My Inquiry
My Account
Analog Devices Inc. LTC1046MJ8
- Part No.:
- LTC1046MJ8
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LTC1046MJ8.pdf
- Description:
- IC REG 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,444
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1046MJ8 from Analog Devices is a 50mA monolithic CMOS switched-capacitor voltage converter optimized for 1.5V–6V input operation, providing inverting (VOUT = –VIN), halving (VOUT = VIN/2), and multiplying (±nVIN) functions. It delivers 50mA output current with 27Ω max output resistance at 5V input and operates across –55°C to +125°C. Used in precision analog supply splitting and battery-powered instrumentation.
For engineers reviewing the LTC1046MJ8 datasheet, LTC1046MJ8 pinout, LTC1046MJ8 application, or LTC1046MJ8 equivalent, key selection criteria include its wide temperature range (–55°C to +125°C), CERDIP hermetic package, 97% open-circuit voltage conversion efficiency, 300μA no-load supply current, and compatibility with ICL7660/LTC1044 footprints in high-reliability systems.
Technical Context
The LTC1046MJ8 implements a four-phase switched-capacitor topology with internal CMOS switches and a self-oscillating control circuit. Its BOOST pin (Pin 1) enables frequency scaling up to 3× nominal by increasing charge/discharge current, directly reducing output impedance and ripple under load.
It features dual-mode oscillator control: internal free-running mode (via OSC pin capacitance) or external clock synchronization. The LV pin (Pin 6) is internally shorted to GND when V+ ≥ 3V, simplifying biasing in 5V systems while maintaining full functionality down to 1.5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 50mA maximum - supports rail-splitting and dual-supply generation for op-amps and ADCs without external regulators. |
| Supply Voltage Range | 1.5V to 6V - enables direct use with single-cell Li-ion, NiMH, or regulated 3.3V/5V rails. |
| Output Resistance | 27Ω maximum at V+ = 5V, IL = 50mA - defines voltage droop under load; lower than ICL7660 (55Ω) for improved regulation. |
| No-Load Supply Current | 300μA maximum at 5V - ensures low quiescent power in always-on sensor nodes and portable instruments. |
| Voltage Conversion Efficiency | 97% minimum open-circuit - minimizes energy loss in unregulated charge-pump topologies. |
| Operating Temperature | –55°C to +125°C - qualified for military, aerospace, and downhole industrial applications requiring extended thermal robustness. |
| Oscillator Frequency | 20–30kHz typical at V+ = 5V - balances switching loss vs. capacitor size; adjustable via BOOST pin or external COSC. |
Pinout & Package
Package: 8-Lead CERDIP (J8), hermetically sealed ceramic dual in-line package with 0.300-inch width, rated for –55°C to +125°C operation and 160°C junction max. Designed for high-reliability, long-lifetime deployments where moisture ingress or thermal cycling must be mitigated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pin 8) | Positive supply input | Accepts 1.5V–6V; powers internal logic and switch drivers; determines operating voltage range and max output current capability. |
| OSC (Pin 7) | Oscillator timing node | Controls switching frequency via external capacitor; default ~30kHz at 5V; frequency scales with V+ and COSC value. |
| LV (Pin 6) | Logic reference voltage | Internally tied to GND when V+ ≥ 3V; must be externally grounded if V+ < 3V to ensure proper internal logic biasing. |
| VOUT (Pin 5) | Inverted or divided output | Delivers –VIN, VIN/2, or ±nVIN depending on external capacitor configuration; output impedance dominates load regulation. |
| BOOST (Pin 1) | Frequency boost control | When tied to V+, increases oscillator drive strength and raises fOSC ~3×, lowering ROUT and ripple for higher loads. |
| CAP+ (Pin 2) | Positive flying capacitor terminal | Connects to one side of flying capacitor (C1); carries bidirectional switching current; ESR impacts effective ROUT. |
| GND (Pin 3) | Ground reference | System ground return for logic, switches, and output; must be low-impedance to minimize noise coupling into VOUT. |
| CAP– (Pin 4) | Negative flying capacitor terminal | Connects to other side of flying capacitor (C1); phase-complementary to CAP+; critical for charge transfer integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Plug-in compatibility with ICL7660/LTC1044 | Same 8-pin DIP footprint and functional behavior-enables drop-in upgrade to 2.5× output current without PCB redesign. |
| Boost pin for dynamic frequency scaling | Pin 1 connection to V+ increases fOSC ~3×, reducing output impedance from 27Ω to ~9Ω and improving load regulation at 50mA. |
| Wide input voltage range (1.5V–6V) | Supports direct operation from single alkaline, NiMH, or LiFePO₄ cells without pre-regulation-reducing BOM count and power loss. |
| 97% open-circuit voltage conversion efficiency | Minimizes voltage error in precision divider and rail-splitter applications where output accuracy depends on unloaded VOUT stability. |
| Hermetic CERDIP packaging (J8) | Provides long-term reliability in harsh environments (high humidity, thermal shock, radiation exposure) where plastic SO or PDIP packages degrade. |
Applications
| Battery-Powered Instrumentation | Precision Analog Rail Splitting |
|---|---|
|
Use Scenario: Portable multimeters and handheld data loggers require dual ±5V supplies from a single 9V battery or 3.7V Li-ion cell. IC Role / Device Role / Timing Role: LTC1046MJ8 acts as an inverting charge pump generating –VBAT/2 and +VBAT/2 referenced to mid-rail, enabling true bipolar signal conditioning. Use Value: Delivers stable ±4.5V at 20mA with <1% droop over battery discharge (6V → 4.5V), eliminating need for discrete regulators or transformers. |
Use Scenario: High-resolution 24-bit delta-sigma ADCs (e.g., ADS127L01) require ultra-low-noise, well-matched ±2.5V analog supplies. IC Role / Device Role / Timing Role: LTC1046MJ8 configured as a precision voltage divider (VOUT = V+/2) provides symmetrical, low-impedance reference rails with matched temperature drift. Use Value: Achieves 0.002% division accuracy with <100nA load, supporting 110dB SNR performance without external trimming or feedback. |
| Military/Aerospace Power Conditioning | Legacy System Voltage Translation |
|
Use Scenario: Avionics sensors and flight control modules operate across –55°C to +125°C and require reliable –5V generation from 28V primary bus with intermediate regulation. IC Role / Device Role / Timing Role: LTC1046MJ8 serves as a secondary-stage inverter after a DC/DC converter, delivering isolated –5V for op-amp biasing and DAC references. Use Value: Hermetic J8 package ensures zero moisture-induced failure over 20+ year service life; 125°C rating avoids derating in enclosed chassis. |
Use Scenario: Industrial PLC backplanes retain legacy 5V logic but require –5V for RS-232 transceivers (e.g., MAX232) and analog front-end biasing. IC Role / Device Role / Timing Role: LTC1046MJ8 replaces obsolete ICL7660 in existing PDIP sockets, delivering 50mA instead of 20mA to support additional peripheral loads. Use Value: Pin-compatible upgrade increases available current headroom by 150%, enabling concurrent RS-232 and analog sensor excitation without supply brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1046CN8#TRPBF | Same die, 8-lead PDIP package, 0°C to 70°C temp range - lacks hermetic sealing and extended temperature capability. | Suitable only for commercial-grade equipment; not rated for storage below 0°C or operation above 70°C. | Select when cost sensitivity outweighs environmental ruggedness and lifetime reliability requirements. |
| LTC1046IS8#TRPBF | Same die, 8-lead plastic SOIC package, –40°C to +85°C - smaller footprint and reflow-compatible, but non-hermetic and lower max temp. | Preferred for space-constrained consumer or industrial boards where CERDIP's size and through-hole assembly are prohibitive. | Choose for modern SMT production lines needing RoHS-compliant, automated assembly - but verify humidity exposure limits. |
Compared with LTC1046MJ8, the CN8 offers lower cost and broader commercial availability but sacrifices military-grade temperature range and hermetic reliability; the IS8 provides surface-mount convenience and better thermal dissipation than J8 at the expense of long-term moisture resistance and extreme-temperature operation.
Availability
LTC1046MJ8 is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision analog rail splitting, military/aerospace power conditioning, and legacy system voltage translation requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for LTC1046MJ8 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC1046 product line delivers monolithic switched-capacitor voltage converters designed specifically for high-reliability, low-noise, and wide-temperature applications where inductorless power conversion is essential - especially in space-constrained or EMI-sensitive systems.
FAQ
What is the maximum operating temperature for the LTC1046MJ8?
The LTC1046MJ8 is rated for continuous operation from –55°C to +125°C, with a maximum junction temperature of 160°C. This extended range is enabled by its hermetic 8-lead CERDIP (J8) package, making it suitable for downhole tools, avionics, and other high-reliability applications where plastic or PDIP packages would fail prematurely.
Can the LTC1046MJ8 replace an ICL7660 in an existing design?
Yes, the LTC1046MJ8 is pin-for-pin and functionally compatible with the ICL7660 and LTC1044. It delivers 2.5× higher output current (50mA vs. 20mA) and lower output resistance (27Ω vs. 55Ω), allowing direct substitution in existing 8-pin DIP layouts without changes to external components or PCB traces.
How does the BOOST pin affect LTC1046MJ8 performance?
Tying the BOOST pin (Pin 1) to V+ increases the internal oscillator drive strength, raising switching frequency by approximately 3× - e.g., from ~30kHz to ~90kHz at 5V. This reduces effective output resistance and output voltage ripple, improving regulation under heavy load (e.g., 50mA) without changing external capacitors.
What is the minimum supply voltage required for LTC1046MJ8 operation?
The LTC1046MJ8 operates down to 1.5V supply voltage (V+) across its full temperature range. At 1.5V, it maintains functional inversion and division modes with reduced output current capability - verified per Electrical Characteristics table with V+L = 1.5V (min) under load conditions.
Is the LTC1046MJ8 still in active production?
The LTC1046MJ8 is marked as obsolete by Analog Devices per Rev C datasheet (05/19), with official recommendation to consider N8 (PDIP) or S8 (SOIC) variants for new designs. However, Aetrix Electronics maintains legacy inventory and offers controlled-life support including traceable sourcing and lifecycle coordination for ongoing production programs.
LTC1046MJ8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
LTC1046MJ8 FAQ
1.How can I place an order for LTC1046MJ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1046MJ8 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 LTC1046MJ8 reliable?
The price and inventory of LTC1046MJ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1046MJ8 is usually 5 days.
3.What payment methods are accepted for LTC1046MJ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1046MJ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1046MJ8?
LTC1046MJ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1046MJ8 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 LTC1046MJ8?
For technical support, including LTC1046MJ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1046MJ8 requirements.
6.How does Aetrix verify that LTC1046MJ8 is sourced from the original manufacturer or authorized distributors?
All LTC1046MJ8 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 LTC1046MJ8 meets industry standards.
7.What is the process for return or replacement of LTC1046MJ8?
All LTC1046MJ8 units undergo pre-shipment inspection (PSI). If there is an issue with LTC1046MJ8, 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 LTC1046MJ8 part is unused and in its original packaging.
Return procedure for LTC1046MJ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1046MJ8 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
