The LMV76x devices are precision comparators intended for applications requiring low noise and low input offset voltage. The LMV761 single has a shutdown pin that can be used to disable the device and reduce the supply current. The LMV761 is available in a space-saving 6-pin SOT-23 or 8-Pin SOIC package. The LMV762 dual is available in 8-pin SOIC or VSSOP package. The LMV762Q-Q1 is available VSSOP and SOIC packages.
These devices feature a CMOS input and push-pull output stage. The push-pull output stage eliminates the need for an external pullup resistor.
The LMV76x are designed to meet the demands of small size, low power and high performance required by portable and battery-operated electronics.
The input offset voltage has a typical value of 200 μV at room temperature and a 1-mV limit over temperature.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LMV761 | SOIC (8) | 4.90 mm × 3.91 mm |
SOT-23 (6) | 2.90 mm × 1.60 mm | |
LMV762 LMV762Q-Q1 |
SOIC (8) | 4.90 mm × 3.91 mm |
VSSOP (8) | 3.00 mm × 3.00 mm |
Changes from H Revision (March 2013) to I Revision
Changes from G Revision (March 2013) to H Revision
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | +IN | I | Noninverting input |
2 | V- | P | Negative power terminal |
3 | -IN | I | Inverting input |
4 | OUT | O | Output |
5 | SDB | I | Shutdown (active low) |
6 | V+ | P | Positive power terminal |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | N/C | — | No Connect (not internally connected) |
2 | -IN | I | Inverting Input |
3 | +IN | I | Noninverting Input |
4 | V- | P | Negative Power Terminal |
5 | SDB | I | Shutdown (active low) |
6 | OUT | O | Output |
7 | V+ | P | Positive Power Terminal |
8 | N/C | — | No Connect (not internally connected) |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | OUTA | O | Channel A Output |
2 | -INA | I | Channel A Inverting Input |
3 | +INA | I | Channel A Noninverting Input |
4 | V- | P | Negative Power Terminal |
5 | +INB | I | Channel B Noninverting Input |
6 | -INB | I | Channel B Inverting Input |
7 | OUTB | O | Channel B Output |
8 | V+ | P | Positive Power Terminal |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Supply voltage (V+ – V−) | 5.5 | V | ||
Differential input voltage | Supply Voltage | |||
Voltage between any two pins | Supply Voltage | |||
Output short circuit duration(3) | Current at input pin | ±5 | mA | |
Soldering information | Infrared or convection (20 sec.) | 235 | °C | |
Wave soldering (10 sec.) (Lead temp) | 260 | °C | ||
Junction temperature | 150 | °C | ||
Storage temperature, Tstg | −65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge(2) | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ± 2000 | V |
Machine model | ± 200 |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per AEC Q100-002(1) | ± 2000 | V |
Machine model | ± 200 |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Supply voltage (V+ – V−) | 2.7 | 5.25 | V | |
Temperature range | −40 | 125 | °C |
THERMAL METRIC(1) | LMV761 | LMV762, LMV762Q-Q1 | UNIT | ||
---|---|---|---|---|---|
D (SOIC) | DBV (SOT-23) | DGK (VSSOP) | |||
8 PINS | 6 PINS | 8 PINS | |||
RθJA | Junction-to-ambient thermal resistance (2) | 190 | 265 | 235 | °C/W |
PARAMETER | TEST CONDITIONS | MIN(4) | TYP(3) | MAX(4) | UNIT | ||
---|---|---|---|---|---|---|---|
VOS | Input offset voltage | 0.2 | mV | ||||
apply at the temperature extremes(2) | 1 | ||||||
IB | Input bias current(5) | 0.2 | 50 | pA | |||
IOS | Input offset current(5) | 0.001 | 5 | pA | |||
CMRR | Common-mode rejection ratio | 0 V < VCM < VCC – 1.3 V | 80 | 100 | dB | ||
PSRR | Power supply rejection ratio | V+ = 2.7 V to 5 V | 80 | 110 | dB | ||
CMVR | Input common-mode voltage range | CMRR > 50 dB | apply at the temperature extremes(2) | −0.3 | 1.5 | V | |
VO | Output swing high | IL = 2 mA, VID = 200 mV | V+ – 0.35 | V+ – 0.1 | V | ||
Output swing low | IL = −2 mA, VID = –200 mV | 90 | 250 | mV | |||
ISC | Output short circuit current(1) | Sourcing, VO = 1.35 V, VID = 200 mV | 6 | 20 | mA | ||
Sinking, VO = 1.35 V, VID = –200 mV | 6 | 15 | |||||
IS | Supply current LMV761 (single comparator) | 275 | 700 | μA | |||
LMV762, LMV762Q-Q1 (both comparators) | 550 | μA | |||||
apply at the temperature extremes(2) | 1400 | ||||||
IOUT LEAKAGE | Output leakage I at shutdown | SD = GND, VO = 2.7 V | 0.2 | μA | |||
IS LEAKAGE | Supply leakage I at shutdown | SD = GND, VCC = 2.7 V | 0.2 | 2 | μA |
PARAMETER | TEST CONDITIONS | MIN(4) | TYP(3) | MAX(4) | UNIT | ||
---|---|---|---|---|---|---|---|
VOS | Input offset voltage | 0.2 | mV | ||||
apply at the temperature extremes(2) | 1 | ||||||
IB | Input bias current(5) | 0.2 | 50 | pA | |||
IOS | Input offset current(5) | 0.01 | 5 | pA | |||
CMRR | Common-mode rejection ratio | 0 V < VCM < VCC – 1.3 V | 80 | 100 | dB | ||
PSRR | Power supply rejection ratio | V+ = 2.7 V to 5 V | 80 | 110 | dB | ||
CMVR | Input common-mode voltage range | CMRR > 50 dB | apply at the temperature extremes(2) | −0.3 | 3.8 | V | |
VO | Output swing high | IL = 4 mA, VID = 200 mV | V+ – 0.35 | V+ – 0.1 | V | ||
Output swing low | IL = –4 mA, VID = –200 mV | 120 | 250 | mV | |||
ISC | Output short circuit current(1) | Sourcing, VO = 2.5 V, VID = 200 mV | 6 | 60 | mA | ||
Sinking, VO = 2.5 V, VID = −200 mV | 6 | 40 | |||||
IS | Supply current LMV761 (single comparator) | 225 | 700 | μA | |||
LMV762, LMV762Q-Q1 (both comparators) | 450 | μA | |||||
apply at the temperature extremes(2) | 1400 | ||||||
IOUT LEAKAGE | Output leakage I at shutdown | SD = GND, VO = 5 V | 0.2 | μA | |||
IS LEAKAGE | Supply leakage I at shutdown | SD = GND, VCC = 5 V | 0.2 | 2 | μA |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
tPD | Propagation delay RL = 5.1 kΩ CL = 50 pF |
Overdrive = 5 mV | 270 | ns | ||
Overdrive = 10 mV | 205 | |||||
Overdrive = 50 mV | 120 | |||||
tSKEW | Propagation delay skew | 5 | ns | |||
tr | Output rise time | 10% to 90% | 1.7 | ns | ||
tf | Output fall time | 90% to 10% | 1.8 | ns | ||
ton | Turnon time from shutdown | 6 | μs |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
tPD | Propagation delay RL = 5.1 kΩ CL = 50 pF |
Overdrive = 5 mV | 225 | ns | ||
Overdrive = 10 mV | 190 | |||||
Overdrive = 50 mV | 120 | |||||
tSKEW | Propagation delay skew | 5 | ns | |||
tr | Output rise time | 10% to 90% | 1.7 | ns | ||
tf | Output fall time | 90% to 10% | 1.5 | ns | ||
ton | Turnon time from shutdown | 4 | μs |
VO = High |
VO = Low |
The LMV76x family of precision comparators is available in a variety of packages and is ideal for portable and battery-operated electronics.
To minimize external components, the LMV76x family features a push-pull output stage where the output levels are power-supply determined. In addition, the LMV761 (single) features an active-low shutdown pin that can be used to disable the device and reduce the supply current.
A basic comparator circuit is used to convert analog input signals to digital output signals. The comparator compares an input voltage (VIN) at the noninverting input to the reference voltage (VREF) at the inverting pin. If VIN is less than VREF the output (VO) is low (VOL). However, if VIN is greater than VREF, the output voltage (VO) is high (VOH).
The basic comparator configuration may oscillate or produce a noisy output if the applied differential input is near the input offset voltage of the comparator, which tends to occur when the voltage on one input is equal or very close to the other input voltage. Adding hysteresis can prevent this problem. Hysteresis creates two switching thresholds (one for the rising input voltage and the other for the falling input voltage). Hysteresis is the voltage difference between the two switching thresholds. When both inputs are nearly equal, hysteresis causes one input to effectively move quickly past the other. Thus, moving the input out of the region in which oscillation may occur.
Hysteresis can easily be added to a comparator in a noninverting configuration with two resistors and positive feedback Figure 22. The output will switch from low to high when VIN rises up to VIN1, where VIN1 is calculated by Equation 1:
The output will switch from high to low when VIN falls to VIN2, where VIN2 is calculated by Equation 2:
The Hysteresis is the difference between VIN1 and VIN2, as calculated by Equation 3:
The LMV76x devices have near-zero input bias current, which allows very high resistance circuits to be used without any concern for matching input resistances. This near-zero input bias also allows the use of very small capacitors in R-C type timing circuits. This reduces the cost of the capacitors and amount of board space used.
The LMV761 features a low-power shutdown pin that is activated by driving SD low. In shutdown mode, the output is in a high-impedance state, supply current is reduced to 20 nA and the comparator is disabled. Driving SD high will turn the comparator on. The SD pin must not be left unconnected due to the fact that it is a high-impedance input. When left unconnected, the output will be at an unknown voltage. Do not three-state the SD pin.
The maximum input voltage for SD is 5.5 V referred to ground and is not limited by VCC. This allows the use of
5-V logic to drive SD while VCC operates at a lower voltage, such as 3 V. The logic threshold limits for SD are proportional to VCC.