Analog Devices Inc. LT1236CCS8-10#PBF

Overview

LT1236CCS8-10#PBF from Analog Devices (acquired Linear Technology) is a precision 10V voltage reference IC featuring ultra-low 15ppm/°C max temperature coefficient, 0.01% (100ppm) initial accuracy, and <6µV_P-P (0.1Hz–10Hz) output noise. It operates in both series and shunt modes, sources/sinks ±10mA, and delivers stable 10V output for high-resolution ADC/DAC calibration in test equipment and inertial navigation systems.

For engineers reviewing the LT1236CCS8-10#PBF datasheet, LT1236CCS8-10#PBF pinout, LT1236CCS8-10#PBF application, or LT1236CCS8-10#PBF equivalent, key selection criteria include its 10V output stability under load/line variation, buried zener architecture enabling low hysteresis (<5ppm), and SO-8 package compatibility with AD586/AD587 footprints for drop-in replacement in legacy precision analog designs.

Technical Context

The LT1236CCS8-10#PBF uses a subsurface buried zener diode structure-eliminating surface-breakdown noise and drift-to achieve superior long-term stability (30ppm/1000hrs) and thermal hysteresis performance (<5ppm). Its dual-mode operation (series/shunt) enables flexible system integration: as a 3-terminal series reference with 1V min input-output differential, or as a 2-terminal shunt regulator with 1.5mA min current requirement.

Unlike bandgap references, it avoids on-chip heaters while maintaining 2–5ppm/°C typical TC across grades; the "C" grade specifies 10–15ppm/°C max over 0°C to 70°C. Trim pin functionality (12kΩ impedance, 70:1 attenuation) allows ±10mV fine adjustment of the 10V output without degrading TC beyond 1ppm/°C in the "A" variant-though the "C" grade supports full ±0.7% trim range.

Key Specifications

Pinout & Package

LT1236CCS8-10#PBF is housed in an 8-lead plastic SOIC (SO-8) package with standard JEDEC MS-012AC dimensions (3.9mm × 4.9mm × 1.75mm). Pins 1, 3, 4, 6, and 7 are internally connected NC terminals-no external circuitry should be attached. Pin 5 is the TRIM terminal for output voltage adjustment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with LT1236CCS8-10#PBF, ADR441BRZ offers tighter TC and noise but demands more input headroom and new layout, while REF5010AIDR provides enable functionality and lower quiescent current at the cost of non-compatible pinout-making LT1236CCS8-10#PBF optimal for cost-sensitive, drop-in upgrades of legacy AD586-based systems.

Availability

LT1236CCS8-10#PBF is available at Aetrix Electronics and suitable for high-precision data acquisition, inertial navigation systems, and digital voltmeter designs requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LT1236CCS8-10#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LT1236 family was developed by Linear Technology (acquired by ADI in 2017) to deliver ultra-stable, low-noise voltage references for metrology and precision instrumentation-leveraging buried zener technology to surpass bandgap performance without heater power.

FAQ

What is the maximum load current LT1236CCS8-10#PBF can source or sink while maintaining regulation?

LT1236CCS8-10#PBF can source or sink up to ±10mA while maintaining specified line and load regulation. At 10mA sourcing, output voltage changes by ≤250µV (25ppm/mA); sinking 10mA induces ≤1mV shift (100ppm/mA). Exceeding 10mA risks loss of regulation or thermal shutdown-external boost transistors are recommended for >10mA loads.

Can LT1236CCS8-10#PBF operate as a two-terminal shunt reference, and what is the minimum current required?

Yes, LT1236CCS8-10#PBF supports shunt mode operation with VIN open. In this configuration, it requires a minimum shunt current of 1.5mA to maintain regulation-verified across 0°C to 70°C. The device exhibits 50–150ppm/mA shunt load regulation, making it suitable for precision shunt regulator applications where input voltage varies widely.

What is the purpose of the TRIM pin on LT1236CCS8-10#PBF, and how is it used?

The TRIM pin (Pin 5) on LT1236CCS8-10#PBF enables fine adjustment of the 10V output with 70:1 attenuation and 12kΩ input impedance. A 10kΩ potentiometer between VOUT and GND yields ±10mV trim range. For the "C" grade, full ±0.7% adjustment is supported; trimming affects TC by <1ppm/°C when using low-impedance drive (<3kΩ), preserving long-term stability.

How does LT1236CCS8-10#PBF compare to bandgap references in terms of long-term stability and noise?

LT1236CCS8-10#PBF achieves 30ppm/1000hrs long-term stability and <6µV_P-P (0.1–10Hz) noise-significantly better than typical bandgap references (e.g., 50–100ppm/1000hrs, >10µV_P-P). This results from its buried zener structure, which eliminates surface degradation mechanisms and thermoelectric noise sources inherent in bandgap topologies.

Is LT1236CCS8-10#PBF pin-compatible with AD586 or AD587, and what does that mean for design migration?

Yes, LT1236CCS8-10#PBF is pin-compatible with AD586 and AD587 in SO-8 packages-same VIN, GND, VOUT, and TRIM pin locations. This allows direct replacement in existing layouts without PCB modification, enabling immediate performance upgrades (lower TC, noise, and hysteresis) while retaining legacy design validation and qualification.