMUP INPUT ACQUISITION 4 f CONVERSION CYCLE 1 Figure 3b. Temperature Conversion Timing Diagram input sampling capacitance of the ...

Page 14

Serial-Output Temperature Sensors with 5-Channel ADC CS t CSS t CSO SCLK DIN t DV DOUT Figure 4. Detailed Serial Interface Timing OUTPUT CODE + 011111111111 REF 011111111110 - ...

Page 15

Serial-Output Temperature Sensors Table 1. Output Data Format D11 D11 D10 D9 D8 Table 2. Configuration-Byte Format BIT 7 BIT 6 BIT 5 (MSB) Start 0 BIT NAME First logic 1 after CS goes low. (See Input Data Format.) ...

Page 16

Serial-Output Temperature Sensors with 5-Channel ADC ence reflects the power requirement of an internal refer- ence buffer amplifier that can accommodate external loads. Temperature conversions at 100% duty cycle increase supply currents to 440µA (400µA) through additional amplification, buffer, ...

Page 17

Serial-Output Temperature Sensors Table 5. Input Selection SEL3 SEL2 SEL1 ...

Page 18

Serial-Output Temperature Sensors with 5-Channel ADC SHIELD Figure 8. Remote Diode Shielding for PC Boards Layout, Grounding, and Bypassing For best performance, use PC boards. Do not use wire- wrap boards. Board layout should ensure that digital and analog ...

Page 19

Serial-Output Temperature Sensors 0.1µF AIN0 AIN1 2N3904 AIN2 AIN3 2N3904 (SHIELD) SHO AIN4 AIN5 ______________________________________________________________________________________ with 5-Channel ADC Typical Operating Circuit + MAX1298 SCLK DIN DOUT SSTRB GND GND 19 ...

Page 20

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 20 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products © ...

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