MAX9914–MAX9917
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 instrumentation, 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-bandwidth 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.
Applications
●●
●●
●●
●●
●●
Portable Medical Devices
Portable Test Equipment
RF Tags
Laptops
Data-Acquisition Equipment
Typical Operating Circuit
3V
●● 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
Ordering Information
PART
TEMP RANGE
PINPACKAGE
MAX9914EXK+T
-40°C to +85°C
5 SC70
AGB
MAX9914EXK-T
-40°C to +85°C
5 SC70
AGB
MAX9915EXT+T
-40°C to +85°C
6 SC70
ACB
MAX9915EXT-T
-40°C to +85°C
6 SC70
ACB
MAX9916EKA+T
-40°C to +85°C
8 SOT23
AEJZ
MAX9916EKA-T
-40°C to +85°C
8 SOT23
AEJZ
MAX9917EUB
-40°C to +85°C
10 µMAX
—
MAX9917EUB+
-40°C to +85°C
10 µMAX
—
TOP
MARK
INARG*
GAIN =
R2
10kΩ
INB+
VSS
MICROPOWER, TWO-OP-AMP INSTRUMENTATION AMPLIFIER
*OPTIONAL INPUT RESISTOR RG, IS FOR GAIN ADJUSTMENT
(R1 + R2 + R3 + R4)
(R2 + R3)
FOR R1 = R4 AND R2 = R3
GAIN = 1 +
OUTB
INB-
PART
AMPLIFIERS
PER
PACKAGE
MAX9914EXK+T
1
No
5 SC70
MAX9915EXT+T
1
Yes
6 SC70
MAX9916EKA+T
2
No
8 SOT23
MAX9917EUB+
2
Yes
10 µMAX
OUT
R1
47kΩ
19-3407; Rev 3; 11/14
●● Ultra-Low 20μA Supply Current
Selector Guide
INA+
OUTA
IN-
●● High 1MHz GBW
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
VDD
MAX9916
IN+
Features
R3
10kΩ
R4
R2
SHUTDOWN
PACKAGE
MODE
R4
47kΩ
μMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Absolute Maximum Ratings
Power-Supply Voltage (VDD to VSS).....................-0.3V to +6.0V
IN_+, IN_-, OUT_, SHDN_............. (VSS - 0.3V) to (VDD + 0.3V)
Current into IN_+, IN_-......................................................±20mA
Output Short-Circuit Duration to VDD or VSS.............Continuous
Continuous Power Dissipation (TA = +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 5.1mW/°C above +70°C)...........408mW
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
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
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = ∞ connected to VDD/2, SHDN_ = VDD, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
VDD
CONDITIONS
Guaranteed by PSRR test
MAX9914/MAX9915
Supply Current
IDD
MAX9916/MAX9917
Shutdown Supply Current
Input Offset Voltage
IDD(SHDN_)
MIN
1.8
MAX
UNITS
5.5
V
VDD = 1.8V
20
VDD = 5.5V
20
VDD = 1.8V
40
VDD = 5.5V
40
50
0.001
0.5
µA
±0.2
±1
mV
SHDN_ = GND, MAX9915/MAX9917
VOS
Input-Offset-Voltage Matching
TYP
25
±250
MAX9916/MAX9917
µA
µV
IB
(Note 2)
±1
±10
pA
Input Offset Current
IOS
(Note 2)
±1
±10
pA
Input Resistance
RIN
Common mode
1
Differential mode, -1mV < VIN < +1mV
10
Input Bias Current
Input Common-Mode Range
VCM
Guaranteed by CMRR test
VSS - 0.1
GΩ
VDD + 0.1
V
Common-Mode Rejection Ratio
CMRR
-0.1V < VCM < VDD + 0.1V, VDD = 5.5V
70
80
dB
Power-Supply Rejection Ratio
PSRR
1.8V < VDD < 5.5V
65
85
dB
25mV < VOUT < VDD - 25mV,
RL = 100kΩ, VDD = 5.5V
95
120
100mV < VOUT < VDD - 100mV,
RL = 5kΩ, VDD = 5.5V
95
110
Open-Loop Gain
Output-Voltage-Swing High
Output-Voltage-Swing Low
AVOL
VOH
VOL
Channel-to-Channel Isolation
CHISO
Output Short-Circuit Current
IOUT(SC)
www.maximintegrated.com
VDD - VOUT
VOUT - VSS
dB
RL = 100kΩ
2.5
5
RL = 5kΩ
50
70
RL = 1kΩ
250
RL = 100kΩ
2.5
5
RL = 5kΩ
50
70
RL = 1kΩ
250
Specified at DC, MAX9916/MAX9917
mV
mV
100
dB
±15
mA
Maxim Integrated │ 2
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Electrical Characteristics (continued)
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = ∞ connected to VDD/2, SHDN_ = VDD, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
SHDN_ Logic Low
VIL
SHDN_ Logic High
VIH
SHDN_ Input Bias Current
Output Leakage in Shutdown
CONDITIONS
TYP
MAX
0.4
VDD = 3.6V to 5.5V, MAX9915/MAX9917
0.8
VDD = 1.8V to 3.6V, MAX9915/MAX9917
1.4
VDD = 3.6V to 5.5V, MAX9915/MAX9917
2
IIL
SHDN_ = VSS, MAX9915/MAX9917 (Note 2)
IIH
SHDN_ = VDD, MAX9915/MAX9917
IOUT(SHDN_)
MIN
VDD = 1.8V to 3.6V, MAX9915/MAX9917
500
1
Gain-Bandwidth Product
V
V
1
SHDN_ = VSS, VOUT = 0V to VDD,
MAX9915/MAX9917
UNITS
500
nA
nA
1
MHz
Phase Margin
CL = 15pF
45
degrees
Gain Margin
CL = 15pF
10
dB
0.5
V/µs
Slew Rate
Capacitive-Load Stability (See
the Driving Capacitive Loads
Section)
CLOAD
No sustained
oscillations
AV = 1V/V
30
AV = 10V/V
100
RL = 5kΩ, AV = 1V/V
100
RISO = 1kΩ, AV = 1V/V
100
pF
Input Voltage-Noise Density
f = 1kHz
160
nV/√Hz
Input Current-Noise Density
f = 1kHz
0.001
pA/√Hz
Settling Time
To 0.1%, VOUT = 2V step, AV = -1V/V
3.5
µs
Delay Time to Shutdown
tSH
IDD = 5% of normal operation,
VDD = 5.5V, VSHDN_ = 5.5V to 0 step
2
µs
Delay Time to Enable
tEN
VOUT = 2.7V, VOUT settles to 0.1%,
VDD = 5.5V, VSHDN_ = 0 to 5.5V step
10
µs
VDD = 0 to 5.5V step
2
µs
Power-Up Time
Electrical Characteristics
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = ∞ connected to VDD/2, SHDN_ = VDD, TA = -40°C to +85°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
Supply Voltage Range
VDD
Supply Current
IDD
Shutdown Supply Current
Input Offset Voltage
www.maximintegrated.com
IDD(SHDN_)
VOS
CONDITIONS
Guaranteed by PSRR test
MAX9914/MAX9915
MAX9916/MAX9917
VDD = 5.5V
SHDN_ = GND, MAX9915/MAX9917
MIN
1.8
TYP
MAX
UNITS
5.5
V
29
60
µA
1
µA
±3
mV
Maxim Integrated │ 3
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Electrical Characteristics (continued)
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL = ∞ connected to VDD/2, SHDN_ = VDD, TA = -40°C to +85°C, unless
otherwise noted.) (Note 1)
PARAMETER
Input-Offset-Voltage
Temperature Coefficient
(Note 2)
SYMBOL
CONDITIONS
MIN
TYP
MAX
±5
TCVOS
UNITS
µV/°C
IB
±30
pA
Input Offset Current
IOS
±20
pA
Input Common-Mode Range
VCM
Input Bias Current
Guaranteed by CMRR test
VSS - 0.05
VDD + 0.05
V
Common-Mode Rejection Ratio
CMRR
-0.05V < VCM < VDD + 0.05V, VDD = 5.5V
60
dB
Power-Supply Rejection Ratio
PSRR
1.8V < VDD < 5.5V
60
dB
25mV < VOUT < VDD - 25mV,
RL = 100kΩ, VDD = 5.5V
85
150mV < VOUT < VDD - 150mV,
RL = 5kΩ, VDD = 5.5V
85
Open-Loop Gain
AVOL
Output-Voltage-Swing High
VOH
VDD - VOUT
Output-Voltage-Swing Low
VOL
VOUT - VSS
SHDN_ Logic Low
VIL
SHDN_ Logic High
VIH
SHDN_ Input Bias Current
Output Leakage in Shutdown
dB
RL = 100kΩ
6
RL = 5kΩ
90
RL = 100kΩ
5
RL = 5kΩ
90
VDD = 1.8V to 3.6V, MAX9915/MAX9917
0.4
VDD = 3.6V to 5.5V, MAX9915/MAX9917
0.8
VDD = 1.8V to 3.6V, MAX9915/MAX9917
1.4
VDD = 3.6V to 5.5V, MAX9915/MAX9917
2
mV
mV
V
V
IIL
SHDN_ = VSS, MAX9915/MAX9917
5
nA
IIH
SHDN_ = VDD, MAX9915/MAX9917
1000
nA
SHDN_ = VSS, VOUT = 0V to VDD,
MAX9915/MAX9917
1000
nA
IOUT(SHDN_)
Note 1: Specifications are 100% tested at TA = +25°C (exceptions noted). All temperature limits are guaranteed by design.
Note 2: Guaranteed by design, not production tested
www.maximintegrated.com
Maxim Integrated │ 4
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Typical Operating Characteristics
(VDD = 3V, VSS = VCM = 0V, RL to VDD/2, TA = +25°C, unless otherwise noted.)
DUAL
40
TA = +25°C
TA = +85°C
20
SINGLE
15
10
5
3.3
4.1
4.8
0
-250
0
-500
-2
-750
-4
-15
-40
10
35
60
85
-1000
2.0
2.5
3.0
INPUT BIAS CURRENT
vs. INPUT COMMON-MODE VOLTAGE
7
6
5
IB (pA)
3
-100
5
4
3
2
IB-
IB+
2
1
0
-1
-120
1
-140
0
-2
-160
-1
-3
-180
-2
-4
-200
-3
-5
-15
10
35
60
85
-40
-15
10
35
60
85
-0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
TEMPERATURE (°C)
TEMPERATURE (°C)
VCM (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
140
MAX9914 toc07
-10
-20
120
0
-10
-20
100
CMRR (dB)
-40
-50
-60
-70
-30
CMRR (dB)
-30
80
60
1
10
100
FREQUENCY (Hz)
www.maximintegrated.com
1k
10k
0
-50
-60
-80
20
-90
-40
-70
40
-80
0.1
1.5
INPUT BIAS CURRENT
vs. TEMPERATURE
-80
-100
1.0
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
4
0
0.5
0
VCM (V)
-60
-40
TA = +25°C
TA = -40°C
TEMPERATURE (°C)
-40
VOS (µV)
2
TA = +85°C
250
VSUPPLY (V)
-20
PSRR (dB)
4
-6
5.5
MAX9914 toc04
0
2.6
500
6
MAX9914 toc06
1.8
750
MAX9914 toc09
0
8
IB (pA)
25
TA = -40°C
1000
MAX9914 toc05
30
10
MAX9914 toc08
ICC (µA)
35
12
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
MAX9914 toc03
TA = +85°C
VOS (µV)
TA = -40°C
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX9914 toc02
TA = +25°C
45
SHUTDOWN SUPPLY CURRENT (nA)
50
MAX9914 toc01
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
-90
-40
-15
10
35
TEMPERATURE (°C)
60
85
-100
1
10
100
1k
10k
100k
FREQUENCY (Hz)
Maxim Integrated │ 5
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD/2, TA = +25°C, unless otherwise noted.)
1.5
1.0
0.5
0
-0.5
100
RL = 5kΩ
RL = 100kΩ
10
RL TO VSS
VOH = VDD - VOUT
-1.0
1.8
3.8
4.8
-40
-15
60
1
85
140
RL = 100kΩ
RL = 5kΩ
100
MAX9914 toc12
35
60
85
60
100
RL = 1kΩ
80
60
0
0
-15
-40
10
35
60
85
-40
-15
TEMPERATURE (°C)
MAX9914 toc16
100
AV = 1000V/V
GAIN
180
45
0
PHASE
-45
-40
-90
-60
-135
-80
-180
-100
-225
100
1k
10k
100k
FREQUENCY (Hz)
www.maximintegrated.com
1M
10M
-270
CROSSTALK (dB)
20
PHASE (DEGREES)
90
60
85
135
90
20
45
0
0
PHASE
-20
-45
-40
-90
-60
-135
-80
-180
-100
-225
1
10
100
1k
10k
100k
1M
10M
-270
FREQUENCY (Hz)
CROSSTALK vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX9916/MAX9917
0
-10
-20
-30
-40
-60
-80
-40
-50
-60
VOUT = 2VP-P
-70
-80
-100
-120
180
TEMPERATURE (°C)
-20
135
40
10
0
225
35
THD+N (dB)
GAIN AND PHASE
vs. FREQUENCY (RL = 5kΩ, CLOAD = 100pF)
10
225
40
-120
MAX9914 toc17
20
AV = 1000V/V
GAIN
60
40
20
MAX9914 toc15
80
GAIN (dB)
RL = 1kΩ
1
10
MAX9914 toc18
160
AVOL (dB)
80
-20
-15
-40
GAIN AND PHASE
vs. FREQUENCY (RL = ∞, CLOAD = 15pF)
RL = 5kΩ
0
RL TO VDD
VOL = VOUT - VSS
OPEN-LOOP GAIN
vs. TEMPERATURE (RL TO VDD)
120
60
RL = 100kΩ
OPEN-LOOP GAIN
vs. TEMPERATURE (RL TO VSS)
RL = 100kΩ
80
10
TEMPERATURE (°C)
40
GAIN (dB)
35
RL = 5kΩ
TEMPERATURE (°C)
100
-120
10
100
SUPPLY VOLTAGE (V)
120
AVOL (dB)
1
5.5
MAX9914 toc14
140
2.8
MAX9914 toc13
-1.5
RL = 1kΩ
-90
10
100
1k
FREQUENCY (Hz)
10k
100k
-100
10
100
1k
10k
FREQUENCY (Hz)
Maxim Integrated │ 6
PHASE (DEGREES)
2.0
OUTPUT-SWING LOW
vs. TEMPERATURE
1000
OUTPUT VOLTAGE SWING (mV)
2.5
RL = 1kΩ
OUTPUT VOLTAGE SWING (mV)
3.0
SLEW RATE (V/µs)
1000
MAX9914 toc10
3.5
OUTPUT-SWING HIGH
vs. TEMPERATURE
MAX9914 toc11
SLEW RATE vs. SUPPLY VOLTAGE
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD/2, TA = +25°C, unless otherwise noted.)
3000
MAX9914 toc19
POWER-UP SETTLING TIME
MAX9914 toc21
AV = 1V/V
FOR AV = 10V/V NO RISO NEEDED
2500
2000
1000
1500
1000
OUTPUT
500mV/div
500
10
100
1k
10k
0
100k
10
100
FREQUENCY (Hz)
1000
IN+ = VDD / 2
AV = 1V/V
1µs/div
10,000
CLOAD (pF)
SMALL-SIGNAL GAIN
vs. FREQUENCY
SHUTDOWN RESPONSE
MAX9914 toc22
10
8
3V
6
SHDN = 3V
1.5V
0V
2
0
-2
1
0
-1
-2
-6
-3
-8
-10
20µs/div
AV = 1V/V
VOUT = 2VP-P
CLOAD = 15pF
3
2
-4
OUTPUT
4
4
GAIN (dB)
0V
AV = 1V/V
VOUT = 100mVP-P
CLOAD = 15pF
GAIN (dB)
IN+ = VDD / 2
AV = 1V/V
LARGE-SIGNAL GAIN
vs. FREQUENCY
1k
10k
100k
1M
10M
-4
10
1
FREQUENCY (Hz)
1000
SMALL-SIGNAL PULSE RESPONSE
(CLOAD = 100pF)
MAX9914 toc25
MAX9914 toc26
AV = 10V/V
AV = 1V/V
IN+
50mV/div
IN+
5mV/div
OUTPUT
50mV/div
OUTPUT
50mV/div
www.maximintegrated.com
100
FREQUENCY (kHz)
SMALL-SIGNAL PULSE RESPONSE
(CLOAD = 15pF)
1µs/div
MAX9914 toc24
1
MAX9914 toc23
100
VDD
1V/div
RISO (Ω)
VOLTAGE NOISE (nV/√Hz)
10,000
RESISTOR ISOLATION
vs. CAPACITIVE LOAD
MAX9914 toc20
VOLTAGE-NOISE DENSITY
vs. FREQUENCY
5µs/div
Maxim Integrated │ 7
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD/2, TA = +25°C, unless otherwise noted.)
LARGE-SIGNAL PULSE RESPONSE
(CLOAD = 15pF)
LARGE-SIGNAL PULSE RESPONSE
(CLOAD = 100pF)
MAX9914 toc27
MAX9914 toc28
AV = 10V/V
AV = 1V/V
IN+
1V/div
IN+
100mV/div
OUTPUT
1V/div
OUTPUT
1V/div
5µs/div
PERCENT OVERSHOOT
vs. CAPACITIVE LOAD
OUTPUT WAVEFORM WITH RISO
(CLOAD = 47pF, RISO = 2.3kΩ)
6
OVERSHOOT (%)
MAX9914 toc30
MAX9914 toc29
7
5µs/div
5
AV = 1V/V
INPUT
50mV/div
RL = 1MΩ
RL = 100kΩ
4
3
RL = 10kΩ
OUTPUT
50mV/div
2
1
0
20
40
60
80
5µs/div
100
CLOAD (pF)
OUTPUT WAVEFORM WITHOUT RISO
(CLOAD = 47pF)
MAX9914 toc31
AV = 1V/V
IN+
50mV/div
OUTPUT
50mV/div
5µs/div
www.maximintegrated.com
Maxim Integrated │ 8
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Pin Description
PIN
NAME
FUNCTION
MAX9914
MAX9915
MAX9916
MAX9917
1
1
—
—
IN+
Noninverting Amplifier Input
2
2
4
4
VSS
Negative Supply Voltage
3
3
—
—
IN-
Inverting Amplifier Input
4
4
—
—
OUT
Amplifier Output
5
6
8
10
VDD
Positive Supply Voltage
—
5
—
—
SHDN
Shutdown
—
—
1
1
OUTA
Amplifier Output Channel A
—
—
2
2
INA-
Inverting Amplifier Input Channel A
—
—
3
3
INA+
Noninverting Amplifier Input Channel A
—
—
—
5
SHDNA
Shutdown Channel A
—
—
—
6
SHDNB
Shutdown Channel B
—
—
5
7
INB+
Noninverting Amplifier Input Channel B
—
—
6
8
INB-
Inverting Amplifier Input Channel B
—
—
7
9
OUTB
Detailed Description
Featuring a maximized ratio of gain bandwidth to supply
current, low operating supply voltage, low input bias current, and rail-to-rail inputs and outputs, the MAX9914–
MAX9917 are an excellent choice for precision or general-purpose low-current, low-voltage, battery-powered
applications. These CMOS devices consume an ultra-low
20μA (typ) supply current and a 200μV (typ) offset voltage. For additional power conservation, the MAX9914/
MAX9917 feature a lowpower shutdown mode that
reduces supply current to 1nA (typ), and puts the amplifiers’ output in a highimpedance state. These devices are
unity-gain stable with a 1MHz gain-bandwidth product
driving capacitive loads up to 30pF. The capacitive load
can be increased to 100pF when the amplifier is configured for a 10V/V gain.
Rail-to-Rail Inputs and Outputs
The MAX9914–MAX9917 amplifiers all have a parallelconnected n- and p-channel differential input stage that
allows an input common-mode voltage range that extends
100mV beyond the positive and negative supply rails, with
excellent common-mode rejection.
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Amplifier Output Channel B
The MAX9914–MAX9917 are capable of driving the output to within 5mV of both supply rails with a 100kΩ load.
These devices can drive a 5kΩ load with swings to within
60mV of the rails. Figure 1 shows no clipping at the output
voltage swing of the MAX9914–MAX9917 configured as a
unity-gain buffer powered from a single 3V supply.
Low Input Bias Current
The MAX9914–MAX9917 feature ultra-low 1pA (typ) input
bias current. The variation in the input bias current is
minimal with changes in the input voltage due to very high
input impedance (in the order of 1GΩ).
Applications Information
Driving Capacitive Loads
The MAX9914–MAX9917 amplifiers are unity-gain stable
for loads up to 30pF. However, the capacitive load can be
increased to 100pF when the amplifier is configured for a
minimum gain of 10V/V.
Applications that require greater capacitive drive capability should use an isolation resistor between the output and
the capacitive load (Figure 2). Also, in unity-gain applications with relatively small RL (about 5kΩ), the capacitive
load can be increased up to 100pF.
Maxim Integrated │ 9
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Power-Supply Considerations
RAIL-TO-RAIL OUTPUT VOLTAGE RANGE
The MAX9914–MAX9917 are optimized for single 1.8V
to 5.5V supply operation. A high amplifier power-supply
rejection ratio of 85dB (typ) allows the devices to be
powered directly from a battery, simplifying design and
extending battery life.
3V
IN_
1V/div
0V
Power-Up Settling Time
The MAX9914–MAX9917 typically require 2μs after power-up. Supply settling time depends on the supply voltage,
the value of the bypass capacitor, the output impedance of the incoming supply, and any lead resistance or
inductance between components. Op amp settling time
depends primarily on the output voltage and is slew-rate
limited. Figure 3 shows the MAX991_ in a noninverting
voltage follower configuration with the input held at midsupply. The output settles in approximately 3.5μs for VDD
= 3V (see the Typical Operating Characteristics for the
Power-Up Settling Time graph).
3V
OUT_
1V/div
0V
VDD = 3V
200µs/div
Figure 1. Rail-to-Rail Output Voltage Range
Shutdown Mode
The MAX9915 and MAX9917 feature active-low shutdown
inputs. The MAX9915 and MAX9917 enter shutdown in
2μs (typ) and exit shutdown in 10μs (typ). The amplifiers’
outputs are high impedance in shutdown mode. Drive
SHDN low to enter shutdown. Drive SHDN high to enable
the amplifier. The MAX9917 dual amplifier features separate shutdown inputs. Shut down both amplifiers for lowest quiescent current.
Power-Supply Bypassing and Layout
Bypass VDD with a 0.1μF capacitor to ground as close to
the pin as possible to minimize noise.
Good layout techniques optimize performance by decreasing the amount of stray capacitance and inductance to the
op amp’s inputs and outputs. Minimize stray capacitance
and inductance, by placing external components close to
the IC.
RISO
MAX9914–
MAX9917
RL
AV =
CL
RL
1V/V
RL + RISO
Figure 2. Using a Resistor to Isolate a Capacitive Load from
the Op Amp
0V
5.5V
100kΩ
IN-
VDD
OUT
IN+
VSS
MAX991_
100kΩ
Figure 3. Power-Up Test Configuration
www.maximintegrated.com
Maxim Integrated │ 10
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Pin Configurations
TOP VIEW
MAX9914
IN+
+
1
MAX9915
5
VDD
VSS 2
IN- 3
4
OUT
IN+
1
+
6
VDD
VSS 2
5
SHDN
IN- 3
4
OUT
SC70
SC70
MAX9916
OUTA
1
+
MAX9917
8
VDD
INA- 2
7
OUTB
INA+ 3
6
INB-
VSS 4
5
INB+
PROCESS: BiCMOS
www.maximintegrated.com
+
OUTA
1
INA-
2
9
OUTB
INA+ 3
8
INB-
7
INB+
6
SHDNB
VSS 4
SHDNA 5
SOT23
Chip Information
SHDN
10 VDD
SHDNA
SHDNB
µMAX
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
5 SC70
X5+1
21-0076
90-0188
6 SC70
X6SN+1
21-0077
90-0189
8 SOT23
K8+5
21-0078
90-0176
10 μMAX
U10+2
21-0061
90-0330
Maxim Integrated │ 11
MAX9914–MAX9917
1MHz, 20μA, Rail-to-Rail
I/O Op Amps with Shutdown
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
0
11/04
Initial release
1
10/05
Removed future product asterisks from MAX9916/MAX9917, edited VOL/
VOH specifications in the EC table, removed MAX9916 8-pin µMAX package.
2
6/13
Updated Electrical Characteristics
3
11/14
Updated Absolute Maximum Ratings and Electrical Characteristics
DESCRIPTION
—
1, 2, 11
3, 4
2, 3, 4
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2014 Maxim Integrated Products, Inc. │ 12
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