Rainbow Electronics MAX1099 User Manual

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 calibration 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 separate track-and-hold (T/N) for positive and negative inputs. Both devices accept versatile input modes consisting of two 3-channel signal pairs, five 1-channel signals 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

Features

♦ Local and Remote Temperature Sensing

♦ 12-Bit Resolution for Temperature and

10-Bit Resolution for Voltage Inputs

♦ ±1°C Accuracy from -40°C to +85°C

♦ Fully Differential Inputs

♦ Single-Supply Operation

+4.75V to +5.25V (MAX1098) +2.7V to +3.6V (MAX1099)

♦ 3-Wire SPI/QSPI/MICROWIRE-Compatible

Interface

♦ Internal Precision Voltage Reference

2.50V (MAX1098)

1.20V (MAX1099)

♦ Space-Saving 16-Pin SSOP Package

MAX1098/MAX1099

10-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

19-1728; Rev 0; 7/00

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.

Ordering Information

*Future product—contact factory for availability.

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.

Temperature Error

TOP VIEW

AIN1 AIN0

SHO

AIN2

AIN3

AIN4

GND

SSTRB

AIN5

REF

MAX1098 MAX1099

GND

SCLK

DIN

COUT

PART

MAX1098AEAE* -40°C to +85°C 16 SSOP ±0.75

MAX1098BEAE* -40°C to +85°C 16 SSOP ±1.0

MAX1098CEAE -40°C to +85°C 16 SSOP ±4.0

MAX1099AEAE* -40°C to +85°C 16 SSOP ±0.75

MAX1099BEAE* -40°C to +85°C 16 SSOP ±1.0

MAX1099CEAE -40°C to +85°C 16 SSOP ±4.0

1.0

0.5

TEMP.

RANGE

TEMPERATURE ERROR

vs. INTERNAL DIODE TEMPERATURE

PIN PACKAGE

MAX1098

TEMP. SENSE

ACCURACY

MAX1098/9-29

(°C)

TEMPERATURE ERROR (°C)

SSOP

-0.5

-1.0

-60 -20 20 60-40 0 40 80 100 TEMPERATURE (°C)

MAX1098/MAX1099

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +4.75V to +5.25V (MAX1098), VDD= +2.7V to +3.6V (MAX1099), external reference, V

REF

= +2.5V (MAX1098), V

REF

= +1.2V

(MAX1099), f

SCLK

= 2.5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +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.

VDDto GND.……………………………………………-0.3V to +6V

SHO to GND................................................-0.3V to (V

+0.3V)

Analog Inputs to GND

(AIN0–AIN5, REF)...................................-0.3V to (V

+0.3V)

Digital Inputs to GND (DIN, SCLK, CS).......-0.3V to (V

+0.3V)

Digital Outputs to GND (DOUT, SSTRB) .....-0.3V to (V

+0.3V) Digital Output Sink Current ..…………………………………25mA Maximum Current into Any Pin……………………………….50mA

Continuous Power Dissipation (T

= +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

DC ACCURACY (Note 1)

Resolution RES 10 Bits

Relative Accuracy (Note 2) INL ±1 LSB

Differential Nonlinearity DNL ±1 LSB

Offset Error Inputs AIN0−AIN5 ±1 LSB

Offset Temperature Coefficient ±10 µV/°C

Gain Error Inputs AIN0−AIN5, offset nulled ±1 LSB

VDD/4 Absolute Error ±1 LSB

Gain Temperature Coefficient ±2 ppm/°C

Channel-to-Channel Offset Matching

CONVERSION RATE

Conversion Time (Note 3) t

Track/Hold Acquisition Time t

Aperture Delay t

Internal Clock Frequency f

ANALOG INPUTS (AIN0−AIN5)

Input Voltage Range (Note 4) Measurement with respect to IN-, Figure 1 -2V

Common-Mode Range 0V

Input Current (Note 5) 0.1 5 µA

Input Capacitance 16 pF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CONV

ACQ

APR

CLK

Voltage measurement 1.1

Temperature measurement 2.2

±0.25 LSB

16 µs

30 ns

57.6 62.3 65.5 kHz

REF

+2V

REF

MAX1098/MAX1099

10-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

________________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +4.75V to +5.25V (MAX1098), VDD= +2.7V to +3.6V (MAX1099), external reference, V

REF

= +2.5V (MAX1098), V

REF

= +1.2V

(MAX1099), f

SCLK

= 2.5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIGITAL INPUTS

Input Voltage Low V

Input Voltage High V

Input Hysteresis V

Input Leakage Current I

Input Capacitance 16 pF

DIGITAL OUTPUTS V

Output Low Voltage V Output High Voltage V

Three-State Output Leakage Current

Three-State Output Capacitance

POWER REQUIREMENTS

Positive Supply Voltage V

Positive Supply Current (Note 6)

Power-Supply Rejection

INTERNAL VOLTAGE REFERENCE CHARACTERISTICS

Reference Voltage V

Reference Tempco TC V

Output Short-Circuit Current 1.25 mA

Capacitive Bypass at REF 0.1 µF

REF Output Noise fN = 10Hz to 10kHz

REF Line Regulation

REF Load Regulation

HYST

OUT

PSRR (Note 7) 50 65 dB

REF

= 5mA 0.6 V

SINK

MAX1098 4.75 5.25

MAX1099 2.7 3.6

Full-on, voltage measurements, internal reference

Full-on, voltage measurements, external reference

Ful l - on, tem p er atur e m easur em ents, i nter nal r efer ence

Ful l - on, tem p er atur e m easur em ents, exter nal r efer ence

Standby, SCLK = GND 120

Standby-plus, SCLK = GND 190 Shutdown, SCLK = GND 2 10

VDD = 5V MAX1098

VDD = 3V MAX1099 1.197 1.20 1.203

0 to 100µA output current (Note 8)

= 0.5mA V

SOURCE

MAX1098 390

MAX1099 350

MAX1098 310

MAX1099 280

MAX1098 440 500

MAX1099 400 500

MAX1098 360

MAX1099 330

MAX1098 130

MAX1099 65

MAX1098 +3.0

MAX1099 +0.2

MAX1098 4 10

MAX1099 2 10

- 0.8 V

D D

0.2 V

- 0.6 V

D D

15 pF

2.494 2.50 2.506

±20 ppm/°C

0.8 V

1 µA

±10 µA

µA

µV

RMS

mV/V

µV/µA

MAX1098/MAX1099

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

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 4.75V to 5.25V (MAX1098), VDD= 2.7V to 3.6V (MAX1099), external reference, V

REF

= +2.5V (MAX1098), V

REF

= +1.2V

(MAX1099), f

SCLK

= 2.5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

EXTERNAL VOLTAGE REFERENCE CHARACTERISTICS

Reference Voltage Range V

REF Input Resistance

REF Input Capacitance 24 pF

INTERNAL TEMPERATURE MEASUREMENT CHARACTERISTICS

Resolution 0.13 °C

Output Error (Notes 1, 9)

Power-Supply Rejection Ratio PSRR (Note 7) 0.2 °C/V

Noise 0.18 °C

EXTERNAL TEMPERATURE MEASUREMENT CHARACTERISTICS

Output Error 2N3904 (Note 10) ±2 ±4 °C

Remote Diode Excitation (1X) 10 µA

Remote Diode Excitation (10X) 100 µA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

REF

MAX1098 0.8 2.5

MAX1099 0.8 1.2

Converting 10

Shutdown 25

MAX109_A ±0.75

TA = +85°C, PD = 1mW

= -40°C to 0°C,

= +70°C to +85°C

MAX109_B ±1

MAX109_C ±1

MAX109_A

MAX109_B ±1TA = 0°C to +70°C

MAX109_C ±2

MAX109_A ±0.75

MAX109_B ±1

MAX109_C ±4

±0.75

MΩ

°C

RMS

MAX1098/MAX1099

10-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

________________________________________________________________________________________ 5

TIMING CHARACTERISTICS

(VDD= +4.75V to +5.25V (MAX1098), VDD= +2.7V to +3.6V (MAX1099), external reference, V

REF

= +2.5V (MAX1098), V

REF

= +1.2V

(MAX1099), f

SCLK

= 2.5MHz, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Figures 4, 6)

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 250MΩ; 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 V

FS(+4.75V)

- V

FS(+5.25V)

for the MAX1098 and at V

FS(+2.7V)

- V

FS(+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.

SCLK Frequency f

SCLK Pulse Width Low t

SCLK Pulse Width High t CS Low to SCLK High t SCLK High to CS Setup t CS Pulse Width t SCLK High to CS Low Setup t SCLK High to CS High Setup t

DIN Setup to SCLK High Time t

DIN Hold Time t

SCLK Fall to Output Data Valid t

CS Fall to Output Enable t CS Rise to Output Disable t

SSTRB Rise to SCLK Rise t

SCLK Fall to SSTRB Fall t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SCLK

CSS

CSH

CS0

CS1

SCLK

SSTRB

RL = 100kΩ, CL = 50pF 150 ns

RL = 100kΩ, CL = 50pF 50 ns

200 ns

100 ns

50 ns

100 ns

0ns

200 ns

2.5 MHz

MAX1098/MAX1099

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

6 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

-0.05

-0.10

-0.15

-0.20

0.05

0.10

0.15

0.20

-625 0 625

MAX1098

INTEGRAL NONLINEARITY

vs. OUTPUT CODE

MAX1098/9-01

OUTPUT CODE

INTEGRAL NONLINEARITY (LSB)

-625 0 625

MAX1099

INTEGRAL NONLINEARITY

vs. OUTPUT CODE

MAX1098/9-02

OUTPUT CODE

INTEGRAL NONLINEARITY (LSB)

-0.05

-0.10

-0.15

-0.20

0.05

0.10

0.15

0.20

-625 0 625

MAX1098

DIFFERENTIAL NONLINEARITY

vs. OUTPUT CODE

MAX1098/9-03

OUTPUT CODE

DIFFERENTIAL NONLINEARITY (LSB)

-0.05

-0.10

-0.15

-0.20

0.05

0.10

0.15

0.20

-625 0 625

MAX1099

DIFFERENTIAL NONLINEARITY

vs. OUTPUT CODE

MAX1098/9-04

OUTPUT CODE

DIFFERENTIAL NONLINEARITY (LSB)

-0.05

-0.10

-0.15

-0.20

0.05

0.10

0.15

0.20

150

100

200

250

300

350

400

450

500

4.7 4.94.8 5.0 5.1 5.2

MAX1098

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(VOLTAGE MEASUREMENT MODE)

MAX1098/9-05

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

EXTERNAL REFERENCE

INTERNAL REFERENCE

150

100

200

250

300

350

400

450

500

2.7 3.12.9 3.3 3.5

MAX1099

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(VOLTAGE MEASUREMENT MODE)

MAX1098/9-06

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

EXTERNAL REFERENCE

INTERNAL REFERENCE

150

100

200

250

300

350

400

450

500

4.7 4.94.8 5.0 5.1 5.2

MAX1098

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(TEMPERATURE MEASUREMENT MODE)

MAX1098/9-07

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

EXTERNAL REFERENCE

INTERNAL REFERENCE

150

100

200

250

300

350

400

450

500

2.7 3.12.9 3.3 3.5

MAX1099

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(TEMPERATURE MEASUREMENT MODE)

MAX1098/9-08

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

EXTERNAL REFERENCE

INTERNAL REFERENCE

150

100

250

200

450

400

350

300

500

-40 -20 0 20 40 60

MAX1098

SUPPLY CURRENT vs. TEMPERATURE

(VOLTAGE MEASUREMENT MODE)

MAX1098/9-09

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

EXTERNAL REFERENCE

INTERNAL REFERENCE

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