MAX1368ECM+ Maxim Integrated Products, MAX1368ECM+ Datasheet - Page 33

• Manufacturer Part Number: MAX1368ECM+
• Description: IC PANEL METER 3.5 DIG 48LQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1368ECM+

• Display Type: LED
• Configuration: 7 Segment
• Interface: Serial
• Digits Or Characters: A/D 3.5 Digits
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

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) is the ratio of the input signal change to the
change in the converter output. PSRR is typically mea-
sured in dB.
Microcontroller-Interface, 4.5-/3.5-Digit Panel
Power-Supply Rejection (PSR)—ADC
______________________________________________________________________________________
2.7V TO
5.25V
0.1µF
R
L
DEPLETION-
4–20mA/0 TO 16mA
CURRENT-LOOP OUTPUT
10µF
MODE
7V TO 30V
FET
PLC INPUT
L
4–20mA
ISO
V
EXT
10µF
4.75V TO
ADC
5.25V
0.1µF
0.1µF
V
0.1µF
IN
AIN+
AIN-
CMP
REG_FORCE
REG_VDD
REG_AMP
4-20OUT
LEDV
LED_EN
DV
DAC_VDD
AV
LOWBATT
Meters with 4–20mA Output
DD
DD
CONNECTIONS
25kΩ
SEGA–SEGDP
SEGMENT
SET
0.1µF
NEGV
MAX1366 Typical Operating Circuit
0.1µF
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. Note that the V/I converter cur-
rent output (4–20mA) power-supply rejection is with
respect to the 7V to 30V loop supply.
GND REF- REF+
GNDS
SUPPLY VOLTAGE
MAX1366
Power-Supply Rejection—V/I Converter
MAX6126
DAC_VDD
CONNECTIONS
IN
DIG0–DIG4
DIGIT
GND
OUTS
OUTF
10µF
LEDG
GND_DAC
0.1µF
GND_V/I
DACDATA_SEL
DACVOUT
REF_DAC
CONV_IN
EN_BPM
REFSELE
CS_DAC
SCLK
DOUT
EN_I
CLK
EOC
DIN
CS
DV
DD
µC
33