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MAX1299CEAE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
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 an AIN5, or V
DD
/4 relative to ground. An
external reference may be used for more accurate volt-
age 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
MAX1298/MAX1299
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
AIN1 AIN0
AIN5
REF
GND
V
DD
SCLK
DIN
DOUT
TOP VIEW
MAX1298
MAX1299
SSOP
SHO
AIN2
GND
AIN3
AIN4
SSTRB
CS
+
Pin Configuration
19-1726; Rev 1; 3/12
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit appears at end of data sheet.
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
PART TEMP RANGE PIN-PACKAGE
MAX1298CEAE+ -40°C to +85°C 16 SSOP
MAX1299CEAE+ -40°C to +85°C 16 SSOP
MAX1298/MAX1299
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 4.75V to 5.25V (MAX1298), V
DD
= +2.7V to 3.6V (MAX1299), external reference, V
REF
= +2.5V (MAX1298), V
REF
= +1.2V
(MAX1299), f
SCLK
= 2.5MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°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.
V
DD
to GND.……………………………………………-0.3V to +6V
SHO to GND...............................................-0.3V to (V
DD
+ 0.3V)
Analog Inputs to GND
(AIN0, AIN1, AIN2, AIN3, AIN4,
AIN5, REF).............................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND (DIN, SCLK, CS)......-0.3V to (V
DD
+ 0.3V)
Digital Outputs to GND (DOUT, SSTRB) ....-0.3V to (V
DD
+ 0.3V)
Digital Output Sink Current ..…………………………………25mA
Maximum Current into Any Pin……………………………….50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin SSOP (derate 7.1mW/°C above +70°C) .......571.4mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature....……………………………………+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ....……………………+300°C
Soldering Temperature (reflow) ..........……………………+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY (Note 1)
Resolution RES 12 Bits
Relative Accuracy (Note 2) INL ±1 LSB
Differential Nonlinearity DNL ±1 LSB
Offset Error Inputs AIN0−AIN5 ±2 LSB
Offset Temperature Coefficient ±10 µV/°C
Gain Error Inputs AIN0−AIN5, offset nulled ±4 LSB
V
DD
/4 Absolute Error ±2 LSB
Gain Temperature Coefficient ±2 ppm/°C
Channel-to-Channel Offset
Matching
±0.5 LSB
CONVERSION RATE
Voltage measurement 1.1
Conversion Time (Note 3) t
CONV
Temperature measurement 2.2
ms
Track/Hold Acquisition Time t
ACQ
16 µs
Aperture Delay t
APR
30 ns
Internal Clock Frequency f
CLK
57.6 62.3 65.5 kHz
ANALOG INPUTS (AIN0−AIN5)
Input Voltage Range (Note 4) Measurement with respect to IN-, Figure 1 -2V
REF
+2V
REF
V
Common-Mode Range 0V
DD
V
Input Current (Note 5) 0.1 5 µA
Input Capacitance 16 pF
MAX1298/MAX1299
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 4.75V to 5.25V (MAX1298), V
DD
= +2.7V to 3.6V (MAX1299), external reference, V
REF
= +2.5V (MAX1298), V
REF
= +1.2V
(MAX1299), f
SCLK
= 2.5MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Input Voltage Low V
IL
0.8 V
Input Voltage High V
IH
V
D D
- 0.8 V
Input Hysteresis V
HYST
0.2 V
Input Leakage Current I
IN
1 µA
Input Capacitance 16 pF
DIGITAL OUTPUTS V
Output Low Voltage V
OL
I
SINK
= 5mA 0.6 V
Output High Voltage V
OH
I
SOURCE
= 0.5mA V
D D
- 0.6 V
Three-State Output Leakage
Current
I
OUT
±10 µA
Three-State Output
Capacitance
15 pF
POWER REQUIREMENTS
MAX1298 4.75 5.25
Positive Supply Voltage V
DD
MAX1299 2.7 3.6
V
MAX1298 390
Ful l - on, vol tag e m easur em ents,
i nter nal r efer ence
MAX1299 350
MAX1298 310
Ful l - on, vol tag e m easur em ents,
exter nal r efer ence
MAX1299 280
MAX1298 440 500
Full-on, temperature measure-
ments, internal reference
MAX1299 400 500
MAX1298 360
Full-on, temperature measure-
ments, exter nal r efer ence
MAX1299 330
Standby, SCLK = GND 120
Standby-plus, SCLK = GND 190
Positive Supply Current (Note 6) I
DD
Shutdown, SCLK = GND 2 10
µA
Power-Supply Rejection Ratio PSRR (Note 7) 50 65 dB
INTERNAL VOLTAGE REFERENCE CHARACTERISTICS
V
DD
= 5V MAX1298
2.494 2.50 2.506
Reference Voltage V
REF
V
DD
= 3V MAX1299 1.197 1.20 1.203
V
Reference Tempco TC V
REF
±20 ppm/°C
Output Short-Circuit Current 1.25 mA
Capacitive Bypass at REF 0.1 µF
MAX1298 130
REF Output Noise f
N
= 10Hz to 10kHz
MAX1299 65
µV
RMS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX1299CEAE+T

Mfr. #:
Buy MAX1299CEAE+T
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors 12-Bit Serial-Output w/5Ch ADC
Lifecycle:
New from this manufacturer.
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