Maxim MAX6174BASA High-precision voltage references with temperature sensor Datasheet

19-3249; Rev 0; 5/04
High-Precision Voltage References with
Temperature Sensor
The MAX6173–MAX6177 are low-noise, high-precision
voltage references. The 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 ±0.06%
initial accuracy. The MAX6173–MAX6177 provide a
TEMP output where the output voltage is proportional to
the die temperature, making the devices suitable for a
wide variety of temperature-sensing applications. The
devices also provide a TRIM input, allowing fine trimming
of the output voltage with a resistive divider network. Low
temperature drift and low noise make the devices ideal
for use with high-resolution A/D or D/A converters.
The MAX6173–MAX6177 provide accurate preset +2.5V,
+3.3V, +4.096V, +5.0V, and +10V reference voltages and
accept input voltages up to +40V. The devices draw
320µA (typ) of supply current and source 30mA or sink
2mA of load current. The MAX6173–MAX6177 use
bandgap technology for low-noise performance and
excellent accuracy. The MAX6173–MAX6177 do not
require an output bypass capacitor for stability, and are
stable with capacitive loads up to 100µF. Eliminating the
output bypass capacitor saves valuable board area in
space-critical applications.
The MAX6173–MAX6177 are available in an 8-pin SO
package and operate over the automotive (-40°C to
+125°C) temperature range.
Features
♦ Wide (VOUT + 2V) to +40V Supply Voltage Range
♦ Excellent Temperature Stability: 3ppm/°C (max)
♦ Tight Initial Accuracy: 0.05% (max)
♦ Low Noise: 3.8µVP-P (typ at 2.5V Output)
♦ Sources up to 30mA Output Current
♦ Low Supply Current: 450µA (max at +25°C)
♦ Linear Temperature Transducer Voltage Output
♦ +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output
Voltages
♦ Wide Operating Temperature Range: -40°C to
+125°C
♦ No External Capacitors Required for Stability
♦ Short-Circuit Protected
Typical Operating Circuit
(VOUT + 2V) TO 40V INPUT
IN
*
Voltage Regulators
D/A Converters
Threshold Detectors
Digital Voltmeters
MAX6173–MAX6177
TEMP
*
TRIM
GND
Applications
A/D Converters
REFERENCE
OUTPUT
OUT
*OPTIONAL.
*
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
TEMP RANGE
PINPACKAGE
OUTPUT
VOLTAGE (V)
MAX6173AASA
-40°C to +125°C
8 SO
MAX6173BASA
-40°C to +125°C
8 SO
MAX6174AASA
-40°C to +125°C
8 SO
MAX6174BASA
-40°C to +125°C
MAX6175AASA
-40°C to +125°C
MAX6175BASA
-40°C to +125°C
MAX6176AASA
-40°C to +125°C
MAX6176BASA
-40°C to +125°C
MAX6177AASA
MAX6177BASA
PART
TEMPERATURE COEFFICIENT
(ppm/°C) -40°C TO +125°C
INITIAL
ACCURACY (%)
2.500
3
0.06
2.500
10
0.10
4.096
3
0.06
8 SO
4.096
10
0.10
8 SO
5.000
3
0.06
8 SO
5.000
10
0.10
8 SO
10.000
3
0.05
8 SO
10.000
10
0.10
-40°C to +125°C
8 SO
3.300
3
0.06
-40°C to +125°C
8 SO
3.300
10
0.10
________________________________________________________________ Maxim Integrated Products
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.
1
MAX6173–MAX6177
General Description
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +42V
OUT, TRIM, TEMP to GND...........................-0.3V to (VIN + 0.3V)
Output Short Circuit to GND .....................................................5s
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW
Operating Temperature Range ........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°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—MAX6173 (VOUT = 2.5V)
(VIN = +5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6173A (0.06%)
2.4985
2.5
2.5015
MAX6173B (0.1%)
2.4975
2.5
2.5025
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
Load Regulation (Note 3)
Output Short-Circuit
Current
∆VOUT / ∆VIN 4.5V ≤ VIN ≤ 40V
∆VOUT /
∆IOUT
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
V
%
MAX6173AASA
1.5
3
MAX6173BASA
3
10
ppm/°C
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
Sourcing:
0 ≤ IOUT ≤ 10mA
TA = +25°C
2
TA = -40°C to +125°C
2
15
Sinking:
-0.6mA ≤ IOUT ≤ 0
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
OUT shorted to GND
60
OUT shorted to IN
3
ppm/V
ppm/mA
mA
120
ppm
1000 hours at TA = +25°C
50
ppm
f = 0.1Hz to 10Hz
3.8
µVP-P
f = 10Hz to 1kHz
6.8
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
150
µs
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
INPUT
Supply Voltage Range
Quiescent Supply Current
VIN
IIN
Guaranteed by line regulation test
No load
TA = +25°C
4.5
40.0
300
TA = -40°C to +125°C
450
600
V
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
2
VTEMP
570
mV
TCTEMP
1.9
mV/°C
_______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
(VIN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6177A (0.06%)
3.2980
3.3
3.3020
MAX6177B (0.1%)
3.2967
3.3
3.3033
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT /
∆VIN
Load Regulation (Note 3)
∆VOUT /
∆IOUT
Output Short-Circuit Current
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
5.3V ≤ VIN ≤ 40V
V
%
MAX6177AASA
1.5
3
MAX6177BASA
3
10
ppm/°C
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
Sourcing:
0 ≤ IOUT ≤ 10mA
TA = +25°C
2
TA = -40°C to +125°C
2
15
Sinking:
-0.6mA ≤ IOUT ≤ 0
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
OUT shorted to GND
60
OUT shorted to IN
3
ppm/V
ppm/
mA
mA
120
ppm
50
ppm
5
µVP-P
f = 10Hz to 1kHz
9.3
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
180
µs
1000 hours at TA = +25°C
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
f = 0.1Hz to 10Hz
INPUT
Supply Voltage Range
Quiescent Supply Current
VIN
IIN
Guaranteed by line regulation test
No load
TA = +25°C
5.3
40.0
320
TA = -40°C to +125°C
500
650
V
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
630
mV
TCTEMP
2.1
mV/°C
_______________________________________________________________________________________
3
MAX6173–MAX6177
ELECTRICAL CHARACTERISTICS—MAX6177 (VOUT = 3.3V)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
ELECTRICAL CHARACTERISTICS—MAX6174 (VOUT = 4.096V)
(VIN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6174A (0.06%)
4.0935
4.096
4.0985
MAX6174B (0.1%)
4.0919
4.096
4.1001
UNITS
OUTPUT
Output Voltage
Output Adjustment Range
VOUT
∆VTRIM
No load, TA = +25°C
Output-Voltage Temperature
Coefficient (Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT/
∆VIN
6.1V ≤ VIN ≤ 40V
Load Regulation (Note 3)
∆VOUT/
∆IOUT
Output Short-Circuit Current
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
±3
RPOT = 10kΩ
±6
%
MAX6174AASA
1.5
3
MAX6174BASA
3
10
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
Sourcing:
0 ≤ IOUT ≤ 10mA
TA = +25°C
2
TA = -40°C to +125°C
2
15
Sinking:
-0.6mA ≤ IOUT ≤ 0
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
OUT shorted to GND
60
OUT shorted to IN
3
V
ppm/°C
ppm/V
ppm/mA
mA
120
ppm
1000 hours at TA = +25°C
50
ppm
f = 0.1Hz to 10Hz
7
µVP-P
f = 10Hz to 1kHz
11.5
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
200
µs
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
INPUT
Supply Voltage Range
Quiescent Supply Current
VIN
IIN
Guaranteed by line regulation test
No load
TA = +25°C
6.1
40.0
320
TA = -40°C to +125°C
500
650
V
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
4
VTEMP
630
mV
TCTEMP
2.1
mV/°C
_______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
(VIN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6175A (0.06%)
4.9970
5.0
5.0030
MAX6175B (0.1%)
4.9950
5.0
5.0050
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT /
∆VIN
Load Regulation (Note 3)
Output Short-Circuit Current
∆VOUT /
∆IOUT
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
7V ≤ VIN ≤ 40V
V
%
MAX6175AASA
1.5
3
MAX6175BASA
3
10
ppm/°C
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
2
10
Sourcing:
0 ≤ IOUT ≤ 10mA
TA = +25°C
TA = -40°C to +125°C
2
15
Sinking:
-0.6mA ≤ IOUT ≤ 0
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
OUT shorted to GND
60
OUT shorted to IN
3
1000 hours at TA = +25°C
ppm/V
ppm/mA
mA
120
ppm
50
ppm
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
f = 0.1Hz to 10Hz
9
µVP-P
f = 10Hz to 1kHz
14.5
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
230
µs
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load
TA = +25°C
7.0
40.0
320
TA = -40°C to +125°C
550
700
V
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
630
mV
TCTEMP
2.1
mV/°C
_______________________________________________________________________________________
5
MAX6173–MAX6177
ELECTRICAL CHARACTERISTICS—MAX6175 (VOUT = 5.0V)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
ELECTRICAL CHARACTERISTICS—MAX6176 (VOUT = 10V)
(VIN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT/
∆VIN
Load Regulation (Note 3)
Output Short-Circuit
Current
∆VOUT/
∆IOUT
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
12V ≤ VIN ≤ 40V
MAX6176A (0.05%)
9.9950
10.0
10.0050
MAX6176B (0.1%)
9.9900
10.0
10.0100
±3
±6
V
%
MAX6176AASA
1.5
3
MAX6176BASA
3
10
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
2
10
ppm/°C
Sourcing:
0 ≤ IOUT ≤ 10mA
TA = +25°C
TA = -40°C to +125°C
2
15
Sinking:
-0.6mA ≤ IOUT ≤ 0
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
OUT shorted to GND
60
OUT shorted to IN
3
ppm/V
ppm/mA
mA
120
ppm
1000 hours at TA = +25°C
50
ppm
f = 0.1Hz to 10Hz
18
µVP-P
f = 10Hz to 1kHz
29
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
400
µs
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load
TA = +25°C
12.0
40.0
340
TA = -40°C to +125°C
550
700
V
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
Note 1:
Note 2:
Note 3:
Note 4:
6
VTEMP
630
mV
TCTEMP
2.1
mV/°C
All devices are 100% production tested at TA = +25°C and guaranteed by design over TA = TMIN to TMAX, as specified.
Temperature coefficient is defined as ∆VOUT divided by the temperature range.
Line and load regulation specifications do not include the effects of self-heating.
Thermal hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMAX to TMIN.
_______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
10.001
OUTPUT VOLTAGE (V)
2.499
9.997
9.996
9.994
THREE TYPICAL PARTS
-25
0
25
50
75
100
125
TA = +25°C
0
-0.25
TA = +125°C
-50
-25
0
25
50
75
100
-0.50
125
0
5
10
15
20
25
TEMPERATURE (°C)
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)
TA = +125°C
0
-0.25
TA = -40°C
TA = +25°C
0.50
TA = +125°C
0.25
0
TA = -40°C
-0.25
-0.50
-0.50
0
5
10
15
20
25
0
30
0.5
1.0
1.5
30
MAX6173 toc06
0.75
2.0
OUTPUT VOLTAGE CHANGE (mV)
0.25
MAX6173 toc05
TA = +25°C
1.00
OUTPUT VOLTAGE CHANGE (mV)
MAX6173 toc04
0.50
1.5
TA = -40°C
1.0
TA = +125°C
0.5
0
TA = +25°C
-0.5
-1.0
2.0
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)
TA = -40°C
60
TA = +125°C
40
20
TA = +125°C
200
TA = -40°C
150
100
50
10
15
20
25
INPUT VOLTAGE (V)
30
35
40
2.0
TA = +125°C
1.5
TA = +25°C
1.0
TA = -40°C
TA = +25°C
0.5
0
5
MAX6173 toc09
250
TA = +25°C
0
2.5
MAX6173 toc08
80
300
OUTPUT VOLTAGE CHANGE (µV)
MAX6173 toc07
100
0
TA = -40°C
0.25
THREE TYPICAL PARTS
9.993
-50
OUTPUT VOLTAGE CHANGE (mV)
9.998
9.995
2.498
OUTPUT VOLTAGE CHANGE (µV)
9.999
DROPOUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.500
10.000
0.50
MAX6173 toc03
10.002
2.501
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 2.5V)
MAX6173 toc02
10.003
MAX6173 toc01
2.502
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 10V)
OUTPUT VOLTAGE CHANGE (mV)
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.5V)
12
16
20
24
28
32
INPUT VOLTAGE (V)
36
40
0
4
8
12
16
20
SOURCE CURRENT (mA)
_______________________________________________________________________________________
7
MAX6173–MAX6177
Typical Operating Characteristics
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 10V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
-40
PSRR (dB)
TA = +125°C
TA = +25°C
-40
-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
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)
1
0.1
0.01
0.001
300
TA = +25°C
250
TA = -40°C
200
150
0.1
1
10
100
250
TA = +25°C
200
TA = -40°C
150
100
50
50
1000
MAX6173 toc15
300
100
0
0.01
TA = +125°C
350
SUPPLY CURRENT (µA)
10
TA = +125°C
350
400
MAX6173 toc14
MAX6173 toc13
400
SUPPLY CURRENT (µA)
0
0
5
10
15
20
25
30
35
40
0
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)
350
300
275
700
TEMP VOLTAGE (mV)
SUPPLY CURRENT (µA)
325
325
300
250
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
600
500
275
250
800
40
MAX6173 toc18
375
MAX6173 toc16
350
MAX6173 toc17
OUTPUT IMPEDANCE (Ω)
0.01
SOURCE CURRENT (mA)
100
8
MAX6173 toc12
-20
PSRR (dB)
DROPOUT VOLTAGE (V)
0
MAX6173 toc11
-20
2.0
1.5
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 10V)
0
MAX6173 toc10
2.5
SUPPLY CURRENT (µA)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
400
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
-50
-25
0
25
50
75
TEMPERATURE (°C)
_______________________________________________________________________________________
100
125
High-Precision Voltage References with
Temperature Sensor
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
600
TWO TYPICAL PARTS
2.501
2.55
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
2.5
200
400
600
800
TRIM VOLTAGE (V)
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)
10.001
10.000
9.999
200
400
600
800
0.1
1000
1000
100
100
9.998
10,000
TIME (hours)
1
10
100
FREQUENCY (Hz)
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 2.5V)
1000
0.1
1
10
100
FREQUENCY (Hz)
1000
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 10V)
MAX6173 toc25
MAX6173 toc26
1µV/div
1s/div
1000
MAX6173 toc24
1000
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
TWO TYPICAL PARTS
MAX6173 toc23
MAX6173 toc22
10.002
0
0
TEMPERATURE (°C)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
-50
VOUT (V)
2.502
VOUT (V)
700
LONG-TERM STABILITY vs. TIME
(VOUT = 2.500V)
MAX6173 toc20
2.60
OUTPUT VOLTAGE (V)
800
TEMP VOLTAGE (mV)
2.65
MAX6173 toc19
900
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX6173 toc21
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 10V)
4µV/div
1s/div
_______________________________________________________________________________________
9
MAX6173–MAX6177
Typical Operating Characteristics (continued)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
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)
MAX6173 toc28
MAX6173 toc27
20mA
IOUT
20mA
IOUT
0
0
VOUT
AC-COUPLED
1V/div
VOUT
AC-COUPLED
1V/div
10µs/div
10µs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO 20mA)
MAX6173 toc29
MAX6173 toc30
20mA
20mA
IOUT
IOUT
0
0
VOUT
AC-COUPLED
50mV/div
VOUT
AC-COUPLED
100mV/div
200µs/div
100µs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO -2mA)
MAX6173 toc31
MAX6173 toc32
0
0
IOUT
40µs/div
10
IOUT
-2mA
-2mA
VOUT
AC-COUPLED
200mV/div
VOUT
AC-COUPLED
20mV/div
200µs/div
______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO -2mA)
MAX6173 toc33
MAX6173 toc34
0
0
IOUT
IOUT
-2mA
-2mA
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
5mV/div
400µs/div
400µs/div
LINE TRANSIENT
(VOUT = 2.5V)
LINE TRANSIENT
(VOUT = 10V)
MAX6173 toc35
MAX6173 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
10µs/div
2µs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 0)
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 1µF)
MAX6173 toc37
MAX6173 toc38
VIN
2V/div
VIN
2V/div
GND
GND
VOUT
1V/div
VOUT
1V/div
GND
COUT = 0
10µs/div
GND
40µs/div
______________________________________________________________________________________
11
MAX6173–MAX6177
Typical Operating Characteristics (continued)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
Typical Operating Characteristics (continued)
(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)
MAX6173 toc39
MAX6173 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 MAX6173–MAX6177 precision voltage references
provide accurate preset +2.5V, +3.3V, +4.096V, +5.0V,
and +10V reference voltages from up to +40V input voltages. These devices feature a proprietary temperaturecoefficient 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 MAX6173–MAX6177 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
MAX6173–MAX6177 by placing a resistive divider network between OUT, TRIM, and GND.
12
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.
______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
n =
VTEMP (at TJ = T0 )
≅ 1.9mV / °K
T0
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 MAX6173–MAX6177 consume 320µA (typ) of quiescent supply current. This improved efficiency
reduces power dissipation and extends battery life.
Thermal Hysteresis
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 MAX6173–MAX6177 do not require an output
capacitor for stability and are stable with capacitive
loads up to 100µF. In applications where the load or the
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 MAX6173–MAX6177 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 MAX6173–MAX6177 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
______________________________________________________________________________________
13
MAX6173–MAX6177
Temp Output
The MAX6173–MAX6177 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,
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
Temperature Coefficient vs. Operating
Temperature Range for a
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 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
*
REFERENCE
OUTPUT
MAX6173–MAX6177
TEMP
TRIM
MAX5436
50kΩ
POTENTIOMETER
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potrntiometer
Pin Configuration
Chip Information
TRANSISTOR COUNT: 429
PROCESS: BiCMOS
TOP VIEW
I.C.*
1
IN
2
TEMP
3
MAX6173–
MAX6177
GND 4
8
I.C.*
7
N.C.
6
OUT
5
TRIM
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
14
______________________________________________________________________________________
High-Precision Voltage References with
Temperature Sensor
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
DIM
A
A1
B
C
e
E
H
L
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
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 ____________________ 15
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX6173–MAX6177
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.)
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