MAX9611 Maxim, MAX9611 Datasheet

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MAX9611

Manufacturer Part Number
MAX9611
Description
The MAX9611/MAX9612 are high-side current-sense amplifiers with an integrated 12-bit ADC and a gain block that can be configured either as an op amp or comparator, making these devices ideal for a number of industrial and automotive applications
Manufacturer
Maxim
Datasheet

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0
19-5543; Rev 3; 6/11
The MAX9611/MAX9612 are high-side current-sense
amplifiers with an integrated 12-bit ADC and a gain
block that can be configured either as an op amp or
comparator, making these devices ideal for a number of
industrial and automotive applications.
The high-side, current-sense amplifiers operate over a
wide 0V to 60V input common-mode voltage range. The
programmable full-scale voltage (440mV, 110mV, and
55mV) of these amplifiers offers wide dynamic range,
accurate current measurement, and application flexibility
in choosing sense resistor values. A choice of either an
internal op amp or a comparator is provided to the user.
The internal amplifier can be used to limit the inrush cur-
rent or to create a current source in a closed-loop sys-
tem. The comparator can be used to monitor fault events
for fast response.
An I
verter (ADC) can be used to read the voltage across the
sense resistor (V
(V
comparator reference voltage (V
temperature. The I
3.3V logic, allowing modern microcontrollers to interface
to it.
The MAX9611 features a noninverting input-to-output
configuration while the MAX9612 features an inverting
input-to-output configuration.
The MAX9611/MAX9612 operate with a 2.7V to 5.5V
supply voltage range, are fully specified over the -40NC
to +125NC automotive temperature range, and are avail-
able in a 3mm x 5mm, 10-pin FMAX
F MAX is a registered trademark of Maxim Integrated Products, Inc.
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.
RSCM
2
C controlled 12-bit, 500sps analog-to-digital con-
Hybrid Automotive Power Supplies
Server Backplanes
Base-Station PA Control
Base-Station Feeder Cable Bias-T
Telecom Cards
Battery-Operated Equipment
), op-amp/comparator output (V
SENSE
High-Side, Current-Sense Amplifiers with
_______________________________________________________________ Maxim Integrated Products 1
2
C bus is compatible with 1.8V and
), the input common-mode voltage
General Description
12-Bit ADC and Op Amp/Comparator
SET
Applications
M
), and internal die
package.
OUT
), op-amp/
S 0V to +60V Input Common-Mode Voltage Range
S 2.7V to 5.5V Power-Supply Range, Compatible
S 5µA Software Shutdown Current
S Integrated 12-Bit ADC
S 13µV Current-Sense ADC Resolution
S 500µV (max) Current-Sense ADC Input Offset
S 0.5% (max) Current-Sense ADC Gain Error
S I
S Small, 3mm x 5mm 10-Pin µMAX Package
S -40NC to +125NC Operating Temperature Range
Note: All devices operate over the -40NC to +125NC tempera-
ture range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagrams appear at end of data sheet.
MAX9611AUB+
MAX9612AUB+
with 1.8V and 3.3V Logic
Voltage
2
C Bus with 16 Addresses
PART
0V TO 60V
V
IN
0.1 µ F
Typical Application Circuit
V
OUT
SET
CC
RS+
Noninverting
Ordering Information/
OUTPUT
Inverting
MAX9611
MAX9612
R
SENSE
GND
RS-
SCL
SDA
A0
A1
Selector Guide
PIN-PACKAGE
10 FMAX
10 FMAX
SCL
SDA
1.8V LOGIC
Features
µ C
LOAD

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MAX9611 Summary of contents

Page 1

... The MAX9611 features a noninverting input-to-output configuration while the MAX9612 features an inverting input-to-output configuration. The MAX9611/MAX9612 operate with a 2.7V to 5.5V supply voltage range, are fully specified over the -40NC to +125NC automotive temperature range, and are avail- able in a 3mm x 5mm, 10-pin FMAX ...

Page 2

... For detailed information on package thermal consideration, refer to www.maxim-ic.com/thermal-tutorial. 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 ...

Page 3

... Common-Mode Rejection Ratio CMRR Power-Supply Rejection Ratio PSRR Full-Scale Sense Voltage LSB Step Size ANALOG PATH, CSA + AMPLIFIER/COMPARATOR Input Offset Voltage SET Input Bias Current Maximum SET Input Voltage Range Signal Bandwidth Gain Bandwidth GBW Propagation Delay Internal Hysteresis V Output Sink Current ...

Page 4

High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator ELECTRICAL CHARACTERISTICS (continued 3.3V +12V RS+ RS- SENSE +25NC.) (Note 2) A PARAMETER SYMBOL OUT VOLTAGE MEASUREMENT (V OUT Full-Scale ...

Page 5

High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator ELECTRICAL CHARACTERISTICS (continued 3.3V +12V RS+ RS- SENSE +25NC.) (Note 2) A PARAMETER SYMBOL POWER-SUPPLY CHARACTERISTICS Power-Supply Input Range Quiescent ...

Page 6

... COMMON-MODE VOLTAGE +25° -40° ( ______________________________________________________________________________________ Typical Operating Characteristics MAX9611 CSA OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 700 8x ADC PATH 600 T = +125°C A 500 400 T = +85°C A 300 200 100 -40°C A -100 T = +25°C A ...

Page 7

... High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator (V = 3.3V 12V +25NC, unless otherwise noted MAX9611 CSA GAIN ERROR vs. COMMON-MODE VOLTAGE 1.00 8x ADC PATH 0.80 0.60 -40°C +25°C 0.40 0.20 0 -0.20 +85°C -0.40 +125°C -0.60 -0.80 -1. (V) CM OUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENT 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 OUTPUT SINK CURRENT (mA) CSA GAIN vs ...

Page 8

... TIME (10s/div) DIFFERENTIAL NONLINEARITY vs. DIGITAL OUTPUT CODE (SET INPUT) 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 512 1024 1536 2048 2560 3072 3584 4096 DIGITAL CODE ADC NOISE HISTOGRAM 20mV (GAIN = 8x) SENSE 1000 900 800 700 600 500 400 300 200 100 0 DIGITAL CODE MAX9611 toc17 ...

Page 9

... MAX9611 toc24 DTIM = 0, RTIM = 600mV SET PULSE WIDTH > 1ms V 200mV/div CSAIN V 5V/div OUT TIME (4ms/div) WATCHDOG LATCH MODE 111 MAX9611 toc26 V 200mV/div CSAIN 5V/div V DTIM = 0, RTIM = 1 OUT V = 600mV SET PULSE WIDTH > 1ms TIME (1ms/div) WATCHDOG LATCH RETRY MODE 111 MAX9611 toc28 ...

Page 10

... Address Input Address Input Supply Voltage Input. Bypass _____________________________________________________________________________________ + OUT RS RS MAX9611 MAX9612 SET 4 7 SDA GND 5 6 SCL MAX µ FUNCTION to GND with a 0.1FF and a 4.7FF capacitor in parallel. CC Pin Configuration Pin Description ...

Page 11

... OP AMP/ OUT TEMP COMP SET RS+ RS- CSA 1x, 4x, 2.5x 8x OUT OP AMP/ TEMP COMP SET NOTE: ANALOG PATH IN BOLD. ______________________________________________________________________________________ Functional Diagrams V CC MAX9611 DECODER 2 12-BIT I C MUX ADC REGISTERS GND V CC MAX9612 DECODER 2 12-BIT I C MUX ADC REGISTERS GND A0 A1 ...

Page 12

... MAX9612 has an inverting input-to-output configuration. Current-Sense Amplifier The MAX9611/MAX9612 feature a precision current-sense amplifier with 60V input common-mode voltage range. An internal negative charge pump eliminates input Table 1. Binary and Hex Digital Output Values for Temperature Measurements TEMPERATURE (NC) +122 ...

Page 13

... C interface consists of a serial-data line (SDA) and serial-clock line (SCL). SDA and SCL facilitate bidirectional communication between the MAX9611/MAX9612 and the master at rates up to 400kHz. The MAX9611/MAX9612 are slave devices that transfer and receive data. The master (typically a micro- controller) initiates data transfer on the bus and gener- ates the SCL signal to permit that transfer ...

Page 14

... A1 and A0. See Table 2 for different slave address options. The least significant bit (LSB) of the address byte (R/W) determines whether the master is writing to or reading from the MAX9611/ MAX9612 (R selects a write condition, R selects a read condition). After receiving the address, the MAX9611/MAX9612 (slave) issue an acknowledge by pulling SDA low for one clock cycle ...

Page 15

... BIT 7 BIT 6 BIT 5 LSB05 LSB03 LSB02 Control Register 8-bit write/read register that configures the MAX9611/MAX9612 for different modes of opera- tion. Tables 4 and 5 show the bit location and function for Control Register 1. Table 4. Control Register 1 Bit Location BIT NUMBER 7 BIT NAME ...

Page 16

High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator Table 5. Control Register 1 Bit Description BIT BIT NAME 000 Channel A: Read current-sense amplifier output from ADC, gain = 1x 001 Channel A: Read current-sense amplifier output from ADC, ...

Page 17

... Applications Information Inrush Current Limiter The MAX9611 can be used as an inrush current limiter for a number of applications as shown in Figure 3. Note that the sense resistor can be placed on either side of the pFET. Since the input common-mode voltage of the ...

Page 18

... High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator Base-Station PA Gain Control While the MAX9611 is designed to control high-side pFETs, the MAX9612 can be similarly used to control low-side nFETs. For example the MAX9612 can be used to control the DC bias point of power amplifier LDMOS or GaN nFETs in base-station applications. The circuit ...

Page 19

... ADC and Op Amp/Comparator 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 suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 20

... 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 ...

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