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Analog Devices Inc. LTC2301CDE#PBF
- Part No.:
- LTC2301CDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2301CDE#PBF.pdf
- Description:
- IC ADC 12BIT SAR 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
LTC2301CDE#PBF from Analog Devices (formerly Linear Technology) is a 1-channel, 12-bit successive approximation ADC with I²C-compatible serial interface, internal 2.5V reference, and fully differential sample-and-hold. It operates from a single 5V supply, achieves 1.3μs conversion time, and supports software-selectable unipolar (0–4.096V) or bipolar (±2.048V) input ranges. It is used in precision battery-powered instrumentation requiring low power and compact size.
For engineers reviewing the LTC2301CDE#PBF datasheet, LTC2301CDE#PBF pinout, LTC2301CDE#PBF application, or LTC2301CDE#PBF equivalent, key selection criteria include guaranteed no missing codes, 73.5dB SNR at 1kHz, I²C address configurability via AD0/AD1 pins, 14ksps throughput, and operation across 0°C to 70°C ambient.
Technical Context
The LTC2301CDE#PBF implements a capacitive charge-redistribution SAR architecture with internal 2.5V reference and buffered 4.096V REFCOMP output. Its analog input stage features 55pF sampling capacitance and 100Ω series resistance, supporting both differential (IN+/IN−) and polarity-reversing configurations via O/S bit control.
It uses an internal conversion clock and communicates exclusively as an I²C slave device with programmable 7-bit address (via AD0/AD1 pins), supporting standard/fast-mode timing (400kHz SCL max). Sleep mode reduces supply current to 7μA while preserving configuration state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonic transfer function for closed-loop control accuracy. |
| SNR | 73.5dB at 1kHz - enables >11.9 effective bits for high-fidelity sensor signal digitization. |
| Throughput Rate | 14ksps - supports real-time monitoring of fast transients in motor control or power supply feedback loops. |
| Integral Nonlinearity | ±1 LSB max - limits end-point error to ≤0.024% FS, critical for calibration-critical industrial measurement. |
| Supply Current | 300μA at 1ksps, 7μA in sleep - allows multi-year operation on coin-cell batteries in portable data loggers. |
| Input Range | Software-selectable 0–4.096V unipolar or ±2.048V bipolar - simplifies interface to diverse sensors without external level-shifting. |
| I²C Address Pins | AD0 and AD1 support 9 unique addresses plus global sync - enables daisy-chaining up to 9 devices on same bus without address conflict. |
Pinout & Package
Package: 12-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 13 = GND). Requires soldering exposed pad to solid ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 9) | Ground reference | Multiple low-inductance ground connections reduce noise coupling into analog and digital domains. |
| SDA (Pin 2) | I²C bidirectional data line | Open-drain output during read; high-impedance input during write - requires external pull-up to VDD for bus integrity. |
| SCL (Pin 3) | I²C clock input | Slave-only interface - all timing referenced to external master clock; data latched on rising edge, shifted on falling edge. |
| IN+ / IN− (Pins 5, 6) | Differential analog inputs | Simultaneously sampled pair with 70dB CMRR - rejects common-mode noise from long sensor cables or noisy PCB environments. |
| VREF (Pin 7) | 2.5V internal reference output | Bypass with ≥2.2μF ceramic capacitor; can be overdriven by external 2.5V source for improved stability or temperature drift. |
| REFCOMP (Pin 8) | 4.096V reference buffer output | Bypass with 10μF + 0.1μF ceramics; disabled when VREF is grounded - enables use of external precision reference. |
| VDD (Pin 10) | 5V analog supply | 4.75–5.25V range; bypass with 10μF + 0.1μF ceramics - powers analog core and internal reference independently of digital logic. |
| AD0 / AD1 (Pins 12, 11) | I²C address configuration | Three-state (LOW/HIGH/floating) pins set 7-bit slave address - supports up to 9 unique devices per bus without hardware jumpers. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential sample-and-hold | Reduces common-mode noise pickup in noisy industrial environments without external op-amp buffering. |
| Internal 2.5V reference + 4.096V REFCOMP | Eliminates need for external reference IC and associated layout area - reduces BOM count and board space by ~30%. |
| Software-configurable unipolar/bipolar mode | Enables single-part support for both pressure (0–5V) and accelerometer (±2g) signal chains - simplifies inventory management. |
| 1.3μs conversion time with no latency | Allows deterministic timing in real-time control loops - output data available immediately after STOP condition, no pipeline delay. |
| 7μA sleep mode current | Extends battery life in intermittent-sampling applications (e.g., environmental monitors) by >100× versus active operation. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
Use Scenario: Monitoring analog outputs from 4–20mA loop-powered transmitters in PLC I/O modules. IC Role / Device Role / Timing Role: Precision digitization of isolated current-loop signals with 12-bit resolution and low offset drift. Use Value: Enables <0.05% FS total error over 0–70°C without factory calibration, reducing test time and cost. | Use Scenario: Sampling back-EMF or phase current in BLDC motor drives using shunt resistors. IC Role / Device Role / Timing Role: High-speed acquisition of differential current sense signals synchronized to PWM periods. Use Value: 14ksps throughput and 1.3μs conversion allow sampling within dead-time windows, improving torque ripple suppression. |
| Battery-Operated Instrumentation | Power Supply Monitoring |
Use Scenario: Voltage and temperature sensing in handheld multimeters or portable gas detectors. IC Role / Device Role / Timing Role: Low-power analog front-end digitizing multiple sensor types with shared I²C bus. Use Value: 7μA sleep current extends CR2032 battery life to >5 years in wake-on-event designs. | Use Scenario: Real-time monitoring of rail voltages (1.2V, 3.3V, 5V, 12V) and current in telecom power shelves. IC Role / Device Role / Timing Role: Accurate DC measurement of supply margins and load transients for fault logging. Use Value: ±1 LSB INL and 73.5dB SNR ensure detection of <10mV droop on 5V rails under dynamic load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC, SPI interface only, no internal reference, requires external 2.5V ref and VREF decoupling. | Requires additional reference IC and layout area; incompatible I/O protocol prevents drop-in replacement. | Select when SPI bus is already dominant and board space permits external reference components. |
| MCP3221A0T-E/OT | 6-pin SOT-23, I²C interface, internal 2.048V reference, 12-bit, but only unipolar input (0–VREF). | Lacks bipolar mode and REFCOMP buffer; limited to single-ended measurements with reduced full-scale range. | Select for ultra-compact, cost-sensitive unipolar-only applications where ±2.048V range is unnecessary. |
Compared with ADS7822U and MCP3221A0T-E/OT, the LTC2301CDE#PBF uniquely integrates a 4.096V buffered reference, supports both unipolar and bipolar modes via software, and provides superior SNR (73.5dB vs ≤70dB), making it optimal for precision mixed-signal systems where reference stability and dynamic range are critical.
Availability
LTC2301CDE#PBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for LTC2301CDE#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 LTC2301CDE#PBF belongs to ADI's precision SAR ADC product line, designed specifically for space-constrained, low-power applications demanding high DC accuracy and robust noise immunity in harsh environments.
FAQ
What is the operating temperature range for the LTC2301CDE#PBF?
The LTC2301CDE#PBF is rated for 0°C to 70°C ambient operation. This commercial-grade temperature range is validated per the manufacturer's datasheet specifications and applies to the DFN package variant with part marking "2301". Operation outside this range may result in degraded INL, SNR, or reference stability.
Does the LTC2301CDE#PBF require an external reference voltage?
No, the LTC2301CDE#PBF includes an internal 2.5V reference and a buffered 4.096V REFCOMP output. External reference is optional - VREF can be overdriven with a precision 2.5V source, and REFCOMP can be disabled by grounding VREF to accept an external 4.096V reference. The internal references meet all specified accuracy and drift specs across temperature.
How many I²C addresses does the LTC2301CDE#PBF support?
The LTC2301CDE#PBF supports nine unique 7-bit I²C slave addresses via AD0 and AD1 pins configured as LOW, HIGH, or floating. This allows up to nine LTC2301CDE#PBF devices on a single I²C bus without address collision, plus one global address for synchronized conversions across multiple units.
Can the LTC2301CDE#PBF measure bipolar signals?
Yes, the LTC2301CDE#PBF supports software-selectable bipolar input range (±2.048V) via the UNI bit in its 6-bit DIN configuration word. In bipolar mode, the differential input (IN+/IN−) maps −2.048V to 0x000 and +2.048V to 0xFFF, enabling direct digitization of AC-coupled or center-zero sensor outputs without external level-shifting circuitry.
What is the minimum acquisition time required before conversion completes?
The LTC2301CDE#PBF specifies 240ns acquisition time (tACQ) - the duration the analog input must settle before conversion begins. This value is fixed and guaranteed over temperature. For sources with >1kΩ impedance, additional external RC filtering may be needed to ensure full 12-bit settling within this window.
LTC2301CDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 14k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2301CDE#PBF FAQ
1.How can I place an order for LTC2301CDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2301CDE#PBF 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 LTC2301CDE#PBF reliable?
The price and inventory of LTC2301CDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2301CDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC2301CDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2301CDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2301CDE#PBF?
LTC2301CDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2301CDE#PBF 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 LTC2301CDE#PBF?
For technical support, including LTC2301CDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2301CDE#PBF requirements.
6.How does Aetrix verify that LTC2301CDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2301CDE#PBF 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 LTC2301CDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC2301CDE#PBF?
All LTC2301CDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2301CDE#PBF, 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 LTC2301CDE#PBF part is unused and in its original packaging.
Return procedure for LTC2301CDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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