MAXIM MAX6161, MAX6168 Technical data

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 volt­age options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V,

4.5V, and 5V. They feature a proprietary curvature-cor­rection 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 conven­tional shunt-mode (two-terminal) references that waste
supply current and require an external resistor, these
devices offer a supply current that is virtually indepen­dent of the supply voltage (8µA/V variation) and do not
require an external resistor. Additionally, the internally
compensated devices do not require an external com­pensation capacitor. Eliminating the external compen­sation 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-perfor­mance, low-voltage systems.

The MAX6161–MAX6168 are available in 8-pin SO
packages.

________________________Applications

Analog-to-Digital Converters (ADCs)

Portable Battery-Powered Systems

Notebook Computers

PDAs, GPS, DMMs

Cellular Phones

Precision +3V/+5V Systems

____________________________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

19-1650; Rev 3; 8/05

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

________________________________________________________________ Maxim Integrated Products 1

OUT

N.C.GND

1

2

87N.C.

N.C.IN

N.C.

N.C.

SO

TOP VIEW

3

4

6

5

MAX6161–
MAX6168

___________________Pin Configuration

*Insert the code for the desired initial accuracy and temperature

coefficient (from the Selector Guide) in the blank to complete
the part number.

Typical Operating Circuit and Selector Guide appear at end
of data sheet.

PART*

TEMP RANGE

PIN-

OUTPUT

VOLTAGE

(V)

MAX6161_ESA

8 SO 1.250

MAX6162_ESA

8 SO 2.048

MAX6163_ESA

8 SO 3.000

MAX6164_ESA

8 SO 4.096

MAX6165_ESA

8 SO 5.000

MAX6166_ESA

8 SO 2.500

MAX6167_ESA

8 SO 4.500

MAX6168_ESA

8 SO 1.800

Ordering Information

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.

PACKAGE

-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

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

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

ELECTRICAL CHARACTERISTICS—MAX6161 (V

OUT

= 1.25V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6161A

Output Voltage V

OUT

TA = +25°C

MAX6161B

V

MAX6161A 4 10

Output Voltage Temperature
Coefficient (Note 2)

MAX6161B 6 15

ppm/°C

Line Regulation

ΔV

IN

2.5V

<

VIN

<

12.6V 12

µV/V

Sourcing: 0

<

I

OUT

<

4mA 0.5 0.9

Load Regulation

Sinking: -2mA

<

I

OUT

<

0 1.3 2.5

mV/mA

Short to GND 110

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C 115

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

125

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 20

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 15

µV

RMS

Ripple Rejection

VIN = +5V ±100mV, f = 120Hz 80 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF 50 µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test 2.5

V

Quiescent Supply Current I

IN

125

µA

Change in Supply Current

µA/V

1.248 1.250 1.252

1.246 1.250 1.254

TCV

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔI

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

ΔIIN/ΔVIN2.5V < VIN < 12.6V 3.2 8.0

150

12.6

150

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX6168 (V

OUT

= 1.800V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6168A

Output Voltage V

OUT

TA = +25°C

MAX6168B

V

MAX6168A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6168B 4 10

ppm/°C

Line Regulation

ΔV

IN

2.5V ≤ VIN ≥ 12.6V 42

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.5 0.9

Load Regulation

Sinking: -2mA

<

I

OUT

<

0 1.5 4

mV/mA

Short to GND 110

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

125

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 22

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 25

µV

RMS

Ripple Rejection

ΔV

IN

VIN = +5V ±100mV, f = 120Hz 78 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF 100 µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test 2.5

V

Quiescent Supply Current I

IN

100

µA

Change in Supply Current

ΔIIN/ΔV

IN

2.5V

<

VIN

<

12.6V 3.4 8.0

µA/V

TCV

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔI

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

1.798 1.800 1.802

1.795 1.800 1.805

200

12.6

120

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX6162 (V

OUT

= 2.048V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

CONDITIONS

UNITS

MAX6162A

Output Voltage V

OUT

TA = +25°C

MAX6162B

V

MAX6162A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6162B 4 10

ppm/°C

Line Regulation

2.5V

<

V

IN

<

12.6V 42 250

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.5 0.9

Load Regulation

ΔI

OUT

Sinking: -2mA

<

I

OUT

<

0 1.5 4

mV/mA

Short to GND

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 22

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 25

µV

RM S

Ripple Rejection

VIN = 5V ±100mV, f = 120Hz 78 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF

µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test 2.5

V

Quiescent Supply Current I

IN

120 µA

Change in Supply Current

µA/V

SYMBOL

TCV

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

ΔIIN/ΔVIN2.5V < V

IN

MIN TYP MAX

2.046 2.048 2.050

2.043 2.048 2.053

110

125

100

12.6

100

< 12.6V 3.4 8.0

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—MAX6166 (V

OUT

= 2.500V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6166A

Output Voltage V

OUT

TA = +25°C

MAX6166B

V

MAX6166A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6166B 4 10

ppm/°C

Dropout Voltage (Note 4)

I

OUT

= 1mA 50

mV

Line Regulation

ΔV

IN

V

OUT

+ 0.2V

<

V

IN

<

12.6V 60

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.5 0.9

Load Regulation

Sinking: -2mA

<

I

OUT

<

0 1.6 5

mV/mA

Short to GND 110

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

125

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 27

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 30

µV

RMS

Ripple Rejection

VIN = 5V ±100mV, f = 120Hz 76 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF 115 µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test

V

Quiescent Supply Current I

IN

100

µA

Change in Supply Current

V

OUT

+ 0.2V

<

VIN

<

12.6V 3.2 8.0

µA/V

TCV

OUT

VIN - V

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔI

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

2.498 2.500 2.502

2.495 2.500 2.505

200

250

V

+ 0.2 12.6

OUT

ΔIIN/ΔV

IN

120

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX6163 (V

OUT

= 3.000V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6163A

Output Voltage V

OUT

TA = +25°C

MAX6163B

V

MAX6163A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6163B 4 10

ppm/°C

Dropout Voltage (Note 4)

I

OUT

= 1mA 50 200 mV

Line Regulation

ΔV

IN

V

OUT

+ 0.2V

<

VIN

<

12.6V 83 300

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.5 0.9

Load Regulation

ΔI

OUT Sinking: -2mA

<

I

OUT

<

0 1.8 5

mV/mA

Short to GND

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 35

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 40

µV

RMS

Ripple Rejection

VIN = 5V ±100mV, f = 120Hz 76 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF

µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test V

OUT

+ 0.2

V

Quiescent Supply Current I

IN

120 µA

Change in Supply Current

V

OUT

+ 0.2V

<

VIN

<

12.6V 3.2 8.0

µA/V

TCV

OUT

VIN - V

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

2.998 3.000 3.002

2.995 3.000 3.005

110

125

115

ΔIIN/ΔV

IN

12.6

100

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

_______________________________________________________________________________________ 7

ELECTRICAL CHARACTERISTICS—MAX6164 (V

OUT

= 4.096V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6164A

Output Voltage V

OUT

TA = +25°C

MAX6164B

V

MAX6164A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6164B 4 10

ppm/°C

Dropout Voltage (Note 4)

I

OUT

= 1mA 50 200 mV

Line Regulation

ΔV

IN

V

OUT

+ 0.2V

<

V

IN

<

12.6V

300

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.6 0.9

Load Regulation

Sinking: -2mA

<

I

OUT

<

0 2.0 7.0

mV/mA

Short to GND

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 50

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 50

µV

RMS

Ripple Rejection

VIN = 5V ±100mV, f = 120Hz 72 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF

µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test V

OUT

+ 0.2

V

Quiescent Supply Current I

IN

120 µA

Change in Supply Current

V

OUT

+ 0.2V

<

VIN

<

12.6V 3.2 8.0

µA/V

TCV

OUT

VIN - V

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔI

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

4.094 4.096 4.098

4.091 4.096 4.101

140

110

125

190

ΔIIN/ΔV

IN

100

12.6

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

8 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX6167 (V

OUT

= 4.500V)

(VIN= +5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6167A

Output Voltage V

OUT

TA = +25°C

MAX6167B

V

MAX6167A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6167B 4 10

Dropout Voltage (Note 4)

I

OUT

= 1mA 50

mV

Line Regulation

ΔV

IN

V

OUT

+ 0.2V

<

VIN

<

12.6V

Sourcing: 0

<

I

OUT

<

5mA 0.6 0.9

Load Regulation

Sinking: -2mA

<

I

OUT

<

0 2.3 8.0

Short to GND

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

Output Voltage Hysteresis
(Note 3)

cycle

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 55

Noise Voltage e

OUT

f = 10Hz to 10kHz 55

Ripple Rejection

VIN = 5V ±100mV, f = 120Hz 70 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF

µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test V

OUT

+ 0.2

V

Quiescent Supply Current I

IN

µA

Change in Supply Current

V

OUT

+ 0.2V

<

VIN

<

12.6V 3.1 8.0

TCV

OUT

VIN - V

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔI

OUT

ΔV

/

OUT

Δ

V

OUT/

V

OUT/VIN

4.498 4.500 4.502

4.495 4.500 4.505

200

160 450 µV/V

110

125 ppm

230

ppm/°C

mV/mA

ppm/

1000hr

µVp-p

µV

RMS

12.6

µA/V

ΔIIN/ΔV

IN

100 120

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

_______________________________________________________________________________________ 9

ELECTRICAL CHARACTERISTICS—MAX6165 (V

OUT

= 5.000V)

(VIN= +5.5V, I

OUT

= 0, TA= T

MIN

to T

MAX

, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX6165A

Output Voltage V

OUT

TA = +25°C

MAX6165B

V

MAX6165A 2 5

Output Voltage Temperature
Coefficient (Note 2)

MAX6165B 4 10

ppm/°C

Dropout Voltage (Note 4)

I

OUT

= 1mA 50

mV

Line Regulation

V

OUT

+ 0.2V

<

VIN

<

12.6V

µV/V

Sourcing: 0

<

I

OUT

<

5mA 0.6 0.9

Load Regulation

ΔI

OUT Sinking: -2mA

<

I

OUT

<

0 2.4 8.0

mV/mA

Short to GND

OUT Short-Circuit Current I

SC

Short to IN 25

mA

Long-Term Stability

time

1000hr at +25°C80

ppm/

1000hr

Output Voltage Hysteresis
(Note 3)

cycle

ppm

DYNAMIC CHARACTERISTICS

f = 0.1Hz to 10Hz 60

µVp-p

Noise Voltage e

OUT

f = 10Hz to 10kHz 60

µV

RMS

Ripple Rejection

VIN = 5.5V ±100mV, f = 120Hz 65 dB

Turn-On Settling Time t

R

V

OUT

to 0.1% of final value, C

OUT

= 50pF

µs

INPUT CHARACTERISTICS

Supply Voltage Range V

IN

Guaranteed by line-regulation test V

OUT

+ 0.2

V

Quiescent Supply Current I

IN

µA

Change in Supply Current

V

OUT

+ 0.2V

<

VIN

<

12.6V 3.1 8.0

µA/V

Note 1: 100% production tested at TA= +25°C. Guaranteed by design for TA= -40°C to +85°C.
Note 2: Temperature Coefficient is specified by the “box” method; i.e., the maximum ΔV

OUT

is divided by the maximum ΔT.

Note 3: Thermal Hysteresis is defined as the change in T

A

= +25°C output voltage before and after temperature cycling of the

device (from T

A

= T

MIN

to T

MAX

). Initial measurement at TA= +25°C is followed by temperature cycling the device to
TA= +85°C then to TA= -40°C, and another measurement at TA= +25°C is compared to the original measurement at
TA= +25°C.

Note 4: Dropout voltage is the minimum input voltage at which V

OUT

changes ≤ 0.2% from V

OUT

at VIN= 5.0V (VIN= 5.5V for

MAX6165).

TCV

OUT

VIN - V

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

ΔV

/

OUT

V

OUT/VIN

4.998 5.000 5.002

4.995 5.000 5.005

200

180 400

110

125

300

ΔIIN/ΔV

IN

100 120

12.6

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

10 ______________________________________________________________________________________

Typical Operating Characteristics

(VIN= +5V for MAX6161–MAX6168, VIN= +5.5V for MAX6165, I

OUT

= 0, TA= +25°C, unless otherwise noted.) (Note 5)

MAX6161

OUTPUT VOLTAGE TEMPERATURE DRIFT

MAX6161/68 toc01

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

705525 40-10 0 10-25

1.2496

1.2497

1.2498

1.2499

1.2500

1.2501

1.2502

1.2503

1.2504

1.2505

1.2495

-40 85

3 TYPICAL PARTS

MAX6165

OUTPUT VOLTAGE TEMPERATURE DRIFT

MAX6161/68 toc02

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

7055-25 -10 0 2510 40

4.9985

4.9990

4.9995

5.0000

5.0005

5.0010

5.0015

5.0020

4.9980

-40 85

3 TYPICAL PARTS

MAX6161

LONG-TERM DRIFT

MAX6161/68 toc03

TIME (hrs)

DRIFT (ppm)

768

192

384

576

-30

-20

-10

0

10

20

30

40

50

60

-40
0 960

MAX6165

LONG-TERM DRIFT

MAX6161/68 toc04

TIME (hrs)

DRIFT (ppm)

768

192

384

576

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-100
0960

-300

-200

-100

0

100

200

300

2 4 6 8 10 12

MAX6161

LINE REGULATION

MAX6161/68 toc05

INPUT VOLTAGE (V)

OUTPUT VOLTAGE CHANGE (μV)

TA = +85°C

TA = +25°C

TA = -40°C

-1200

-600

-800

-1000

-400

-200

0

200

5971113

MAX6165

LINE REGULATION

MAX6161/68 toc06

INPUT VOLTAGE (V)

OUTPUT VOLTAGE CHANGE (μV)

TA = +85°C

TA = +25°C

TA = -40°C

-3

1

0

-1

-2

2

3

4

5

-4 -2 0 2 4

MAX6161/68 toc07

LOAD CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

TA = +25°C

TA = -40°C

MAX6161

LOAD REGULATION

TA = +85°C

-6

2

0

-2

-4

4

8

6

10

12

-6 -2-4 0246

MAX6161/68 toc08

LOAD CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

MAX6165

LOAD REGULATION

TA = +25°C

TA = +85°C

TA = -40°C

0

0.10

0.05

0.20

0.15

0.25

0.30

021345

MAX6166
DROPOUT VOLTAGE
vs. LOAD CURRENT

MAX6161/68 toc09

LOAD CURRENT (mA)

DROPOUT VOLTAGE (V)

TA = +85°C

TA = +25°C

TA = -40°C

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

______________________________________________________________________________________ 11

Typical Operating Characteristics (continued)

(VIN= +5V for MAX6161–MAX6168, VIN= +5.5V for MAX6165, I

OUT

= 0, TA= +25°C, unless otherwise noted.) (Note 5)

0

0.05

0.15

0.10

0.20

0.25

021345

TA = +85°C

TA = +25°C

TA = -40°C

MAX6161/68 toc10

LOAD CURRENT (mA)

DROPOUT VOLTAGE (V)

MAX6165

DROPOUT VOLTAGE

vs. LOAD CURRENT

MAX6161/68 toc11

FREQUENCY (kHz)

PSRR (dB)

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

0.001 1 10 1000.01 0.1 1000

MAX6161

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

-70

-80

0.001 10 1000

-60

-50

-40

-30

-20

-10

0

FREQUENCY (kHz)

PSRR (dB)

0.1

MAX6165

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX6161/68 toc12

MAX6161

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX6161/68 toc13

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

1210864

108

116

124

132

140

148

156

164

172

180

100

214

TA = +85°C

TA = +25°C

TA = -40°C

MAX6165

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX6161/68 toc14

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

131210 117 8 96

96

102

108

114

120

126

132

138

144

150

90

514

TA = +85°C

TA = +25°C

TA = -40°C

MAX6161

SUPPLY CURRENT vs. TEMPERATURE

MAX6161/68 toc15

TEMPERATURE (°C)

SUPPLY CURRENT (μA)

603510-15

108

116

124

132

140

148

156

164

172

180

100

-40 85

VCC = +12.6V

VCC = +5V

VCC = +2.5V

MAX6165

SUPPLY CURRENT vs. TEMPERATURE

MAX6161/68 toc16

TEMPERATURE (°C)

SUPPLY CURRENT (μA)

603510-15

96

102

108

114

120

126

132

138

144

150

90

-40 85

VCC = +12.6V

VCC = +5.2V

0

0.001 10 1000

40

20

60

80

100

140

120

160

180

200

220

MAX6161/68 toc17

FREQUENCY (kHz)

OUTPUT IMPEDANCE (Ω)

0.1

MAX6161

OUTPUT IMPEDANCE

vs. FREQUENCY

180

0

0.001 10 1000

40

20

60

100

80

120

140

160

MAX6161/68 toc18

FREQUENCY (kHz)

OUTPUT IMPEDANCE (Ω)

0.1

MAX6165

OUTPUT IMPEDANCE

vs. FREQUENCY

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN= +5V for MAX6161–MAX6168, VIN= +5.5V for MAX6165, I

OUT

= 0, TA= +25°C, unless otherwise noted.) (Note 5)

V

OUT

10μV/div

1s/div

MAX6161

0.1Hz TO 10Hz OUTPUT NOISE

MAX6161/68 toc19

V

OUT

10μV/div

1s/div

MAX6165

NOISE

MAX6161/68 toc20

V

OUT

500mV/div

V

IN

5V/div

10μs/div

MAX6161

TURN-ON TRANSIENT

(C

L

= 50pF)

MAX6161/68 toc21

V

OUT

2V/div

V

IN

5V/div

40μs/div

MAX6165

TURN-ON TRANSIENT

(C

L

= 50pF)

MAX6161/67 toc22

I

OUT

500μA/div

V

OUT

AC-COUPLED

100mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(I

OUT

= ±250μA, V

IN

= 5.0, CL = 0)

+250μA

-250μA

MAX6161/68 toc23

I

OUT

500μA/div

V

OUT

AC-COUPLED

50mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(I

OUT

= ±250μA, CL = 0, V

IN

= 5.5V)

+250μA

-250μA

MAX6161/68 toc24

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

______________________________________________________________________________________ 13

I

OUT

5mA/div

V

OUT

AC-COUPLED

50mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(C

L

= 0, I

OUT

= ±2mA, V

IN

= 5.5V)

+2mA

-2mA

MAX6161/68 toc28

I

OUT

5mA/div

V

OUT

AC-COUPLED

100mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(V

IN

= 5.0V, CL = 0, I

OUT

= ±2mA)

+2mA

-2mA

MAX6161/68 toc27

I

OUT

5mA/div

V

OUT

AC-COUPLED

50mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(V

IN

= 5.0V, CL = 1μF, I

OUT

= ±2mA)

+2mA

-2mA

MAX6161/68 toc29

I

OUT

5mA/div

V

OUT

AC-COUPLED

20mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(C

L

= 1μF, I

OUT

= ±2mA, V

IN

= 5.5V)

+2mA

-2mA

MAX6161/68 toc30

I

OUT

500μA/div

V

OUT

AC-COUPLED

10mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(I

OUT

= ±250μA, V

IN

= 5.0V, CL = 1μF)

+250μA

-250μA

MAX6161/68 toc25

I

OUT

500μA/div

V

OUT

AC-COUPLED

20mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(I

OUT

= ±250μA, CL = 1μF, V

IN

= 5.5V)

+250μA

-250μA

MAX6161/68 toc26

Typical Operating Characteristics (continued)

(VIN= +5V for MAX6161–MAX6168, VIN= +5.5V for MAX6165, I

OUT

= 0, TA= +25°C, unless otherwise noted.) (Note 5)

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

14 ______________________________________________________________________________________

I

OUT

5mA/div

V

OUT

AC-COUPLED

50mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(V

IN

= 5.0V, CL = 1μF, I

OUT

= ±4mA)

+4mA

-4mA

MAX6161/68 toc33

I

OUT

5mA/div

V

OUT

AC-COUPLED

50mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(I

OUT

= ±5mA, CL = 1μF, V

IN

= 5.5V)

+5mA

-5mA

MAX6161/68 toc34

V

IN

500mV/div

V

OUT

AC-COUPLED

20mV/div

40μs/div

MAX6161

LINE TRANSIENT

(C

L

= 0)

+0.25V

-0.25V

MAX6161/68 toc35

V

IN

500mV/div

V

OUT

AC-COUPLED

20mV/div

40μs/div

MAX6165

LINE TRANSIENT

(C

L

= 0)

+0.25V

-0.25V

MAX6161/68 toc36

Note 5: Many of the Typical Operating Characteristics of the MAX6161 family are extremely similar. The extremes of these characteristics

are found in the MAX6161 (1.25V output) and the MAX6165 (5.0V output). The Typical Operating Characteristics of the remain­der of the MAX6161 family typically lie between these two extremes and can be estimated based on their output voltages.

Typical Operating Characteristics (continued)

(VIN= +5V for MAX6161–MAX6168, VIN= +5.5V for MAX6165, I

OUT

= 0, TA= +25°C, unless otherwise noted.) (Note 5)

I

OUT

5mA/div

V

OUT

AC-COUPLED

200mV/div

400μs/div

MAX6161

LOAD TRANSIENT

(V

IN

= 5.0V, CL = 0, I

OUT

= ±4mA)

+4mA

-4mA

MAX6161/68 toc31

I

OUT

5mA/div

V

OUT

AC-COUPLED

100mV/div

400μs/div

MAX6165

LOAD TRANSIENT

(I

OUT

= ±5mA, CL = 0, V

IN

= 5.5V)

+5mA

-5mA

MAX6161/68 toc32

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 Voltage References

______________________________________________________________________________________ 15

Applications Information

Input Bypassing

For the best line-transient performance, decouple the
input with a 0.1µF ceramic capacitor as shown in the
Typical Operating Circuit. Locate the capacitor as
close to IN as possible. When transient performance is
less important, no capacitor is necessary.

Output/Load Capacitance

Devices in the MAX6161 family do not require an output
capacitor for frequency stability. In applications where
the load or the supply can experience step changes,
an output capacitor of at least 0.1µF will reduce the
amount of overshoot (undershoot) and improve the cir­cuit’s transient response. Many applications do not
require an external capacitor, and the MAX6161 family
can offer a significant advantage in applications when
board space is critical.

Supply Current

The quiescent supply current of the series-mode
MAX6161 family is typically 100µA and is virtually inde­pendent of the supply voltage, with only an 8µA/V
(max) variation with supply voltage. Unlike series refer­ences, shunt-mode 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 voltage. Additionally, shunt-mode references
have to be biased at the maximum expected load cur­rent, even if the load current is not present at the time.
In the MAX6161 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 reduces power dissi­pation and extends battery life.

When the supply voltage is below the minimum speci­fied input voltage (as during turn-on), the devices can
draw up to 400µA 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 input
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 125ppm.

Turn-On Time

These devices typically turn on and settle to within

0.1% of their final value in 50µs to 300µs, depending on
the output voltage (see electrical table of part used).
The turn-on time can increase up to 1.5ms with the
device operating at the minimum dropout voltage and
the maximum load.

IN

+SUPPLY INPUT (SEE SELECTOR GUIDE)

OUT REFERENCE

OUT

1μF*

*CAPACITORS ARE OPTIONAL.

GND

MAX6161–
MAX6168

0.1μF*

Typical Operating Circuit

__________________________Chip Information

TRANSISTOR COUNT: 117

PROCESS: BiCMOS

Pin Description

PIN NAME FUNCTION

No Connection. Not internally connected.N.C.1, 3, 5, 7, 8

2 IN Input Voltage

GroundGND4

6 OUT Reference Output

MAX6161–MAX6168

Precision, Micropower, Low-Dropout, High­Output-Current, SO-8 Voltage References

16 ______________________________________________________________________________________

Selector Guide

PART

OUTPUT VOLTAGE

(V)

INITIAL ACCURACY

(mV)

TEMPERATURE

COEFFICIENT

(ppm/°C)

MAX6161A 1.250 ±210

MAX6161B 1.250 ±415

MAX6168A 1.800 ±25

MAX6168B 1.800 ±510
MAX6162A 2.048 ±25

MAX6162B 2.048 ±510

MAX6166A 2.500 ±25

MAX6166B 2.500 ±510

MAX6163A 3.000 ±25

MAX6163B 3.000 ±510

MAX6164A 4.096 ±25

MAX6164B 4.096 ±510

MAX6167A 4.500 ±25

MAX6167B

4.500

±510

MAX6165A 5.000 ±25

MAX6165B

5.000

±510

MAX6161–MAX6168

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 _____________________17

© 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

SOICN .EPS

PACKAGE OUTLINE, .150" SOIC

1

1

21-0041

B

REV.DOCUMENT CONTROL NO.APPROVAL

PROPRIETARY INFORMATION

TITLE:

TOP VIEW

FRONT VIEW

MAX

0.010

0.069

0.019

0.157

0.010

INCHES

0.150

0.007

E

C

DIM

0.014

0.004

B

A1

MIN

0.053A

0.19

3.80 4.00

0.25

MILLIMETERS

0.10

0.35

1.35

MIN

0.49

0.25

MAX

1.75

0.050

0.016L

0.40 1.27

0.3940.386D

D

MINDIM

D

INCHES

MAX

9.80 10.00

MILLIMETERS

MIN

MAX

16

AC

0.337 0.344 AB8.758.55 14

0.189 0.197 AA5.004.80 8

N MS012

N

SIDE VIEW

H 0.2440.228 5.80 6.20

e 0.050 BSC 1.27 BSC

C

HE

e

B

A1

A

D

0∞-8∞

L

1

VARIATIONS:

Precision, Micropower, Low-Dropout, High-

Output-Current, SO-8 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.maxim-ic.com/packages

.)