MAX1367ECM Maxim Integrated, MAX1367ECM Datasheet

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MAX1367ECM

Manufacturer Part Number
MAX1367ECM
Description
LED Display Drivers
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX1367ECM

Operating Supply Voltage
2.7 V to 5.25 V

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1367ECM+
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
MAX1367ECM+T
Manufacturer:
Maxim Integrated
Quantity:
10 000
The MAX1365/MAX1367 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 0 to 16mA) current driver.
The MAX1365/MAX1367’s analog input voltage range is
programmable to either ±2V or ±200mV. The MAX1367
drives a 3.5-digit (±1999 count) display and the
MAX1365 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. For added flexibility, the
MAX1365/MAX1367 allow direct access to the 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 provide
greater than 100dB rejection of simultaneous 50Hz and
60Hz line noise. Other features include data hold, peak
detection, and overrange/underrange detection.
The MAX1365/MAX1367 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 TQFP package and operate over the
extended (-40°C to +85°C) temperature range.
19-3889; Rev 1; 1/06
Pin Configuration appears at end of datasheet.
Typical Operating Circuits appear at end of datasheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Automated Test Equipment
Data-Acquisition Systems
Digital Multimeters
Digital Panel Meters
Digital Voltmeters
Industrial Process Control
________________________________________________________________ Maxim Integrated Products
Stand-Alone, 4.5-/3.5-Digit Panel Meters
General Description
Applications
♦ Stand-Alone, Digital Panel Meter
♦ LED Display
♦ Output DAC and Current Driver
♦ 2.7V to 5.25V ADC/DAC Supply
♦ 4.75V to 5.25V V/I Converter Supply
♦ Internal 2.048V Reference or External Reference
♦ 48-Pin, 7mm x 7mm TQFP Package
MAX1365ECM
MAX1367ECM
MAX1365ECM
MAX1367ECM
20-Bit Sigma-Delta ADC
No Integrating/Autozeroing Capacitors
100MΩ Input Impedance
±200mV or ±2.000V Input Range
Common-Cathode 7-Segment LED Driver
Programmable LED Current (0 to 20mA)
2.5Hz Update Rate
±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
4.5-Digit Resolution (±19,999 Count, MAX1365)
3.5-Digit Resolution (±1999 Count, MAX1367)
PART
PART
with 4–20mA Output
-40°C to +85°C
-40°C to +85°C
Ordering Information
TEMP RANGE
RESOLUTION
(DIGITS)
4.5
3.5
Selector Guide
Features
PIN-PACKAGE
48 TQFP
48 TQFP
CODE
C48-6
C48-6
PKG
1

Related parts for MAX1367ECM

MAX1367ECM Summary of contents

Page 1

... ADC/DAC Supply ♦ 4.75V to 5.25V V/I Converter Supply ♦ Internal 2.048V Reference or External Reference ♦ 48-Pin, 7mm x 7mm TQFP Package Applications PART MAX1365ECM MAX1367ECM PART MAX1365ECM MAX1367ECM Features Ordering Information TEMP RANGE PIN-PACKAGE -40°C to +85°C 48 TQFP -40°C to +85°C 48 TQFP Selector Guide ...

Page 2

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output ABSOLUTE MAXIMUM RATINGS AV DV DD, DD .................................................................... AIN+, AIN-, REF+, REF-.........................V REG_FORCE, CMP, DAC_VDD, DACVOUT, CONV_IN, 4-20OUT .............................-0.3V to (AV EN_BPM, EN_I, REFSELE, DACDATA_SEL, INTREF, RANGE, DPSET1, DPSET2, HOLD, PEAK, DPON, CS_DAC...............................................-0.3V ...

Page 3

Stand-Alone, 4.5-/3.5-Digit Panel Meters ELECTRICAL CHARACTERISTICS (continued) ( DAC_VDD = +2.7V to +5.25V, GND = reference), 4-20OUT = 7V, V REG_AMP noted. All specifications are MIN PARAMETER SYMBOL ...

Page 4

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output ELECTRICAL CHARACTERISTICS (continued) ( DAC_VDD = +2.7V to +5.25V, GND = reference), 4-20OUT = 7V +5.0V, C REG_AMP noted. All specifications are at T ...

Page 5

Stand-Alone, 4.5-/3.5-Digit Panel Meters ELECTRICAL CHARACTERISTICS (continued) ( DAC_VDD = +2.7V to +5.25V, GND = reference), 4-20OUT = 7V, V REG_AMP noted. All specifications are MIN PARAMETER SYMBOL ...

Page 6

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output ( +5V +5.0V, GND = 0, LEDG = 0, V VDD VDD DAC_VDD ence 7V 0.1µF, C EXT REF+ REF- wise noted.) ...

Page 7

Stand-Alone, 4.5-/3.5-Digit Panel Meters ( +5V +5.0V, GND = 0, LEDG = 0, V VDD VDD DAC_VDD ence 7V 0.1µF, C EXT REF+ REF- wise noted.) INTERNAL REFERENCE VOLTAGE ...

Page 8

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output ( +5V +5.0V, GND = 0, LEDG = 0, V VDD VDD DAC_VDD ence 7V 0.1µF, C EXT REF+ REF- wise noted.) ...

Page 9

Stand-Alone, 4.5-/3.5-Digit Panel Meters PIN NAME Positive Analog Input. Positive side of fully differential analog input. Bypass AIN+ to GND with a 1 AIN+ 0.1µF or greater capacitor. Negative Analog Input. Negative side of fully differential analog input. Bypass AIN- ...

Page 10

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output PIN NAME Hold Logic Input. Connect HOLD to DV HOLD to GND to update the LED at a rate of 2.5Hz and disable the hold function. Placing the 26 HOLD device into hold ...

Page 11

Stand-Alone, 4.5-/3.5-Digit Panel Meters AV DV INTREF DD DD +2.5V AIN+ AIN- INPUT BUFFER REF+ REF- -2.5V CHARGE NEGV -2.5V PUMP MAX1365 MAX1367 Detailed Description The MAX1365/MAX1367 low-power, highly integrated ADCs with LED drivers convert a ±2V differential input voltage ...

Page 12

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output signal into a digital pulse train whose average duty cycle represents the digitized signal information. The modulator quantizes the input signal at a much higher sample rate than the bandwidth of the input. ...

Page 13

Stand-Alone, 4.5-/3.5-Digit Panel Meters DIGIT 4 DIGIT 3 DIGIT 2 Figure 2. Segment Connection for the MAX1365 ...

Page 14

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output SEGDP SEGG SEGF SEGE SEGD SEGC SEGB SEGA Figure 4. 2-Digit Common-Cathode Configuration DIGIT 4 (MSD) DIGIT 3 DIGIT 2 DIGIT 1 DIGIT 0 (LSD) DATA Figure 5. LED Voltage Waveform The MAX1365/MAX1367 ...

Page 15

Stand-Alone, 4.5-/3.5-Digit Panel Meters Table 5. Current Output Table ANALOG INPUT UNIPOLAR MODE (EN_I = LOW) Negative Full Scale Positive Full Scale 16 ACTIVE GAUGE DUMMY GAUGE Figure 6. Strain-Gauge Application with the MAX1365/MAX1367 Set EN_BPM high ...

Page 16

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output During these 6s, the MAX1365 displays 1.2V to 1.5V when a stable reference is detected valid refer- ence is not found, the MAX1365 times out after 6s and begins enhanced offset ...

Page 17

Stand-Alone, 4.5-/3.5-Digit Panel Meters LED 19,999 -19,999 - -100µV 100µV 0 -2V ANALOG INPUT VOLTAGE Figure 7. MAX1365 Transfer Function—±2V Range ...

Page 18

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output UNIPOLAR : BIPLOLAR : ADC OUTPUT CODE FS = FULL SCALE Figure 11. DAC Output Voltage vs. ADC Output Code CURRENT OFFSET ENABLED (EN_I = 1) 20 ...

Page 19

Stand-Alone, 4.5-/3.5-Digit Panel Meters The transfer function for the MAX1367 with AIN+ - AIN- ≥ 0 and RANGE = DV is: DD  + − AIN AIN = ( ) 7 COUNT 1 024 .   + ...

Page 20

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output However, if the LEDs used have a higher forward voltage drop than 2.2V, the supply voltage must be raised accordingly to ensure that the driver always has at least 0.8V headroom. For a ...

Page 21

Stand-Alone, 4.5-/3.5-Digit Panel Meters Power-Supply Rejection (PSR)—ADC PSR is a measure of the data converter’s level of immu- nity to power-supply fluctuations. PSR assumes that the converter’s linearity is unaffected by changes in the power-supply voltage. Power-supply rejection ratio (PSRR) ...

Page 22

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output V EXT 30V 0.1µF DEPLETION- MODE FET 4.75V TO 5.25V 4-20mA/0 TO 16mA CURRENT-LOOP OUTPUT 4-20mA PLC INPUT R L ADC 0.1µF 10µF 10µF L ISO 0.1µF 2.7V TO 10µF ...

Page 23

Stand-Alone, 4.5-/3.5-Digit Panel Meters SEGA–SEGDP AIN+ V SEGMENT EXT 30V CONNECTIONS AIN- 0.1µF CMP DEPLETION- MODE REG_FORCE FET REG_VDD REG_AMP 4.75V TO 5.25V 4-20OUT 4-20mA/0 TO 16mA CURRENT-LOOP OUTPUT 4-20mA PLC INPUT R ADC L LEDV ...

Page 24

Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output TOP VIEW LEDV SEGC SEGD SEGE SEGF SEGG SEGDP LED_EN NEGV DPON REF- REF+ 24 ______________________________________________________________________________________ ...

Page 25

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 25 © 2006 Maxim Integrated Products with 4– ...

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