My Inquiry
My Account
Texas Instruments LT1009CDRG4
- Part No.:
- LT1009CDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1009CDRG4.pdf
- Description:
- IC VREF SHUNT 0.4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,917
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1009CDRG4 from Texas Instruments is a precision 2.5-V shunt voltage reference IC in SOIC-8 package, featuring ±10 mV initial tolerance (±0.4%), 0.6 Ω max dynamic impedance at 1 mA, and 15 ppm/°C typical temperature coefficient over 0°C to 70°C. It operates as a three-terminal adjustable reference with ANODE, CATHODE, and ADJ pins, used in ADC/DAC references and power-supply monitors.
For engineers reviewing the LT1009CDRG4 datasheet, LT1009CDRG4 pinout, LT1009CDRG4 application, or LT1009CDRG4 equivalent, this page delivers verified electrical specs, validated SOIC-8 terminal mapping, confirmed 2.5-V reference use cases, and two rigorously cross-checked alternative parts for system-level design and BOM optimization.
Technical Context
The LT1009CDRG4 implements a bandgap-derived shunt reference architecture with on-chip laser trimming to achieve tight initial voltage accuracy and minimized αVZ drift. Its ADJ terminal enables ±5% output adjustment without degrading temperature coefficient performance.
It functions within a 400 µA–10 mA cathode current range, maintains stable regulation down to 2.5 V input headroom, and delivers low 10 µV/√Hz wideband noise at 1 kHz-enabling high-resolution analog systems where reference stability directly impacts measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.500 V nominal at IZ = 1 mA; supports precise 2.5-V system biasing with ≤±10 mV error across 0°C–70°C. |
| Initial Tolerance | ±10 mV (±0.4%) for D/PW packages; eliminates need for external calibration in mid-accuracy data converters. |
| Dynamic Impedance | 0.6 Ω max at 1 mA; ensures minimal output voltage shift under load transients in feedback loops. |
| Temp Coefficient | 15 ppm/°C typical (0°C–70°C); guarantees ≤±1.05 mV drift over full operating range. |
| Adjustment Range | ±5% via ADJ pin; allows fine-tuning to compensate for PCB trace resistance or system gain errors. |
| Long-Term Drift | 20 ppm/khr at 25°C; supports >10-year stability in industrial instrumentation without recalibration. |
| Operating Current | 400 µA–10 mA cathode current; compatible with low-power microcontrollers and high-current regulators alike. |
Pinout & Package
LT1009CDRG4 uses an 8-pin SOIC (D) package per JEDEC MS-012, AA variant, with 1.75 mm max height and 1.27 mm lead pitch. Pin 1 is located at top-left corner with notch marking; device is not pin-compatible with TO-92 or TSSOP variants of LT1009.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6 | NC | No internal connection; must be left unconnected or tied to GND per layout guidelines. |
| 4 | ANODE | Reference ground node; connects to system GND or negative rail in floating configurations. |
| 5, 7 | CATHODE | Main current path; sinks regulated current to set output voltage at external resistor divider. |
| 8 | ADJ | Voltage adjustment input; enables ±5% reference tuning by injecting current into this node. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip laser trimming | Enables ±10 mV initial tolerance without external calibration components or manual trim pots. |
| Three-terminal adjustability | ADJ pin permits ±5% output tuning while preserving temperature coefficient integrity. |
| Low dynamic impedance | 0.6 Ω max ensures <1 mV output variation under 10 mA load steps-critical for DAC buffer stability. |
| Wide cathode current range | Operates reliably from 400 µA to 10 mA, supporting both ultra-low-power sensors and high-current regulators. |
| Direct LM136-2.5 replacement | Terminal-for-terminal compatible with LM136-2.5 in SOIC-8, enabling drop-in upgrade without PCB changes. |
Applications
| ADC Reference | DAC Reference |
|---|---|
Use Scenario: 8-bit successive-approximation ADC requiring stable 2.5-V reference for full-scale conversion. IC Role / Device Role / Timing Role: Shunt reference providing fixed 2.5-V bias to ADC's VREF+ input. Use Value: ±10 mV initial tolerance ensures ≤0.4% full-scale error; low dynamic impedance prevents code jitter during sampling. |
Use Scenario: Precision DAC generating calibrated analog outputs for sensor excitation or actuator control. IC Role / Device Role / Timing Role: Voltage reference source for DAC's internal scaling circuitry. Use Value: 15 ppm/°C tempco limits output drift to <±1 LSB over industrial temperature range. |
| Power-Supply Monitor | Current-Loop Transmitter |
Use Scenario: Overvoltage detection in 5-V rail using comparator with LT1009CDRG4 as threshold reference. IC Role / Device Role / Timing Role: Stable 2.5-V reference for comparator hysteresis and trip-point setting. Use Value: Low long-term drift (20 ppm/khr) ensures consistent fault detection over product lifetime. |
Use Scenario: 4–20 mA transmitter where reference voltage sets loop current via sense resistor. IC Role / Device Role / Timing Role: Precision voltage source defining current magnitude in feedback path. Use Value: ±5% ADJ capability compensates for resistor tolerance and PCB trace resistance errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM136-2.5 | Same 2.5-V nominal output but ±1% initial tolerance (25 mV), higher 10 Ω dynamic impedance, no ADJ pin. | Lacks ±5% adjustment; requires external trim network for system-level calibration. | Select when cost sensitivity outweighs accuracy needs and ADJ functionality is unnecessary. |
| TL431ACDR | 2.495 V nominal, ±1% tolerance, 0.22 Ω dynamic impedance, adjustable via resistor divider (no dedicated ADJ pin). | Requires external resistors for adjustment; lower tempco (50 ppm/°C) but higher initial error. | Choose for higher current capability (up to 100 mA) and tighter dynamic impedance where board space allows divider network. |
Compared with LM136-2.5 and TL431ACDR, the LT1009CDRG4 uniquely combines sub-0.5% initial accuracy, integrated ADJ terminal, and <1 Ω dynamic impedance-making it optimal for compact, high-stability 2.5-V reference designs where external trim components must be avoided.
Availability
LT1009CDRG4 is available at Aetrix Electronics and suitable for precision ADC/DAC references, power-supply monitoring circuits, and current-loop transmitter designs requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for LT1009CDRG4 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-reliability manufacturing.
The LT1009 series was engineered specifically for high-accuracy, low-drift voltage referencing in industrial instrumentation, test equipment, and data acquisition systems-prioritizing long-term stability and ease of integration over raw speed or power efficiency.
FAQ
What is the maximum cathode current rating for LT1009CDRG4?
The LT1009CDRG4 supports a maximum cathode current of 10 mA under recommended operating conditions. Exceeding this value risks thermal overstress due to its SOIC-8 package thermal impedance of 97 °C/W, potentially degrading long-term stability or causing permanent damage if junction temperature exceeds 150 °C. Always verify power dissipation (P = VZ × IZ) against ambient temperature and PCB copper area.
Can LT1009CDRG4 replace LM136-2.5 without PCB modifications?
Yes, LT1009CDRG4 is explicitly designed as a terminal-for-terminal replacement for LM136-2.5 in SOIC-8 packages. Both share identical pinout (ANODE, CATHODE, NC configuration), same footprint, and compatible voltage/current specifications. No PCB layout changes are required-only benefit from improved initial tolerance (±0.4% vs ±1%) and built-in ADJ functionality.
How does the ADJ pin function in LT1009CDRG4?
The ADJ pin on LT1009CDRG4 allows ±5% adjustment of the 2.5-V reference output by injecting or sinking current-typically via a potentiometer between ADJ and ANODE. This adjustment occurs without altering the temperature coefficient, as confirmed in TI's datasheet Figure 8. The ADJ pin draws negligible current (<100 nA), making it compatible with high-impedance control networks.
What is the long-term stability specification for LT1009CDRG4?
LT1009CDRG4 exhibits a long-term drift of 20 ppm per kilohour at 25°C under IZ = 1 mA bias. This translates to approximately ±0.05% voltage change over 5 years of continuous operation-critical for applications like calibration equipment or medical devices where field recalibration is impractical or costly.
Is LT1009CDRG4 RoHS compliant and lead-free?
Yes, LT1009CDRG4 is RoHS compliant with lead finish NIPDAU (nickel-palladium-gold) and meets JEDEC Level-1 moisture sensitivity requirements. Its SOIC-8 package is rated for peak reflow temperatures up to 260°C, supporting standard lead-free soldering processes without reliability degradation.
LT1009CDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LT1009CDRG4 FAQ
1.How can I place an order for LT1009CDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1009CDRG4 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 LT1009CDRG4 reliable?
The price and inventory of LT1009CDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1009CDRG4 is usually 5 days.
3.What payment methods are accepted for LT1009CDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1009CDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1009CDRG4?
LT1009CDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1009CDRG4 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 LT1009CDRG4?
For technical support, including LT1009CDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1009CDRG4 requirements.
6.How does Aetrix verify that LT1009CDRG4 is sourced from the original manufacturer or authorized distributors?
All LT1009CDRG4 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 LT1009CDRG4 meets industry standards.
7.What is the process for return or replacement of LT1009CDRG4?
All LT1009CDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LT1009CDRG4, 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 LT1009CDRG4 part is unused and in its original packaging.
Return procedure for LT1009CDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1009CDRG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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…
