Detailed Description
The MAX9060–MAX9064 are extremely small com-
parators ideal for compact, low-current, and lowvoltage
applications.
The MAX9060/MAX9061 consume only 50nA (typ) oper-
ating current, while the MAX9062/MAX9063/MAX9064
consume only 400nA (typ). The low-voltage operat-
ing capability of the MAX9060–MAX9064 makes these
devices extremely attractive to long-life battery-operated
devices—these applications can now use a single digital
power-supply rail to power the new generation of micro-
controllers (which can be down to 0.9V). A single AA/AAA
cell can drop down to 0.9V in full discharge. All parts are
available in a tiny 4-bump UCSP, that is only 0.6mm tall,
and occupies a 1mm x 1mm footprint and a 5-pin SOT23.
Input Stage Circuitry
Noninverting inputs are available on the MAX9060/
MAX9062/MAX9064 and inverting inputs are available on
the MAX9061/MAX9063.
The MAX9060–MAX9064 incorporate an innovative
input stage architecture that allows their input voltage
to exceed VCC by several volts (limited only by the
Absolute Maximum Ratings). This is unlike tradition-
al comparators that have an input ESD diode clamp
between the input and VCC, limiting this maximum over-
voltage to about 0.3V. The MAX9060–MAX9064 archi-
tecture maintains a high input impedance to input signals
even when the device power-supply voltage is completely
turned off (VCC or REF taken to 0V). This greatly benefits
flexible power-saving schemes to be easily implemented
in advanced battery-operated devices. On-chip filtering
provides immunity from any RF noise being picked up by
input traces. These devices feature an internal temper-
ature-compensated, low-power 0.2V reference voltage.
Output Stage Structure
The MAX9060–MAX9063 have open-drain outputs that
allow them to interface to logic circuitry running from sup-
ply voltages other than the one supplied to the part. These
devices require an external pullup resistor or current
source for proper operation. Many microcontroller digital
inputs ports can be readily programmed to include these.
The MAX9064 has a push-pull output stage that can
both sink and source current, eliminating the need for an
external pullup resistor. In this case, the MAX9064 uses
the microcontroller’s power supply as VCC.
BUMP PIN
NAME FUNCTION
UCSP SOT23
MAX9060
MAX9061
MAX9062
MAX9063
MAX9064
MAX9060
MAX9061
MAX9062
MAX9063
MAX9064
A1 A1 5 5 OUT
Comparator Output. The MAX9060–MAX9063 have
open-drain outputs. The MAX9064 has a push-pul
output.
A2 A2 4 4 IN
Comparator Input. The MAX9060, MAX9062, and
MAX9064 have noninverting inputs. The MAX9061 and
MAX9063 have inverting inputs.
— B1 — 1 VCC
Power-Supply Voltage. Bypass to ground with a 0.1µF
bypass capacitor.
B1 — 1 — REF
External Reference Input. REF also supplies power
to the device. Bypass to ground with a 0.1µF bypass
capacitor.
B2 B2 2, 3 2, 3 GND GROUND.
MAX9060–MAX9064 Ultra-Small, nanoPower Single
Comparators in 4-Bump UCSP and 5 SOT23
www.maximintegrated.com Maxim Integrated
│
7
Pin/Bump Description