19-5200; Rev 3; 10/11
TION KIT
EVALUA BLE
AVAILA
36V, Precision, Low-Noise,
Wide-Band Amplifier
General Description
Features
S
0.94nV/√Hz Ultra-Low Input Voltage Noise
S
Very Fast 600ns Settling Time to 16-Bit Accuracy
S
THD of -128dB at 10kHz
S
Low Input Offset Voltage 125µV (max)
S
Low Input Offset Temperature Drift 0.5µV/°C (max)
S
Gain-Bandwidth Product 55MHz
S
+4.5V to +36V Wide Supply Range
S
Rail-to-Rail Output
S
Unity-Gain Stable
S
8-Pin SO and TDFN Packages
S
ESD 8kV HBM and 1kV CDM
MAX9632
The MAX9632 is a low-noise, precision, wide-band
operational amplifier that can operate in a very wide
+4.5V to +36V supply voltage range. The IC operates in
dual (±18V) mode.
The exceptionally fast settling time and low distortion
make the IC an excellent solution for precision acquisi-
tion systems. The rail-to-rail output swing maximizes the
dynamic range when driving high-resolution 24-bit Σ∆
ADCs even with low supply voltages.
The IC achieves 55MHz of gain-bandwidth product and
ultra-low 0.94nV/√Hz input voltage noise with only 3.9mA
of quiescent current.
The IC is offered in 8-pin SO, µMAX
M
, and TDFN pack-
ages and is rated for operation over the -40NC to +125NC
temperature range.
Applications
High-Resolution ADC Drivers
High-Resolution DAC Buffers
Medical Imaging
Low-Noise Signal Processing
Test and Measurement Systems
ATE
µMAX is a registered trademark at Maxim Integrated Products, Inc.
PART
MAX9632ASA+
MAX9632ATA+
MAX9632AUA+
Ordering Information
TEMP RANGE
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
PIN-
PACKAGE
8 SO
8 TDFN-EP*
8 µMAX
TOP
MARK
—
BML
—
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
INPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY
MAX9632 toc12
TOTAL HARMONIC DISTORTION
vs. OUTPUT VOLTAGE
TOTAL HARMONIC DISTORTION (THD)
-90
-100
-110
-120
-130
-140
-150
-160
0.1
1
OUTPUT VOLTAGE (V)
10
f = 1kHz
f = 10kHz
MAX9632 toc23
1.8
INPUT-VOLTAGE NOISE DENSITY (nV/
√
Hz)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
10
100
1k
FREQUENCY (Hz)
10k
-80
100k
_______________________________________________________________
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.
36V, Precision, Low-Noise,
Wide-Band Amplifier
MAX9632
ABSOLUTE MAXIMUM RATINGS
V
CC
to V
EE
............................................................-0.3V to +40V
All Other Pins..................................(V
EE
- 0.3V) to (V
CC
+ 0.3V)
Short-Circuit (GND) Duration, OUT ....................................... 10s
Continuous Input Current (any pin).................................
Q20mA
Continuous Power Dissipation (T
A
= +70NC) (Note 1)
Multilayer SO (derate 7.4mW/NC above +70NC) .........588mW
Multilayer TDFN (derate 23.8mW/NC above +70NC) ...1905mW
Multilayer µMAX (derate 4.8mW/NC above +70NC) ..387.8mW
ESD Protection
HBM
..............................................................................................
8kV
CDM................................................................................... 1kV
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature .....................................................+150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
6 TDFN
Junction-to-Ambient Thermal Resistance (q
JA
) ..........42°C/W
Junction-to-Case Thermal Resistance (q
JC
) .................8°C/W
8 SO
Junction-to-Ambient Thermal Resistance (q
JA
) ........136°C/W
Junction-to-Case Thermal Resistance (q
JC
) ...............38°C/W
8 µMAX
Junction-to-Ambient Thermal Resistance (q
JA
) .....206.3°C/W
Junction-to-Case Thermal Resistance (q
JC
) ...............42°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(V
CC
= 15V, V
EE
= -15V, R
L
= 10kI to V
GND
, V
IN+
= V
IN-
= V
GND
= 0V, V
SHDN
= V
GND
, T
A
= -40NC to +125NC. Typical values are
at T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
POWER SUPPLY
Supply Voltage Range
Supply Current
Power-Supply Rejection Ratio
SHUTDOWN
Device disabled
Shutdown Input Voltage
V
SHDN
Device enabled
Shutdown Current
DC SPECIFICATIONS
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Common-Mode Range
V
OS
QDV
OS
I
B
I
OS
V
CM
Guaranteed by CMRR
V
EE
+
1.8
T
A
= +25NC
-40NC
P
T
A
P
+125NC
(Note 3)
0.15
30
15
30
125
165
0.5
180
100
V
CC
-
1.4
FV
FV/NC
nA
nA
V
I
SHDN
V
SHDN
= V
CC
V
CC
- 0.35
V
EE
1
V
CC
V
CC
- 3.0
15
V
V
CC
I
CC
PSRR
T
A
= +25NC
-40NC
P
T
A
P
+125NC
125
120
Guaranteed by PSRR
4.5
3.9
140
36
6.5
V
mA
dB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FA
2
______________________________________________________________________________________
36V, Precision, Low-Noise,
Wide-Band Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 15V, V
EE
= -15V, R
L
= 10kI to V
GND
, V
IN+
= V
IN-
= V
GND
= 0V, V
SHDN
= V
GND
, T
A
= -40NC to +125NC. Typical values are
at T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
Common-Mode Rejection Ratio
SYMBOL
CMRR
CONDITIONS
V
EE
+ 1.8V
P
V
CM
P
V
CC
- 1.4V, T
A
= +25NC
V
EE
+ 1.8V
P
V
CM
P
V
CC
- 1.4V,
-40NC
P
T
A
P
+125NC
V
EE
+ 0.2V
P
V
OUT
P
V
CC
- 0.2V, R
L
= 10kI
V
EE
+ 0.6V
P
V
OUT
P
V
CC
- 0.6V, R
L
= 600I
V
CC
- V
OUT
V
OUT
- V
EE
T
A
= +25NC
R
L
= 10kI
R
L
= 600I
RL = 10kI
RL = 600I
MIN
120
110
125
120
140
135
50
150
50
150
56
55
0
P
V
OUT
P
5V
To 0.0015%, V
OUT
= 10V
P-P
, C
L
= 100pF,
AV = 1V/V
f = 1kHz, V
OUT
= 3V
RMS
, R
L
= 600I, AV
= 1V/V
f = 10kHz, V
OUT
= 3V
RMS
, R
L
= 600I, AV
= 1V/V
f = 1kHz
0.1Hz
P
f
P
10Hz
i
N
C
L
f = 1kHz
No sustained oscillation, AV = 1V/V
30
600
-136
dB
-128
0.94
65
3.75
350
nV/√Hz
nV
P-P
pA/√Hz
pF
150
400
150
400
mA
MHz
V/Fs
ns
mV
TYP
135
dB
MAX
UNITS
MAX9632
Large-Signal Gain
A
VOL
V
OH
dB
Output Voltage Swing
VOL
Short-Circuit Current
AC SPECIFICATIONS
Gain-Bandwidth Product
Slew Rate
Settling Time
GBWP
SR
t
S
I
SC
Total Harmonic Distortion
THD
Input-Voltage Noise Density
Input Voltage Noise
Input-Current Noise Density
Capacitive Loading
e
N
Note 2:
All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.
Note 3:
Guaranteed by design.
_______________________________________________________________________________________
3
36V, Precision, Low-Noise,
Wide-Band Amplifier
MAX9632
Typical Operating Characteristics
(V
CC
= 15V, V
EE
= -15V, R
L
= 10kI to V
GND,
V
IN+
= V
IN-
= V
GND
= 0V, V
SHDN
= V
GND
, T
A
= -40NC to +125NC. Typical values are at
T
A
= +25NC, unless otherwise noted.)
INPUT OFFSET VOLTAGE HISTOGRAM
MAX9632 toc01
INPUT OFFSET VOLTAGE TEMPERATURE
COEFFICIENT HISTOGRAM
MAX9632 toc02
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
4.8
4.6
SUPPLY CURRENT (mA)
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
MAX9632 toc03
35
30
OCCURANCE (%)
25
20
15
10
5
0
0
10
20
30
40
50
25
20
OCCURANCE (%)
15
10
5
0
0
5.0
60
20 40 60 80 100 120 140 160 180 200
INPUT OFFSET VOLTAGE TEMPERATURE
COEFFICIENT (nV/°C)
0
5
10
15
20
25
30
35
40
INPUT OFFSET VOLTAGE (µV)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. TEMPERATURE
MAX9632 toc04
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
-42
INPUT OFFSET VOLTAGE (µV)
-44
-46
-48
-50
-52
-54
-56
-58
T
A
= +125°C
-15
-10
-5
0
5
10
15
T
A
= +25°C
T
A
= 0°C
T
A
= +85°C
T
A
= -40°C
MAX9632 toc05
INPUT BIAS CURRENT
vs. INPUT COMMON-MODE VOLTAGE
-10
INPUT BIAS CURRENT (nA)
-20
-30
-40
-50
-60
-70
-15
-10
-5
T
A
= 0°C
T
A
= -40°C
0
5
10
15
T
A
= +85°C
T
A
= +25°C
T
A
= +125°C
MAX9632 toc06
5.0
4.8
4.6
SUPPLY CURRENT (mA)
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
-50
-25
0
25
50
75
100
-40
0
125
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX9632 toc07
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
POWER-SUPPLY REJECTION RATIO (dB)
0
-20
-40
-60
-80
-100
-120
-140
-160
1
10
100
1k
10k 100k 1M 10M 100M
MAX9632 toc08
OUTPUT VOLTAGE HIGH
vs. OUTPUT CURRENT (SOURCE)
15.0
OUTPUT VOLTAGE HIGH (V)
14.9
14.8
14.7
14.6
14.5
14.4
0
10
20
30
40
50
60
T
A
= -40°C
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= 0°C
MAX9632 toc09
20
COMMON-MODE REJECTION RATIO (dB)
0
-20
-40
-60
-80
-100
-120
-140
-160
1
10
100
1k
20
15.1
10k 100k 1M 10M 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
OUTPUT SOURCE CURRENT (mA)
4
______________________________________________________________________________________
36V, Precision, Low-Noise,
Wide-Band Amplifier
Typical Operating Characteristics (continued)
(V
CC
= 15V, V
EE
= -15V, R
L
= 10kI to V
GND,
V
IN+
= V
IN-
= V
GND
= 0V, V
SHDN
= V
GND
, T
A
= -40NC to +125NC. Typical values are at
T
A
= +25NC, unless otherwise noted.)
OUTPUT VOLTAGE LOW
vs. OUTPUT CURRENT (SINK)
MAX9632 toc10
MAX9632
OPEN-LOOP GAIN vs. FREQUENCY
MAX9632 toc11
INPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY
INPUT-VOLTAGE NOISE DENSITY (nV/
√
Hz)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
10
100
1k
FREQUENCY (Hz)
10k
100k
MAX9632 toc12
-14.55
-14.60
OUTPUT VOLTAGE LOW (V)
-14.65
-14.70
-14.75
-14.80
-14.85
-14.90
-14.95
-15.00
0
10
20
30
40
50
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
T
A
= +125°C
T
A
= 0°C
160
140
120
OPEN-LOOP GAIN (dB)
100
80
60
40
20
0
-20
1.8
60
1
10
100
1k
10k 100k 1M 10M 100M
OUTPUT SINK CURRENT (mA)
FREQUENCY (Hz)
0.1Hz TO 10Hz NOISE vs. TIME
MAX9632 toc13
INPUT-CURRENT NOISE DENSITY
vs. FREQUENCY
MAX9632 toc14
OUTPUT IMPEDANCE vs. FREQUENCY
60
OUTPUT IMPEDANCE (
I
)
50
40
30
20
10
MAX9632 toc15
25
INPUT CURRENT NOISE DENSITY (pA/
√
Hz)
20
15
10
5
0
70
20nV/div
10s/div
10
100
1k
FREQUENCY (Hz)
10k
100k
0
10
100
1k
10k
100k
1M
10M 100M
FREQUENCY (Hz)
INPUT SMALL-SIGNAL STEP RESPONSE
MAX9632 toc16
INPUT LARGE-SIGNAL STEP RESPONSE
MAX9632 toc17
STABILITY vs. CAPACITIVE AND
RESISTIVE LOAD PARALLEL
900
800
RESISTIVE LOAD (
I
)
700
600
500
400
300
200
100
0
STABLE
0
200
400
600
800
1000
1200
UNSTABLE
MAX9632 toc18
1000
INPUT
100mV/div
INPUT
2V/div
OUTPUT
50mV/div
OUTPUT
500mV/div
200ns/div
1µs/div
CAPACITIVE LOAD (pF)
_______________________________________________________________________________________
5
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