MAX873BCSA-T [MAXIM]
Three Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PDSO8, PLASTIC, SO-8;
| 型号： | MAX873BCSA-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Three Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PDSO8, PLASTIC, SO-8 光电二极管 |
| 文件： | 总12页 (文件大小：370K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0038; Rev 3; 6/07
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
General Description
Features
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 envi-
ronmental conditions. Operation for the MAX873 is guar-
anteed with a +4.5V supply, making the part ideal in
systems running from a +5V 10ꢀ supply. ꢁow 10ꢂH to
♦ MAX873/MAX875/MAX876
+2.5V/+5V/+10V Outputs
1.5ꢀV/ 2.0ꢀV/ 3.0ꢀV mꢀꢁ(ꢂ x)ꢃtꢃꢁꢄ Allucꢁlr
♦ 7ppꢀ/°C mꢀꢁ(ꢂ Teꢀpecꢁtuce Coeffꢃlꢃe)t
♦ 450µA mꢀꢁ(ꢂ Quꢃesle)t Cucce)t
♦ Low Noꢃse: 3.8µV
mtrp ꢁt 2.5Vꢂ
P-P
1kꢂH noise—typically 3.8µV
, 9µV
, and 18µV
,
RMS
RMS
RMS
♦ Soucles 10ꢀA, Sꢃ)ks 2ꢀA
respectively, for the MAX873, MAX875, MAX876—make
the parts suitable for 12-bit data-acquisition systems.
♦ 15ppꢀ/ꢀA Loꢁd Reguꢄꢁtꢃo) mꢀꢁ(ꢂ
♦ 4ppꢀ/V Lꢃ)e Reguꢄꢁtꢃo) mꢀꢁ(ꢂ
A TRIM pin facilitates adjustment of the reference voltage
over a 6ꢀ range, using only a 100kΩ potentiometer. A
voltage output proportional to temperature provides a
source for temperature compensation circuits, tempera-
ture warning circuits, and other applications.
♦ Wꢃde Suppꢄr Voꢄtꢁge Rꢁ)ge, +4.5V to +18V
mMAX873ꢂ
♦ TEMP Output Pcopoctꢃo)ꢁꢄ to Teꢀpecꢁtuce
Applications
Typical Operating Circuit
12-Bit ADCs and DACs
V+
Digital Multimeters
Portable Data-Acquisition Systems
ꢁow-Power Test Equipment
IN
MAX873
MAX875
+2.5V (MAX873)
+5.0V (MAX875)
+10.0V (MAX876)
MAX876
0.1µF*
OUT
GND
*OPTIONAL
0V
Pꢃ) Co)fꢃgucꢁtꢃo) ꢁppeꢁcs ꢁt e)d of dꢁtꢁ sheet.
Ordering Information/Selector Guide
OUTPUT
PxN-
PACKAGE
MAX
TEMPCO
mppꢀ/°Cꢂ
xNxTxAL
ACCURACY
%
PKG
CODE
PART
VOLTAGE
mVꢂ
MAX873AESA+
MAX873BESA+
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
2.500
2.500
5.000
5.000
10.000
10.000
7
20
7
0.06
0.10
0.04
0.06
0.03
0.05
S8-4
S8-4
S8-4
S8-4
S8-4
S8-4
MAX875AESA+
MAX875BESA+
20
7
MAX876AESA+
MAX876BESA+
20
+Denotes a lead-free package.
Note: All devices are specified over the -40°C to +85°C operating temperature range.
________________________________________________________________ Mꢁ(ꢃꢀ x)tegcꢁted Pcodults
1
Foc pcꢃlꢃ)g, deꢄꢃvecr, ꢁ)d ocdecꢃ)g ꢃ)focꢀꢁtꢃo), pꢄeꢁse lo)tꢁlt Mꢁ(ꢃꢀ Dꢃcelt ꢁt 1-888-629-4642,
oc vꢃsꢃt Mꢁ(ꢃꢀ’s websꢃte ꢁt www.ꢀꢁ(ꢃꢀ-ꢃl.loꢀ.
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
ABSOLUTE MAXxMUM RATxNGS
IN to GND...............................................................-0.3V to +20V
OUT, TRIM, TEMP, TEST..............................- 0.3V to (IN + 0.3V)
Output Short-Circuit Duration (to GND)....................................5s
Operating Temperature Ranges:
MAX87_ _E_A ..................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
ꢁead Temperature (soldering, 10s) .................................+300°C
Continuous Power Dissipation (T = +70°C)
A
SO (derate 5.88mW/°C above +70°C).........................471mW
Junction Temperature (T )...............................................+150°C
J
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.
ELECTRxCAL CHARACTERxSTxCS—MAX873
(V = +5V, I = 0mA, C
< 100pF, T = -40°C to +85°C, unless otherwise noted.)
A
IN
ꢁ
ꢁOAD
PARAMETER
SYMBOL
CONDxTxONS
MAX873A (0.06ꢀ)
MxN
TYP
2.5000
2.5000
2
MAX
2.5015
2.5025
7
UNxTS
2.4985
2.4975
Output Voltage
V
T
= +25°C
V
OUT
A
MAX873B (0.10ꢀ)
MAX873A
MAX873B
Output-Voltage Drift
(Note 1)
TCV
ppm/°C
OUT
n
5
20
0.1ꢂH to 10ꢂH
10ꢂH to 1kꢂH
3.8
6.8
1
µV
P-P
Output-Noise Voltage
ꢁine Regulation
e
T = +25°C
A
µV
RMS
T
A
T
A
T
A
T
A
T
A
T
A
= +25°C
4.0
6
V
= 4.5V to 18V
ppm/V
ppm/mA
µA
IN
= -40°C to +85°C
= +25°C
2
3
15
I = 0 to 10mA
ꢁ
(source)
35/MAX876
= -40°C to +85°C
= +25°C
3
20
ꢁoad Regulation
100
150
300
300
60
900
1900
450
600
I = 0 to -1mA (sink)
ꢁ
= -40°C to +85°C
T
T
= +25°C
A
Quiescent Supply Current
Short-Circuit Output Current
I
Q
= -40°C to +85°C
A
I
Output shorted to GND
mA
mV
SC
V
Adjust Range
100
50
OUT
ꢁong-Term Output Drift
TEMP PxN
ppm/kh
Voltage Output
V
T
A
= +25°C
570
1.9
mV
TEMP
Temperature Sensitivity
TCV
mV/°C
TEMP
ELECTRxCAL CHARACTERxSTxCS—MAX875
(V = +15V, I = 0mA, C
< 100pF, T = -40°C to +85°C, unless otherwise noted.)
A
IN
ꢁ
ꢁOAD
PARAMETER
SYMBOL
CONDxTxONS
MAX875A (0.04ꢀ)
MxN
4.998
4.997
TYP
MAX
5.002
5.003
7
UNxTS
5.000
Output Voltage
V
T
= +25°C
V
OUT
A
MAX875B (0.06ꢀ)
5.000
MAX875A
MAX875B
2
5
Output Voltage Drift
(Note 1)
TCV
e
ppm/°C
OUT
20
0.1ꢂH to 10ꢂH
10ꢂH to 1kꢂH
9
µV
P-P
Output-Noise Voltage
ꢁine Regulation
T = +25°C
A
n
14.5
1
µV
RMS
T
= +25°C
4.0
6
A
A
V
= 7V to 18V
ppm/V
IN
T
= -40°C to +85°C
2
2
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
ELECTRxCAL CHARACTERxSTxCS—MAX875 mlo)tꢃ)uedꢂ
(V = +15V, I = 0mA, C
< 100pF, T = -40°C to +85°C, unless otherwise noted.)
A
IN
ꢁ
ꢁOAD
PARAMETER
SYMBOL
CONDxTxONS
MxN
TYP
3
MAX
15
UNxTS
T
A
T
A
T
A
T
A
= +25°C
I = 0 to 10mA
ꢁ
(source)
= -40°C to +85°C
= +25°C
3
20
ꢁoad Regulation
ppm/mA
100
150
320
320
60
900
1900
550
700
I = 0 to -1mA (sink)
ꢁ
= -40°C to +85°C
T
T
= +25°C
A
A
Quiescent Supply Current
Short-Circuit Output Current
I
µA
Q
= -40°C to +85°C
I
Output shorted to GND
mA
mV
SC
V
Adjust Range
300
50
OUT
ꢁong-Term Output Drift
TEMP PxN
ppm/kh
Voltage Output
V
T
= +25°C
A
630
2.1
mV
TEMP
Temperature Sensitivity
TCV
mV/°C
TEMP
ELECTRxCAL CHARACTERxSTxCS—MAX876
(V = +15V, I = 0mA, C
< 100pF, T = -40°C to +85°C, unless otherwise noted.)
A
IN
ꢁ
ꢁOAD
PARAMETER
SYMBOL
CONDxTxONS
MAX876A (0.03ꢀ)
MxN
9.997
9.995
TYP
10.000
10.000
2
MAX
10.003
10.005
7
UNxTS
Output Voltage
V
T
= +25°C
A
V
OUT
MAX876B (0.05ꢀ)
MAX876A
MAX876B
Output Voltage Drift
(Note 1)
TCV
e
ppm/°C
OUT
5
20
0.1ꢂH to 10ꢂH
10ꢂH to 1kꢂH
18
µV
P-P
Output-Noise Voltage
ꢁine Regulation
T = +25°C
A
n
29
µV
RMS
T
A
T
A
T
A
T
A
T
A
T
A
= +25°C
1
4.0
6
V
= 12V to 18V
ppm/V
ppm/mA
µA
IN
= -40°C to +85°C
= +25°C
1
1
15
I = 0 to 10mA
ꢁ
(source)
= -40°C to +85°C
= +25°C
1
20
ꢁoad Regulation
100
150
320
340
60
900
1900
550
700
I = 0 to -1mA (sink)
ꢁ
= -40°C to +85°C
T
T
= +25°C
A
A
Quiescent Supply Current
Short-Circuit Output Current
I
Q
= -40°C to +85°C
I
Output shorted to GND
mA
mV
SC
V
Adjust Range
600
50
OUT
ꢁong-Term Output Drift
TEMP PxN
ppm/kh
Voltage Output
V
T
= +25°C
A
630
2.1
mV
TEMP
Temperature Sensitivity
TCV
mV/°C
TEMP
Note 1: Temperature coefficient is defined as maximum ∆V
divided by maximum ∆T of the temperature range.
OUT
_______________________________________________________________________________________
3
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
Typical Operating Characteristics
(V = +5V for V
IN
= +2.5V, V = +15V for V
= +10V, I
= 0, T = +25°C, unless otherwise noted.)
OUT
IN
OUT
OUT A
OUTPUT VOLTAGE vs. TEMPERATURE
(V = 2.5V)
OUTPUT VOLTAGE vs. TEMPERATURE
(V = 10V)
LOAD REGULATION vs.
OUT
SOURCE CURRENT (V
= 2.5V)
OUT
OUT
2.502
2.501
2.500
2.499
2.498
10.003
10.002
10.001
10.000
9.999
9.998
9.997
9.996
9.995
9.994
9.993
0.50
0.25
0
T
= -40°C
A
T
= +25°C
A
-0.25
-0.50
T
= +125°C
A
THREE TYPICAL PARTS
THREE TYPICAL PARTS
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
0
5
10
15
20
25
30
TEMPERATURE (°C)
TEMPERATURE (°C)
SOURCE CURRENT (mA)
LOAD REGULATION
vs. SOURCE CURRENT (V
LOAD REGULATION
LOAD REGULATION
= 10V)
vs. SINK CURRENT (V
= 2.5V)
vs. SINK CURRENT (V = 10V)
OUT
OUT
OUT
0.50
0.25
0
1.00
0.75
0.50
2.0
1.5
1.0
T
= +25°C
A
35/MAX876
T
= -40°C
A
T
A
= +25°C
T
= +125°C
A
T
= +125°C
A
T
= +125°C
A
0.25
0
0.5
0
T
= +25°C
A
T
= -40°C
A
-0.25
-0.50
T
= -40°C
A
-0.25
-0.5
-0.50
-1.0
0
5
10
15
20
25
30
0
0.5
1.0
SINK CURRENT (mA)
1.5
2.0
0
0.5
1.0
1.5
2.0
SOURCE CURRENT (mA)
SINK CURRENT (mA)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (V = 2.5V)
LINE REGULATION vs. TEMPERATURE
(V = 2.5V)
LINE REGULATION vs. TEMPERATURE
(V = 10V)
OUT
OUT
OUT
100
300
250
200
150
100
50
2.5
2.0
1.5
1.0
0.5
80
60
40
20
T
= +125°C
A
T
= -40°C
A
T
= +125°C
A
T
= -40°C
A
T
= +125°C
A
T
= +25°C
= -40°C
A
T
A
T
= +25°C
A
T
= +25°C
A
0
0
0
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
12
16
20
24
28
32
36
40
0
4
8
12
16
20
INPUT VOLTAGE (V)
SOURCE CURRENT (mA)
4
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
Typical Operating Characteristics (continued)
(V = +5V for V
IN
= +2.5V, V = +15V for V
= +10V, I
= 0, T = +25°C, unless otherwise noted.)
OUT
IN
OUT
OUT A
POWER-SUPPLY REJECTION RATIO
MINIMUM INPUT-OUTPUT DIFFERENTIAL
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (V
= 10V)
vs. SOURCE CURRENT (V
= 10V)
vs. FREQUENCY (V
= 2.5V)
OUT
OUT
OUT
0
0
-20
2.5
2.0
1.5
1.0
0.5
-20
-40
T
A
= +125°C
-40
-60
-60
T
T
= +25°C
= -40°C
A
-80
-80
-100
-120
-140
A
-100
-120
0.001 0.01
0.1
1
10
100 1000
0.001 0.01
0.1
1
10
100 1000
0
4
8
12
16
20
FREQUENCY (kHz)
FREQUENCY (kHz)
SOURCE CURRENT (mA)
SUPPLY CURRENT vs. INPUT VOLTAGE
(V = 10V)
SUPPLY CURRENT vs. INPUT VOLTAGE
(V = 2.5V)
OUTPUT IMPEDANCE vs. FREQUENCY
OUT
(V
OUT
= 2.5V)
OUT
400
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
100
10
T
= +125°C
T
= +125°C
A
A
T
= +25°C
A
T
= +25°C
A
1
T
= -40°C
A
T
= -40°C
0.1
A
0.01
0.001
0
0
0
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
0
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
TEMP VOLTAGE
(V
OUT
= 2.5V)
(V
OUT
= 10V)
vs. TEMPERATURE (V
= 2.5V)
OUT
350
325
300
275
250
375
350
325
300
275
250
800
700
600
500
400
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
Typical Operating Characteristics (continued)
(V = +5V for V
IN
= +2.5V, V = +15V for V
= +10V, I
= 0, T = +25°C, unless otherwise noted.)
OUT
IN
OUT
OUT A
TEMP VOLTAGE
vs. TEMPERATURE (V
LONG-TERM STABILITY vs. TIME
(V = 2.500V)
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (V
= 10V)
= 2.5V)
OUT
OUT
OUT
900
800
700
600
500
400
2.65
2.502
2.501
2.500
2.499
2.498
TWO TYPICAL PARTS
2.60
2.55
2.50
2.45
2.40
2.35
-50 -25
0
25
50
75 100 125
0
200
400
600
800
1000
0
0.5
1.0
1.5
2.0
2.5
TEMPERATURE (°C)
TIME (hours)
TRIM VOLTAGE (V)
LONG-TERM STABILITY vs. TIME
OUTPUT-VOLTAGE NOISE DENSITY
OUTPUT-VOLTAGE NOISE DENSITY
(V
OUT
= 10.0V)
vs. FREQUENCY (V
= 2.5V)
vs. FREQUENCY (V
= 10V)
OUT
OUT
10.002
10.001
10.000
9.999
1000
10,000
TWO TYPICAL PARTS
35/MAX876
1000
9.998
100
100
0
200
400
600
800
1000
0.1
1
10
FREQUENCY (Hz)
100
1000
0.1
1
10
FREQUENCY (Hz)
100
1000
TIME (hours)
0.1Hz TO 10Hz OUTPUT NOISE
(V = 10V)
0.1Hz TO 10Hz OUTPUT NOISE
(V
OUT
= 2.5V)
OUT
MAX873/75/76 toc26
MAX873/75/76 toc25
4µV/div
1µV/div
1s/div
1s/div
6
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
Typical Operating Characteristics (continued)
(V = +5V for V
IN
= +2.5V, V = +15V for V
IN
= +10V, I = 0, T = +25°C, unless otherwise noted.)
OUT A
OUT
OUT
LOAD TRANSIENT
LOAD TRANSIENT
(V
OUT
= 10V, C
= 0, 0 TO 20mA)
OUT
MAX873/75/76 toc28
(V
OUT
= 2.5V, C
= 0, 0 TO 20mA)
OUT
MAX873/75/76 toc27
20mA
20mA
I
OUT
I
OUT
0
0
V
V
OUT
OUT
AC-COUPLED
1V/div
AC-COUPLED
1V/div
10µs/div
10µs/div
LOAD TRANSIENT
LOAD TRANSIENT
(V
OUT
= 10V, C
= 1µF, 0 TO 20mA)
OUT
MAX873/75/76 toc30
(V
OUT
= 2.5V, C
= 1µF, 0 TO +20mA)
OUT
MAX873/75/76 toc29
20mA
20mA
I
OUT
I
OUT
0
0
V
V
OUT
OUT
AC-COUPLED
100mV/div
AC-COUPLED
50mV/div
100µs/div
200µs/div
LOAD TRANSIENT
LOAD TRANSIENT
(V
OUT
= 10V, C
= 0, 0 TO -2mA)
OUT
MAX873/75/76 toc32
(V
OUT
= 2.5V, C
= 0, 0 TO -2mA)
OUT
MAX873/75/76 toc31
0
0
I
OUT
I
OUT
-2mA
-2mA
V
V
OUT
OUT
AC-COUPLED
20mV/div
AC-COUPLED
200mV/div
200µs/div
40µs/div
_______________________________________________________________________________________
7
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
Typical Operating Characteristics (continued)
(V = +5V for V
IN
= +2.5V, V = +15V for V
IN
= +10V, I
= 0, T = +25°C, unless otherwise noted.)
OUT
OUT
OUT A
LOAD TRANSIENT
LOAD TRANSIENT
(V
OUT
= 10V, C
= 1µF, 0 TO -2mA)
OUT
MAX873/75/76 toc34
(V
OUT
= 2.5V, C
= 1µF, 0 TO -2mA)
OUT
MAX873/75/76 toc33
0
0
I
OUT
I
OUT
-2mA
-2mA
V
V
OUT
OUT
AC-COUPLED
5mV/div
AC-COUPLED
20mV/div
400µs/div
400µs/div
LINE TRANSIENT
LINE TRANSIENT
(V
= 10V)
OUT
(V
= 2.5V)
OUT
MAX873/75/76 toc36
MAX873/75/76 toc35
5.5V
15.5V
V
IN
35/MAX876
V
IN
1V/div
14.5V
4.5V
V
OUT
V
OUT
AC-COUPLED
200mV/div
AC-COUPLED
200mV/div
C
= 0
OUT
2µs/div
10µs/div
TURN-ON TRANSIENT
TURN-ON TRANSIENT
(V = 2.5V, C = 1µF)
OUT
(V
OUT
= 2.5V, C
= 0)
OUT
OUT
MAX873/75/76 toc38
MAX873/75/76 toc37
V
IN
2V/div
V
IN
2V/div
GND
GND
V
OUT
1V/div
V
OUT
1V/div
GND
C
= 0
OUT
GND
40µs/div
10µs/div
8
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
Typical Operating Characteristics (continued)
(V = +5V for V
IN
= +2.5V, V = +15V for V
IN
= +10V, I = 0, T = +25°C, unless otherwise noted.)
OUT A
OUT
OUT
TURN-ON TRANSIENT
TURN-ON TRANSIENT
(V
OUT
= 10V, C
= 0)
OUT
MAX873/75/76 toc39
(V
= 10V, C
= 1µF)
OUT
MAX873/75/76 toc40
OUT
V
IN
V
IN
5V/div
5V/div
GND
GND
V
OUT
V
OUT
5V/div
5V/div
GND
GND
100µs/div
200µs/div
Pin Description
PxN
1, 8
2
NAME
I.C.
FUNCTxON
Internally Connected. Do not connect externally.
Positive Power-Supply Input
IN
Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die
temperature.
3
4
5
TEMP
GND
TRIM
Ground
Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for
trimming. ꢁeave unconnected to use the preset output voltage.
6
7
OUT
N.C.
Output Voltage
No Connection. Not internally connected.
Use the following formula to calculate the change in
output voltage from its preset value:
Detailed Description
The MAX873/MAX875/MAX876 precision voltage refer-
ences 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 0.05ꢀ initial accuracy. The
MAX873/MAX875/MAX876 draw 340µA of supply current
and source 30mA or sink 2mA of load current.
∆V
= 2 x (V
- V
) x k
TRIM (open)
OUT
TRIM
where:
V
TRIM
= 0V to V
OUT
V
= V
(nominal) / 2 (typ)
TRIM (open)
OUT
k = ±6ꢀ (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).
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.
As the TRIM voltage changes from V
to GND, the
OUT
output voltage changes accordingly. Set R2 to 1MΩ or
less. Currents through resistors R1 and R2 add to the
quiescent supply current.
_______________________________________________________________________________________
9
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
supply can experience step changes, a larger output
Temp Output
The MAX873/MAX875/MAX876 provide a temperature
output proportional to die temperature. TEMP can be cal-
culated from the following formula:
capacitor reduces the amount of overshoot (under-
shoot) and improves the circuit’s transient response.
Place output capacitors as close to the devices as pos-
sible for best performance.
TEMP (V) = T (°K) x n
J
Supply Current
The MAX873/MAX875/MAX876 consume 320µA (typ) of
quiescent supply current. This improved efficiency
reduces power dissipation and extends battery life.
where T = the die temperature,
J
n = the temperature multiplier,
V
(at T = T )
J 0
TEMP
n =
≅1.9mV/°K
Thermal Hysteresis
T
0
Thermal hysteresis is the change in the output voltage
at T = +25°C before and after the device is cycled
A
T = the ambient temperature.
A
over its entire operating temperature range. ꢂysteresis
is caused by differential package stress appearing
across the bandgap core transistors. The typical ther-
mal hysteresis value is 120ppm.
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 T ≈ T .
J
A
Turn-On Time
The MAX873/MAX875/MAX876 typically turn on and settle
to within 0.1ꢀ 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.
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.
Short-Circuited Outputs
The MAX873/MAX875/MAX876 feature a short-circuit-pro-
tected 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 circuit-
ing the output to the input.
35/MAX876
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
10,000
1000
100
8-BIT
TEMPERATURE
10
10-BIT
COEFFICIENT
(ppm/°C)
12-BIT
1
14-BIT
16-BIT
0.1
18-BIT
20-BIT
100
0.01
1
10
OPERATING TEMPERATURE RANGE (T
- T ) (°C)
MAX MIN
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 ꢁSB Maximum Error
10 ______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
35/MAX876
Temperature Coefficient vs. Operating
Temperature Range for a
( V
OUT
+ 2V) TO 40V INPUT
1 LSB Maximum Error
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 resolu-
tion limit through the operating temperature range.
Figure 1 shows the maximum allowable reference-volt-
age temperature coefficient to keep the conversion
error to less than 1 ꢁSB, as a function of the operating
IN
REFERENCE
OUTPUT
OUT
temperature range (T
- T
) with the converter
MIN
MAX
*
MAX873
MAX875
MAX876
resolution as a parameter. The graph assumes the ref-
erence-voltage temperature coefficient as the only
parameter affecting accuracy.
MAX5436
50kΩ
POTENTIOMETER
TEMP
TRIM
In reality, the absolute static accuracy of a data con-
verter is dependent on the combination of many para-
meters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage-
reference changes.
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potentiometer
Pin Configuration
Chip Information
TRANSISTOR COUNT: 429
TOP VIEW
PROCESS: BiCMOS
I.C.*
IN
1
2
3
4
8
7
6
5
I.C.*
N.C.
OUT
TRIM
MAX873
MAX875
MAX876
TEMP
GND
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
______________________________________________________________________________________ 11
Low-Power, Low-Drift, +2.5V/+5V/+10V
Precision Voltage References
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.ꢀꢁ(ꢃꢀ-ꢃl.loꢀ/pꢁlkꢁges.)
INCHES
MILLIMETERS
DIM
A
MIN
MAX
0.069
0.010
0.019
0.010
MIN
1.35
0.10
0.35
0.19
MAX
1.75
0.25
0.49
0.25
0.053
0.004
0.014
0.007
N
A1
B
C
e
0.050 BSC
1.27 BSC
E
0.150
0.228
0.016
0.157
0.244
0.050
3.80
5.80
0.40
4.00
6.20
1.27
E
H
H
L
VARIATIONS:
INCHES
1
MILLIMETERS
DIM
D
MIN
MAX
0.197
0.344
0.394
MIN
4.80
8.55
9.80
MAX
5.00
N
8
MS012
AA
TOP VIEW
0.189
0.337
0.386
D
8.75 14
10.00 16
AB
D
AC
D
C
A
35/MAX876
B
0∞-8∞
e
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0041
B
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.
相关型号：
MAX873BESA+T
Three Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PDSO8, PLASTIC, SO-8
MAXIM
MAX8740ETB-T
Switching Regulator, Current-mode, 5.3A, 1600kHz Switching Freq-Max, BICMOS, PDSO10, 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEED-3, TDFN-10
MAXIM
©2020 ICPDF网 联系我们和版权申明