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Diodes Incorporated ZXRE1004DFTA
- Part No.:
- ZXRE1004DFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE1004DFTA.pdf
- Description:
- IC VREF SHUNT 1% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
ZXRE1004DFTA from Diodes Incorporated is a 1.22 V bandgap voltage reference IC with 1% initial tolerance, 4 µA typical knee current, and 20 ppm/°C typical temperature coefficient in SOT23 package. It operates over 8 µA–20 mA supply current and delivers stable reference voltage for precision analog signal chains in portable battery-powered systems.
For engineers reviewing the ZXRE1004DFTA datasheet, ZXRE1004DFTA pinout, ZXRE1004DFTA application, or ZXRE1004DFTA equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, capacitive-load stability, and compatibility with legacy 3-pin TO-92 references in space-constrained PCB layouts.
Technical Context
The ZXRE1004DFTA implements a two-terminal shunt-mode bandgap reference topology, requiring external current source biasing. Its internal circuitry achieves unconditional stability with load capacitance up to 10 nF without oscillation-critical for ADC reference inputs and low-noise sensor front-ends.
It maintains ±1% output accuracy across –40°C to +85°C ambient, with reverse breakdown voltage tightly specified at 1.22 V (±1%) at 100 µA test current. Dynamic impedance remains below 0.6 Ω at 1 mA, enabling fast transient response in closed-loop regulation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V ±1% at 100 µA - defines absolute accuracy of analog-to-digital conversion and sensor calibration. |
| Knee Current | 4 µA typical - minimum bias current needed to establish regulation; enables operation from micro-power sources. |
| Tempco | 20 ppm/°C typical - limits reference drift to ±1.7 mV over full industrial temperature range. |
| Operating Current Range | 8 µA to 20 mA - supports wide dynamic headroom for varying load conditions and supply rail constraints. |
| Dynamic Impedance | 0.2–0.6 Ω at 1 mA - ensures minimal voltage perturbation during fast current transients in precision measurement paths. |
| Wideband Noise | 60 µV(rms), 10 Hz–10 kHz - contributes <0.05% error floor in 16-bit ADC applications with proper filtering. |
Pinout & Package
SOT23-3 package (JEDEC MO-178AA), 2.8 mm × 2.64 mm footprint, 1.12 mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Input) | Connected to current source; reverse-biased terminal where regulated voltage develops across device. |
| Pin 2 | Cathode (Output/GND) | Reference output node; tied to system ground; voltage measured between Pin 1 and Pin 2. |
| Pin 3 | NC / Floating | No internal connection; may be left unconnected or tied to Pin 2 for mechanical stability per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low knee current | 4 µA typical enables direct use with high-value bias resistors (>1 MΩ) from 3.3 V rails, reducing power overhead in always-on monitoring circuits. |
| Unconditional capacitive-load stability | Stable with ≥10 nF output capacitance-eliminates need for external isolation resistors in ADC reference buffers. |
| Pin-compatible replacement | Direct drop-in substitute for REF1004, LT1004, and LM185/385 series in SOT23 footprint-simplifies legacy design refresh. |
| Tight thermal drift control | 20 ppm/°C typical TC ensures reference error stays within ±0.02% over full operating temperature range. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and coin-cell battery life target >1 year. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing stable 1.22 V reference for ADC full-scale calibration. Use Value: 4 µA knee current extends battery life by minimizing quiescent drain; 1% tolerance avoids factory recalibration. | Use Scenario: Industrial sensor node measuring thermocouple output with cold-junction compensation. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain-setting and ADC reference input. Use Value: 20 ppm/°C tempco limits measurement drift to <0.1°C error over –20°C to +70°C ambient. |
| Portable Communication Devices | Test & Calibration Equipment |
Use Scenario: Bluetooth LE audio transmitter module requiring accurate DAC reference for line-level analog output. IC Role / Device Role / Timing Role: Low-noise voltage reference for 12-bit DAC core in RF subsystem. Use Value: 60 µV(rms) broadband noise ensures SNR > 80 dB; SOT23 footprint saves board area in compact RF modules. | Use Scenario: Benchtop digital multimeter with auto-ranging and 5½-digit resolution. IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 0.6 Ω dynamic impedance prevents settling errors during rapid range switching; 8–20 mA operating range accommodates varying integrator loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF1004CMX-1.2 | 1.2 V nominal, 0.5% tolerance, 35 ppm/°C max TC, 5 µA knee current | Higher initial accuracy but looser thermal drift; requires tighter thermal management | Preferred when absolute accuracy at 25°C outweighs temperature stability requirements |
| LT1004CZ-1.2 | 1.2 V nominal, 1% tolerance, 50 ppm/°C max TC, 10 µA knee current | Higher knee current increases power consumption; wider tempco reduces usable temperature span | Acceptable for cost-sensitive designs where 50 ppm/°C drift is acceptable and board space allows larger SO-8 |
Compared with REF1004CMX-1.2 and LT1004CZ-1.2, the ZXRE1004DFTA offers superior thermal stability (20 vs. 35/50 ppm/°C) and lower operating current (4 vs. 5/10 µA), making it optimal for battery-critical, wide-temperature applications despite its 1% tolerance.
Availability
ZXRE1004DFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with known lifecycle status.
Supply support for ZXRE1004DFTA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in certified facilities worldwide.
The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and energy-constrained systems.
FAQ
What is the recommended external bias resistor value for ZXRE1004DFTA at 3.3 V supply?
At 3.3 V supply, a 510 kΩ resistor delivers ~4.1 µA bias current-just above the 4 µA typical knee current-ensuring reliable regulation while minimizing power draw. For improved temperature stability, use a 1% metal-film resistor with <100 ppm/°C TCR.
Can ZXRE1004DFTA drive an ADC reference input directly without a buffer amplifier?
Yes-it can drive typical SAR ADC reference inputs (e.g., AD7980, ADS8688) directly when output capacitance ≤10 nF and source impedance <1 Ω. Its 0.6 Ω dynamic impedance and unconditional stability eliminate need for external isolation resistors in most 12–16 bit designs.
Is ZXRE1004DFTA qualified for automotive applications?
No-ZXRE1004DFTA is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives such as the AP4310Q (AEC-Q100 Grade 1) for safety-critical vehicle systems; contact Diodes technical support for qualified replacements.
How does the 1% tolerance affect system calibration in a 16-bit ADC design?
A 1% reference tolerance introduces ±12.3 LSB error at full scale for a 16-bit ADC referenced to 1.22 V. This is typically compensated via one-time factory calibration or software trimming; the low tempco (20 ppm/°C) ensures post-calibration drift remains <±0.5 LSB over –40°C to +85°C.
ZXRE1004DFTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 8 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE1004DFTA FAQ
1.How can I place an order for ZXRE1004DFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004DFTA 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 ZXRE1004DFTA reliable?
The price and inventory of ZXRE1004DFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004DFTA is usually 5 days.
3.What payment methods are accepted for ZXRE1004DFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004DFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004DFTA?
ZXRE1004DFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004DFTA 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 ZXRE1004DFTA?
For technical support, including ZXRE1004DFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004DFTA requirements.
6.How does Aetrix verify that ZXRE1004DFTA is sourced from the original manufacturer or authorized distributors?
All ZXRE1004DFTA 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 ZXRE1004DFTA meets industry standards.
7.What is the process for return or replacement of ZXRE1004DFTA?
All ZXRE1004DFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004DFTA, 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 ZXRE1004DFTA part is unused and in its original packaging.
Return procedure for ZXRE1004DFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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