19-3407; Rev 1; 10/05
1MHz, 20µA, Rail-to-Rail
I/O Op Amps with Shutdown
General Description
The single MAX9914/MAX9915 and dual MAX9916/
MAX9917 operational amplifiers feature maximized ratio
of gain bandwidth to supply current and are ideal for
battery-powered applications such as portable instru-
mentation, portable medical equipment, and wireless
handsets. These CMOS op amps feature an ultra-low
1pA input bias current, rail-to-rail inputs and outputs,
low 20µA supply current, and operate from a single
1.8V to 5.5V supply. For additional power conservation,
the MAX9915/MAX9917 feature a low-power shutdown
mode that reduces supply current to 1nA, and puts the
amplifier outputs in a high-impedance state. These
devices are unity-gain stable with a 1MHz gain-band-
width product.
The MAX9914 and MAX9915 are available in 5-pin and
6-pin SC70 packages, respectively. The MAX9916 is
available in an 8-pin SOT23 package, and the
MAX9917 in a 10-pin µMAX® package. All devices are
specified over the -40°C to +85°C extended operating
temperature range.
♦
High 1MHz GBW
♦
Ultra-Low 20µA Supply Current
♦
Single 1.8V to 5.5V Supply Voltage Range
♦
Ultra-Low 1pA Input Bias Current
♦
Rail-to-Rail Input and Output Voltage Ranges
♦
Low ±200µV Input Offset Voltage
♦
Low 0.001µA Shutdown Current
♦
High-Impedance Output During Shutdown
(MAX9915/MAX9917)
♦
Unity-Gain Stable
♦
Available in Tiny SC70, SOT23, and µMAX
Packages
Features
MAX9914–MAX9917
Applications
Portable Medical Devices
Portable Test Equipment
RF Tags
Laptops
Data-Acquisition Equipment
PART
MAX9914EXK+T
MAX9914EXK-T
MAX9915EXT+T
MAX9915EXT-T
MAX9916EKA+T
MAX9916EKA-T
MAX9917EUB
MAX9917EUB+
MAX9916
IN+
INA+
OUTA
OUT
R1
47kΩ
INA-
GAIN =
R
G
*
IN-
INB+
OUTB
R3
10kΩ
INB-
V
SS
R2
10kΩ
(R1 + R2 + R3 + R4)
(R2 + R3)
Ordering Information
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
5 SC70-5
5 SC70-5
6 SC70-6
6 SC70-6
8 SOT23-8
8 SOT23-8
10 µMAX
10 µMAX
TOP
MARK
AGB
AGB
ACB
ACB
AEJZ
AEJZ
—
—
Typical Operating Circuit
3V
V
DD
+Denotes
lead-free package.
Selector Guide
PART
AMPLIFIERS
PER
PACKAGE
1
1
2
2
SHUTDOWN
PACKAGE
MODE
No
Yes
No
Yes
5 SC70-5
6 SC70-6
8 SOT23-8
10 µMAX
FOR R1 = R4 AND R2 = R3
GAIN = 1 +
R4
R2
MAX9914EXK-T
R4
47kΩ
MAX9915EXT-T
MAX9916EKA-T
MAX9917EUB
MICROPOWER, TWO-OP-AMP INSTRUMENTATION AMPLIFIER
*OPTIONAL INPUT RESISTOR R
G
, IS FOR GAIN ADJUSTMENT
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________
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.
1MHz, 20µA, Rail-to-Rail I/O Op Amps
with Shutdown
MAX9914–MAX9917
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (V
DD
to V
SS
) ......................-0.3V to +6.0V
IN_+, IN_-, OUT_,
SHDN_...............
(V
SS
- 0.3V) to (V
DD
+ 0.3V)
Current into IN_+, IN_- ......................................................±20mA
Output Short-Circuit Duration to V
DD
or V
SS
..............Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C) ............. 247mW
6-Pin SC70 (derate 3.1mW/°C above +70°C) ............. 245mW
8-Pin SOT23 (derate 9.1mW/°C above +70°C)........... 727mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
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
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
= 1.8V to 5.5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/ 2, R
L
=
∞
connected to V
DD
/ 2,
SHDN_
= V
DD
,
T
A
= +25°C,
unless otherwise
noted.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
V
DD
CONDITIONS
Guaranteed by PSRR test
MAX9914/MAX9915
Supply Current
I
DD
MAX9916/MAX9917
Shutdown Supply Current
Input Offset Voltage
Input-Offset-Voltage Matching
Input Bias Current
Input Offset Current
Input Resistance
Input Common-Mode Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
I
B
I
OS
R
IN
V
CM
CMRR
PSRR
I
DD(SHDN_)
V
OS
MAX9916/MAX9917
(Note 2)
(Note 2)
Common mode
Differential mode, -1mV < V
IN
< +1mV
Guaranteed by CMRR test
-0.1V < V
CM
< V
DD
+ 0.1V, V
DD
= 5.5V
1.8V < V
DD
< 5.5V
25mV < V
OUT
< V
DD
- 25mV,
R
L
= 100kΩ, V
DD
= 5.5V
100mV < V
OUT
< V
DD
- 100mV,
R
L
= 5kΩ, V
DD
= 5.5V
R
L
= 100kΩ
Output-Voltage-Swing High
V
OH
V
DD
- V
OUT
R
L
= 5kΩ
R
L
= 1kΩ
R
L
= 100kΩ
Output-Voltage-Swing Low
Channel-to-Channel Isolation
Output Short-Circuit Current
V
OL
CH
ISO
I
OUT(SC)
V
OUT
- V
SS
R
L
= 5kΩ
R
L
= 1kΩ
Specified at DC, MAX9916/MAX9917
V
SS
-
0.1
70
65
95
95
80
85
120
dB
110
2.5
50
250
2.5
50
250
100
±15
dB
mA
5
70
mV
5
70
mV
V
DD
= 1.8V
V
DD
= 5.5V
V
DD
= 1.8V
V
DD
= 5.5V
MIN
1.8
20
20
40
40
0.001
±0.2
±250
±1
±1
1
10
V
DD
+
0.1
±10
±10
50
0.5
±1
µA
mV
µV
pA
pA
GΩ
V
dB
dB
25
µA
TYP
MAX
5.5
UNITS
V
SHDN_
= GND, MAX9915/MAX9917
Open-Loop Gain
A
VOL
2
_______________________________________________________________________________________
1MHz, 20µA, Rail-to-Rail I/O Op Amps
with Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 1.8V to 5.5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/ 2, R
L
=
∞
connected to V
DD
/ 2,
SHDN_
= V
DD
,
T
A
= +25°C,
unless otherwise
noted.) (Note 1)
PARAMETER
SHDN_
Logic Low
SHDN_
Logic High
SHDN_
Input Bias Current
Output Leakage in Shutdown
Gain-Bandwidth Product
Phase Margin
Gain Margin
Slew Rate
A
V
= 1V/V
Capacitive-Load Stability (See
the
Driving Capacitive Loads
Section)
Input Voltage-Noise Density
Input Current-Noise Density
Settling Time
Delay Time to Shutdown
Delay Time to Enable
Power-Up Time
t
SH
t
EN
C
LOAD
No sustained
oscillations
f = 1kHz
f = 1kHz
To 0.1%, V
OUT
= 2V step, A
V
= -1V/V
I
DD
= 5% of normal operation,
V
DD
= 5.5V, V
SHDN_
= 5.5V to 0 step
V
OUT
= 2.7V, V
OUT
settles to 0.1%,
V
DD
= 5.5V, V
SHDN_
= 0 to 5.5V step
V
DD
= 0 to 5.5V step
A
V
= 10V/V
R
L
= 5kΩ, A
V
= 1V/V
R
ISO
= 1kΩ, A
V
= 1V/V
C
L
= 15pF
C
L
= 15pF
SYMBOL
V
IL
V
IH
I
IL
I
IH
I
OUT(SHDN_)
CONDITIONS
V
DD
= 1.8V to 3.6V, MAX9915/MAX9917
V
DD
= 3.6V to 5.5V, MAX9915/MAX9917
V
DD
= 1.8V to 3.6V, MAX9915/MAX9917
V
DD
= 3.6V to 5.5V, MAX9915/MAX9917
SHDN_
= V
SS
, MAX9915/MAX9917 (Note 2)
SHDN_
= V
DD
, MAX9915/MAX9917
SHDN_
= V
SS
, V
OUT
= 0V to V
DD
,
MAX9915/MAX9917
1
1
45
10
0.5
30
100
100
100
160
0.001
3.5
2
10
2
nV/√Hz
pA/√Hz
µs
µs
µs
µs
pF
1.4
2
1
500
500
MIN
TYP
MAX
0.4
0.8
UNITS
V
V
nA
nA
MHz
degrees
dB
V/µs
MAX9914–MAX9917
ELECTRICAL CHARACTERISTICS
(V
DD
= 1.8V to 5.5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/ 2, R
L
=
∞
connected to V
DD
/ 2,
SHDN_
= V
DD
,
T
A
= -40°C to +85°C,
unless
otherwise noted.) (Note 1)
PARAMETER
Supply Voltage Range
Supply Current
Shutdown Supply Current
Input Offset Voltage
Input-Offset-Voltage Temperature
Coefficient
SYMBOL
V
DD
I
DD
I
DD(SHDN_)
V
OS
TC
VOS
±5
CONDITIONS
Guaranteed by PSRR test
MAX9914/MAX9915
MAX9916/MAX9917
V
DD
= 5.5V
MIN
1.8
TYP
MAX
5.5
29
60
1
±3
UNITS
V
µA
µA
mV
µV/°C
SHDN_
= GND, MAX9915/MAX9917
_______________________________________________________________________________________
3
1MHz, 20µA, Rail-to-Rail I/O Op Amps
with Shutdown
MAX9914–MAX9917
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 1.8V to 5.5V, V
SS
= 0V, V
CM
= 0V, V
OUT
= V
DD
/ 2, R
L
=
∞
connected to V
DD
/ 2,
SHDN_
= V
DD
,
T
A
= -40°C to +85°C,
unless
otherwise noted.) (Note 1)
PARAMETER
Input Bias Current
Input Offset Current
Input Common-Mode Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
SYMBOL
I
B
I
OS
V
CM
CMRR
PSRR
Guaranteed by CMRR test
-0.05V < V
CM
< V
DD
+ 0.05V, V
DD
= 5.5V
1.8V < V
DD
< 5.5V
25mV < V
OUT
< V
DD
- 25mV,
R
L
= 100kΩ, V
DD
= 5.5V
150mV < V
OUT
< V
DD
- 150mV,
R
L
= 5kΩ, V
DD
= 5.5V
V
DD
- V
OUT
V
OUT
- V
SS
R
L
= 100kΩ
R
L
= 5kΩ
R
L
= 100kΩ
R
L
= 5kΩ
V
SS
-
0.05
60
60
85
dB
85
6
90
5
90
0.4
0.8
1.4
2
5
1000
1000
mV
mV
V
V
nA
nA
nA
CONDITIONS
MIN
TYP
MAX
±30
±20
V
DD
+
0.05
UNITS
pA
pA
V
dB
dB
Open-Loop Gain
A
VOL
Output-Voltage-Swing High
Output-Voltage-Swing Low
SHDN_
Logic Low
SHDN_
Logic High
SHDN_
Input Bias Current
Output Leakage in Shutdown
V
OH
V
OL
V
IL
V
IH
I
IL
I
IH
I
OUT(SHDN_)
V
DD
= 1.8V to 3.6V, MAX9915/MAX9917
V
DD
= 3.6V to 5.5V, MAX9915/MAX9917
V
DD
= 1.8V to 3.6V, MAX9915/MAX9917
V
DD
= 3.6V to 5.5V, MAX9915/MAX9917
SHDN_
= V
SS
, MAX9915/MAX9917
SHDN_
= V
DD
, MAX9915/MAX9917
SHDN_
= V
SS
, V
OUT
= 0V to V
DD
,
MAX9915/MAX9917
Note 1:
Specifications are 100% tested at T
A
= +25°C (exceptions noted). All temperature limits are guaranteed by design.
Note 2:
Guaranteed by design, not production tested
4
_______________________________________________________________________________________
1MHz, 20µA, Rail-to-Rail I/O Op Amps
with Shutdown
MAX9914–MAX9917
Typical Operating Characteristics
(V
DD
= 3V, V
SS
= V
CM
= 0V, R
L
to V
DD
/ 2, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9914 toc01
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
10
8
6
4
2
0
-2
-4
-6
V
OS
(µV)
MAX9914 toc02
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
750
500
250
0
-250
-500
-750
-1000
0
0.5
1.0
1.5
V
CM
(V)
2.0
2.5
3.0
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
MAX9914 toc03
50
45
40
35
I
CC
(µA)
30
25
20
15
10
5
0
1.8
2.6
3.3
4.1
4.8
SINGLE
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
DUAL
12
SHUTDOWN SUPPLY CURRENT (nA)
1000
5.5
-40
-15
10
35
60
85
V
SUPPLY
(V)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX9914 toc04
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX9914 toc05
INPUT BIAS CURRENT
vs. INPUT COMMON-MODE VOLTAGE
4
3
2
1
I
B
(pA)
0
-1
-2
-3
-4
-5
MAX9914 toc06
0
-20
-40
-60
V
OS
(µV)
7
6
5
4
I
B
(pA)
3
2
1
0
-1
-2
-3
I
B
+
I
B
-
5
-80
-100
-120
-140
-160
-180
-200
-40
-15
10
35
60
85
TEMPERATURE (°C)
-40
-15
10
35
60
85
-0.5
0
0.5
1.0
1.5
V
CM
(V)
2.0
2.5
3.0
3.5
TEMPERATURE (°C)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9914 toc07
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
MAX9914 toc08
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
-10
-20
-30
CMRR (dB)
-40
-50
-60
-70
-80
MAX9914 toc09
0
-10
-20
-30
PSRR (dB)
-40
-50
-60
-70
-80
-90
-100
0.1
1
10
100
1k
140
120
100
CMRR (dB)
80
60
40
20
0
0
-90
-100
-40
-15
10
35
60
85
1
10
100
1k
10k
100k
TEMPERATURE (°C)
FREQUENCY (Hz)
10k
FREQUENCY (Hz)
_______________________________________________________________________________________
5
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