LINEAR BUILDING BLOCK –
VOLTAGE REFERENCE, DUAL OP AMP,
DUAL COMPARATOR WITH SHUTDOWN MODE
PRELIMINARY INFORMATION
TC43
ELECTRICAL CHARACTERISTICS: (Cont.) TA = Over Operating Temperature Range, VDD = 5.0V ±10%,
VSS = 0V, SHDN = VDD, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
Comparators (Cont.)
TDESEL
CMPTR1 Deselect time
(HI-Z from SHDN = VIL)
—
5
—
µsec
VIN
Differential Input Voltage Range
Both VINs > = VSS
—
VSS
—
—
—
50
—
VDD
VDD
+10
—
V
V
VIN(CM)
VOS
IB
Input Common Mode Voltage Range Note 3, 5
Input Offset Voltage
Input Bias Current
Output High Voltage
VCM = (VDD – VSS)/2
IN+ or IN–
– 10
mVDC
pA
—
VOH
RL = 10kΩ to VSS
,
VDD – 0.3
—
V
1.8 < VDD < 5.5V
VOL
IOH
Output Low Voltage
RL = 10kΩ to VDD
1.8 < VDD < 5.5V
—
—
3
0.3
8
V
Output Source Current
(Continuous)
VIN (+) = VDD, VIN (–) = VSS
1.3
mA
VDD = 1.8V, Output
Shorted to VSS
IOL
Output Sink Current
(Continuous)
VIN (–) = VDD, VIN (+) = VSS
VDD = 1.8V, Output
Shorted to VDD
2.5
6
15
mA
tPD1
Response Time
100mV Overdrive (Note 4)
10mV Overdrive (Note 4)
SHDN = VSS
—
—
20
—
15
60
—
3
—
—
—
5
µsec
µsec
MΩ
pF
tPD2
Response Time
ROUT(SD)
COUT(SD)
Voltage Reference
VREF
Output Resistance in Shutdown
Output Capacitance in Shutdown SHDN = VSS (Note 5)
Reference Voltage
Load Regulation
No Load
1.152
—
1.200
– 300
1.248
—
V
0mA < ISOURCE < 5mA
µV/mA
VDD = 5V, TA = 25°C
CL(REF)
NVREF
Load Capacitance
Voltage Noise
—
—
—
100
—
pF
100Hz to 100kHz
100
µVRMS
NOTES: 1. The reference and one comparator remain active in SHUTDOWN mode.
2. Op Amp configured as a voltage follower (inverting input connected to output; signal applied to non-inverting input).
3. Input common-mode voltage should not be allowed to go negative by more than 0.3V.
4. VDD = 5.0V; CL = 100pF.
5. Guaranteed by Design
DETAILED DESCRIPTION
Operational Amplifiers
Both op amps have rail-to-rail outputs, and an input
common range that includes ground. Input offset voltage is
1.0mV and input bias current is only 50pA. The outputs are
protected against short circuits. Both op amps are disabled
(powered down and outputs at high impedance) during
shutdown.
TheTC43isthefirstofaseriesofverylowpower, Linear
Building Block products targeted at low voltage, single
supply applications. The TC43 minimum operating voltage
is 1.8V and maximum supply current is only 15µA (fully
enabled). It combines two comparators, two op amps and a
voltage reference in a single package. A shutdown mode is
incorporated for easy adaptation to system power manage-
ment schemes. During shutdown, all but one comparator
and the voltage reference are disabled (i.e. powered down
and with their respective outputs at high impedance). The
“still awake” comparator and voltage reference can be used
as wake-up timer, power supply monitor, LDO controller or
other continuous duty circuit function.
Comparators
Both comparators feature complimentary outputs with
current sinking capability of 2.5mA. Inputs and outputs are
rail-to-rail.ComparatorCMPTR1isdisabled(powereddown
and outputs at high impedance) during shutdown. CMPTR2
remains fully enabled during shutdown.
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