19-3406; Rev 2; 10/10
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
The single MAX9910/MAX9911 and dual MAX9912/
MAX9913 operational amplifiers (op amps) feature a
maximized ratio of gain bandwidth (GBW) 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 input-bias current of 1pA, railto-rail inputs and outputs, low supply current of 4µA,
and operate from a single 1.8V to 5.5V supply. For
additional power conservation, the MAX9911/MAX9913
feature a low-power shutdown mode that reduces supply current to 1nA, and puts the amplifiers’ outputs in a
high-impedance state. These devices are unity-gain
stable with a 200kHz GBW product.
The MAX9910 is available in a 5-pin SC70 package. The
MAX9911 is available in tiny 6-bump WLP and a 6-pin
SC70 packages. The MAX9912 is available in an 8-pin
SOT23 package, and the MAX9913 is available in a 10pin µMAX® package. All devices are specified over the
-40°C to +85°C extended operating temperature range.
Features
o 200kHz GBW
o Ultra-Low 4µA Supply Current
o Single 1.8V to 5.5V Supply Voltage Range
o Ultra-Low 1pA Input Bias Current
o Rail-to-Rail Input and Output Voltage Ranges
o Low ±200µV Input Offset Voltage
o Low 0.001µA Shutdown Current
o High-Impedance Output During Shutdown
(MAX9911/MAX9913)
o Unity-Gain Stable
o Available in Tiny WLP, SC70, SOT23, and µMAX
Packages
Ordering Information
Applications
Portable Medical Devices
PART
TEMP RANGE
PINPACKAGE
Portable Test Equipment
MAX9910EXK+T
-40°C to +85°C
5 SC70
AGA
Laptops
MAX9910EXK-T
-40°C to +85°C
5 SC70
AGA
Data-Acquisition Equipment
MAX9911EXT+T
-40°C to +85°C
6 SC70
ACA
MAX9911EXT-T
-40°C to +85°C
6 SC70
ACA
MAX9911EWT+
-40°C to +85°C
6 WLP
BQ
Typical Operating Circuit
1.8V TO 5.5V
OUTA
VDD
VOUT
OUTB
INA-
TOP
MARK
MAX9912EKA+T
-40°C to +85°C
8 SOT23
AEJY
MAX9912EKA-T
-40°C to +85°C
8 SOT23
AEJY
MAX9913EUB
-40°C to +85°C
10 µMAX
—
MAX9913EUB+
-40°C to +85°C
10 µMAX
—
+Denotes lead(Pb)-free/RoHS-compliant package.
25kΩ
VMID
INB-
INA+
INB+
VSS
VMID + VBIAS
Selector Guide
MAX9913
ON
ON
SHDNA
SHDNB
OFF
OFF
1MΩ
RE
CE
GLUCOSE
WE
SENSOR
PART
AMPLIFIERS
PER PACKAGE
SHUTDOWN
MODE
MAX9910EXK-T
1
No
MAX9911EXT-T
1
Yes
MAX9912EKA-T
2
No
MAX9913EUB
2
Yes
THREE ELECTRODE GLUCOSE METER APPLICATION WITH SHUTDOWN
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ 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.mxim-ic.com.
MAX9910–MAX9913
General Description
MAX9910–MAX9913
200kHz, 4µA, 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-Bump WLP (derate 10.5mW/°C above +70°C).........840mW
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 (excluding WLP, soldering 10s) ........+300°C
Soldering Temperature (reflow)
Lead(Pb)-Free Packages.............................................+260°C
Packages Containing Lead(Pb)...................................+240°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
MAX9910/MAX9911
Supply Current
IDD
MAX9912/MAX9913
Shutdown Supply Current
Input Offset Voltage
IDD(SHDN_)
Input Offset Current
TYP
1.8
VDD = 1.8V
4
VDD = 5.5V
4
VDD = 1.8V
7
VDD = 5.5V
MAX
UNITS
5.5
V
5.0
µA
7
9
SHDN_ = GND, MAX9911/MAX9913
0.001
0.5
µA
±0.2
±1
mV
MAX9912/MAX9913
±250
VOS
Input-Offset-Voltage Matching
Input Bias Current
MIN
µV
IB
(Note 2)
±1
±10
pA
IOS
(Note 2)
±1
±10
pA
Common mode
1
Differential mode, -1mV < VIN < +1mV
10
Input Resistance
RIN
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
95
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
AVOL
RL = 100kΩ
Output-Voltage-Swing High
Output-Voltage-Swing Low
VOH
VOL
Channel-to-Channel Isolation
CHISO
Output Short-Circuit Current
IOUT(SC)
2
VDD - VOUT
VOUT - VSS
dB
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, MAX9912/MAX9913
mV
mV
100
dB
±15
mA
_______________________________________________________________________________________
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
(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, MAX9911/MAX9913
0.8
VDD = 1.8V to 3.6V, MAX9911/MAX9913
1.4
VDD = 3.6V to 5.5V, MAX9911/MAX9913
2
IIL
SHDN_ = VSS, MAX9911/MAX9913 (Note 2)
IIH
SHDN_ = VDD , MAX9911/MAX9913
IOUT(SHDN_)
MIN
VDD = 1.8V to 3.6V, MAX9911/MAX9913
V
V
1
500
SHDN_ = VSS, VOUT = 0V to VDD,
MAX9911/MAX9913
UNITS
1
500
nA
nA
Gain-Bandwidth Product
200
kHz
Slew Rate
0.1
V/µs
Capacitive-Load Stability (See
the Driving Capacitive Loads
Section)
CLOAD
No sustained
oscillations
AV = 1V/V
30
AV = 10V/V
250
RL = 5kΩ, AV = 1V/V
200
RISO = 1kΩ, AV = 1V/V
pF
100
Input Voltage-Noise Density
f = 1kHz
400
nV/√Hz
Input Current-Noise Density
f = 1kHz
0.001
pA/√Hz
Settling Time
To 0.1%, VOUT = 2V step, AV = -1V/V
18
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
30
µs
VDD = 0 to 5.5V step
5
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
Supply Voltage Range
Supply Current
SYMBOL
VDD
IDD
Shutdown Supply Current
Input Offset Voltage
IDD(SHDN_)
CONDITIONS
Guaranteed by PSRR test
MAX9910/MAX9911
MAX9912/MAX9913
MIN
TYP
1.8
TCVOS
UNITS
5.5
V
5.5
VDD = 5.5V
11
SHDN_ = GND, MAX9911/MAX9913
VOS
Input-Offset-Voltage
Temperature Coefficient
MAX
±5
µA
1
µA
±5
mV
µV/°C
_______________________________________________________________________________________
3
MAX9910–MAX9913
ELECTRICAL CHARACTERISTICS (continued)
MAX9910–MAX9913
200kHz, 4µA, 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
MAX
UNITS
IB
±30
pA
Input Offset Current
IOS
±20
pA
Input Common-Mode Range
VCM
VDD +
0.05
V
Input Bias Current
SYMBOL
CONDITIONS
Guaranteed by CMRR test
MIN
TYP
VSS 0.05
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
59
dB
25mV < VOUT < VDD - 25mV,
RL = 100kΩ, VDD = 5.5V
85
150mV < VOUT < VDD - 150mV,
RL = 5kΩ, VDD = 5.5V
80
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
5
RL = 5kΩ
90
RL = 100kΩ
5
RL = 5kΩ
90
VDD = 1.8V to 3.6V
0.4
VDD = 3.6V to 5.5V
0.8
VDD = 1.8V to 3.6V, MAX9911/MAX9913
1.4
VDD = 3.6V to 5.5V, MAX9911/MAX9913
2
mV
V
V
IIL
SHDN_ = VSS, MAX9911/MAX9913
5
nA
IIH
SHDN_ = VDD, MAX9911/MAX9913
1000
nA
1000
nA
SHDN_ = VSS, VOUT = 0V to VDD,
IOUT(SHDN_)
MAX9911/MAX9913
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.
4
mV
_______________________________________________________________________________________
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
6
TA = +85°C
TA = +25°C
5
TA = +25°C
SINGLE
TA = -40°C
3
TA = +85°C
2
6
2.6
3.4
4.2
5.0
TA = +25°C
0
-250
4
-500
2
-750
-40
5.5
TA = +85°C
-1000
-15
10
35
60
85
0
0.5
1.0
1.5
2.0
2.5
3.0
TEMPERATURE (°C)
VCM (V)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT BIAS CURRENT
vs. INPUT COMMON-MODE VOLTAGE
7
MAX9910 toc04
150
100
6
5
50
5
4
3
4
-50
-100
2
IB-
3
1
IB (pA)
IB (pA)
0
2
1
-150
0
-1
0
-200
-2
IB+
-250
-1
-300
-2
-4
-350
-3
-5
-15
10
35
60
-3
-40
85
-15
10
35
60
85
-0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
TEMPERATURE (°C)
TEMPERATURE (°C)
VCM (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
-20
0
MAX9910 toc08
140
MAX9910 toc07
0
120
-10
-20
100
-80
CMRR (dB)
CMRR (dB)
-60
3.5
-30
-40
PSRR (dB)
MAX9910 toc03
250
VSUPPLY (V)
200
-40
TA = -40°C
MAX9910 toc06
1.8
VOS (µV)
500
8
0
1
750
MAX9910 toc09
4
10
MAX9910 toc05
ICC (µA)
7
1000
VOS (µV)
TA = -40°C
DUAL
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
MAX9910 toc02
8
12
SHUTDOWN SUPPLY CURRENT (nA)
9
MAX9910 toc01
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
80
60
-40
-50
-60
-70
40
-80
-100
20
-120
0
0.1
1
10
100
FREQUENCY (Hz)
1k
10k
-90
-100
-40
-15
10
35
TEMPERATURE (°C)
60
85
1
10
100
1k
10k
100k
FREQUENCY (Hz)
_______________________________________________________________________________________
5
MAX9910–MAX9913
Typical Operating Characteristics
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25°C, unless otherwise noted.)
0.1
0
-0.1
-0.2
100
RL = 5kΩ
10
RL = 100kΩ
3.4
4.2
5.0
RL = 100kΩ
10
-40
5.5
-15
10
35
60
-40
85
-15
10
35
60
TEMPERATURE (°C)
TEMPERATURE (°C)
OPEN-LOOP GAIN
vs. TEMPERATURE (RL TO VSS)
OPEN-LOOP GAIN
vs. TEMPERATURE (RL TO VDD)
GAIN AND PHASE
vs. FREQUENCY (RL = ∞, CLOAD = 15pF)
140
MAX9910 toc13
120
RL = 100kΩ
120
100
AVOL (dB)
RL = 5kΩ
80
RL = 1kΩ
60
80
40
40
20
20
0
RL = 1kΩ
60
-15
10
35
60
85
60
135
40
90
45
20
PHASE
0
0
-20
-45
-40
-90
-60
-135
-80
0
-40
-40
-15
10
35
60
-180
1
85
10
100
1k
10k
100k
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (Hz)
GAIN AND PHASE
vs. FREQUENCY (RL = 5kΩ, CLOAD = 100pF)
CROSSTALK
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
225
40
90
20
45
PHASE
0
-20
-45
-40
-90
-60
-135
-80
-180
-225
-100
100
1k
10k
FREQUENCY (Hz)
100k
1M
-5
-20
-15
-25
-35
-40
THD+N (dB)
135
10
MAX9912/MAX9913
CROSSTALK (dB)
GAIN
60
1
0
180
PHASE (DEGREES)
80
1M
MAX9910 toc18
AV = 1000V/V
MAX9910 toc17
MAX9910 toc16
100
180
AV = 1000V/V
GAIN
RL = 5kΩ
100
MAX9910 toc15
80
GAIN (dB)
RL = 100kΩ
0
85
SUPPLY VOLTAGE (V)
140
GAIN (dB)
RL = 5kΩ
1
1
-0.4
2.6
100
RL TO VSS
VOH = VDD - VOUT
-0.3
1.8
RL = 1kΩ
-60
-45
-55
-65
-80
-75
VOUT = 2VP-P
-100
-85
-95
-120
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
_______________________________________________________________________________________
10k
PHASE (DEGREES)
0.2
VOL = VOUT - VSS
RL TO VDD
1000
MAX9910 toc14
SLEW RATE (V/µS)
0.3
10000
MAX9910 toc12
0.4
RL = 1kΩ
OUTPUT VOLTAGE SWING (mV)
0.5
MAX9910 toc11
1000
MAX9910 toc10
0.6
6
OUTPUT-SWING LOW
vs. TEMPERATURE
OUTPUT-SWING HIGH
vs. TEMPERATURE
OUTPUT VOLTAGE SWING (mV)
SLEW RATE
vs. SUPPLY VOLTAGE
AVOL (dB)
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
RESISTOR ISOLATION
vs. CAPACITIVE LOAD
VOLTAGE-NOISE DENSITY
vs. FREQUENCY
POWER-UP SETTLING TIME
MAX9910 toc19
AV = 1V/V
FOR AV = 10V/V
NO RISO NEEDED
7000
MAX9910 toc20
MAX9910 toc21
8000
6000
RISO (Ω)
VOLTAGE NOISE (nV/√Hz)
10,000
1000
VDD
1V/div
5000
4000
3000
OUTPUT
500mV/div
2000
1000
IN+ = VDD / 2
AV = 1V/V
0
100
1
10
100
1k
10k
10
100k
100
500ns/div
10,000
1000
FREQUENCY (Hz)
CLOAD (pF)
SHUTDOWN RESPONSE
SMALL-SIGNAL PULSE RESPONSE
(CLOAD = 15pF)
SMALL-SIGNAL PULSE RESPONSE
(CLOAD = 100pF)
MAX9910 toc23
MAX9910 toc22
SHDN
MAX9910 toc24
AV = 10V/V
AV = 1V/V
IN+ = VDD / 2
AV = 1V/V
3V
IN+
50mV/div
IN+
5mV/div
OUTPUT
50mV/div
OUTPUT
50mV/div
0V
1.5V
OUTPUT
0V
20µs/div
10µs/div
20µs/div
LARGE-SIGNAL PULSE RESPONSE
(CLOAD = 15pF)
LARGE-SIGNAL PULSE RESPONSE
(CLOAD = 100pF)
MAX9910 toc25
MAX9910 toc26
AV = 1V/V
AV = 10V/V
IN+
1V/div
IN+
100mV/div
OUTPUT
1V/div
OUTPUT
1V/div
10µs/div
100µs/div
_______________________________________________________________________________________
7
MAX9910–MAX9913
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25°C, unless otherwise noted.)
AV = +1V/V
VOUT = 100mVP-P
CLOAD = 15pF
8
6
4
MAX9910 toc27
10
MAX9910 toc28
LARGE-SIGNAL GAIN
vs. FREQUENCY
SMALL-SIGNAL GAIN
vs. FREQUENCY
AV = +1V/V
VOUT = 2VP-P
CLOAD = 15pF
3
2
1
2
GAIN (dB)
GAIN (dB)
4
0
-2
0
-1
-4
-2
-6
-3
-8
-4
-10
1
10
1
1000
100
10
100
FREQUENCY (kHz)
FREQUENCY (kHz)
PERCENT OVERSHOOT
vs. CAPACITIVE LOAD
OUTPUT WAVEFORM WITH RISO
(CLOAD = 100pF, RISO = 6.2kΩ)
MAX9910 toc30
MAX9910 toc29
4.0
AV = 1V/V
3.5
RL = 1MΩ
AV = 1V/V
IN+
50mV/div
3.0
OVERSHOOT (%)
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
2.5
RL = 100kΩ
2.0
1.5
OUTPUT
50mV/div
1.0
RL = 10kΩ
0.5
0
0
20
40
60
80
100
20µs/div
CLOAD (pF)
OUTPUT WAVEFORM WITHOUT RISO
(CLOAD = 100pF)
MAX9910 toc31
AV = 1V/V
IN+
50mV/div
OUTPUT
50mV/div
20µs/div
8
_______________________________________________________________________________________
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
PIN
NAME
FUNCTION
MAX9911
(WLP)
MAX9910
MAX9911
(SC70)
MAX9912
MAX9913
A1
1
1
—
—
IN+
Noninverting Amplifier Input
A2
2
2
4
4
VSS
Negative Supply Voltage
Inverting Amplifier Input
B1
3
3
—
—
IN-
C1
4
4
—
—
OUT
Amplifier Output
B2
5
6
8
10
VDD
Positive Supply Voltage
C2
—
5
—
—
SHDN
Shutdown
—
—
—
1
1
OUTA
Amplifier Output Channel A
—
—
—
2
2
INA-
—
—
—
3
3
INA+
—
—
—
—
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 GBW to supply current,
low operating supply voltage, low input bias current,
and rail-to-rail inputs and outputs, the MAX9910–
MAX9913 are an excellent choice for precision or general-purpose, low-current, low-voltage, battery-powered
applications. These CMOS devices consume an ultralow 4µA (typ) supply current and a 200µV (typ) offset
voltage. For additional power conservation, the
MAX9911/MAX9913 feature a low-power shutdown
mode that reduces supply current to 1nA (typ), and
puts the amplifiers’ output in a high-impedance state.
These devices are unity-gain stable with a 200kHz
GBW product, driving capacitive loads up to 30pF. The
capacitive load can be increased to 250pF when the
amplifier is configured for a 10V/V gain.
Rail-to-Rail Inputs and Outputs
All of the MAX9910–MAX9913 amplifiers 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.
The MAX9910–MAX9913 are capable of driving the output to within 5mV of both supply rails with a 100kΩ
Inverting Amplifier Input Channel A
Noninverting Amplifier Input Channel A
Amplifier Output Channel B
load. These devices can drive a 5kΩ load with swings
to within 60mV of the rails. Figure 1 shows the output
voltage swing of the MAX9910–MAX9913 configured as
a unity-gain buffer powered from a single 3V supply.
Low Input Bias Current
The MAX9910–MAX9913 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 MAX9910–MAX9913 amplifiers are unity-gain stable for loads up to 30pF. However, the capacitive load
can be increased to 250pF 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 (approximately 5kΩ), the capacitive
load can be increased up to 200pF.
Power-Supply Considerations
The MAX9910–MAX9913 are optimized for single 1.8V
to 5.5V supply operation. A high amplifier power-supply
_______________________________________________________________________________________
9
MAX9910–MAX9913
Pin Description
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
rejection ratio of 95dB (typ) allows the devices to be
powered directly from a battery, simplifying design and
extending battery life.
Power-Up Settling Time
The MAX9910–MAX9913 typically require 5µs 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 18µs for VDD = 3V (see the Typical Operating
Characteristics for power-up settling time).
Shutdown Mode
The MAX9911/MAX9913 feature active-low shutdown
inputs. The MAX9911/MAX9913 enter shutdown in 2µs
(typ) and exit in 30µs (typ). The amplifiers’ outputs are
in a high-impedance state in shutdown mode. Drive
SHDN low to enter shutdown. Drive SHDN high to
enable the amplifier. The MAX9913 dual-amplifier features separate shutdown inputs. Shut down both amplifiers for the lowest quiescent current.
RAIL-TO-RAIL OUTPUT VOLTAGE RANGE
3V
IN_
1V/div
0V
3V
OUT_
1V/div
0V
200µs/div
Figure 1. Rail-to-Rail Output Voltage Range
RISO
MAX9910–
MAX9913
RL
Power-Supply Bypassing and Layout
To minimize noise, bypass VDD with a 0.1µF capacitor
to ground, as close to the pin as possible.
Good layout techniques optimize performance
by decreasing the amount of stray capacitance and
inductance to the op amps’ inputs and outputs.
Minimize stray capacitance and inductance by placing
external components close to the IC.
AV =
CL
RL
≈ 1V/V
RL + RISO
Figure 2. Using a Resistor to Isolate a Capacitive Load from
the Op Amp
5.5V
0V
IN-
VDD
100kΩ
MAX991_
IN+
VSS
100kΩ
Figure 3. Power-Up Test Configuration
10
______________________________________________________________________________________
OUT
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
TOP VIEW
MAX9911
IN+
VSS
A1
A2
IN-
VDD
B1
B2
OUT
SHDN
C1
C2
MAX9910
IN+
1
MAX9911
5
VDD
VSS 2
IN- 3
WLP BUMP
SIDE DOWN
4
OUT
SHDN
1
6
VDD
VSS 2
5
SHDN
IN- 3
4
OUT
SC70
SC70
MAX9912
OUTA
IN+
MAX9913
1
8
VDD
INA- 2
7
OUTB
INA+ 3
6
INB-
VSS 4
5
SOT23
INB+
OUTA
1
10 VDD
INA-
2
9
OUTB
INA+ 3
8
INB-
7
INB+
6
SHDNB
VSS 4
SHDNA 5
SHDNA
SHDNB
µMAX
Chip Information
PROCESS: BiCMOS
______________________________________________________________________________________
11
MAX9910–MAX9913
Pin Configurations
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.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
6 WLP
W61B1+1
21-0217
—
8 SOT23
K8+5
21-0078
90-0176
10 µMAX
U10+2
21-0061
90-0330
SC70, 5L.EPS
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
PACKAGE OUTLINE, 5L SC70
21-0076
12
______________________________________________________________________________________
E
1
1
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
______________________________________________________________________________________
13
MAX9910–MAX9913
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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.
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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.
14
______________________________________________________________________________________
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
MARKING
0
0
PACKAGE OUTLINE, SOT-23, 8L BODY
21-0078
J
1
______________________________________________________________________________________
1
15
MAX9910–MAX9913
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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 Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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.
10LUMAX.EPS
MAX9910–MAX9913
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
α
α
16
______________________________________________________________________________________
200kHz, 4µA, Rail-to-Rail
I/O Op Amps with Shutdown
REVISION
NUMBER
REVISION
DATE
2
10/10
DESCRIPTION
Added WLP package
PAGES
CHANGED
1, 2, 9, 11
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
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX9910–MAX9913
Revision History
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