A Low Dropout Precision Voltage References

Max Supply

Description

Niveau: Supérieur, Doctorat, Bac+8
M A X 8 7 2 /M A X 8 7 4 10µA, Low-Dropout, Precision Voltage References ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: or phone [phone]. For small orders, phone [phone]. General Description The MAX872/MAX874 precision 2.5V and 4.096V micro- power voltage references consume a maximum of only 10µA and operate from supply voltages up to 20V. The combination of ultra-low quiescent current and low 200mV dropout makes them ideal for battery-powered equipment. They source and sink up to 500µA with only 200mV input voltage headroom, which makes the 2.5V MAX872 ideal for use with a 3V supply and the 4.096V MAX874 ideal for use with a 5V supply. Initial accuracy of 0.2% at +25°C (±5mV for the MAX872, ±8mV for the MAX874) and low 40ppm/°C max drift make these references suitable for a wide range of precision applications.

• electrical characteristics—max872c


• stresses beyond


• iscshort-circuit output


• output voltage


• range


• max872


• µa15iqquiescent supply

Sujets

• Supply
• Régulation

Informations

• Publié par: profil-zyak-2012
• Nombre de lectures: 11
• Langue: English

Extrait

19-0005; Rev 2; 6/97

10µA, Low-Dropout,
Precision Voltage References
General DescriptionFeatures
The MAX872/MAX874 precision 2.5V and 4.096V micro-
©
Output Voltage
power voltage references consume a maximum of only
2.500V ±0.2% (MAX872)
10µA and operate from supply voltages up to 20V. The
4.096V ±0.2% (MAX874)
combination of ultra-low quiescent current and low
©
Wide Operating Voltage Range
200mV dropout makes them ideal for battery-powered
equipment. They source and sink up to 500µA with only
2.7V to 20V (MAX872)
200mV input voltage headroom, which makes the 2.5V
4.3V to 20V (MAX874)
MAX872 ideal for use with a 3V supply and the 4.096V
©
10µA Max Supply Current
MAX874 ideal for use with a 5V supply.
©
40ppm/°C Max Drift Over Extended Temp. Range
Initial accuracy of 0.2% at +25°C (±5mV for the MAX872,
©
Line Regulation Over Temp.
±8mV for the MAX874) and low 40ppm/°C max drift make
these references suitable for a wide range of precision
20µV/V (MAX872)
applications.
75µV/V (MAX874)
©
Load Regulation Over Temp.
0.6mV/mA Max (MAX872)
1.0mV/mA Max (MAX874)
©
±500µA Sink/Source Current
Ordering Information
PARTTEMP. RANGEPIN-PACKAGE
MAX872
CPA0°C to +70°C8 Plastic DIP
MAX872CSA0°C to +70°C8 SO
MAX872C/D0°C to +70°CDice*
MAX872EPA-40°C to +85°C8 Plastic DIP
MAX872ESA-40°C to +85°C8 SO
MAX874
CPA0°C to +70°C8 Plastic DIP
MAX874CSA0°C to +70°C8 SO
MAX874C/D0°C to +70°CDice*
MAX874EPA-40°C to +85°C8 Plastic DIP
MAX874ESA-40°C to +85°C8 SO
*Dice are specified at +25°C only.
Pin Configuration
TOP VIEW

Hand-Held Instruments
Battery-Operated Equipment
Power Supplies

Applications

Typical Operating Circuit
35..00VV ((MMAAXX887742))
VNIVTUOMMAAXX887742
TRIM

DNG

REFERENCE WITH TRIMMED OUTPUT

I.C.18COMP
V
IN
27I.C.
MAX872
TEMP3
MAX874
6V
OUT
GND45TRIM
DIP/SO

________________________________________________________________Maxim Integrated Products1
For free samples & the latest literature: http:
/
www.maxim-ic.com, or phone [phone].
For sma
l
orders, phone [phone].

10µA, Low-Dropout,
Precision Voltage References
ABSOLUTE MAXIMUM RATINGS
Supply Voltage.......................................................................24VOperating Temperature Ranges
Output Short-Circuit Duration..........Continuous to Either SupplyMAX87_C__.........................................................0°C to +70°C
C
COMP
Input...........................................................-0.3V to V
OUT
MAX87_E__......................................................-40°C to +85°C
TRIM Input...................................................-0.3V to (V+ 0.3V)
NIStorage Temperature Range.............................-65°C to +150°C
TEMP Output...............................................-0.3V to (V+ 0.3V)
NIJunction Temperature Range (T)......................-65°C to +160°C
jContinuous Power Dissipation (T= +70°C)
ALead Temperature (soldering, 10sec).............................+300°C
Plastic DIP (derate 9.09mW/°C above +70°C).............727mW
SO (derate 5.88mW/°C above +70°C)..........................471mW
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.
ELECTRICAL CHARACTERISTICS—MAX872
(V= 2.7V, I= 0mA, T= +25°C, unless otherwise noted.)
ALNIPARAMETERSYMBOLCONDITIONS
Output VoltageV
TUOOutput Voltage Noisee0.1Hz to 10Hz
nV= 4.5V to 20V
NILine RegulationV/V
NITUOV= 2.7V to 5.5V
NISourcing 0mA to 0.5mA
Load Regulation (Note 1)V/I
OUTOUT
Sinking 0mA to -0.5mA
Quiescent Supply CurrentI
QChange in Supply Current vs. VI/VV= 2.7V to 20V
INQININ
Vshort to GND
TUOShort-Circuit Output CurrentI
CSV
OUT
short to V
IN
TEMP VoltageV
PMETV
OUT
Adjustment RangeV
ADJ
V
OUT
³
V
OUT
+ 0.2V

ELECTRICAL CHARACTERISTICS—MAX874
(V
IN
= 4.3V, I
L
= 0mA, T
A
= +25°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONS
Output VoltageV
OUT
Output Voltage Noisee
n
0.1Hz to 10Hz
Line RegulationV
OUT
/V
IN
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.5mA
Load Regulation (Note 1)V
OUT
/I
OUT
Sinking 0mA to -0.5mA
Quiescent Supply CurrentI
Q
Change in Supply Current vs. V
IN
I
Q
/V
IN
V
IN
= 4.3V to 20V
V
OUT
short to GND
Short-Circuit Output CurrentI
SC
V
OUT
short to V
IN
TEMP VoltageV
TEMP
V
OUT
Adjustment RangeV
ADJ
V
OUT
³
V
OUT
+ 0.2V

MINTYPMAXUNITS
2.4952.5002.505V
60µVp-p
21480250µV/V
0.20.5mV/mA
2146.510µA
0.350.55µA/V
516Am93096Vm+75/-20+100/-25mV

MINTYPMAXUNITS
4.0884.0964.104V
90µVp-p
1575µV/V
0.150.9mV/mA
5166.510µA
0.350.55µA/V
516Am525096Vm±150±200mV

2_______________________________________________________________________________________

10µA, Low-Dropout,
Precision Voltage References
ELECTRICAL CHARACTERISTICS—MAX872C
(V
IN
= 2.7V, I
L
= 0mA, T
A
= 0°C to +70°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONS
Output VoltageV
OUT
Output Voltage TemperatureTCV
OUT
Coefficient
V
IN
= 4.5V to 20V
Line RegulationV
OUT
/V
IN
V
IN
= 2.7V to 5.5V
Load Regulation (Note 1)V
OUT
/I
OUT
Sourcing 0mA to 0.4mA
Sinking 0mA to -0.4mA
Quiescent Supply CurrentI
Q
Change in Supply Current vs. V
IN
I
Q
/V
IN
V
IN
= 2.7V to 20V
V
OUT
Adjustment RangeV
ADJ
V
IN
³
V
OUT
+ 0.2V
TEMP Output TemperatureTCV
TEMP
Coefficient

MINTYPMAXUNITS
2.49052.5095V
2040ppm/°C
20µV/V
00301.56mV/mA
51Aµ0.7µA/V
+75/-20mV
2.3mV/°C

ELECTRICAL CHARACTERISTICS—MAX874C
(V
IN
= 4.3V, I
L
= 0mA, T
A
= 0°C to +70°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Output VoltageV
OUT
4.08054.1115V
Output Voltage TemperatureTCV
OUT
2040ppm/°C
Coefficient
Line RegulationV
OUT
/V
IN
V
IN
= 4.3V to 20V75µV/V
Load Regulation (Note 1)V
OUT
/I
OUT
Sourcing 0mA to 0.4mA1.0mV/mA
Sinking 0mA to -0.4mA25
Quiescent Supply CurrentI
Q
15µA
Change in Supply Current vs. V
IN
I
Q
/V
IN
V
IN
= 4.3V to 20V0.7µA/V
V
OUT
Adjustment RangeV
ADJ
V
IN
³
V
OUT
+ 0.2V±150mV
TEMP Output TemperatureTCV
TEMP
2.3mV/°C
Coefficient
Note 1:
If the load current exceeds 300µA, connect a minimum of 1000pF from V
OUT
to GND. Note that if a capacitor larger than
1000pF is used, a compensation capacitor of C
OUT
/100 must be connected from V
OUT
to COMP.

_______________________________________________________________________________________3

10µA, Low-Dropout,
Precision Voltage References
ELECTRICAL CHARACTERISTICS—MAX872E
(V
IN
= 2.7V, I
L
= 0mA, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONS
Output VoltageV
OUT
Output Voltage TemperatureTCV
OUT
Coefficient
V
IN
= 4.5V to 20V
Line RegulationV
OUT
/V
IN
V
IN
= 2.7V to 5.5V
Load Regulation V
OUT
/I
OUT
Sourcing 0mA to 0.30mA
Sinking 0mA to -0.30mA
Quiescent Supply CurrentI
Q
Change in Supply Current vs. V
IN
I
Q
/V
IN
V
IN
= 2.7V to 20V
V
OUT
Adjustment RangeV
ADJ
V
IN
³
V
OUT
+ 0.2V
TEMP Output TemperatureTCV
TEMP
Coefficient

ELECTRICAL CHARACTERISTICS—MAX874E
(V
IN
= 4.3V, I
L
= 0mA, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONS
Output VoltageV
OUT
OCuotepffuitc iVeonlttage TemperatureTCV
OUT
Line RegulationV
OUT
/V
IN
V
IN
= 4.3V to 20V
Load Regulation V
OUT
/I
OUT
Sourcing 0mA to 0.30mA
Sinking 0mA to -0.30mA
Quiescent Supply CurrentI
Q
Change in