MAX9611 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator

19-5543; Rev 2; 1/11
EVAALVUAAILTAIOBNLEKIT
High-Side, Current-Sense Amplifiers with
12-Bit ADC and Op Amp/Comparator
General 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.
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 I²C controlled 12-bit, 500sps analog-to-digital con-
verter (ADC) can be used to read the voltage across the
sense resistor (VSENSE), the input common-mode voltage
(VRSCM), op-amp/comparator output (VOUT), op-amp/
comparator reference voltage (VSET), and internal die
temperature. The I²C bus is compatible with 1.8V and
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^M package.
Applications
Hybrid Automotive Power Supplies
Server Backplanes
Base-Station PA Control
Base-Station Feeder Cable Bias-T
Telecom Cards
Battery-Operated Equipment
Features
S 0V to +60V Input Common-Mode Voltage Range
S 2.7V to 5.5V Power-Supply Range, Compatible
with 1.8V and 3.3V Logic
S 5µA Software Shutdown Current
S Integrated 12-Bit ADC
S 13µV Current-Sense ADC Resolution
S 500µV (max) Current-Sense ADC Input Offset
Voltage
S 0.5% (max) Current-Sense ADC Gain Error
S I²C Bus with 16 Addresses
S Small, 3mm x 5mm 10-Pin µMAX Package
S -40NC to +125NC Operating Temperature Range
Ordering Information/
Selector Guide
PART
MAX9611AUB+
MAX9612AUB+
OUTPUT
Noninverting
Inverting
PIN-PACKAGE
10 FMAX
10 FMAX
Note: All devices operate over the -40NC to +125NC tempera-
ture range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Application Circuit
0V TO 60V
RSENSE
VIN
0.1µF
RS+
RS-
VCC
A0
A1
OUT
MAX9611
MAX9612
SET
SCL
SDA
GND
LOAD
µC
SCL
1.8V LOGIC
SDA
FMAX is a registered trademark of Maxim Integrated Products, Inc. _{Functional Diagrams appear at end of data sheet.}
________________________________________________________________ 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.