19-5708; Rev 0; 12/10
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
General Description
The MAX44264 is an ultra-small (6-bump WLP) op amp
that draws only 750nA of supply current. It operates
from a single +1.8V to +5.5V supply and features
ground-sensing inputs and rail-to-rail output. The ultra-
low supply current, low-operating voltage, and rail-to-
rail output capabilities make these operational
amplifiers ideal for use in single lithium ion (Li+), or two-
cell NiCd or alkaline battery systems. The rail-to-rail out-
put stage of the MAX44264 is capable of driving the
output voltage to within 4mV of the rail with a 100kΩ
load, and can sink and source 11mA with a +5V sup-
ply. The IC is unity-gain stable and available in a
space-saving 0.9mm x 1.3mm, 6-bump WLP package.
Features
♦
Ultra-Low 750nA Supply Current per Amplifier
♦
Ultra-Low +1.8V Supply Voltage Operation
♦
Ground-Sensing Input Common-Mode Range
♦
Outputs Swing Rail-to-Rail
♦
Outputs Source and Sink 11mA of Load Current
♦
No Phase Reversal for Overdriven Inputs
♦
High 120dB Open-Loop Voltage Gain
♦
Low 500µV Input Offset Voltage
♦
9kHz Gain-Bandwidth Product
♦
250pF (min) Capacitive Load Capability
♦
Available in a Tiny, 0.9mm x 1.3mm, 6-Bump WLP
Package
MAX44264
Applications
Cell Phones
Tablet/Notebook Computers
Mobile Accessories
Battery-Powered Devices
Ordering Information
PART
MAX44264EWT+
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
6 WLP
TOP
MARK
+CB
+Denotes
a lead(Pb)-free/RoHS-compliant package.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
MAX44264
ABSOLUTE MAXIMUM RATINGS
V
DD
to V
SS
...............................................................-0.3V to +6V
IN_+ or IN_-......................................(V
SS
- 0.3V) to (V
DD
+ 0.3V)
OUT_ Shorted to V
SS
or V
DD
......................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Bump WLP (derate 10.5mW/°C above +70°C) .............840mW
Operating Temperature Range ......................... -40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°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
(V
DD
= +5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/2, R
L
=
∞
to V
DD
/2,
T
A
= +25°C,
unless otherwise noted.)
PARAMETER
Supply Voltage Range
Supply Current (per
Amplifier)
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Common-Mode
Voltage Range
Common-Mode Rejection
Ratio
Power-Supply Rejection
Ratio
Large-Signal Voltage Gain
SYMBOL
V
DD
I
DD
V
OS
I
B
I
OS
V
CM
CMRR
PSRR
Guaranteed by the CMRR test
Specified with V
SS
≤
V
CM
≤
(V
DD
- 1.1V)
+1.8V
≤
V
DD
≤
+5.5V
R
L
= 1MΩ, V
OUT
= 50mV to V
DD
- 50mV
A
VOL
R
L
= 100kΩ, V
OUT
= 200mV to V
DD
- 200mV
R
L
= 10kΩ, V
OUT
= 200mV to V
DD
- 200mV
V
OH
Output Voltage Swing
V
OL
Gain-Bandwidth Product
Phase Margin
GBW
φ
M
Swing low
specified as
V
OL
- V
SS
Swing high
specified as
V
DD
- V
OH
R
L
= 1MΩ
R
L
= 100kΩ
R
L
= 10kΩ
R
L
= 1MΩ
R
L
= 100kΩ
R
L
= 10kΩ
V
SS
70
70
90
90
95
90
120
112
100
1
4
40
0.5
1
10
9
90
kHz
degrees
5
5
4
10
mV
dB
V
DD
= +1.8V
V
DD
= +5.0V
CONDITIONS
Guaranteed by PSRR tests
MIN
1.8
0.6
0.75
±0.5
±200
±12.5
V
DD
-
1.1
1.2
±7.0
±1500
TYP
MAX
5.5
UNITS
V
µA
mV
pA
pA
V
dB
dB
2
_______________________________________________________________________________________
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/2, R
L
=
∞
to V
DD
/2,
T
A
= +25°C,
unless otherwise noted.)
PARAMETER
Slew Rate
Input Voltage Noise
Output Short-Circuit
Current
Power-On Time
Power-Off Time
Capacitive Load
t
ON
t
OFF
C
LOAD
No sustained oscillations
250
SYMBOL
SR
e
n
V
OUT
= 4V step
f = 1kHz
f = 10kHz
Shorted to V
SS
(sourcing)
Shorted to V
DD
(sinking)
CONDITIONS
MIN
TYP
2
150
120
11
36
2
2
MAX
UNITS
V/ms
nV/√Hz
mA
µs
µs
pF
MAX44264
ELECTRICAL CHARACTERISTICS
(V
DD
= +5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/2, R
L
=
∞
to V
DD
/2,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage Range
Supply Current (per
Amplifier)
Input Offset Voltage
Input Offset Voltage
Temperature Coefficient
Input Bias Current
Input Common-Mode
Voltage Range
Common-Mode Rejection
Ratio
Power-Supply Rejection
Ratio
Large-Signal Voltage Gain
SYMBOL
V
DD
I
DD
V
OS
TCV
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OH
Output Voltage Swing
V
OL
Guaranteed by the CMRR test
V
SS
≤
V
CM
≤
(V
DD
- 1.1V)
+1.8V
≤
V
DD
≤
+5.5V, 0
o
C
≤
T
A
≤
+85
o
C
+2V
≤
V
DD
≤
+5.5V, -40 C
≤
T
A
≤
+85 C
V
OUT
= 50mV to V
DD
- 50mV, R
L
= 1MΩ
V
OUT
= 200mV to V
DD
- 200mV, R
L
= 100kΩ
Swing high specified
as V
DD
- V
OH
Swing low specified as
V
OL
- V
SS
R
L
= 1MΩ
R
L
= 100kΩ
R
L
= 1MΩ
R
L
= 100kΩ
o
o
CONDITIONS
Guaranteed by PSRR tests
V
DD
= +5.0V
MIN
1.8
TYP
MAX
5.5
1.5
±15
UNITS
V
µA
mV
µV/°C
8
4.25
V
SS
56
65
65
75
75
5
15
5
5
V
DD
-
1.1
nA
V
dB
dB
dB
mV
Note 1:
All devices are production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
_______________________________________________________________________________________
3
Ultra-Low Power Op Amp in
a Tiny 6-Bump WLP
MAX44264
Typical Operating Characteristics
(V
DD
= +5V, V
SS
= 0V, V
CM
= 0V, R
L
= 100kΩ to V
DD
/2, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
MAX44264 toc01
SUPPLY CURRENT vs.
TEMPERATURE
MAX44264 toc02
OFFSET VOLTAGE vs.
TEMPERATURE
0.45
0.40
OFFSET VOLTAGE (mV)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
MAX44264 toc03
0.9
0.8
SUPPLY CURRENT (µA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.9
0.8
SUPPLY CURRENT (µA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.50
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX44264 toc04
INPUT BIAS CURRENT vs.
TEMPERATURE
MAX44264 toc05
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE
-10
INPUT BIAS CURRENT (pA)
-20
-30
-40
-50
-60
-70
-80
-90
MAX44264 toc06
0.50
0.45
0.40
OFFSET VOLTAGE (mV)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
-50
INPUT BIAS CURRENT (pA)
-100
-150
-200
-250
-300
-350
-400
0
4.0
-50
-25
0
25
50
75
100
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
COMMON-MODE VOLTAGE (V)
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
POWER-SUPPLY REJECTION RATIO vs.
FREQUENCY
-10
-20
-30
PSRR (dB)
-40
-50
-60
-70
-80
-90
-100
10
100
1k
10k
FREQUENCY (Hz)
V
OL
- V
SS
(mV)
1.0
0.8
0.6
0.4
0.2
0
-50
MAX44264 toc07
OUTPUT VOLTAGE SWING LOW vs.
TEMPERATURE
1.4
R
L
= 100kΩ
1.2
V
DD
- V
OH
(mV)
4
3
2
1
0
-25
0
25
50
75
100
-50
MAX44264 toc08
OUTPUT VOLTAGE SWING HIGH vs.
TEMPERATURE
MAX44264 toc09
0
1.6
6
5
R
L
= 100kΩ
R
L
= 1MΩ
R
L
= 1MΩ
-25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Single/Dual/Quad, +1.8V/750nA, SC70,
Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
DD
= +5V, V
SS
= 0V, V
CM
= 0V, R
L
= 100kΩ to V
DD
/2, T
A
= +25°C, unless otherwise noted.)
COMMON-MODE REJECTION RATIO vs.
TEMPERATURE
MAX44264 toc10
MAX44264
MINIMUM SUPPLY VOLTAGE
vs. TEMPERATURE
MAX44264 toc11
A
VOL
vs. OUTPUT VOLTAGE SWING
130
120
A
VOL
(dB)
110
100
90
80
70
60
2.5
3.0
3.5
4.0
4.5
5.0
R
L
= 10kΩ
R
L
= 1MΩ
R
L
= 100kΩ
MAX44264 toc12
-20
-30
-40
-50
CMRR (dB)
-60
-70
-80
-90
-100
-110
-120
-50
-25
0
25
50
75
1.4
MINIMUM SUPPLY VOLTAGE (V)
1.2
1.0
0.8
0.6
0.4
0.2
0
140
100
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE (Vp-p)
GAIN AND PHASE vs. FREQUENCY
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
1
10
MAX44264 toc13
GAIN AND PHASE vs. FREQUENCY
180
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
1
MAX44264 toc14
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX44264 toc15
180
135
10.00
C
L
= 12pF
R
L
= 1MΩ 135
A
VCL
= 1000V/V
GAIN
90
PHASE (deg)
45
0
-45
-90
-135
100k
GAIN (dB)
GAIN
90
PHASE (deg)
45
0
THD + N (%)
1.00
GAIN (dB)
PHASE
PHASE
R
L
= 1MΩ
A
VCL
= 1000V/V
C
L
= 250pF
10
100
1k
10k
-45
-90
-135
100k
0.10
0.01
10
100
1k
10k
FREQUENCY (Hz)
100
1k
10k
FREQUENCY (Hz)
VOLTAGE NOISE DENSITY vs.
FREQUENCY
MAX44264 toc16
STABILITY vs. CAPACITIVE
AND RESISTIVE LOADS
MAX44264 toc17
I
OUT
vs. V
OUT
36
32
28
I
SINK
MAX44264 toc18
10k
100k
40
CAPACITIVE LOAD (pF)
NOISE (nV/√Hz)
1k
10k
UNSTABLE
REGION
1k
I
OUT
(mA)
24
20
16
12
8
4
I
SOURCE
100
10
10
100
1k
FREQUENCY (Hz)
10k
100k
100
10k
100k
RESISTIVE LOAD (Ω)
1M
0
0
1
2
V
OUT
(V)
3
4
5
_______________________________________________________________________________________
5
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