LT1017CH - Micropower Dual Comparator | Analog Devices
MPN: LT1017CH ✓ AktifLT1017CH Ringkasan
A comparator is an analog semiconductor that compares two input voltages and produces a binary output indicating which input is higher. The LT1017 belongs to the comparator and analog IC hierarchy, where it provides low-power signal conditioning for sensors, thresholds, and control systems. Its micropower operating characteristics are particularly useful when battery energy must be conserved over long operating periods. The dual-channel configuration also allows two comparisons to be performed with one package.
The LT1017 is specified for a maximum offset voltage of 1 mV, maximum bias current of 15 nA, typical output drive of 70 mA, and typical supply current of 110 uA for the LT1017. These characteristics support precision threshold detection and low-leakage sensing. The output can also drive loads above V+ with 30 uA of output current, which is useful when the load is connected to a supply rail rather than to ground.
Typical applications include battery-powered sensor interfaces, window comparators for industrial controls, low-power monitoring circuits, portable medical equipment, and embedded threshold detection. The wide operating-voltage capability allows the same comparator family to be used with single-cell supplies and substantially higher industrial rails. Care should be taken to maintain adequate input common-mode range, supply sequencing, and output-load limits for the selected configuration.
This product page combines the manufacturer datasheet, distributor references, package information, practical application guidance, and qualification boundaries for engineers comparing low-power dual comparators. It emphasizes the known LT1017CH electrical characteristics and identifies application-specific checks that should be completed against the latest datasheet before layout or production release.
Pilihan pengganti yang segera untuk LT1017CH — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
LT1018MH
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LT1017CH Penilaian maksimum & Ciri-ciri Elektrik
| Comparator Type | Dual general-purpose micropower comparator |
| Number of Channels | 2 |
| Supply Voltage Range | 1.1 V to 40 V |
| Maximum Offset Voltage | 1 mV |
| Maximum Bias Current | 15 nA |
| Typical Output Drive | 70 mA |
| LT1017 Typical Supply Current | 110 uA |
| Output Current Above V+ | 30 uA |
| Output Stage | Class B pull-up current source |
| Kemasan | 8-pin TO-5 |
| Product Type | Micropower dual comparator |
| Operating Power Optimization | Optimized for lowest operating power |
| Jenis Pemasangan | Through-hole |
Panduan Konfigurasi Pin LT1017CH 8-pin to-5
Konfigurasi pin untuk LT1017CH (8-pin to-5 pakai). Komponen analog ini mempunyai pin masukan, keluaran, dan kuasa. Rujuk dokumen pengeluar untuk konfigurasi pengecualian, pemulihan, dan pin aktifkan. Ideal untuk pengawasan isyarat dan litar pengukur.
Tiada data garisan pin yang diperoleh untuk LT1017CH.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
LT1017CH patut untuk 6 aplikasis: Battery-Powered Sensor Threshold Detection, Portable Instrumentation Window Comparator, Industrial Control-Signal Qualification, Low-Leakage Level Monitoring, Portable Medical Equipment Alarm Interface, Embedded Control and Safety Interlock.
Battery-Powered Sensor Threshold Detection
The LT1017CH is well suited to threshold detection in battery-powered sensor nodes because it operates from 1.1 V to 40 V and the LT1017 typical supply current is 110 uA. Place one channel across a sensor-derived voltage to provide a clean binary indication of a threshold crossing. The 1 mV maximum offset specification supports decisions near the reference point, while 15 nA maximum bias current helps minimize interference with high-impedance sensing nodes. Its Class B pull-up output removes the usual external pull-up resistor, reducing both board area and current. The designer should still calculate the complete node current, including sensor and leakage paths, and verify that the monitored voltage remains inside the comparator's input common-mode range.
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Portable Instrumentation Window Comparator
A dual-window comparator can use both LT1017CH channels to determine whether a measured signal lies above a lower threshold and below an upper threshold. The 1 mV maximum offset voltage is useful in precision instrumentation, while the 70 mA typical output drive provides flexibility for downstream logic. Because the LT1017 supply current is typically 110 uA, it suits portable instruments in which comparator consumption can materially affect battery life. The internal Class B pull-up current source simplifies the output network, although each channel still needs independent input and output validation. Reference accuracy, common-mode headroom, and propagation delay should be checked together because the threshold error visible at the system level depends on more than the comparator's offset voltage alone.
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Industrial Control-Signal Qualification
The LT1017CH can qualify a noisy or offset control signal by comparing it against a stable threshold and producing a logic-level decision for a controller. Its ability to operate across a 1.1 V to 40 V supply range makes it applicable to compact industrial control modules with different rail arrangements. The Class B pull-up output stage removes the need for a conventional resistor and helps reduce component count, while the low typical supply current of 110 uA helps control standby demand. Industrial qualification nevertheless requires separate review of transient immunity, input protection, and the operating-temperature limits listed in the latest datasheet. The device is a comparator rather than a protected analog input, so external filtering and clamping may be necessary when the source includes motor, relay, or switching-node transients.
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Low-Leakage Level Monitoring
For low-current battery systems, the LT1017CH can monitor a supply or signal level and report whether it remains above a critical threshold. Its maximum bias current of 15 nA limits the comparator's loading on high-impedance sources, while the 1.1 V minimum supply enables operation from a single cell. The internal pull-up current source produces a usable logic output without a discrete resistor, which supports compact sensing modules. During design, calculate the comparator's actual contribution from both channels, including output state and leakage, because the 110 uA typical LT1017 supply-current figure is not the entire battery budget. Also ensure that the monitored level and any reference voltage remain inside the input common-mode limits throughout discharge, charging, and fault conditions.
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Portable Medical Equipment Alarm Interface
The LT1017CH can support a compact alarm or event-detection interface in portable medical and personal monitoring equipment by comparing a sensed value against a limit and driving downstream logic. Its micropower characteristic is valuable where battery capacity is constrained, and the dual-channel configuration allows two limits to be checked in one package. The 15 nA maximum bias current helps reduce loading on sensitive measurement nodes, while the Class B pull-up output simplifies board layout. Medical-system designers must separately evaluate applicable product standards, patient-safety isolation, input protection, and diagnostic behavior; comparator qualification alone does not establish compliance for a finished medical device. Reference stability and the residual error of the sensing chain should be validated across the full battery and temperature range.
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Embedded Control and Safety Interlock
Two LT1017CH channels can implement independent comparisons for an embedded control board, allowing a supervisor to detect an invalid voltage or a signal outside an accepted range. Its broad 1.1 V to 40 V operating range supports low-voltage logic rails and higher-energy systems, while the internal pull-up source reduces output-component count. The 70 mA typical output drive is useful when driving ordinary logic, but the exact source, sink, and above-V+ behavior must be checked against the load. In safety-related designs, the comparator should not be treated as the sole protection element without considering redundancy, fault diagnostics, reset behavior, and safe-state implementation. Firmware should treat an invalid, floating, or saturated comparison result according to the system's fail-safe architecture.
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Data referensi kejuruteraan untuk LT1017CH — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | LT1018MH |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Comparator Configuration | Dual | Dual |
| Supply Voltage Range | 1.1 V to 40 V | 1.1 V to 40 V |
| Optimization | Lowest operating power | Higher power and higher speed |
| Output Pull-Up | Internal Class B current source | Internal Class B current source |
Penyeberangsung Jelas
- Lowest-power optimization within the related dual-comparator family (vsLT1018MH)
- Very low input bias current (vsLT1018MH)
- Low offset voltage with internal pull-up current source (vsLT1018MH)
Catatan Desain
Budget the LT1017 at its typical 110 uA supply current before assigning it to a battery-powered design, then add both channels, external loads, reference current, and leakage paths. The low comparator current can still be significant when the surrounding sensor consumes only a few microamps. Enable each channel only when necessary where the application permits it, and confirm that the internal Class B pull-up does not create an unacceptable static dissipation path in the selected output state.
Do not select the LT1017CH solely because it is a dual comparator. Verify that both input voltages remain within the common-mode range for the actual supply voltage, including the supply range where the device changes from single-cell operation to higher rails. Also check output drive under the real load, particularly for loads connected above V+, because the 70 mA typical output-drive figure and 30 uA above-V+ current describe different operating conditions.
Route each comparator input as a short, guarded analog trace away from switching nodes and high-current return paths. Place input filtering or clamp components close to the pins when the source can include transients. Keep the output path separate from sensitive inputs to prevent feedback through board capacitance, and use a solid ground reference for both comparator channels. Confirm pin functions against the manufacturer package drawing before final routing because TO-5 lead assignments must be treated as exact.
Maklumat Kesediaan
The visible manufacturer and distributor information does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because the product is not identified as an automotive-qualified variant.
