Product Descriptions
The LTC ®1440/LTC1441/LTC1442 are ultralow power single and dual comparators with built-in references. The comparators feature less than 3.7µA supply current over temperature (LTC1440), a 1.182V ±1% reference, programmable hysteresis (LTC1440/LTC1442) and TTL/CMOS outputs that sink and source current. The reference output can drive a bypass capacitor of up to 0.01µF without oscillation.
The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1440). Comparator hysteresis is easily programmed by using two resistors and the HYST pin (LTC1440/LTC1442). Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, the power supply glitches are eliminated.
The LTC1440 is available in 8-pin PDIP, SO and MSOP packages. The LTC1441/LTC1442 are available in 8-pin PDIP and SO packages.
Product Features
■ Ultralow Quiescent Current: 2.1µA Typ (LTC1440)
■ Wide Supply Range:
Single: 2V to 11V
Dual: ±1V to ±5.5V
■ Input Voltage Range Includes the Negative Supply
■ Reference Output Drives 0.01µF Capacitor
■ Adjustable Hysteresis (LTC1440/LTC1442)
■ TTL/CMOS Compatible Outputs
■ 12µs Propagation Delay with 10mV Overdrive
■ No Crowbar Current
■ 40mA Continuous Source Current
■ Pin Compatible Upgrades for MAX921/922/923
Product Applications
■ Battery-Powered System Monitoring
■ Threshold Detectors
■ Window Comparators
■ Oscillator Circuits
Product Specification
| Attribute | Attribute value |
| ANSM-Part# | ANSM-LTC1440CS8#PBF |
| Category | Integrated Circuits (ICs) |
| Linear | |
| Comparators | |
| Manufacturer | - |
| Packaging | Tube |
| Part Status | Active |
| Type | with Voltage Reference |
| Number of Elements | 1 |
| Output Type | CMOS, TTL |
| Voltage - Supply, Single/Dual (±) | 2V ~ 11V, ±1V ~ 5.5V |
| Voltage - Input Offset (Max) | 10mV @ 5V |
| Current - Output (Typ) | 40mA |
| Current - Quiescent (Max) | 4.4µA |
| CMRR, PSRR (Typ) | 80dB CMRR, 80dB PSRR |
| Propagation Delay (Max) | 15µs |
| Hysteresis | 50mV |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Supplier Device Package | 8-SO |
| Base Product Number | LTC1440 |
Product Photos
For more product information, please download the PDF
