19-4753; Rev 5; 7/11
EVALUATION KIT
AVAILABLE
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
General Description
The MAX9617–MAX9620 are low-power, zero-drift operational amplifiers available in space-saving SC70 packages. They are designed for use in portable consumer,
medical, and industrial applications.
The MAX9617–MAX9620 feature rail-to-rail CMOS inputs
and outputs, a 1.5MHz GBW at just 59FA supply current
and 10FV (max) zero-drift input offset voltage over time
and temperature. The zero-drift feature reduces the high
1/f noise typically found in CMOS input operational amplifiers, making it useful for a wide variety of low-frequency
measurement applications.
The MAX9617 and MAX9619 are available in a spacesaving, 2mm x 2mm, 6-pin SC70 package. The MAX9619
features a power-saving shutdown mode. The MAX9618
is available in a 2mm x 2mm, 8-pin SC70 package. The
MAX9620 is available in a 2mm x 2mm, 5-pin SC70
package. All devices are specified over the -40NC to
+125NC automotive operating temperature range.
Features
Low 59µA Quiescent Current
S
Very-Low 10µV (max) Input Offset Voltage
S
Dual Version Available in an 8-Pin SC70 Package
S
Low Input Noise
S
42nV/√Hz at 1kHz
0.42µV
Rail-to-Rail Inputs and Outputs
S
1.5MHz GBW
S
Ultra-Low 10pA Input Bias Current
S
Single 1.8V to 5.5V Supply Voltage Range
S
Unity-Gain Stable
S
Power-Saving Shutdown Mode (MAX9619)
S
Available in Tiny 5-Pin SC70 (MAX9620), 6-Pin
S
SC70 (MAX9617/MAX9619), and 8-Pin SC70
(MAX9618) Packages
from 0.1Hz to 10Hz
P-P
MAX9617–MAX9620
Applications
Sensor Interfaces
Loop-Powered Systems
Portable Medical Devices
Battery-Powered Devices
Cardiac Monitors
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX9617AXT+
MAX9618AXA+
MAX9619AXT+
MAX9620AXK+
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
+Denotes a lead(Pb)-free/RoHS-compliant package.
6 SC70
8 SC70
6 SC70
5 SC70
Functional Diagrams
TOP VIEW
IN+
GND
MAX9617
1
2
IN-
3
+
-
V
6
5
4
V
OUT
OUTA
DD
INA-
DD
INA+
GND
MAX9618
1
-
2
+
3
4
8
7
6
-
+
5
V
DD
OUTB
INB-
INB+
IN+
GND
IN-
MAX9619
1
2
3
+
-
6
5
4
V
DD
SHDN
OUT
IN+
GND
IN-
MAX9620
1
2
3
+
-
V
5
DD
4
OUT
_______________________________________________________________ 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.
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
ABSOLUTE MAXIMUM RATINGS
IN+, IN-, SHDN, (VDD to GND) ............................... -0.3V to +6V
OUT to GND ............................................. -0.3V to (VDD + 0.3V)
Short-Circuit Duration to Either Supply Rail,
OUT, OUTA, OUTB ............................................................ 10s
Continuous Input Current (any pins) ............................... ±20mA
Continuos Power Dissipation (TA = +70NC)
5-Pin SC70 (derate 3.1mW/NC above +70NC) .............247mW
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 = +3.3V, V
are at +25NC.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
MAX9617–MAX9620
Supply Voltage Range V
Supply Current
(per Amplifier)
Power-Supply Rejection Ratio
(Note 2)
Power-Up Time t
Shutdown Supply Current
Turn-On Time from Shutdown
(MAX9619)
DC SPECIFICATIONS
Input Offset Voltage (Note 2) V
Input Offset Voltage Drift (Note 2)
Input Bias Current (Note 2) I
Input Offset Current I
Input Common-Mode Range V
Common-Mode Rejection Ratio
(Note 2)
Open-Loop Gain (Note 2) AV
GND
= 0V, V
IN+
= V
= VDD/2, RL = 100kI to VDD/2, TA = -40NC to +125NC, unless otherwise noted. Typical values
IN-
Guaranteed by PSRR, 0NC P TA P +70NC
DD
Guaranteed by PSRR, -40NC P TA P +125NC
I
PSRR
I
SHDN
t
OSD
DV
CMRR
TA = +25NC
DD
-40NC P TA P +125NC
VDD = 1.8V to 5.5V
0NC P TA P +70NC, VDD = 1.6V to 5.5V
VDD = 0V to 3V step, AV = 1V/V 20
ON
MAX9619 only 300 nA
VDD = 3.3V, V
TA = +25NC
OS
-40NC P TA P +125NC
OS
TA =+25NC
-40NC P TA P +85NC
B
-40NC P TA P +125NC
OS
Guaranteed by
CM
CMRR test
-0.1V P VCM P VDD + 0.1V, TA = +25NC
-0.1V P VCM P VDD + 0.05V,
-40NC P TA P +125NC
20mV P V
RL = 100kI to VDD/2
OL
150mV P V
RL = 5kI to VDD/2
OUT
OUT
6-Pin SC70 (derate 3.1mW/NC above +70NC) ..........245.4mW
8-Pin SC70 (derate 3.1mW/NC above +70NC) .............245mW
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature .....................................................+150NC
Storage Temperature Range ............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
1.6 5.5
1.8 5.5
59 78
111
TA = +25NC
-40NC P TA P +125NC
= 0V to 3.3V step
SHDN
TA = +25NC
-40NC P TA P +125NC
P VDD - 20mV,
P VDD - 150mV,
119 135
107
116 135
50
0.8 10
25
5 120
31 80
95
580
5 pA
-0.1 VDD + 0.1
-0.1 VDD + 0.05
122 135
116
120 138
123 160
V
FA
dB
Fs
Fs
FV
nV/NC
pA
V
dB
dB
2 ______________________________________________________________________________________
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +3.3V, V
are at +25NC.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Resistance R
Output-Voltage Swing
Short-Circuit Current I
AC SPECIFICATIONS
Gain-Bandwidth Product GBWP 1.5 MHz
Slew Rate SR
Input Voltage-Noise Density e
Input Voltage Noise
Input Current-Noise Density i
Phase Margin CL = 20pF 60 Degrees
Capacitive Loading C
Crosstalk f = 10kHz (MAX9618) -100 dB
LOGIC INPUT (MAX9619)
Shutdown Input Low V
Shutdown Input High V
Shutdown Input Leakage Current IIL/I
Note 1: Specifications are 100% tested at TA = +25NC (exceptions noted). All temperature limits are guaranteed by design.
Note 2: Guaranteed by design.
GND
= 0V, V
IN+
= V
= VDD/2, RL = 100kI to VDD/2, TA = -40NC to +125NC, unless otherwise noted. Typical values
IN-
Differential 50
IN
Common mode 200
RL = 100kI to VDD/2
V
OH
VDD - V
OUT
RL = 5kI to VDD/2
RL = 600I to VDD/2
50
RL = 100kI to VDD/2
V
SC
OL
V
OUT
RL = 5kI to VDD/2
RL = 600I to VDD/2
50
150 mA
0V P V
f = 1kHz 42
n
OUT
P 2V
0.1Hz P f P 10Hz
f = 1kHz 100
n
No sustained oscillation, AV = 1V/V 400 pF
L
IL
IH
IH
1.3 V
0.7
0.42
1 100 nA
12
22
11
18
0.5 V
MI
mV
V/Fs
nV/√Hz
FV
P-P
fA/√Hz
MAX9617–MAX9620
Typical Operating Characteristics
(VDD = +3.3V, V
= 0V, outputs have RL = 100kI connected to VDD/2. TA = +25NC, unless otherwise specified.)
GND
INPUT OFFSET VOLTAGE
DRIFT HISTOGRAM
-0.03
OFFSET VOLTAGE DRIFT (FV/NC)
MAX9617 toc02
0.01 0.02 0.03 0.04-0.02 -0.01 0
25
20
15
10
FREQUENCY (%)
5
0
0
OFFSET VOLTAGE HISTOGRAM
OFFSET VOLTAGE (FV)
20
MAX9617 toc01
4321
18
16
14
12
10
8
FREQUENCY (%)
6
4
2
0
_______________________________________________________________________________________ 3
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Typical Operating Characteristics (continued)
(VDD = +3.3V, V
= 0V, outputs have RL = 100kI connected to VDD/2. TA = +25NC, unless otherwise specified.)
GND
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9617 toc03
100
90
80
70
60
50
40
30
SUPPLY CURRENT (FA)
20
10
120
100
80
60
40
SUPPLY CURRENT (FA)
20
MAX9617–MAX9620
0
1.6 5.6
TA = +125NC
TA = +25NC
TA = -40NC
5.14.64.13.63.12.62.1
SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
6
5
4
(FV)
3
OS
V
2
1
0
-50 125
TEMPERATURE (NC)
1007550250-25
300
250
MAX9617 toc06
200
150
100
INPUT BIAS CURRENT (pA)
50
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
140
120
100
CMRR (dB)
80
60
40
-50 125
TEMPERATURE (NC)
1007550250-25
MAX9617 toc09
140
120
100
80
PSRR (dB)
60
40
20
SUPPLY CURRENT
vs. TEMPERATURE
0
-50 125
TEMPERATURE (NC)
1007525 500-25
INPUT BIAS CURRENT
vs. INPUT COMMON MODE
NONINVERTING INPUT
0
-0.1 3.4
INVERTING INPUT
2.92.41.91.40.90.4
INPUT COMMON MODE (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0
0.1 10M
FREQUENCY (Hz)
1M100k10k1k100101
MAX9617 toc04
MAX9617 toc07
MAX9617 toc10
INPUT OFFSET VOLTAGE
vs. INPUT COMMON MODE
6
5
4
(FV)
3
OS
V
TA = +25NC
2
1
0
-0.1 3.4
TA = -40NC
INPUT COMMON MODE (V)
T
A
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
140
120
100
80
60
CMRR (dB)
40
20
0
0.1 10M
FREQUENCY (Hz)
OUTPUT-VOLTAGE SWING HIGH
vs. TEMPERATURE
0.40
0.38
0.36
0.34
0.32
(mV)
0.30
OH
V
0.28
0.26
0.24
0.22
0.20
-50 125
TEMPERATURE (NC)
MAX9617 toc05
= +125NC
2.92.41.91.40.90.4
MAX9617 toc08
1M100k10k1k100101
MAX9617 toc11
1007525 500-25
4 ______________________________________________________________________________________
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Typical Operating Characteristics (continued)
(VDD = +3.3V, V
= 0V, outputs have RL = 100kI connected to VDD/2. TA = +25NC, unless otherwise specified.)
GND
MAX9617–MAX9620
OUTPUT-VOLTAGE SWING LOW
vs. TEMPERATURE
0.40
0.38
0.36
0.34
0.32
(mV)
0.30
OL
V
0.28
0.26
0.24
0.22
0.20
-50 125
TEMPERATURE (NC)
INPUT VOLTAGE 0.1Hz TO 10Hz NOISE
OPEN-LOOP GAIN vs. FREQUENCY
160
140
MAX9617 toc12
120
100
80
60
40
OPEN LOOP GAIN (dB)
20
0
-20
1007525 500-25
-40
-10m 1M 10M
FREQUENCY (Hz)
100k10k100 1k110100m
MAX9617 toc13
INPUT VOLTAGE NOISE vs. FREQUENCY
10,000
1000
100
INPUT VOLTAGE NOISE (nV/√Hz)
10
0.1 100k
FREQUENCY (Hz)
MAX9617 toc14
10k1k100101
INPUT CURRENT NOISE
MAX9617 toc15
0.1FV/div
1000
100
vs. FREQUENCY
MAX9617 toc16
SMALL-SIGNAL GAIN
vs. FREQUENCY
5
0
-5
-10
-15
-20
SMALL-SIGNAL GAIN (dB)
-25
-30
-35
10 10M
FREQUENCY (kHz)
_______________________________________________________________________________________ 5
1s/div
100mV
1M100k100 1k 10k
INPUT CURRENT NOISE (fA/√Hz)
10
LARGE-SIGNAL GAIN
vs. FREQUENCY
P-P
10
MAX9617 toc17
0
-10
-20
-30
LARGE-SIGNAL GAIN (dB)
-40
-50
10 10M
FREQUENCY (kHz)
110 100 1k
0.1 10k
FREQUENCY (Hz)
SMALL-SIGNAL STEP RESPONSE
vs. TIME
2V
P-P
MAX9617 toc18
1M100k10k1k100
100Fs/div
MAX9617 toc19
100mV
P-P
50mV/div
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Typical Operating Characteristics (continued)
(VDD = +3.3V, V
LARGE-SIGNAL STEP RESPONSE
= 0V, outputs have RL = 100kI connected to VDD/2. TA = +25NC, unless otherwise specified.)
GND
CAPACITIVE LOAD
vs. TIME
MAX9617 toc20
100mV
P-P
10,000
vs. ISOLATION RESISTOR
VIN = 100mV
AV = 1V/V
P-P
MAX9617 toc21
POWER-UP TIME
MAX9617 toc22
SHDN
1V/div
500mV/div
100Fs/div
MAX9617–MAX9620
1000
UNSTABLE
CAPACITENCE (pF)
100
0.1 1000
ISOLATION RESISTOR (I)
100101
20Fs/div
Pin Configurations
TOP VIEW
IN+
GND
+
1
2
MAX9617
IN-
3
6
5
4
V
V
OUT
OUTA
DD
DD
SC70
INA-
INA+
GND
+
1
2
MAX9618
3
4
V
8
DD
7
OUTB
INB-
6
5
INB+
SC70
IN+
GND
IN-
+
1
2
MAX9619
3
V
6
DD
5
SHDN
4
OUT
SC70
IN+
GND
IN-
+
1
2
MAX9620
3
SC70
Pin Description
PIN
MAX9617 MAX9618 MAX9619 MAX9620
1 — 1 1 IN+ Positive Input
2 4 2 2 GND Ground
3 — 3 3 IN- Negative Input
4 — 4 4 OUT Output
5, 6 8 6 5 V
— — 5 —
— 1 — — OUTA Channel A Output
— 2 — — INA- Channel A Negative Input
— 3 — — INA+ Channel A Positive Input
— 5 — — INB+ Channel B Positive Input
— 6 — — INB- Channel B Negative Input
— 7 — — OUTB Channel B Output
NAME FUNCTION
Positive Supply Voltage. Bypass to GND with a 0.1FF capacitor.
DD
SHDN
Shutdown. Pull shutdown low to activate shutdown mode.
OUT
1V/div
V
5
DD
4
OUT
6 ______________________________________________________________________________________
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Detailed Description
The MAX9617–MAX9620 are precision, low-power op
amps ideal for signal processing applications. The
MAX9617, MAX9619, and MAX9620 are single-channel
devices. The MAX9618 is a dual-channel device. These
devices use an innovative autozero technique that allows
precision and low noise with a minimum amount of
power. The low input offset voltage, CMOS inputs, and
the absence of 1/f noise allows for optimization of active
filter designs.
The MAX9617–MAX9620 achieve rail-to-rail performance
at the input through the use of a low-noise charge pump.
This ensures a glitch-free, common-mode input voltage
range extending from the negative supply rail up to
the positive supply rail, eliminating crossover distortion
common to traditional n-channel/p-channel CMOS pair
inputs, reducing harmonic distortion at the output.
The MAX9619 features a shutdown mode that greatly reduces quiescent current when the device is not operational.
Autozero
The MAX9617–MAX9620 feature an autozero circuit that
allows the device to achieve less than 10FV (max) of
input offset voltage and eliminates the 1/f noise.
Internal Charge Pump
An internal charge pump provides an internal supply typically 1V beyond the upper rail. This internal rail allows the
MAX9617–MAX9620 to achieve true rail-to-rail inputs and
outputs, while providing excellent common-mode rejection, power-supply rejection ratios, and gain linearity.
The charge pump requires no external components, and
in most applications is entirely transparent to the user.
The operating frequency is well beyond the unity-gain
frequency of the amplifier, avoiding aliasing or other sig-
MAX9617–MAX9620
nal integrity issues in sensitive applications.
Shutdown Operation
The MAX9619 features an active-low shutdown mode
that lowers the quiescent current to less than 300nA. In
shutdown mode, the inputs and output are high impedance. This allows multiple devices to be multiplexed
onto a single line without the use of external buffers. Pull
SHDN high for normal operation.
The shutdown high (VIH) and low (VIL) threshold voltages
are designed for ease of integration with digital controls like microcontroller outputs. These thresholds are
independent of supply, eliminating the need for external
pulldown circuitry.
Applications Information
The MAX9617–MAX9620 low-power, low-noise, and
precision operational amplifiers are designed for applications in the portable medical, such as ECG and pulse
oximetry, portable consumer, and industrial markets.
The MAX9617–MAX9620 are also ideal for loop-powered
systems that interface with pressure sensors or strain
gauges.
Capacitive-Load Stability
Driving large capacitive loads can cause instability in
many op amps. The MAX9617–MAX9620 are stable
with capacitive loads up to 400pF. Stability with higher
capacitive loads can be improved by adding an isolation
resistor in series with the op-amp output. This resistor
improves the circuit’s phase margin by isolating the load
capacitor from the amplifier’s output. The graph in the
Typical Operating Characteristics gives the stable operation region for capacitive load versus isolation resistors.
V
IN
+5V
MAX9617
Figure 1. Typical Application Circuit: Sallen-Key Active Lowpass Filter
_______________________________________________________________________________________ 7
ADC
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Power Supplies and Layout
The MAX9617–MAX9620 operate either with a single
supply from +1.6V to +5.5V with respect to ground or
with dual supplies from Q0.8V to Q2.75V. When used with
dual supplies, bypass both supplies with their own 0.1FF
capacitor to ground. When used with a single supply,
bypass VDD with a 0.1FF capacitor to ground.
MAX9617–MAX9620
Careful layout technique helps optimize performance by
decreasing the amount of stray capacitance at the op
amp’s inputs and outputs. To decrease stray capacitance, minimize trace lengths by placing external components close to the op amp’s pins.
Chip Information
PROCESS: BiCMOS
8 ______________________________________________________________________________________
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Package Information
For the latest package outline information and land patterns (footprints), 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
6 SC70 X6SN+1
8 SC70 X8C+1
21-0076 90-0188
21-0077 90-0189
21-0460 90-0348
MAX9617–MAX9620
_______________________________________________________________________________________ 9
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Package Information (continued)
For the latest package outline information and land patterns (footprints), 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.
MAX9617–MAX9620
10 _____________________________________________________________________________________
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Package Information (continued)
For the latest package outline information and land patterns (footprints), 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.
MAX9617–MAX9620
______________________________________________________________________________________ 11
Single/Dual SC70, Zero-Drift,
High-Efficiency, 1.5MHz Op Amps with RRIO
Revision History
REVISION
NUMBER
0 7/09 Initial release —
1 9/09 Removed references to MAX9617 shutdown functionality 1, 2, 3, 6, 7
2 2/10
3 6/10
4 2/11 Updated bias current specifications 2
5 7/11 Updated input and shutdown specs in the Absolute Maximum Ratings 2
REVISION
DATE
Removed future product reference for the MAX9618, and added MAX9619 and
MAX9620 to the data sheet
Corrected General Description to show that only the MAX9619 has shutdown,
corrected the MAX9617 Pin Configuration, and added soldering temperature
MAX9617–MAX9620
DESCRIPTION
PAGES
CHANGED
1–11
1, 2, 12
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.
12 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
©
2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
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