Datasheet

12Maxim Integrated
MAX44259/MAX44260/MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
Chip Information
PROCESS: BiCMOS
Input Bias Current
The ICs feature a high-impedance CMOS input stage
and a specialized ESD structure that allows low-input
bias current operation at low-input, common-mode volt-
ages. Low-input bias current is useful when interfacing
with high-ohmic sensors. It is also beneficial for design-
ing transimpedance amplifiers for photodiode sensors.
This makes these devices ideal for ground-referenced
medical and industrial sensor applications.
Active Filters
The MAX44259/MAX44260/MAX44261/MAX44263 are
ideal for a wide variety of active filter circuits that make
use of their wide bandwidth, rail-to-rail input/output
stages and high-impedance CMOS inputs. The Typical
Application Circuit shows an example Sallen-Key active
filter circuit with a corner frequency of 10kHz. At low
frequencies, the amplifier behaves like a simple low-
distortion noninverting buffer, while its high bandwidth
gives excellent stopband attenuation above its corner
frequency. See the Typical Application Circuit.
Driver for Interfacing with
the MAX11645 ADC
The ICs’ tiny size and low noise makes them a good fit for
driving 12- to 16-bit resolution ADCs in space-constrained
applications. The Typical Application Circuit shows the
MAX44260 amplifier output connected to a lowpass filter
driving the MAX11645 ADC. The MAX11645 is part of a
family of 3V and 5V, 12-bit and 10-bit, 2-channel ADCs.
The MAX11645 offers sample rates up to 94ksps and
measures two single-ended inputs or one differential
input. These ADCs dissipate 670FA at the maximum
sampling rate, but just 6FA at 1ksps and 0.5FA in shut-
down. Offered in the ultra-tiny, 1.9mm x 2.2mm WLP and
FMAX-8 packages, the MAX11645 ADCs are an ideal fit
to pair with the MAX44260/MAX44261/MAX44263 ampli-
fiers in portable applications.
Where higher resolution is required, refer to the MAX1069
(14-bit) and MAX1169 (16-bit) ADC families.
PART TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX44259AUK+ -40NC to +125NC 5 SOT23 +AMFX
MAX44260AXT+ -40NC to +125NC 6 SC70 +AEB
MAX44260AYT+ -40NC to +125NC
6 Thin FDFN
(Ultra-Thin LGA)
+AY
MAX44261AXT+ -40NC to +125NC 6 SC70 +AEC
MAX44263AXA+ -40NC to +125NC 8 SC70 +AAG