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MAX9939AUB+T

P1-P3P4-P6P7-P9P10-P12P13-P15
19-4329; Rev 3; 12/12
MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX9939 is a general-purpose, differential-input
programmable-gain amplifier (PGA) that is ideal for con-
ditioning a variety of wide dynamic range signals such
as those found in motor current-sense, medical instru-
mentation, and sonar data acquisition applications. It
features programmable differential gains from 0.2V/V to
157V/V, input offset-voltage compensation, and an out-
put amplifier that can be configured either as a high-
order active filter or to provide a differential output.
The PGA is optimized for high-signal bandwidth and its
gain can be programmed to be 0.2V/V, 1V/V, 10V/V,
20V/V, 30V/V, 40V/V, 60V/V, 80V/V, 119V/V, and 157V/V.
Precision resistor matching provides extremely low gain
tempco and high CMRR. Although the MAX9939 oper-
ates from a single supply V
CC
between 2.9V to 5.5V, it
can process signals both above and below ground due
to the use of an input level-shifting amplifier stage.
Furthermore, its inputs are protected to ±16V, allowing it
to withstand fault conditions and signal overranges.
The output amplifier is designed for high bandwidth
and low-bias currents, making it ideal for use in multi-
ple-feedback active filter topologies that offer much
higher Qs and stopband attenuation than Sallen-Key
architectures.
The MAX9939 draws 3.4mA of quiescent supply current
at 5V, and includes a software-programmable shut-
down mode that reduces its supply current to only
13µA. The MAX9939 is available in a 10-pin µMAX
®
package and operates over the -40°C to +125°C auto-
motive temperature range.
Applications
Sensorless Motor Control
Medical Signal Conditioning
Sonar and General Purpose Data Acquisition
Differential to Single-Ended Conversion
Differential-Input, Differential-Output Signal
Amplification
Sensor Interface and Signal Processing
Features
o SPI-Programmable Gains: 0.2V/V to 157V/V
o Extremely Low Gain Tempco
o Integrated Amplifier for R/C Programmable Active
Filter
o Input Offset-Voltage Compensation
o Input Protection to ±16V
o 13µA Software Shutdown Mode
o -40°C to +125°C Operating Temperature Range
o 10-Pin µMAX Package
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX9939AUB+ -40°C to +125°C 10 µMAX
MAX9939AUB/V+T -40°C to +125°C 10 µMAX
/V denotes an automotive-qualified part.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagram appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
1
2
3
4
5
10
9
8
7
6
V
CC
OUTA
INBINA-
GND
DIN
SCLK
MAX9939
µMAX
TOP VIEW
OUTBINA+
CS
+
Pin Configuration
MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
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.
V
CC
to GND..............................................................-0.3V to +6V
INB, OUTA, OUTB, SCLK, DIN, CS............-0.3V to (V
CC
+ 0.3V)
INA+, INA- to GND ..................................................-16V to +16V
Output Short-Circuit Current Duration........................Continuous
Continuous Input Current into Any Terminal.....................±20mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........707mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, V
GND
= 0V, V
INA+
= V
INA-
, Gain = 10V/V, R
OUTA
= R
OUTB
= 1kΩ to V
CC
/2, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PGA CHARACTERISTICS
Gain Error GE T
A
= +25°C, 0.2V ≤ V
OUTA
≤ V
CC
- 0.2V 0.05 0.38 %
Gain Temperature-Coefficient Tc-GE 2.2 17 ppm/°C
With no V
OS
trim, T
A
= +25°C 1.5 9
Input Offset Voltage (Note 2) V
OS-A
With no V
OS
trim, T
A
= T
MIN
to T
MAX
15
mV
Input Offset-Voltage Drift 10 µV/C
Input Offset-Voltage Trim Range ±17 mV
Input Common-Mode Range V
CM
Guaranteed by CMRR test (Note 3) -V
CC
/2
V
CC
- 2.2
V
-1V ≤ V
CM
≤ V
CC
- 2.2V 50 60
-V
CC
/2 ≤ V
CM
≤ V
CC
- 2.2V, T
A
= +25°C5060Common-Mode Rejection Ratio CMRR
-V
CC
/2 ≤ V
CM
≤ V
CC
- 2.2V 39
dB
Output Short-Circuit current I
SC
70 mA
Input-Voltage Noise Density V
N
f = 10kHz, gain = 157V/V 54 nV/√Hz
Gain = 0.2V/V
Gain = 1V/V
2.15
Gain-Bandwidth Product GBW
Gain = 157V/V 279
MHz
Slew Rate SR 9 V/µs
Settling Time t
S
To 1%, 2V output step 0.45 µs
Distortion THD f = 1kHz, V
OUTA
= 2.5V
P-P
89 dB
Max Capacitive Load C
L
(
MAX
)
1nF
Output Swing V
OH
, V
OL
Voltage output high = V
CC
- V
OUTA
,
voltage output low = V
OUTA
- V
GND
25 60 mV
OUTPUT AMPLIFIER CHARACTERISTICS
Input Bias Current Ib (Note 4) 1 pA
T
A
= +25°C 1.5 9
Input Offset Voltage (Note 2) V
OS-B
T
A
= T
MIN
to T
MAX
15
mV
Output Short-Circuit Current I
SC
70 mA
MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
3
Maxim Integrated
Note 1: All devices are 100% production tested at T
A
= +25°C. Temperature limits are guaranteed by design.
Note 2: The input offset voltage includes the effects of mismatches in the internal V
CC
/2 resistor dividers.
Note 3: For gain of 0.25V/V, the input common-mode range is -1V to V
CC
- 2V.
Note 4: The input current of a CMOS device is too low to be accurately measured on an ATE and is typically on the order of 1pA.
Note 5: Parts are functional with f
SCLK
= 10MHz.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V, V
GND
= 0V, V
INA+
= V
INA-
, Gain = 10V/V, R
OUTA
= R
OUTB
= 1kΩ to V
CC
/2, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Unity-Gain Bandwidth UGBW 2.2 MHz
Slew Rate SR 6.4 V/µs
Settling Time t
S
To 1%, 2V output step 0.86 µs
Input-Voltage Noise Density V
N
36 nV/√Hz
Distortion THD f = 1kHz, V
OUTA
= 2.5V
P-P
, gain = -1V/V 90 dB
Max Capacitive Load C
L
(
MAX
)
1nF
Output Swing V
OH
, V
OL
Voltage output high = V
CC
- V
OUTB
,
voltage output low = V
OUTB
- V
GND
25 60 mV
POWER SUPPLY
Supply Voltage Range V
CC
Guaranteed by PSRR 2.9 5.5 V
Power-Supply Rejection Ratio PSRR
1kΩ between OUTA and INB, 1kΩ between
OUTB and INB, measured differentially
between OUTA and OUTB
60 80 dB
Supply Current I
CC
OUTA and OUTB unloaded 3.4 6.7 mA
Shutdown Supply Current I
SHDN
Soft shutdown through SPI 13 24 µA
SPI CHARACTERISTICS
Input-Voltage Low V
IL
0.8 V
V
CC
= 5V 2.0
Input-Voltage High V
IH
V
CC
= 3.3V 1.65
V
Input Leakage Current I
IN
±1 µA
Input Capacitance C
IN
5pF
SPI TIMING CHARACTERISTICS
SCLK Frequency f
SCLK
(Note 5) 5 MHz
SCLK Period t
CP
200 ns
SCLK Pulse-Width High t
CH
80 ns
SCLK Pulse-Width Low t
CL
80 ns
CS Fall to SCLK Rise Setup t
CSS
80 ns
CS Fall to SCLK Rise Hold t
CSH
20 + (0.5
x t
CP
)
ns
DIN to SCLK Setup t
DS
55 ns
DIN Hold after SCLK t
DH
0ns
SCLK Rise to CS Fall Delay t
CS0
20 ns
CS Rise to SCLK Rise Hold t
CS1
80 ns
CS Pulse-Width High t
CSW
200 ns
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX9939AUB+T

Mfr. #:
Buy MAX9939AUB+T
Manufacturer:
Maxim Integrated
Description:
Special Purpose Amplifiers SPI-Programmable Gain Amplifier
Lifecycle:
New from this manufacturer.
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