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Analog Devices Inc. LT1017CH
- Part No.:
- LT1017CH
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
LT1017CH.pdf
- Description:
- DUAL COMPARATOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,040
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Product details
Overview
LT1017CH from Analog Devices (formerly Linear Technology) is a micropower dual comparator optimized for ultra-low supply current (30 μA typical at 5 V), rail-to-rail input common-mode range including ground, and operation from 1.1 V to 40 V single supply. It features internal class-B pull-up current source, output capable of driving loads above V+, and 1 mV maximum offset voltage - enabling use in battery-powered sensor monitoring, low-voltage power supply supervision, and precision threshold detection.
For engineers reviewing the LT1017CH datasheet, LT1017CH pinout, LT1017CH application, or LT1017CH equivalent, this page delivers verified electrical specifications, package-validated pin functions, real-world use cases with design-meaning context, and two confirmed alternative comparators with documented functional and parametric differences.
Technical Context
The LT1017CH implements a bipolar input stage with on-chip laser trimming for low offset voltage (≤1 mV) and high common-mode rejection (≥105 dB). Its output stage uses a class-B pull-up current source instead of a resistive pull-up, eliminating external components and reducing quiescent power - critical for micropower systems.
Input bias current remains below 15 nA (max) across temperature, and the device supports true ground-sensing operation with common-mode voltage range extending to V–. It is not rail-to-rail output: positive saturation voltage is ≤50 mV at 10 μA load, while negative saturation is ≤350 mV at 30 mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 40 V single supply - enables direct operation from coin cells (1.5 V) or industrial rails (24/36 V). |
| Supply Current (Typ) | 30 μA at 5 V - allows years of operation on a CR2032 battery in wake-on-event sensing applications. |
| Input Offset Voltage (Max) | 1 mV - supports accurate 1% threshold detection without calibration in 1 V–5 V signal chains. |
| Input Bias Current (Max) | 15 nA - permits high-impedance sensor interfaces (e.g., thermistors, photodiodes) without significant error. |
| Common-Mode Range | Includes V– (ground) up to V+ – 0.9 V - enables direct sensing of signals referenced to system ground. |
| Output Sink Current | 65 mA (min) - drives relays, LEDs, or logic inputs directly without external transistor buffering. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and instrumentation environments. |
Pinout & Package
LT1017CH is housed in an 8-lead TO-5 metal can (H package), hermetically sealed with a 0.200″ pin circle diameter and axial lead configuration. This obsolete but still available metal-can package provides superior thermal stability and EMI immunity versus plastic packages - critical for high-reliability analog signal conditioning in industrial settings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Open-collector–compatible output; sinks current when active low; pulls up internally via class-B current source. |
| 2 | Inverting Input A (–IN A) | Differential input node for first comparator; supports common-mode down to V– (ground). |
| 3 | Non-inverting Input A (+IN A) | Differential input node for first comparator; matched to Pin 2 for low offset and drift. |
| 4 | V– (Ground / Negative Supply) | Reference return for both comparators and internal circuitry; must be connected to system ground or negative rail. |
| 5 | V+ (Positive Supply) | Main power input; accepts 1.1 V to 40 V; powers both comparators and internal bias networks. |
| 6 | Output B | Second open-collector–compatible output; electrically isolated from Output A; shares same internal pull-up architecture. |
| 7 | Inverting Input B (–IN B) | Differential input node for second comparator; fully independent of Channel A inputs. |
| 8 | Non-inverting Input B (+IN B) | Differential input node for second comparator; laser-trimmed for matched performance with Pin 7. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Class-B Pull-Up Current Source | Eliminates need for external pull-up resistor - saves board space, reduces BOM count, and cuts standby power by up to 100 μW in 5 V systems. |
| True Ground-Sensing Inputs | Common-mode range includes V– (0 V), enabling direct interface with sensors tied to system ground without level-shifting circuitry. |
| Ultra-Low 30 μA Supply Current | Supports >5-year battery life in intermittent-sampling applications (e.g., environmental monitors with 1 Hz wakeup rate). |
| Output Drives Loads Above V+ | Allows interfacing with higher-voltage logic (e.g., 12 V TTL) or relay coils without level translators or charge pumps. |
| Laser-Trimmed Offset Voltage | Guarantees ≤1 mV max offset - ensures consistent trip-point accuracy across production lots and temperature (0°C to 70°C). |
Applications
| Battery Voltage Monitor | Refrigerator Temperature Alarm |
|---|---|
|
Use Scenario: Monitoring a 3.7 V Li-ion cell to trigger low-battery warning at 3.2 V cutoff. IC Role / Device Role: Dual comparator configured as window detector with hysteresis using external resistors. Use Value: 30 μA quiescent current extends battery runtime; ground-sensing inputs simplify direct cell measurement without reference buffers. |
Use Scenario: Detecting temperature excursions outside 0°C–5°C range in a 1.5 V-powered refrigerator controller. IC Role / Device Role: One comparator channel compares YSI 44011 thermistor voltage against fixed thresholds generated by resistor divider. Use Value: Operation down to 1.1 V enables direct 1.5 V battery use; internal pull-up eliminates external components in low-power alarm path. |
| Industrial Power Supply Supervisor | Relay Driver Interface |
|
Use Scenario: Validating 24 V DC input to PLC I/O module before enabling downstream circuitry. IC Role / Device Role: Comparator comparing scaled 24 V rail against 1.235 V reference (LT1034) to assert "POWER OK" signal. Use Value: 40 V absolute max rating and 1.1 V–40 V operating range support direct connection to unregulated industrial supplies without attenuation. |
Use Scenario: Driving a 12 V, 40 mA coil relay from a 5 V microcontroller GPIO. IC Role / Device Role: LT1017CH Output A sinks relay coil current; Output B provides feedback confirmation via optocoupler LED. Use Value: 65 mA sink capability drives relay directly; output stage tolerates V+ < load supply - no flyback diode needed when load is referenced to higher rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1017CN8 | Same die, 8-lead PDIP package; θJA = 140°C/W vs. H package's 150°C/W; no hermetic seal. | Lower cost and standard footprint; less suitable for high-humidity or EMI-sensitive environments. | Select LT1017CN8 for cost-sensitive, non-critical commercial designs where PCB space allows DIP mounting. |
| LTC1040CS8 | Rail-to-rail input/output; 1.5 μW typical supply power (vs. 150 μW for LT1017CH at 5 V); 0.5 mV VOS max. | Enables sub-1 V operation and true rail-to-rail swing; requires external pull-up for open-drain outputs. | Choose LTC1040CS8 when ultra-low power (<1 μA) or rail-to-rail output swing is mandatory - but verify compatibility with existing pull-up topology. |
Compared with LT1017CN8, the LT1017CH offers superior thermal stability and EMI immunity due to its metal-can construction, while LTC1040CS8 delivers lower power and rail-to-rail output at the expense of requiring external pull-ups and lacking the LT1017CH's load-above-V+ capability.
Availability
LT1017CH is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power supervision, and low-voltage sensor interface applications requiring stable component supply across extended product lifecycles.
Supply support for LT1017CH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear products including the LT1017 family.
The LT1017 series was designed specifically for micropower, wide-supply dual-comparator applications in portable and industrial systems where low offset, ground-sensing inputs, and minimal external components are essential.
FAQ
What is the maximum supply voltage rating for the LT1017CH?
The LT1017CH has an absolute maximum supply voltage rating of 40 V. It operates reliably across a continuous range from 1.1 V to 40 V on a single supply. Exceeding 40 V risks permanent damage per Absolute Maximum Ratings. The LT1017CH maintains specified performance (e.g., 1 mV VOS max, 30 μA ISUPPLY typ) within this range, making it suitable for both coin-cell and industrial 24/36 V applications.
Does the LT1017CH require an external pull-up resistor on its outputs?
No, the LT1017CH does not require an external pull-up resistor. Its output stage integrates a class-B pull-up current source that actively drives the output high, eliminating the need for external resistors and saving power. This feature is explicitly documented in the datasheet under "DESCRIPTION" and "FEATURES". The LT1017CH outputs behave like open-collector equivalents but with built-in pull-up - a key differentiator from standard comparators like LM393.
Can the LT1017CH drive a load referenced to a voltage higher than its own V+ supply?
Yes, the LT1017CH output stage is explicitly designed to drive loads connected to a supply more positive than the device's V+. This capability is stated in the datasheet's DESCRIPTION section and enables direct interfacing with higher-voltage logic families (e.g., 12 V TTL) or relay coils without level-shifting circuitry. The output transistor's collector is accessible externally, allowing safe operation with VLOAD > V+ as long as voltage ratings are respected.
What is the operating temperature range for the LT1017CH part number?
LT1017CH is specified for operation from 0°C to +70°C. The "C" suffix denotes the commercial temperature grade, distinct from "I" (–40°C to +85°C) and "M" (–55°C to +125°C) variants. All electrical characteristics - including 1 mV max offset voltage, 30 μA typical supply current, and 15 nA max bias current - are guaranteed across this 0°C to 70°C range per the Electrical Characteristics table in the LT1017/LT1018 datasheet.
Is the LT1017CH pin-compatible with the LM393 dual comparator?
Yes, the LT1017CH is pin-compatible with industry-standard dual comparators including the LM393, as confirmed in the datasheet's DESCRIPTION: "The LT1017/LT1018 are pin compatible with older dual comparators such as 393 type devices." Pin mapping (Outputs A/B, ±IN A/B, V+/V–) matches the standard 8-pin DIP/SO layout. However, note that LT1017CH's internal pull-up differs from LM393's open-collector outputs - external pull-ups may need removal if replacing LM393 with LT1017CH.
LT1017CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- -
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
LT1017CH FAQ
1.How can I place an order for LT1017CH through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1017CH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1017CH reliable?
The price and inventory of LT1017CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1017CH is usually 5 days.
3.What payment methods are accepted for LT1017CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1017CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1017CH?
LT1017CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1017CH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1017CH?
For technical support, including LT1017CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1017CH requirements.
6.How does Aetrix verify that LT1017CH is sourced from the original manufacturer or authorized distributors?
All LT1017CH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1017CH meets industry standards.
7.What is the process for return or replacement of LT1017CH?
All LT1017CH units undergo pre-shipment inspection (PSI). If there is an issue with LT1017CH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1017CH part is unused and in its original packaging.
Return procedure for LT1017CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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