Texas Instruments LM4040D10IDCKR

Overview

LM4040D10IDCKR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current in the SC-70-5 package. It serves as a low-drift, low-noise voltage基准 in high-resolution ADC/DAC biasing and sensor signal conditioning circuits.

For engineers reviewing the LM4040D10IDCKR datasheet, LM4040D10IDCKR pinout, LM4040D10IDCKR application, or LM4040D10IDCKR equivalent, key selection criteria include guaranteed 10V output tolerance over –40°C to 85°C, no-output-capacitor stability, and compatibility with space-constrained portable instrumentation designs.

Technical Context

The LM4040D10IDCKR operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 10V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves D-grade accuracy without external components, and it remains stable under all capacitive loads due to inherent low dynamic impedance (≤1.1Ω at 1mA).

It features a three-pin SC-70 package with dedicated cathode, anode, and two no-connect terminals - enabling compact layout while isolating sensitive reference nodes from PCB noise. Thermal hysteresis is limited to 0.08%, and long-term stability is 120ppm over 1000 hours at 25°C.

Key Specifications

Pinout & Package

LM4040D10IDCKR is packaged in a 5-pin SC-70 (DCK) outline measuring 2.00mm × 1.25mm. The package includes two no-connect (NC) pins to enhance isolation and reduce parasitic coupling in high-precision layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050C10IDBZR and MAX6012AEUR+T, the LM4040D10IDCKR trades initial accuracy and noise for ultra-low minimum current, SC-70 noise-isolation layout advantages, and guaranteed operation to 85°C in a cost-sensitive D-grade specification.

Availability

LM4040D10IDCKR is available at Aetrix Electronics and suitable for high-resolution data acquisition, industrial field transmitters, and portable precision audio requiring stable component supply with consistent parametric performance across production lots.

Supply support for LM4040D10IDCKR 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.

The LM4040 series was developed for cost-sensitive, space-constrained applications demanding stable voltage references without external compensation - especially in portable instrumentation, industrial sensors, and energy infrastructure monitoring.

FAQ

What is the maximum operating temperature range for LM4040D10IDCKR?

The LM4040D10IDCKR is characterized for operation from –40°C to +85°C (industrial temperature range). It is not rated for the extended –40°C to +125°C range; that specification applies only to Q-grade variants like LM4040D10QDBZR. Always verify ambient temperature limits against the specific orderable part number.

Can LM4040D10IDCKR operate without an output capacitor?

Yes, the LM4040D10IDCKR is designed to be stable with all capacitive loads and requires no output capacitor for proper operation. This eliminates a common source of phase-margin degradation and simplifies layout in noise-sensitive analog circuits where the LM4040D10IDCKR serves as a reference.

What does the 'D' in LM4040D10IDCKR indicate?

The 'D' denotes the accuracy grade: LM4040D10IDCKR has ±1.0% initial output voltage tolerance at 25°C and a maximum temperature coefficient of 150ppm/°C. This grade balances cost and performance for applications where sub-0.5% accuracy is not required but predictable drift behavior is essential.

How is the cathode current (IZ) calculated for LM4040D10IDCKR in a typical circuit?

In a standard shunt configuration, IZ = (VS – 10V) / RS, where VS is the unregulated supply voltage and RS is the series current-setting resistor. For reliable operation, IZ must stay within 45μA (min) and 15mA (max); for example, with VS = 15V, RS must be between 333Ω and 111kΩ to keep LM4040D10IDCKR active and stable.

Is LM4040D10IDCKR pin-compatible with other LM4040 variants in SC-70?

Yes - all LM4040x10IDCKR variants (A/B/C/D grades) share identical SC-70-5 pinout and package dimensions. Only electrical parameters differ: initial accuracy, temperature coefficient, and dynamic impedance. System-level validation is still required due to differing min current and noise specs.