TS12011/TS12012
BLOCK DIAGRAM
to latch to either a HIGH or LOW state under certain
conditions. If ꢀꢁꢂꢃT is set HIGH, the COMPOUT
output will respond to the applied comparator input.
However, when ꢀꢁꢂꢃT is set LOW and the TS12011
output is HIGH, COMPOUT will remain HIGH until
ꢀꢁꢂꢃT toggles LOW. When COMPOUT is initially
LOW instead, COMPOUT will latch HIGH and remain
HIGH on a LOW-to-HIGH transition at the input of the
comparator until ꢀꢁꢂꢃT goes HIGH. The TS12012
output is the inverted version of the TS12011 output.
The ꢀꢁꢂꢃT pin must not be left open and should be
connected to VDD for normal unlatched operation or to
VSS for latched operation.
THEORY OF OPERATION
The TS12011 and TS12012 combine a 0.58V ±4.5%
reference, a 20µs analog comparator, and a unity-
gain stable operational amplifier in a single package.
All three devices operate from a single 0.8V to 2.5V
power supply and consume less than 1.6µA total
supply current. The TS12011 comparator has a push-
pull output stage while the TS12012 comparator has
an open-drain output stage that allows for easy
output voltage level translation as can occur when
driving systems powered with a different power
supply rail. Both the analog comparator and the op
amp feature a common mode input range from VSS to
VDD. The analog comparator exhibits ±7.5mV of
internal hysteresis for clean, chatter-free output
switching. The internal reference was designed to
sink or source up to 0.1µA load currents.
Op Amp
The TS12011 and TS12012 have a unity-gain stable
op-amp with a GBWP of 15kHz, a slew rate of 6V/ms,
and can drive a capacitive load up to 50pF. The
common mode input voltage range extends from VSS
to VDD and the input bias current and
The TS12011 and the TS12012 have a latch enable
pinꢀꢁꢀꢁꢂꢃTꢂ that allows the output of the comparator
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TS12011_12DS r1p0
RTFDS
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