19-1650; Rev 3; 8/05
Precision, Micropower, Low-Dropout, High-
Output-Current, SO-8 Voltage References
General Description
The MAX6161–MAX6168 are precision, low-dropout,
micropower voltage references. These three-terminal
devices operate with an input voltage range from (V
OUT
+ 200mV) to 12.6V and are available with output volt-
age options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V,
4.5V, and 5V. They feature a proprietary curvature-cor-
rection circuit and laser-trimmed thin-film resistors that
result in a very low temperature coefficient of 5ppm/°C
(max) and an initial accuracy of ±2mV (max).
Specifications apply to the extended temperature range
(-40°C to +85°C).
The MAX6161–MAX6168 typically draw only 100µA of
supply current and can source 5mA (4mA for
MAX6161) or sink 2mA of load current. Unlike conven-
tional shunt-mode (two-terminal) references that waste
supply current and require an external resistor, these
devices offer a supply current that is virtually indepen-
dent of the supply voltage (8µA/V variation) and do not
require an external resistor. Additionally, the internally
compensated devices do not require an external com-
pensation capacitor. Eliminating the external compen-
sation capacitor saves valuable board area in
space-critical applications. A low-dropout voltage and
a supply-independent, ultra-low supply current make
these devices ideal for battery-operated, high-perfor-
mance, low-voltage systems.
The MAX6161–MAX6168 are available in 8-pin SO
packages.
____________________________Features
♦
±2mV (max) Initial Accuracy
♦
5ppm/°C (max) Temperature Coefficient
♦
5mA Source Current at 0.9mV/mA
♦
2mA Sink Current at 2.5mV/mA
♦
Stable with 1µF Capacitive Loads
♦
No External Capacitor Required
♦
100µA (typ) Quiescent Supply Current
♦
200mV (max) Dropout at 1mA Load Current
♦
Output Voltage Options: 1.25V, 1.8V, 2.048V, 2.5V,
3V, 4.096V, 4.5V, 5V
MAX6161–MAX6168
Ordering Information
PART*
MAX6161_ESA
MAX6162_ESA
MAX6163_ESA
MAX6164_ESA
MAX6165_ESA
MAX6166_ESA
MAX6167_ESA
MAX6168_ESA
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
OUTPUT
VOLTAGE
(V)
1.250
2.048
3.000
4.096
5.000
2.500
4.500
1.800
________________________Applications
Analog-to-Digital Converters (ADCs)
Portable Battery-Powered Systems
Notebook Computers
PDAs, GPS, DMMs
Cellular Phones
Precision +3V/+5V Systems
*Insert
the code for the desired initial accuracy and temperature
coefficient (from the Selector Guide) in the blank to complete
the part number.
___________________Pin Configuration
TOP VIEW
N.C.
IN
N.C.
1
2
3
8
7
N.C.
N.C.
OUT
N.C.
MAX6161–
MAX6168
6
5
GND
4
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
SO
________________________________________________________________
Maxim Integrated Products
1
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.
Precision, Micropower, Low-Dropout, High-
Output-Current, SO-8 Voltage References
MAX6161–MAX6168
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
IN …………............................................................-0.3 to +13.5V
OUT……………… ........................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration to GND or IN (V
IN
≤
6V) ...Continuous
Output Short-Circuit Duration to GND or IN (V
IN
> 6V)…...........60s
Continuous Power Dissipation (T
A
= +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—MAX6161 (V
OUT
= 1.25V)
(V
IN
= +5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient (Note 2)
Line Regulation
Load Regulation
OUT Short-Circuit Current
Long-Term Stability
Output Voltage Hysteresis
(Note 3)
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Supply Current
Change in Supply Current
V
IN
I
IN
ΔI
IN
/ΔV
IN
2.5V < V
IN
< 12.6V
Guaranteed by line-regulation test
2.5
125
3.2
12.6
150
8.0
V
µA
µA/V
e
OUT
V
OUT
/V
IN
t
R
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
V
IN
= +5V
±100mV,
f = 120Hz
V
OUT
to 0.1% of final value, C
OUT
= 50pF
20
15
80
50
µVp-p
µV
RMS
dB
µs
SYMBOL
V
OUT
TCV
OUT
ΔV
OUT
/
ΔV
IN
ΔV
OUT
/
ΔI
OUT
I
SC
ΔV
OUT
/
time
ΔV
OUT
/
cycle
T
A
= +25°C
MAX6161A
MAX6161B
2.5V < V
IN
< 12.6V
Sourcing: 0 < I
OUT
< 4mA
Sinking: -2mA < I
OUT
< 0
Short to GND
Short to IN
1000hr at +25°C
CONDITIONS
MAX6161A
MAX6161B
MIN
1.248
1.246
TYP
1.250
1.250
4
6
12
0.5
1.3
110
25
115
125
MAX
1.252
1.254
10
15
150
0.9
2.5
UNITS
V
ppm/°C
µV/V
mV/mA
mA
ppm/
1000hr
ppm
2
_______________________________________________________________________________________
Precision, Micropower, Low-Dropout, High-
Output-Current, SO-8 Voltage References
ELECTRICAL CHARACTERISTICS—MAX6168 (V
OUT
= 1.800V)
(V
IN
= +5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient (Note 2)
Line Regulation
Load Regulation
OUT Short-Circuit Current
Long-Term Stability
Output Voltage Hysteresis
(Note 3)
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Supply Current
Change in Supply Current
V
IN
I
IN
ΔI
IN
/ΔV
IN
2.5V < V
IN
< 12.6V
Guaranteed by line-regulation test
2.5
100
3.4
12.6
120
8.0
V
µA
µA/V
e
OUT
ΔV
OUT
/
ΔV
IN
t
R
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
V
IN
= +5V
±100mV,
f = 120Hz
V
OUT
to 0.1% of final value, C
OUT
= 50pF
22
25
78
100
µVp-p
µV
RMS
dB
µs
SYMBOL
V
OUT
TCV
OUT
ΔV
OUT
/
ΔV
IN
ΔV
OUT
/
ΔI
OUT
I
SC
ΔV
OUT
/
time
ΔV
OUT
/
cycle
T
A
= +25°C
MAX6168A
MAX6168B
2.5V
≤
V
IN
≥
12.6V
Sourcing: 0 < I
OUT
< 5mA
Sinking: -2mA < I
OUT
< 0
Short to GND
Short to IN
1000hr at +25°C
CONDITIONS
MAX6168A
MAX6168B
MIN
1.798
1.795
TYP
1.800
1.800
2
4
42
0.5
1.5
110
25
80
125
MAX
1.802
1.805
5
10
200
0.9
4
UNITS
V
ppm/°C
µV/V
mV/mA
mA
ppm/
1000hr
ppm
MAX6161–MAX6168
_______________________________________________________________________________________
3
Precision, Micropower, Low-Dropout, High-
Output-Current, SO-8 Voltage References
MAX6161–MAX6168
ELECTRICAL CHARACTERISTICS—MAX6162 (V
OUT
= 2.048V)
(V
IN
= +5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient (Note 2)
Line Regulation
Load Regulation
OUT Short-Circuit Current
Long-Term Stability
Output Voltage Hysteresis
(Note 3)
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Supply Current
Change in Supply Current
V
IN
I
IN
ΔI
IN
/ΔV
IN
Guaranteed by line-regulation test
2.5V < V
IN
< 12.6V
2.5
100
3.4
12.6
120
8.0
V
µA
µA/V
e
OUT
V
OUT
/V
IN
t
R
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
V
IN
= 5V
±100mV,
f = 120Hz
V
OUT
to 0.1% of final value, C
OUT
= 50pF
22
25
78
100
µVp-p
µV
RMS
dB
µs
SYMBOL
V
OUT
TCV
OUT
ΔV
OUT
/
ΔV
OUT
/
ΔI
OUT
I
SC
ΔV
OUT
/
time
ΔV
OUT
/
cycle
T
A
= +25°C
MAX6162A
MAX6162B
2.5V < V
IN
< 12.6V
Sourcing: 0 < I
OUT
< 5mA
Sinking: -2mA < I
OUT
< 0
Short to GND
Short to IN
1000hr at +25°C
CONDITIONS
MAX6162A
MAX6162B
MIN
2.046
2.043
TYP
2.048
2.048
2
4
42
0.5
1.5
110
25
80
125
MAX
2.050
2.053
5
10
250
0.9
4
UNITS
V
ppm/°C
µV/V
mV/mA
mA
ppm/
1000hr
ppm
4
_______________________________________________________________________________________
Precision, Micropower, Low-Dropout, High-
Output-Current, SO-8 Voltage References
ELECTRICAL CHARACTERISTICS—MAX6166 (V
OUT
= 2.500V)
(V
IN
= +5V, I
OUT
= 0, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient (Note 2)
Dropout Voltage (Note 4)
Line Regulation
Load Regulation
OUT Short-Circuit Current
Long-Term Stability
Output Voltage Hysteresis
(Note 3)
DYNAMIC CHARACTERISTICS
Noise Voltage
Ripple Rejection
Turn-On Settling Time
INPUT CHARACTERISTICS
Supply Voltage Range
Quiescent Supply Current
Change in Supply Current
V
IN
I
IN
ΔI
IN
/ΔV
IN
V
OUT
+ 0.2V < V
IN
< 12.6V
Guaranteed by line-regulation test
V
OUT
+ 0.2
100
3.2
12.6
120
8.0
V
µA
µA/V
e
OUT
V
OUT
/V
IN
t
R
f = 0.1Hz to 10Hz
f = 10Hz to 10kHz
V
IN
= 5V
±100mV,
f = 120Hz
V
OUT
to 0.1% of final value, C
OUT
= 50pF
27
30
76
115
µVp-p
µV
RMS
dB
µs
SYMBOL
V
OUT
TCV
OUT
T
A
= +25°C
MAX6166A
MAX6166B
CONDITIONS
MAX6166A
MAX6166B
MIN
2.498
2.495
TYP
2.500
2.500
2
4
50
60
0.5
1.6
110
25
80
125
MAX
2.502
2.505
5
10
200
250
0.9
5
UNITS
V
ppm/°C
mV
µV/V
mV/mA
mA
ppm/
1000hr
ppm
MAX6161–MAX6168
V
IN
- V
OUT
I
OUT
= 1mA
ΔV
OUT
/
ΔV
IN
ΔV
OUT
/
ΔI
OUT
I
SC
ΔV
OUT
/
time
ΔV
OUT
/
cycle
V
OUT
+ 0.2V < V
IN
< 12.6V
Sourcing: 0 < I
OUT
< 5mA
Sinking: -2mA < I
OUT
< 0
Short to GND
Short to IN
1000hr at +25°C
_______________________________________________________________________________________
5
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