MAXIM MAX875

19-0038; Rev 3; 6/07
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
The MAX873/MAX875/MAX876 precision 2.5V, 5V, and
10V references offer excellent accuracy and very low
power consumption. Extremely low temperature drift
combined with excellent line and load regulation permit
stable operation over a wide range of electrical and environmental conditions. Operation for the MAX873 is guaranteed with a +4.5V supply, making the part ideal in
systems running from a +5V ±10% supply. Low 10Hz to
1kHz noise—typically 3.8µVRMS, 9µVRMS, and 18µVRMS,
respectively, for the MAX873, MAX875, MAX876—make
the parts suitable for 12-bit data-acquisition systems.
A TRIM pin facilitates adjustment of the reference voltage
over a ±6% range, using only a 100kΩ potentiometer. A
voltage output proportional to temperature provides a
source for temperature compensation circuits, temperature warning circuits, and other applications.
Features
♦ MAX873/MAX875/MAX876
+2.5V/+5V/+10V Outputs
±1.5mV/±2.0mV/±3.0mV (max) Initial Accuracy
♦ 7ppm/°C (max) Temperature Coefficient
♦ 450µA (max) Quiescent Current
♦ Low Noise: 3.8µVP-P (typ at 2.5V)
♦ Sources 10mA, Sinks 2mA
♦ 15ppm/mA Load Regulation (max)
♦ 4ppm/V Line Regulation (max)
♦ Wide Supply Voltage Range, +4.5V to +18V
(MAX873)
♦ TEMP Output Proportional to Temperature
Applications
12-Bit ADCs and DACs
Typical Operating Circuit
V+
Digital Multimeters
Portable Data-Acquisition Systems
IN
Low-Power Test Equipment
0.1µF*
MAX873
MAX875
MAX876
+2.5V (MAX873)
+5.0V (MAX875)
+10.0V (MAX876)
GND
*OPTIONAL
Pin Configuration appears at end of data sheet.
OUT
0V
Ordering Information/Selector Guide
PINPACKAGE
PART
OUTPUT
VOLTAGE
(V)
MAX
TEMPCO
(ppm/°C)
INITIAL
ACCURACY
%
PKG
CODE
S8-4
MAX873AESA+
8 SO
2.500
7
± 0.06
MAX873BESA+
8 SO
2.500
20
± 0.10
S8-4
MAX875AESA+
8 SO
5.000
7
± 0.04
S8-4
MAX875BESA+
8 SO
5.000
20
± 0.06
S8-4
MAX876AESA+
8 SO
10.000
7
± 0.03
S8-4
± 0.05
S8-4
MAX876BESA+
8 SO
10.000
20
+Denotes a lead-free package.
Note: All devices are specified over the -40°C to +85°C operating temperature range.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX873/MAX875/MAX876
General Description
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +20V
OUT, TRIM, TEMP, TEST ..............................- 0.3V to (IN + 0.3V)
Output Short-Circuit Duration (to GND)....................................5s
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C) .........................471mW
Operating Temperature Ranges:
MAX87_ _E_A ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Junction Temperature (TJ) ...............................................+150°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.
ELECTRICAL CHARACTERISTICS—MAX873
(VIN = +5V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output-Voltage Drift
(Note 1)
Output-Noise Voltage
SYMBOL
VOUT
TCVOUT
en
Line Regulation
CONDITIONS
2.4985
2.5000
2.5015
2.4975
2.5000
2.5025
MAX873A
2
7
MAX873B
5
20
TA = +25°C
IL = 0 to -1mA (sink)
ISC
UNITS
V
ppm/°C
0.1Hz to 10Hz
3.8
µVP-P
10Hz to 1kHz
6.8
µVRMS
TA = +25°C
1
4.0
TA = -40°C to +85°C
2
6
TA = +25°C
3
15
TA = -40°C to +85°C
Load Regulation
Short-Circuit Output Current
MAX
MAX873A (0.06%)
IL = 0 to 10mA
(source)
IQ
TYP
MAX873B (0.10%)
TA = +25°C
VIN = 4.5V to 18V
Quiescent Supply Current
MIN
3
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900
TA = +25°C
300
450
TA = -40°C to +85°C
300
600
Output shorted to GND
60
VOUT Adjust Range
Long-Term Output Drift
ppm/V
ppm/mA
µA
mA
±100
mV
50
ppm/kh
TEMP PIN
Voltage Output
Temperature Sensitivity
VTEMP
TA = +25°C
TCVTEMP
570
mV
1.9
mV/°C
ELECTRICAL CHARACTERISTICS—MAX875
(VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output Voltage Drift
(Note 1)
Output-Noise Voltage
Line Regulation
2
SYMBOL
VOUT
TCVOUT
en
CONDITIONS
TA = +25°C
MIN
TYP
MAX
MAX875A (0.04%)
4.998
5.000
5.002
MAX875B (0.06%)
4.997
5.000
5.003
MAX875A
2
7
MAX875B
5
20
TA = +25°C
VIN = 7V to 18V
UNITS
V
ppm/°C
0.1Hz to 10Hz
9
µVP-P
10Hz to 1kHz
14.5
µVRMS
TA = +25°C
1
4.0
TA = -40°C to +85°C
2
6
_______________________________________________________________________________________
ppm/V
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
(VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
IL = 0 to 10mA
(source)
Load Regulation
IL = 0 to -1mA (sink)
Quiescent Supply Current
IQ
Short-Circuit Output Current
ISC
MIN
TYP
MAX
TA = +25°C
3
15
TA = -40°C to +85°C
3
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900
TA = +25°C
320
550
TA = -40°C to +85°C
320
700
Output shorted to GND
60
VOUT Adjust Range
Long-Term Output Drift
UNITS
ppm/mA
µA
mA
±300
mV
50
ppm/kh
TEMP PIN
Voltage Output
VTEMP
Temperature Sensitivity
TA = +25°C
TCVTEMP
630
mV
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX876
(VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Output Voltage
SYMBOL
VOUT
Output Voltage Drift
(Note 1)
TCVOUT
Output-Noise Voltage
en
Line Regulation
CONDITIONS
TA = +25°C
9.997
10.000
10.003
MAX876B (0.05%)
9.995
10.000
10.005
7
5
20
TA = +25°C
IL = 0 to -1mA (sink)
ISC
MAX876A (0.03%)
2
Load Regulation
Short-Circuit Output Current
MAX
MAX876B
IL = 0 to 10mA
(source)
IQ
TYP
MAX876A
VIN = 12V to 18V
Quiescent Supply Current
MIN
0.1Hz to 10Hz
18
10Hz to 1kHz
29
TA = +25°C
1
4.0
TA = -40°C to +85°C
1
6
TA = +25°C
1
15
TA = -40°C to +85°C
1
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900
550
TA = -40°C to +85°C
340
700
Long-Term Output Drift
ppm/°C
µVRMS
320
Output shorted to GND
V
µVP-P
TA = +25°C
VOUT Adjust Range
UNITS
60
ppm/V
ppm/mA
µA
mA
±600
mV
50
ppm/kh
TEMP PIN
Voltage Output
VTEMP
Temperature Sensitivity
TCVTEMP
TA = +25°C
630
mV
2.1
mV/°C
Note 1: Temperature coefficient is defined as maximum ∆VOUT divided by maximum ∆T of the temperature range.
_______________________________________________________________________________________
3
MAX873/MAX875/MAX876
ELECTRICAL CHARACTERISTICS—MAX875 (continued)
Typical Operating Characteristics
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
2.500
2.499
MAX873/75/76 toc02
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 2.5V)
10.001
10.000
9.999
9.998
9.997
9.996
9.995
9.994
THREE TYPICAL PARTS
2.498
-25
0
25
50
75
100
125
0
-0.25
TA = +125°C
-50
-25
0
25
50
75
100
-0.50
125
0
5
10
15
20
25
TEMPERATURE (°C)
SOURCE CURRENT (mA)
LOAD REGULATION
vs. SOURCE CURRENT (VOUT = 10V)
LOAD REGULATION
vs. SINK CURRENT (VOUT = 2.5V)
LOAD REGULATION
vs. SINK CURRENT (VOUT = 10V)
0
-0.25
TA = -40°C
-0.50
TA = +25°C
0.50
TA = +125°C
0.25
0
TA = -40°C
-0.25
5
10
15
20
25
30
TA = -40°C
TA = +125°C
0.5
0
TA = +25°C
-0.5
-1.0
-0.50
0
1.5
1.0
30
MAX873/75/76 toc06
0.75
2.0
OUTPUT VOLTAGE CHANGE (mV)
TA = +125°C
MAX873/75/76 toc05
TA = +25°C
0.25
1.00
OUTPUT VOLTAGE CHANGE (mV)
MAX873/75/76 toc04
0
0.5
1.0
1.5
0
2.0
0.5
1.0
1.5
2.0
SOURCE CURRENT (mA)
SINK CURRENT (mA)
SINK CURRENT (mA)
LINE REGULATION vs. TEMPERATURE
(VOUT = 2.5V)
LINE REGULATION vs. TEMPERATURE
(VOUT = 10V)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 2.5V)
60
TA = +125°C
40
20
250
TA = +125°C
200
TA = -40°C
150
100
50
10
15
20
25
INPUT VOLTAGE (V)
30
35
40
TA = +125°C
1.5
TA = +25°C
1.0
TA = -40°C
0.5
0
5
2.0
TA = +25°C
TA = +25°C
0
MAX873/75/76 toc09
TA = -40°C
2.5
DROPOUT VOLTAGE (V)
80
300
OUTPUT VOLTAGE CHANGE (µV)
MAX873/75/76 toc07
100
MAX873/75/76 toc08
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TEMPERATURE (°C)
0.50
0
TA = -40°C
0.25
THREE TYPICAL PARTS
9.993
-50
4
0.50
OUTPUT VOLTAGE CHANGE (mV)
10.002
OUTPUT VOLTAGE (V)
2.501
OUTPUT VOLTAGE (V)
10.003
MAX873/75/76 toc01
2.502
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 10V)
MAX873/75/76 toc03
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.5V)
OUTPUT VOLTAGE CHANGE (µV)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
12
16
20
24
28
32
INPUT VOLTAGE (V)
36
40
0
4
8
12
SOURCE CURRENT (mA)
_______________________________________________________________________________________
16
20
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
MAX873/MAX875/MAX876
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
-40
TA = +25°C
-20
-40
PSRR (dB)
PSRR (dB)
1.5
MAX873/75/76 toc12
-20
TA = +125°C
0
MAX873/75/76 toc11
2.0
DROPOUT VOLTAGE (V)
0
MAX873/75/76 toc10
2.5
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 10V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 10V)
-60
-80
-60
-80
-100
TA = -40°C
1.0
-100
-120
-140
0.001
0.5
0
4
8
12
16
20
0.1
1
10
100
-120
0.001
1000
0.01
0.1
1
10
100
1000
SOURCE CURRENT (mA)
FREQUENCY (kHz)
FREQUENCY (kHz)
OUTPUT IMPEDANCE vs. FREQUENCY
(VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 10V)
0.1
350
300
TA = +25°C
250
TA = -40°C
200
150
400
MAX873/75/76 toc15
TA = +125°C
TA = +125°C
350
SUPPLY CURRENT (µA)
1
MAX873/75/76 toc14
10
400
SUPPLY CURRENT (µA)
MAX873/75/76 toc13
100
OUTPUT IMPEDANCE (Ω)
0.01
300
250
TA = +25°C
200
TA = -40°C
150
100
100
50
50
0.01
0.01
0.1
1
10
100
0
1000
5
10
15
20
25
30
35
0
40
5
10
15
20
25
30
35
FREQUENCY (kHz)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 2.5V)
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 10V)
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 2.5V)
275
325
300
-25
0
25
50
75
TEMPERATURE (°C)
100
125
600
400
250
-50
700
500
275
250
MAX873/75/76 toc18
350
40
800
TEMP VOLTAGE (mV)
300
MAX873/75/76 toc17
325
375
SUPPLY CURRENT (µA)
MAX873/75/76 toc16
350
SUPPLY CURRENT (µA)
0
0
0.001
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
600
2.60
TWO TYPICAL PARTS
2.501
2.55
VOUT (V)
700
2.502
MAX873/75/76 toc20
800
2.65
OUTPUT VOLTAGE (V)
MAX873/75/76 toc19
900
2.50
2.500
2.45
2.499
500
2.40
400
2.498
2.35
-25
0
25
50
75
100
125
0
0.5
1.0
1.5
2.0
200
400
800
TIME (hours)
LONG-TERM STABILITY vs. TIME
(VOUT = 10.0V)
OUTPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY (VOUT = 2.5V)
OUTPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY (VOUT = 10V)
10.000
9.999
9.998
100
200
400
600
800
1000
10,000
1000
100
0.1
1
TIME (hours)
10
100
FREQUENCY (Hz)
1000
0.1
1
10
100
FREQUENCY (Hz)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 10V)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 2.5V)
MAX873/75/76 toc26
MAX873/75/76 toc25
4µV/div
1µV/div
1s/div
1000
MAX873/75/76 toc24
10.001
1000
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
MAX873/75/76 toc22
TWO TYPICAL PARTS
6
600
TRIM VOLTAGE (V)
10.002
0
0
2.5
TEMPERATURE (°C)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
-50
MAX873/75/76 toc23
TEMP VOLTAGE (mV)
LONG-TERM STABILITY vs. TIME
(VOUT = 2.500V)
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX873/75/76 toc21
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 10V)
VOUT (V)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
1s/div
_______________________________________________________________________________________
1000
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
MAX873/MAX875/MAX876
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO 20mA)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO 20mA)
MAX873/75/76 toc28
MAX873/75/76 toc27
20mA
IOUT
20mA
IOUT
0
0
VOUT
AC-COUPLED
1V/div
VOUT
AC-COUPLED
1V/div
10µs/div
10µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO 20mA)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
MAX873/75/76 toc30
MAX873/75/76 toc29
20mA
20mA
IOUT
IOUT
0
0
VOUT
AC-COUPLED
50mV/div
VOUT
AC-COUPLED
100mV/div
100µs/div
200µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX873/75/76 toc32
MAX873/75/76 toc31
0
0
IOUT
40µs/div
IOUT
-2mA
-2mA
VOUT
AC-COUPLED
200mV/div
VOUT
AC-COUPLED
20mV/div
200µs/div
_______________________________________________________________________________________
7
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO -2mA)
MAX873/75/76 toc34
MAX873/75/76 toc33
0
0
IOUT
IOUT
-2mA
-2mA
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
5mV/div
400µs/div
400µs/div
LINE TRANSIENT
(VOUT = 10V)
LINE TRANSIENT
(VOUT = 2.5V)
MAX873/75/76 toc35
MAX873/75/76 toc36
5.5V
4.5V
15.5V
VIN
1V/div
14.5V
VOUT
AC-COUPLED
200mV/div
VOUT
AC-COUPLED
200mV/div
VIN
COUT = 0
2µs/div
10µs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 0)
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 1µF)
MAX873/75/76 toc38
MAX873/75/76 toc37
VIN
2V/div
VIN
2V/div
GND
GND
VOUT
1V/div
VOUT
1V/div
GND
COUT = 0
10µs/div
8
GND
40µs/div
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 0)
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 1µF)
MAX873/75/76 toc39
MAX873/75/76 toc40
VIN
5V/div
VIN
5V/div
GND
GND
VOUT
5V/div
VOUT
5V/div
GND
GND
100µs/div
200µs/div
Pin Description
PIN
NAME
FUNCTION
1, 8
I.C.
Internally Connected. Do not connect externally.
2
IN
Positive Power-Supply Input
3
TEMP
Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die
temperature.
4
GND
Ground
5
TRIM
Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for
trimming. Leave unconnected to use the preset output voltage.
6
OUT
Output Voltage
7
N.C.
No Connection. Not internally connected.
Detailed Description
The MAX873/MAX875/MAX876 precision voltage references provide accurate preset +2.5V, +5.0V, and +10V
reference voltages from up to +40V input voltages. These
devices feature a proprietary temperature-coefficient
curvature-correction circuit and laser-trimmed thin-film
resistors that result in a very low 3ppm/°C temperature
coefficient and excellent 0.05% initial accuracy. The
MAX873/MAX875/MAX876 draw 340µA of supply current
and source 30mA or sink 2mA of load current.
Trimming the Output Voltage
Trim the factory-preset output voltage on the
MAX873/MAX875/MAX876 by placing a resistive divider
network between OUT, TRIM, and GND.
Use the following formula to calculate the change in
output voltage from its preset value:
∆VOUT = 2 x (VTRIM - VTRIM (open)) x k
where:
VTRIM = 0V to VOUT
VTRIM (open) = VOUT (nominal) / 2 (typ)
k = ±6% (typ)
For example, use a 50kΩ potentiometer (such as the
MAX5436) between OUT, TRIM, and GND with the
potentiometer wiper connected to TRIM (see Figure 2).
As the TRIM voltage changes from VOUT to GND, the
output voltage changes accordingly. Set R2 to 1MΩ or
less. Currents through resistors R1 and R2 add to the
quiescent supply current.
_______________________________________________________________________________________
9
MAX873/MAX875/MAX876
Typical Operating Characteristics (continued)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
Temp Output
The MAX873/MAX875/MAX876 provide a temperature
output proportional to die temperature. TEMP can be calculated from the following formula:
TEMP (V) = TJ (°K) x n
where TJ = the die temperature,
n = the temperature multiplier,
n =
VTEMP (at TJ = T0 )
≅ 1.9mV / °K
T0
TA = the ambient temperature.
Self-heating affects the die temperature and conversely,
the TEMP output. The TEMP equation assumes the output
is not loaded. If device power dissipation is negligible,
then TJ ≈ TA.
Applications Information
Bypassing/Output Capacitance
For the best line-transient performance, decouple the
input with a 0.1µF ceramic capacitor as shown in the
Typical Operating Circuit. Place the capacitor as close
to IN as possible. When transient performance is less
important, no capacitor is necessary.
The MAX873/MAX875/MAX876 do not require an output
capacitor for stability and are stable with capacitive
loads up to 100µF. In applications where the load or the
supply can experience step changes, a larger output
capacitor reduces the amount of overshoot (undershoot) and improves the circuit’s transient response.
Place output capacitors as close to the devices as possible for best performance.
Supply Current
The MAX873/MAX875/MAX876 consume 320µA (typ) of
quiescent supply current. This improved efficiency
reduces power dissipation and extends battery life.
Thermal Hysteresis
Thermal hysteresis is the change in the output voltage
at TA = +25°C before and after the device is cycled
over its entire operating temperature range. Hysteresis
is caused by differential package stress appearing
across the bandgap core transistors. The typical thermal hysteresis value is 120ppm.
Turn-On Time
The MAX873/MAX875/MAX876 typically turn on and settle
to within 0.1% of the preset output voltage in 150µs
(2.5V output). The turn-on time can increase up to
150µs with the device operating with a 1µF load.
Short-Circuited Outputs
The MAX873/MAX875/MAX876 feature a short-circuit-protected output. Internal circuitry limits the output current
to 60mA when short circuiting the output to ground.
The output current is limited to 3mA when short circuiting the output to the input.
10,000
1000
100
TEMPERATURE
COEFFICIENT
(ppm/°C)
8-BIT
10
10-BIT
12-BIT
1
14-BIT
16-BIT
0.1
18-BIT
0.01
1
10
OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
20-BIT
100
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
10
______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
In a data converter application, the reference voltage
of the converter must stay within a certain limit to keep
the error in the data converter smaller than the resolution limit through the operating temperature range.
Figure 1 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion
error to less than 1 LSB, as a function of the operating
temperature range (TMAX - TMIN) with the converter
resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only
parameter affecting accuracy.
In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltagereference changes.
( VOUT + 2V) TO 40V INPUT
IN
OUT
*
MAX873
MAX875
MAX876
TEMP
TRIM
REFERENCE
OUTPUT
MAX5436
50kΩ
POTENTIOMETER
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potentiometer
Pin Configuration
Chip Information
TRANSISTOR COUNT: 429
PROCESS: BiCMOS
TOP VIEW
I.C.*
1
IN
2
TEMP
3
MAX873
MAX875
MAX876
GND 4
8
I.C.*
7
N.C.
6
OUT
5
TRIM
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
______________________________________________________________________________________
11
MAX873/MAX875/MAX876
Temperature Coefficient vs. Operating
Temperature Range for a
1 LSB Maximum Error
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
Revision History
Pages changed at Rev 3: 1–12
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.