MAX1368ECM+T;MAX1368ECM+;MAX1366ECM+T;MAX1366ECM+;中文规格书,Datasheet资料

General Description

The MAX1366/MAX1368 low-power, 4.5- and 3.5-digit,panel meters feature an integrated sigma-delta analog-to-digital converter (ADC), LED display drivers, voltage digital-to-analog converter (DAC), and a 4–20mA (or 0to 16mA) current driver.

The MAX1366/MAX1368’s analog input voltage range is programmable to either ±2V or ±200mV. The MAX1368drives a 3.5-digit (±1999 count) display and the MAX1366 drives a 4.5-digit (±19,999 count) display.The ADC output directly drives the LED display as well as the voltage DAC, which, in turn, drives the 4–20mA (or 0 to 16mA) current-loop output.

In normal operation, the 0 to 16mA/4–20mA current-loop output follows the ±2V or ±200mV analog input to drive remote panel-meter displays, data loggers, and other industrial controllers. F or added flexibility, the MAX1366/MAX1368 allow direct access to the ADC result, DAC output, and the V/I converter input.

The sigma-delta ADC does not require external preci-sion integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry commonly required in dual-slope ADC panel-meter circuits. On-chip analog input and reference buffers allow direct interface with high-impedance signal sources. Excellent common-mode rejection and digital filtering provides greater than 100dB rejection of simultaneous 50Hz and 60Hz line noise. Other features include data hold and peak detection and overrange/underrange detection.The MAX1366/MAX1368 require a 2.7V to 5.25V supply,a 4.75V to 5.25V V/I supply, and a 7V to 30V loop sup-ply. They are available in a space-saving (7mm x 7mm), 48-pin TQF P package and operate over the extended (-40°C to +85°C) temperature range.

Applications

Industrial Process Control Automated Test Equipment Data-Acquisition Systems Digital Panel Meters Digital Voltmeters Digital Multimeters

Features

?Microcontroller (μC)-Interface, Digital Panel Meter

20-Bit Sigma-Delta ADC

4.5-Digit Resolution (±19,999 Count, MAX1366)3.5-Digit Resolution (±1999 Count, MAX1368)No Integrating/Autozeroing Capacitors 100M ?Input Impedance

±200mV or ±2.000V Input Range ?LED Display

Common-Cathode 7-Segment LED Driver Programmable LED Current (0 to 20mA)2.5Hz Update Rate ?Output DAC and Current Driver

±15-Bit DAC with 14-Bit Linear V/I Converter Selectable 0 to 16mA or 4–20mA Current Output Unipolar/Bipolar Modes

±50μA Zero Scale, ±40ppmFS/°C (typ)±0.5% Gain Error, ±25ppmFS/°C (typ)

Separate 7V to 30V Supply for Current-Loop Output ?2.7V to 5.25V ADC/DAC Supply ?4.75V to 5.25V V/I Converter Supply

?Internal 2.048V Reference or External Reference ?SPI?-/QSPI?-/MICROWIRE?-Compatible Serial Interface ?48-Pin, 7mm x 7mm TQFP Package

MAX1366/MAX1368

Microcontroller-Interface,

Output

________________________________________________________________Maxim Integrated Products

Selector Guide

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at https://www.360docs.net/doc/e213409904.html,.

Ordering Information

Pin Configuration appears at end of data sheet.Typical Operating Circuits appear at end of data sheet.SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

M A X 1366/M A X 1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4–20mA Output 2_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(AV DD = DV DD = DAC_VDD = +2.7V to +5.25V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+- V REF-= 2.048V (external reference), V EXT = 7V, V REG_AMP = +5.0V, C REF+= 0.1μF , REF - = GND, C NEGV = 0.1μF. Internal clock mode, unless otherwise noted. All specifications are at T A = T MIN to T MAX . Typical values are at T A = +25°C, unless otherwise noted.)

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.

(With reference to GND, unless otherwise specified.)

AV DD ,DV DD....................................................................-0.3V to +6.0V AIN+, AIN-, REF+, REF-.........................V NEGV to (AV DD + 0.3V)REG_FORCE, CMP, DAC_VDD, DACVOUT,

CONV_IN, 4-20OUT.............................-0.3V to (AV DD + 0.3V)EN_BPM, EN_I, REFSELE, DACDATA_SEL, CLK, EOC ,CS_DAC , SCLK, DIN

DOUT.....................................................-0.3V to (DV DD + 0.3V)NEGV.......................................................-2.6V to (AV DD + 0.3V)LED_EN....................................................-0.3V to (DV DD + 0.3V)SET...........................................................-0.3V to (AV DD + 0.3V)REG_AMP, REG_VDD...........................................-0.3V to +6.0V LEDG.....................................................................-0.3V to +0.3V GND_DAC.............................................................-0.3V to +0.3V GND_V/I.................................................................-0.3V to +0.3V

SEG_ to LEDG.........................................-0.3V to (V LEDV + 0.3V)DIG_ to LEDG..........................................-0.3V to (V LEDV + 0.3V)LOWBATT ................................................-0.3V to (AV DD + 0.3V) REF_DAC.................................................-0.3V to (AV DD + 0.3V)DACVOUT................................................-0.3V to (AV DD + 0.3V)DIG_ Sink Current.............................................................300mA DIG_ Source Current...........................................................50mA SEG_ Sink Current..............................................................50mA SEG_ Source Current..........................................................50mA Maximum Current Input into Any Other Pin........................50mA Continuous Power Dissipation (T A = +70°C)

48-Pin TQFP (derate 22.7mW/°C above +70°C).....1818.2mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-60°C to +150°C Lead Temperature (soldering, 10s).................................+300°C

MAX1366/MAX1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel

Meters with 4–20mA Output

ELECTRICAL CHARACTERISTICS (continued)

(AV DD = DV DD = DAC_VDD = +2.7V to +5.25V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+- V REF-= 2.048V (external

M A X 1366/M A X 1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4–20mA Output 4_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AV DD = DV DD = DAC_VDD = +2.7V to +5.25V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+- V REF-= 2.048V (external

MAX1366/MAX1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel

Meters with 4–20mA Output

_______________________________________________________________________________________5

ELECTRICAL CHARACTERISTICS (continued)

(AV DD = DV DD = DAC_VDD = +2.7V to +5.25V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+- V REF-= 2.048V (external

M A X 1366/M A X 1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4–20mA Output 6_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AV DD = DV DD = DAC_VDD = +2.7V to +5.25V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+- V REF-= 2.048V (external

Note 2:Offset calibrated. See OFFSET_CAL1 AND OFFSET_CAL2 in the On-Chips Registers section.Note 3:Offset nulled.

Note 4:Offset-drift error is eliminated by recalibration at the new temperature.

Note 5:The input voltage range for the analog inputs is given with respect to the voltage on the negative input of the differential pair.Note 6:V AIN+or V AIN-= -2.2V to +2.2V. V REF+or V REF-= -2.2V to +2.2V. All input structures are identical. Production tested on

AIN+ and REF+ only. V REF+ must always be greater than V REF-.

Note 7:Measured at DC by changing the power-supply voltage from 2.7V to 5.25V and measuring the effect on the conversion

error with external reference. PSRR at 50Hz and 60Hz exceeds 120dB with filter notches at 50Hz and 60Hz (Figure 1).

Note 8:CLK and SCLK are disabled.Note 9:LED drivers are disabled.

Note 10:Power-supply currents are measured with all digital inputs at either GND or DV DD and with the device in internal clock mode.Note 11:All input signals are specified with t RISE = t FALL = 5ns (10% to 90% of DV DD ) and are timed from a voltage level of 50% of

DV DD , unless otherwise noted.

Note 12:See the serial-interface timing diagrams (Figures 7–11).

0300200100400

5006007008009001000

2.7

3.73.2

4.2

4.7

5.2

SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (μA )

0200100

400300600500

700-40

-15

85SUPPLY CURRENT vs. TEMPERATURE

TEMPERATURE (°C)S U P P L Y C U R R E N T (μA )

MAX1366

OFFSET ERROR vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

O F F S E T E R R O R (L S B )

4.754.253.753.25-0.11-0.06-0.010.040.090.140.19-0.16

2.75 5.25

Typical Operating Characteristics

(A VDD = D VDD = +5V, V DAC_VDD = +5.0V, GND = 0, LEDG = 0, V LEDV = +2.7V to +5.25V, V REF+ - V REF-= 2.048V (external reference),V EXT = 7V, C REF+ = 0.1μF, REF- = GND, C NEGV = 0.1μF, RANGE bit = 1, internal clock mode. T A = +25°C, unless otherwise noted.)

MAX1366/MAX1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel

Meters with 4–20mA Output

_______________________________________________________________________________________7

Typical Operating Characteristics

MAX1366

OFFSET ERROR vs. TEMPERATURE

M X 1366/68 t o c 04

TEMPERATURE (°C)O F F S E T E R R O R (L S B )

-0.100.10.20.30.40.50.6-0.2

70MAX1366

GAIN ERROR vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)G A I N E R R O R (% F U L L S C A L E )

4.754.253.25 3.75-0.08-0.04-0.06-0.0200.020.040.060.08-0.10

2.75 5.25MAX1366

GAIN ERROR vs. TEMPERATURE

M A X 1366/68 t o c 06

TEMPERATURE (°C)

G A I N E R R O R (% F U L L S C A L E )605030402010-0.09-0.08-0.07-0.06-0.05-0.04-0.03-0.02-0.010

-0.10

070

MAX1366

(±200mV INPUT RANGE) INL vs. OUTPUT CODE

M A X 1366/68 t o c 07

OUTPUT CODE

I N L (C O U N T S )

10,0000-10,000-0.500.51.0-1.0

-20,000

20,000

MAX1366

(±2V INPUT RANGE) INL vs. OUTPUT CODE

M A X 1366/68 t o c 08

OUTPUT CODE

I N L (C O U N T S )

10,000

0-10,000

-0.5

0.51.0-1.0

-20,000

20,000

NOISE DISTRIBUTION

NOISE (LSB)

P E R C E N T A G E O F U N I T S (%)

0.8

0.70.60.50.40.30.20.10-0.15

-0.2INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

M A X 1366/68 t o c 10

TEMPERATURE (°C)

R E F E R E N C E V O L T A G E (V )60

2.0462.0452.0472.0492.0482.0512.0502.0532.0522.0542.044

INTERNAL REFERENCE VOLTAGE vs. ANALOG SUPPLY VOLTAGE

M A X 1366/68 t o c 11

SUPPLY VOLTAGE (V)

R E F E R E N C E V O L T A G E (V ) 4.75

4.25

3.75

3.25

2.0452.0462.0472.0482.0492.0502.044

2.75

5.25

DATA OUTPUT RATE vs. TEMPERATURE

M A X 1366/68 t o c 12

TEMPERATURE (°C)

D A T A O U T P U T R A T

E (H z )

-15

4.92

4.984.964.94

5.005.025.045.065.085.10

4.90

-40

DATA OUTPUT RATE vs. SUPPLY VOLTAGE

M A X 1366/68 t o c 13

SUPPLY VOLTAGE (V)D A T A O U T P U T R A T E (H z ) 4.74

4.23

3.21

3.72

4.9954.9904.985

5.0005.0055.0105.0155.0204.980

2.70

5.25OFFSET ERROR

vs. COMMON-MODE VOLTAGE

M A X 1366/68 t o c 14

COMMON-MODE VOLTAGE (V)

O F F S E T E R R O R (L S B )

1.51.0-1.5-1.0-0.500.5-0.15-0.10-0.0500.050.100.150.20

-0.20

-2.0 2.0

V NEG STARTUP SCOPE SHOT

20ms/div

2V/div

1V/div

V DD

V NEG

CHARGE-PUMP OUTPUT VOLTAGE vs. ANALOG SUPPLY VOLTAGE

M A X 1366/68 t o c 16

SUPPLY VOLTAGE (V)

V N E G V O L T A G E (V )

4.75

4.25

3.75

3.25

-2.48

-2.46

-2.44

-2.42-2.40-2.50

2.75

5.25

SEGMENT CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)S E G M E N T C U R R E N T (μA )

4.744.233.723.21510152025300

2.70 5.25-0.2

0-0.10.20.10.30.4-4010-15356085

DAC ZERO-CODE OFFSET ERROR

vs. TEMPERATURE

M A X 1366/68 t o c 18

TEMPERATURE (°C)

O F F S E T E R R O R (L S B )

M A X 1366/M A X 1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4–20mA Output 8_______________________________________________________________________________________

Typical Operating Characteristics

MAX1366/MAX1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel

Meters with 4–20mA Output

_______________________________________________________________________________________9

Typical Operating Characteristics (continued)

-0.30

-0.20-0.25-0.10-0.15-0.050

-40

-15

DAC GAIN ERROR vs. TEMPERATURE

M A X 1366/68 t o c 19

TEMPERATURE (°C)

G A I N E R R O R (L S B )4-20OUT = 21.7mA

CONV_IN = 1V

10mA/div

500mV/div

STEP RESPONSE

MAX1366/68 toc20

100μs/div

-50

-20-30-40

0-104030201050

-40

-20

4-20OUT ZERO-SCALE ERROR

vs. TEMPERATURE

TEMPERATURE (°C)

C U R R E N T O U T P U T (μA )

-50

-20-30-400-104030201050-40-200204060804-20OUT GAIN ERROR vs. TEMPERATURE

TEMPERATURE (°C)G A I N E R R O R (%)

-150

-100-50050100150486101214161820

POWER-SUPPLY REJECTION vs. CURRENT OUTPUT (4-20OUT)

4-20OUT OUTPUT CURRENT (mA)

P O W E R -S U P P L Y R E J E C T I O N (n A /V

)-0.5

00.51.01.52.02.5-20,000

-10,000010,00020,000

4-20OUT vs. DAC CODE (4-20OUT SPAN LINEARITY)

DAC CODE (COUNTS)

S P A N L I N E A R I T Y (μA )

M A X 1366/M A X 1368

Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4–20mA Output 10______________________________________________________________________________________

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