Rainbow Electronics MAX9618 User Manual
19-4753; Rev 1; 9/09
EVALUATION KIT
AVAILABLE
General Description
The MAX9617/MAX9618 are low-power, zero-drift operational amplifiers, designed for use in portable consumer,
medical, and industrial applications.
The MAX9617/MAX9618 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 of the MAX9617/
MAX9618 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 is available in a space-saving, 2mm x
2mm, 6-pin SC70 package. The MAX9618 is available
in a 2mm x 2mm, 8-pin SC70 package. All devices are
specified over the -40NC to +125NC automotive operating
temperature range.
High-Efficiency, 1.5MHz
Op Amps with RRIO
Features
Low 59µA Quiescent Current
S
Very-Low 10µV (max) Input Offset Voltage
S
Low Input Noise
S
42nV/√Hz at 1kHz
1µV
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
Available in Tiny 6-Pin SC70 (MAX9617) and 8-Pin
S
SC70 (MAX9618) Packages
from 0.1Hz to 10Hz
P-P
MAX9617/MAX9618
Applications
Sensor Interfaces
Loop-Powered Systems
Portable Medical Devices
Battery-Powered Devices
Cardiac Monitors
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX9617AXT+
MAX9618AXA+*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
-40NC to +125NC
-40NC to +125NC
6 SC70
8 SC70
Functional Diagrams
TOP VIEW
IN+
GND
MAX9617
1
2
IN-
3
+
-
V
6
DD
5
V
DD
4
OUT
OUTA
INA-
INA+
GND
MAX9618
1
-
2
+
3
4
V
8
DD
7
OUTB
INB-
6
-
+
5
INB+
_______________________________________________________________ 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.
High-Efficiency, 1.5MHz
Op Amps with RRIO
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VDD to GND) .................................-0.3V to +6V
All Other Pins, IN+ to IN- .............(GND - 0.3V) to (VDD + 0.3V)
Short-Circuit Duration to Either Supply Rail,
OUT, OUTA, OUTB ............................................................ 10s
Continuous Input Current (any pins) ............................... ±20mA
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/MAX9618
Supply Voltage Range V
Supply Current
(per Amplifier)
Power-Supply Rejection Ratio
(Note 2)
Power-Up Time t
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
DD
PSRR
ON
DV
OS
CMRR
TA = +25NC
-40NC P TA P +125NC
VDD = 1.8V to 5.5V
0NC P TA P +70NC, VDD = 1.6V to 5.5V
VDD = 0 to 3V step, AV = 1V/V 20
OS
CM
TA = +25NC
-40NC P TA P +125NC
OS
TA =+25NC
B
-40NC P TA P +125NC
Guaranteed by
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
Continuous Power Dissipation (TA = +70NC)
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
1.6 5.5
1.8 5.5
59 78
111
TA = +25NC
-40NC P TA P +125NC
TA = +25NC
-40NC P TA P +125NC
P VDD - 20mV,
P VDD - 150mV,
119 135
107
116 135
0.8 10
5 120
0.01 0.14
0.005
-0.1
-0.1
122 135
116
120 138
123 160
25
3.5
VDD +
0.1
VDD +
0.05
V
FA
dB
Fs
FV
nV/NC
nA
V
dB
dB
2 ______________________________________________________________________________________
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
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
OL
SC
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
0.7
1
12
22
11
18
MI
mV
V/Fs
nV/√Hz
FV
P-P
fA/√Hz
MAX9617/MAX9618
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
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