Maxim MAX6193BESA Precision, micropower, low-dropout voltage reference Datasheet

19-1408; Rev 2; 10/01
Precision, Micropower,
Low-Dropout Voltage References
Selector Guide
PART
MAX6190A
MAX6190B
OUTPUT
VOLTAGE
(V)
INITIAL
ACCURACY
(mV)
TEMPERATURE
COEFFICIENT
(ppm/°C)
1.250
±2
<5
1.250
±4
Features
♦ ±2mV (max) Initial Accuracy
♦ 5ppm/°C (max) Temperature Coefficient
♦ 35µA (max) Supply Current
♦ 100mV Dropout at 500µA Load Current
♦ 0.12µV/µA Load Regulation
♦ 8µV/V Line Regulation
Applications
Hand-Held Instruments
Analog-to-Digital and Digital-to-Analog Converters
Industrial Process Control
Precision 3V/5V Systems
Hard-Disk Drives
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX6190AESA
-40°C to +85°C
8 SO
<10
MAX6190BESA
-40°C to +85°C
8 SO
-40°C to +85°C
8 SO
MAX6190C
1.250
±6
<25
MAX6190CESA
MAX6191A
2.048
±2
<5
MAX6191AESA
-40°C to +85°C
8 SO
<10
MAX6191BESA
-40°C to +85°C
8 SO
<25
MAX6191CESA
-40°C to +85°C
8 SO
-40°C to +85°C
8 SO
MAX6191B
MAX6191C
2.048
2.048
±5
±10
MAX6192A
2.500
±2
<5
MAX6192AESA
MAX6192B
2.500
±5
<10
MAX6192BESA
-40°C to +85°C
8 SO
MAX6192CESA
-40°C to +85°C
8 SO
MAX6192C
2.500
±10
<25
MAX6193A
3.000
±2
<5
MAX6193B
3.000
±5
<10
MAX6193C
3.000
±10
<25
MAX6198A
4.096
±2
<5
MAX6198B
4.096
±5
<10
MAX6198C
4.096
±10
<25
MAX6194A
4.500
±2
<5
MAX6194B
4.500
±5
<10
N.C.
1
MAX6194C
4.500
±10
<25
IN
2
MAX6195A
5.000
±2
<5
MAX6195B
5.000
±5
<10
N.C.
3
MAX6195C
5.000
±10
<25
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
MAX6190–
MAX6195
MAX6198
GND 4
8
N.C.
7
N.C.
6
OUT
5
N.C.
Typical Operating Circuit appears at end of data sheet.
SO
________________________________________________________________ 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
MAX6190–MAX6195/MAX6198
General Description
The MAX6190–MAX6195/MAX6198 precision, micropower, low-dropout voltage references offer high initial
accuracy and very low temperature coefficient through
a proprietary curvature-correction circuit and lasertrimmed precision thin-film resistors.
These series-mode bandgap references draw a maximum of only 35µA quiescent supply current, making
them ideal for battery-powered instruments. They offer
a supply current that is virtually immune to input voltage variations. Load-regulation specifications are
guaranteed for source and sink currents up to 500µA.
These devices are internally compensated, making
them ideal for applications that require fast settling,
and are stable with capacitive loads up to 2.2nF.
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
IN ......................................................................-0.3V to +13.5V
OUT ..........................................................-0.3V to (VIN + 0.3V)
Output Short Circuit to GND or IN (VIN < 6V) ............Continuous
Output Short Circuit to GND or IN (VIN ≥ 6V) .........................60s
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
Operating Temperature Range ...........................-40°C to +85°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—MAX6190
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6190A
1.248
1.250
1.252
MAX6190B
1.246
1.250
1.254
MAX6190C
1.244
1.250
1.256
UNITS
OUTPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 1)
VOUT
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Short-Circuit Current
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
TA = +25°C
MAX6190A
2
5
MAX6190B
4
10
MAX6190C
8
25
2.5V ≤ VIN ≤ 12.6V
8
80
Sourcing: 0 ≤ IOUT ≤ 500µA
0.12
0.5
Sinking: -500µA ≤ IOUT ≤ 0
Short to GND
Short to IN
0.15
4
4
0.6
V
ppm/°C
µV/V
µV/µA
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
25
µVP-P
10Hz to 10kHz
65
µVRMS
VIN = 5V ±100mV, f = 120Hz
86
dB
To 0.1%, COUT = 50pF
30
DYNAMIC
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
eOUT
VOUT/VIN
tR
COUT
(Note 3)
0
µs
2.2
nF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
2
Guaranteed by line-regulation test
2.5V ≤ VIN ≤ 12.6V
2.5
12.6
V
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6191A
2.046
2.048
2.050
MAX6191B
2.043
2.048
2.053
MAX6191C
2.038
2.048
2.058
UNITS
OUTPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 1)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Short-Circuit Current
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
TA = +25°C
MAX6191A
2
5
MAX6191B
4
10
MAX6191C
8
25
2.5V ≤ VIN ≤ 12.6V
10
100
Sourcing: 0 ≤ IOUT ≤ 500µA
0.12
0.55
Sinking: -500µA ≤ IOUT ≤ 0
Short to GND
Short to IN
0.18
4
4
0.70
V
ppm/°C
µV/V
µV/µA
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
40
µVP-P
10Hz to 10kHz
105
µVRMS
VIN = 5V ±100mV, f = 120Hz
84
dB
To 0.1%, COUT = 50pF
30
µs
DYNAMIC
Noise Voltage
eOUT
Ripple Rejection
VOUT/VIN
Turn-On Settling Time
Capacitive-Load Stability Range
tR
COUT
(Note 3)
0
2.2
nF
2.5
12.6
V
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
2.5V ≤ VIN ≤ 12.6V
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
3
MAX6190–MAX6195/MAX6198
ELECTRICAL CHARACTERISTICS—MAX6191
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
ELECTRICAL CHARACTERISTICS—MAX6192
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6192A
2.498
2.500
2.502
MAX6192B
2.495
2.500
2.505
MAX6192C
2.490
2.500
2.510
MAX6192A
2
5
MAX6192B
4
10
MAX6192C
8
25
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
15
140
Sourcing: 0 ≤ IOUT ≤ 500µA
0.14
0.60
Sinking: -500µA ≤ IOUT ≤ 0
0.18
0.80
100
200
UNITS
OUTPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 1)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 4)
Short-Circuit Current
TA = +25°C
VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Short to GND
Short to IN
V
ppm/°C
µV/V
µV/µA
mV
4
4
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
60
µVP-P
10Hz to 10kHz
125
µVRMS
VIN = 5V ±100mV, f = 120Hz
82
dB
To 0.1%, COUT = 50pF
85
µs
DYNAMIC
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
eOUT
VOUT/VIN
tR
COUT
(Note 3)
0
2.2
nF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
4
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
VOUT + 0.2
12.6
V
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6193A
2.998
3.000
3.002
MAX6193B
2.995
3.000
3.005
MAX6193C
2.990
3.000
3.010
MAX6193A
2
5
MAX6193B
4
10
UNITS
OUTPUT
Output Voltage
VOUT
TA = +25°C
Output-Voltage Temperature
Coefficient (Note 1)
TCVOUT
MAX6193C
8
25
Line Regulation
∆VOUT/
∆VIN
2.5V ≤ VIN ≤ 12.6V
20
150
Load Regulation
∆VOUT/
∆VIN
2.5V ≤ VIN ≤ 12.6V
0.14
0.60
0.18
0.80
100
200
Dropout Voltage (Note 4)
Short-Circuit Current
VIN - VOUT IOUT = 500µA
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Short to GND
Short to IN
V
ppm/°C
µV/V
µV/V
mV
4
4
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
75
µVP-P
10Hz to 10kHz
150
µVRMS
VIN = 5V ±100mV, f = 120Hz
80
dB
To 0.1%, COUT = 50pF
100
DYNAMIC
Noise Voltage
eOUT
Ripple Rejection
VOUT/VIN
Turn-On Settling Time
Capacitive-Load Stability Range
tR
COUT
(Note 3)
0
µs
2.2
nF
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
VOUT + 0.2
12.6
V
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
5
MAX6190–MAX6195/MAX6198
ELECTRICAL CHARACTERISTICS—MAX6193
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
ELECTRICAL CHARACTERISTICS—MAX6194
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 1)
VOUT
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 4)
Short-Circuit Current
TA = +25°C
MAX6194A
4.498
4.500
4.502
MAX6194B
4.495
4.500
4.505
MAX6194C
4.490
4.500
4.510
MAX6194A
2
5
MAX6194B
4
10
MAX6194C
8
25
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
25
160
Sourcing: 0 ≤ IOUT ≤ 500µA
0.16
0.80
Sinking: -500µA ≤ IOUT ≤ 0
0.22
1.00
100
200
VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Short to GND
Short to IN
V
ppm/°C
µV/V
µV/µA
mV
4
4
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
110
µVP-P
10Hz to 10kHz
215
µVRMS
VIN = 5V ±100mV, f = 120Hz
76
dB
DYNAMIC
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
eOUT
VOUT/VIN
tR
COUT
To 0.1%, COUT = 50pF
(Note 3)
180
0
µs
2.2
nF
OUTPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
6
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
VOUT + 0.2
12.6
V
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
(VIN = 5.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6195A
4.998
5.000
5.002
MAX6195B
4.995
5.000
5.005
MAX6195C
4.990
5.000
5.010
MAX6195A
2
5
MAX6195B
4
10
MAX6195C
8
25
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
25
160
Sourcing: 0 ≤ IOUT ≤ 500µA
0.17
0.85
Sinking: -500µA ≤ IOUT ≤ 0
0.24
1.10
100
200
UNITS
OUTPUT
INPUT
Output Voltage
VOUT
Output-Voltage Temperature
Coefficient (Note 1)
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 4)
Short-Circuit Current
TA = +25°C
VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Short to GND
Short to IN
V
ppm/°C
µV/V
µV/µA
mA
4
4
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
120
µVP-P
10Hz to 10kHz
240
µVRMS
VIN = 5.5V ±100mV, f = 120Hz
72
dB
To 0.1%, COUT = 50pF
220
µs
DYNAMIC
Noise Voltage
eOUT
Ripple Rejection
VOUT/VIN
Turn-On Settling Time
Capacitive-Load Stability Range
tR
COUT
(Note 3)
0
2.2
nF
12.6
V
OUTPUT
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
VOUT + 0.2
27
35
µA
0.8
2
µA/V
_______________________________________________________________________________________
7
MAX6190–MAX6195/MAX6198
ELECTRICAL CHARACTERISTICS—MAX6195
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
ELECTRICAL CHARACTERISTICS—MAX6198
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
Output Voltage
Output-Voltage Temperature
Coefficient (Note 1)
VOUT
TCVOUT
Line Regulation
∆VOUT/
∆VIN
Load Regulation
∆VOUT/
∆IOUT
Dropout Voltage (Note 4)
Short-Circuit Current
MAX6198A
4.094
4.096
4.098
MAX6198B
4.091
4.096
4.101
MAX6198C
4.086
4.096
4.106
MAX6198A
2
5
MAX6198B
4
10
MAX6198C
8
25
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
25
160
Sourcing: 0 ≤ IOUT ≤ 500µA
0.15
0.70
Sinking: -500µA ≤ IOUT ≤ 0
0.20
0.90
100
200
TA = +25°C
VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA
ISC
Temperature Hysteresis
(Note 2)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Short to GND
Short to IN
V
ppm/°C
µV/V
µV/µA
mV
4
4
mA
75
ppm
1000hrs at +25°C
50
ppm/
1000hrs
0.1Hz to 10Hz
100
µVP-P
10Hz to 10kHz
200
µVRMS
VIN = 5V ±100mV, f = 120Hz
77
dB
To 0.1%, COUT = 50pF
160
µs
DYNAMIC
DYNAMIC
Noise Voltage
Ripple Rejection
Turn-On Settling Time
Capacitive-Load Stability Range
eOUT
VOUT/VIN
tR
COUT
(Note 3)
0
2.2
nF
INPUT
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Change in Supply Current
IIN/VIN
Note 1:
Note 2:
Note 3:
Note 4:
8
Guaranteed by line-regulation test
(VOUT + 0.2V) ≤ VIN ≤ 12.6V
VOUT + 0.2
12.6
V
27
35
µA
0.8
2
µA/V
Temperature Coefficient is measured by the “box” method; i.e., the maximum ∆VOUT is divided by the maximum ∆t.
Thermal Hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMIN to TMAX.
Not production tested. Guaranteed by design.
Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6195).
_______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
MAX6195
OUTPUT VOLTAGE
TEMPERATURE DRIFT
1.2500
5.0020
5.0015
5.0010
THREE
TYPICAL PARTS
1.2494
-40
-20
0
20
40
60
80
100
200
TA = -40°C
100
0
TA = +25°C
4.996
5.0000
4.994
4.9995
-40
4.993
-20
0
20
40
60
80
100
0 100 200 300 400 500 600 700 800 900 1000
TEMPERATURE DRIFT (°C)
TIME (HOURS)
MAX6195
LINE REGULATION
MAX6192/MAX6193
DROPOUT VOLTAGE
vs. SOURCE CURRENT
800
OUTPUT VOLTAGE CHANGE (µV)
MAX6190 toc04
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
4.997
4.995
MAX6190
LINE REGULATION
300
4.998
5.0005
TEMPERATURE DRIFT (°C)
400
4.999
TA = +85°C
600
TA = -40°C
400
200
0.8
0.7
DROPOUT VOLTAGE (V)
1.2496
5.000
MAX6190 toc05
1.2498
5.001
TA = +25°C
MAX6190 toc06
1.2502
VOUT (V)
VOUT (V)
5.0025
THREE
TYPICAL PARTS
5.002
OUTPUT VOLTAGE (V)
5.0030
1.2504
5.003
0.6
0.5
TA = -40°C
0.4
TA = +85°C
0.3
0.2
0
0.1
-100
-200
6
8
10
12
5
7
9
11
13
0
200
400
600
800
INPUT VOLTAGE (V)
SOURCE CURRENT (µA)
MAX6190
LOAD REGULATION
MAX6195
LOAD REGULATION
MAX6194/MAX6195/MAX6198
DROPOUT VOLTAGE
vs. SOURCE CURRENT
0.2
TA = -40°C
0
TA = +85°C
TA = +25°C
-0.2
0.4
0.2
TA = -40°C
0
-0.2
0.30
TA = +25°C
TA = -40°C
0.25
DROPOUT VOLTAGE (V)
MAX6190 toc07
0.4
OUTPUT VOLTAGE CHANGE (mV)
14
INPUT VOLTAGE (V)
MAX6012 toc08
4
OUTPUT VOLTAGE CHANGE (mV)
2
TA = +25°C
0
1000
MAX6190 toc09
1.2506
THREE
TYPICAL PARTS
5.0035
MAX6190 toc02
5.0040
MAX6190 toc01
1.2508
MAX6195
LONG-TERM DRIFT
MAX6190 toc03
MAX6190
OUTPUT VOLTAGE
TEMPERATURE DRIFT
TA = +85°C
0.20
0.15
0.10
TA = +25°C
0.05
TA = +85°C
-0.4
-500 -375 -250 -125
0
125 250 375 500
LOAD CURRENT (µA)
-0.4
-500 -375 -250 -125
0
0
125 250 375 500
LOAD CURRENT (µA)
0
200
400
600
800
1000
SOURCE CURRENT (µA)
_______________________________________________________________________________________
9
MAX6190–MAX6195/MAX6198
Typical Operating Characteristics
(VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5)
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5)
1
1
0.1
0.1
0.01
0.01
40
VALID OVER SPECIFIED
VIN (MIN) TO VIN (MAX)
FOR EACH PART
38
36
SUPPLY CURRENT (µA)
VCC = 5.5V ±0.25V
10
PSR (mV/V)
PSR (mV/V)
10
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX16190 toc11
100
MAX6190 toc10
100
MAX6195
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX6190 toc12
MAX6190
POWER-SUPPLY REJECTION
vs. FREQUENCY
34
32
30
28
26
24
22
1k
10k
100k
1M
20
10
10M
100
1k
10k
100k
1M
2
10M
4
6
8
10
FREQUENCY (Hz)
FREQUENCY (Hz)
INPUT VOLTAGE (V)
MAX6190
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6195
OUTPUT IMPEDANCE
vs. FREQUENCY
SUPPLY CURRENT
vs. TEMPERATURE
10
1
40
100
SUPPLY CURRENT (µA)
OUTPUT IMPEDANCE (Ω)
100
10
12
14
MAX6190 toc15
1k
MAX6190 toc13
1k
MAX6190 toc14
100
OUTPUT IMPEDANCE (Ω)
35
VIN = 12.5V
VIN = 7.5V
30
VIN = 5.5V
25
1
VIN = 2.5V (MAX6190/MAX6191 ONLY)
20
0.1
0.1
0.01 0.1
1
10
100
1k
0.01 0.1
10k 100k 1M
1
10
100
1k
-40
10k 100k 1M
-20
0
20
40
TEMPERATURE (°C)
MAX6190
0.1Hz TO 10Hz OUTPUT NOISE
MAX6195
0.1Hz TO 10Hz OUTPUT NOISE
MAX6190
TURN-ON TRANSIENT
MAX6190 toc17
VIN
1V/div
VOUT
20µV/div
VOUT
1V/div
1s/div
1s/div
80
100
MAX6190 toc18
FREQUENCY (Hz)
VOUT
10µV/div
10
60
FREQUENCY (Hz)
MAX6190 toc16
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
10µs/div
______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
MAX6195
TURN-ON TRANSIENT
MAX6195
LOAD-TRANSIENT RESPONSE
MAX6190
LOAD-TRANSIENT RESPONSE
IOUT
40µA/div
IOUT
50µA/div
-25µA
VOUT
50mV/div
VOUT
20mV/div
VIN
2V/div
VOUT
2V/div
10µs/div
20µs/div
10µs/div
IOUT = ±25µA, AC-COUPLED
MAX6190 toc21
+25µA
MAX6190 toc20
MAX6190 toc19
VIN = 5.5V, IOUT = ±25µA, AC-COUPLED
+500µA
IOUT
-500µA 00µA/div
MAX6190 toc24
MAX6190 toc23
MAX6190 toc22
IOUT
1mA/div
MAX6190
LINE-TRANSIENT RESPONSE
MAX6195
LOAD-TRANSIENT RESPONSE
MAX6190
LOAD-TRANSIENT RESPONSE
VIN
200mV/div
VOUT
00mV/div
VOUT
0.2V/div
VOUT
100mV/div
20µs/div
10µs/div
VIN = 5.5V, IOUT = ±500µA, AC-COUPLED
IOUT = ±500µA, AC-COUPLED
2.5µs/div
VIN = 5V ±0.25V, AC-COUPLED
MAX6190 toc25
MAX6195
LINE-TRANSIENT RESPONSE
VIN
200mV/div
VOUT
100mV/div
2µs/div
VIN = 5.5V ±0.25V, AC-COUPLED
Note 5: Many of the Typical Operating Characteristics of the MAX6190 family are
extremely similar. The extremes of these characteristics are found in the
MAX6190 (1.2V output) and the MAX6195 (5.0V output) devices. The Typical
Operating Characteristics of the remainder of the MAX6190 family typically lie
between these two extremes and can be estimated based on their output
voltage.
______________________________________________________________________________________
11
MAX6190–MAX6195/MAX6198
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5)
MAX6190–MAX6195/MAX6198
Precision, Micropower,
Low-Dropout Voltage References
Pin Description
PIN
NAME
FUNCTION
1, 3, 5, 7,
8
N.C.
2
IN
4
GND
Ground
6
OUT
Reference Voltage Output
No Connection. Not internally
connected.
Supply Voltage Input
Detailed Description
The MAX6190–MAX6195/MAX6198 precision bandgap
references use a proprietary curvature-correction circuit
and laser-trimmed thin-film resistors, resulting in a low
temperature coefficient of <5ppm/°C and initial accuracy of better than 0.1%. These devices can sink and
source up to 500µA with <200mV of dropout voltage,
making them attractive for use in low-voltage applications.
Applications Information
Output/Load Capacitance
Devices in this family do not require an output capacitance for frequency stability. They are stable for capacitive loads from 0 to 2.2nF. However, in applications
where the load or the supply can experience step
changes, an output capacitor will reduce the amount of
overshoot (or undershoot) and assist the circuit’s transient response. Many applications do not need an
external capacitor, and this family can offer a significant advantage in these applications when board
space is critical.
Supply Current
The quiescent supply current of these series-mode references is a maximum of 35µA and is virtually independent of the supply voltage, with only a 0.8µA/V variation
with supply voltage. Unlike series references, shuntmode references operate with a series resistor connected to the power supply. The quiescent current of a
shunt-mode reference is thus a function of the input
12
voltage. Additionally, shunt-mode references have to
be biased at the maximum expected load current, even
if the load current is not present all the time. In the
series-mode MAX6190 family, the load current is drawn
from the input voltage only when required, so supply
current is not wasted and efficiency is maximized at all
input voltages. This improved efficiency can help
reduce power dissipation and extend battery life.
When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can
draw up to 200µA beyond the nominal supply current.
The input voltage source must be capable of providing
this current to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage 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 temperature hysteresis value is 75ppm.
Turn-On Time
These devices typically turn on and settle to within
0.1% of their final value in 30µs to 220µs, depending on
the device. The turn-on time can increase up to 1.5ms
with the device operating at the minimum dropout voltage and the maximum load.
Positive and Negative Low-Power
Voltage Reference
Figure 1 shows a typical method for developing a bipolar reference. The circuit uses a MAX681 voltage doubler/inverter charge-pump converter to power an
ICL7652, thus creating a positive as well as a negative
reference voltage.
______________________________________________________________________________________
Precision, Micropower,
Low-Dropout Voltage References
VCC
2VS
V+
IN
MAX681
GND
+REF OUTPUT
OUT
V-
MAX6190–
MAX6195
MAX6198
1MΩ, 0.1%
V+
OUTPUT
GND
ICL7652
V1MΩ, 0.1%
10nF
-REF OUTPUT
-2VS
Figure 1. Positive and Negative References from Single 3V or 5V Supply
Ordering Information (continued)
TEMP RANGE
PIN-PACKAGE
MAX6193AESA
PART
-40°C to +85°C
8 SO
MAX6193BESA
-40°C to +85°C
8 SO
MAX6193CESA
-40°C to +85°C
8 SO
MAX6194AESA
-40°C to +85°C
8 SO
MAX6194BESA
-40°C to +85°C
8 SO
MAX6194CESA
-40°C to +85°C
8 SO
MAX6195AESA
-40°C to +85°C
8 SO
MAX6195BESA
-40°C to +85°C
8 SO
MAX6195CESA
-40°C to +85°C
8 SO
MAX6198AESA
-40°C to +85°C
8 SO
MAX6198BESA
-40°C to +85°C
8 SO
MAX6198CESA
-40°C to +85°C
8 SO
Typical Operating Circuit
+SUPPLY INPUT (SEE SELECTOR GUIDE ON FIRST PAGE)
IN
OUT
*
REFERENCE
OUT
MAX6190–
MAX6195
MAX6198
GND
2.2nF MAX*
*CAPACITORS ARE OPTIONAL
Chip Information
TRANSISTOR COUNT: 70
______________________________________________________________________________________
13
MAX6190–MAX6195/MAX6198
VS
Precision, Micropower,
Low-Dropout Voltage References
SOICN.EPS
MAX6190–MAX6195/MAX6198
Package Information
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.