MAX9939EVKIT+ Maxim Integrated Products, MAX9939EVKIT+ Datasheet

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MAX9939EVKIT+

Manufacturer Part Number
MAX9939EVKIT+
Description
KIT EVAL FOR MAX9939
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX9939EVKIT+

Channels Per Ic
2 - Dual
Amplifier Type
Programmable Gain
Output Type
Differential
Slew Rate
9 V/µs
Current - Output / Channel
70mA
Operating Temperature
-40°C ~ 125°C
Current - Supply (main Ic)
3.4mA
Voltage - Supply, Single/dual (±)
2.9 V ~ 5.5 V
Board Type
Fully Populated
Utilized Ic / Part
MAX9939
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
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 SPI™-programmable differential gains from
0.2V/V to 157V/V, input offset-voltage compensation, and
an output 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
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.
19-4329; Rev 2; 12/10
SPI is a trademark of Motorola, Inc.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Functional Diagram appears at end of data sheet.
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.
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
________________________________________________________________ Maxim Integrated Products
with Input V
General Description
CC
between 2.9V to 5.5V, it
SPI Programmable-Gain Amplifier
Applications
OS
®
Trim and Output Op Amp
o SPI-Programmable Gains: 0.2V/V to 157V/V
o Extremely Low Gain Tempco
o Integrated Amplifier for R/C Programmable Active
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
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX9939AUB+
Filter
TOP VIEW
PART
SCLK
INA+
GND
INA-
DIN
-40°C to +125°C
1
2
3
4
5
TEMP RANGE
Ordering Information
+
MAX9939
µMAX
Pin Configuration
10
9
8
7
6
CS
V
OUTA
INB
OUTB
PIN-PACKAGE
CC
Features
10 µMAX
1

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MAX9939EVKIT+ Summary of contents

Page 1

... Differential-Input, Differential-Output Signal Amplification Sensor Interface and Signal Processing SPI is a trademark of Motorola, Inc. µMAX is a registered trademark of Maxim Integrated Products, Inc. Functional Diagram appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www ...

Page 2

SPI Programmable-Gain Amplifier with Input V OS ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V CC INB, OUTA, OUTB, SCLK, DIN, CS............-0. INA+, INA- to GND ..................................................-16V to +16V Output Short-Circuit Current Duration........................Continuous Continuous Input Current into ...

Page 3

Input V ELECTRICAL CHARACTERISTICS (continued 5V 0V Gain = 10V/ GND INA+ INA- Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL Unity-Gain Bandwidth UGBW Slew ...

Page 4

SPI Programmable-Gain Amplifier with Input CSS t CSO SCLK DIN Figure 1. SPI Interface Timing Diagram ( 0V, Gain = 10V/ GND IN+ IN- PGA ...

Page 5

Input 5V 0V 0V, Gain = 10V/ GND IN+ IN- INPUT V vs. TEMPERATURE OS 3.0 2.5 2.0 1.5 1.0 0.5 0 -40 -25 - ...

Page 6

SPI Programmable-Gain Amplifier with Input 5V 0V 0V, Gain = 10V/ GND IN+ IN- OUTPUT IMPEDANCE vs. FREQUENCY 100 AMPLIFIER 0.1 0.01 0.001 0.01 0.1 ...

Page 7

Input 5V 0V 0V, Gain = 10V/ GND IN+ IN- COMMON-MODE REJECTION RESPONSE 200µs/div PIN NAME 1 SCLK Serial-Clock Input 2 DIN Serial-Data Input. ...

Page 8

SPI Programmable-Gain Amplifier with Input SCLK DIN Figure 2. SPI Interface Timing Diagram (CPOL = CPHA = 0) CMRR, gain accuracy, and very low temperature drift due to precise resistor matching. The output of this amplifier is ...

Page 9

Input V SHDN: Set SHDN to 0 for normal operation. Set SHDN place the device in a low-power 13µA shutdown mode. In shutdown mode, the outputs OUTA and OUTB are high impedance, however, the SPI decode ...

Page 10

SPI Programmable-Gain Amplifier with Input V OS Table 4. Input Offset-Voltage Trim INPUT OFFSET VOLTAGE ( TRIMS POSITIVE TRIMS NEGATIVE) V3:V0 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 ...

Page 11

Input V MAX9939 10kΩ INA+ LVL 10kΩ INA- 10kΩ INPUT OFFSET- GAIN SHUTDOWN VOLTAGE TRIM SPI REGISTERS SCLK DIN CS Figure 3. Using the MAX9939 Output Amplifier as an Anti-Aliasing Filter (Corner Frequency = 1.3kHz) to Maximize Nyquist Bandwidth ...

Page 12

SPI Programmable-Gain Amplifier with Input V OS MAX9939 10kΩ INA+ LVL 10kΩ INA- 10kΩ INPUT OFFSET- GAIN SHUTDOWN VOLTAGE TRIM SPI REGISTERS SCLK DIN CS Figure 4. Using the MAX9939 as a Differential-Input, Differential-Output PGA 12 ______________________________________________________________________________________ Trim and Output ...

Page 13

SPI Programmable-Gain Amplifier with Input V OS MAX9939 10kΩ INA+ LVL 10kΩ INA- 10kΩ INPUT OFFSET- GAIN SHUTDOWN VOLTAGE TRIM SPI REGISTERS SCLK DIN CS ______________________________________________________________________________________ Trim and Output Op Amp Functional Diagram 20kΩ ...

Page 14

SPI Programmable-Gain Amplifier with Input V OS For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different ...

Page 15

... 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 ____________________ 15 © 2010 Maxim Integrated Products ...

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