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Analog Devices Inc. LTC2301IMS#TRPBF
- Part No.:
- LTC2301IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2301IMS#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:926
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Product details
Overview
LTC2301IMS#TRPBF 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 circuit. It operates from a single 5V supply, achieves 1.3μs conversion time, and delivers 73.5dB SNR at 1kHz - ideal for precision battery-powered sensor monitoring and industrial process control.
For engineers reviewing the LTC2301IMS#TRPBF datasheet, LTC2301IMS#TRPBF pinout, LTC2301IMS#TRPBF application, or LTC2301IMS#TRPBF equivalent, key selection considerations include its MSOP-12 package, –40°C to +85°C operating range, software-selectable unipolar/bipolar input ranges, 14ksps throughput, and low 300μA active current at 1ksps.
Technical Context
The LTC2301IMS#TRPBF implements a capacitive charge-redistribution SAR architecture with internal clocking, eliminating external timing components. Its analog input stage features a fully differential sample-and-hold that rejects common-mode noise and supports both unipolar (0V to 4.096V) and bipolar (±2.048V) input configurations via software control.
I²C communication uses standard-mode timing (400kHz max), with open-drain SDA requiring pull-up and SCL as slave-only clock input. The device supports nine I²C addresses via AD0/AD1 three-state pins and includes a global synchronization address. Conversion results are output LSB-first with four trailing zeros, latched on SCL rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonicity and full-scale linearity in closed-loop control feedback paths. |
| Conversion Time | 1.3μs - enables rapid sampling of transient events without external timing circuitry. |
| SNR | 73.5dB at 1kHz - supports >11.5 effective bits for high-fidelity sensor digitization. |
| Integral Nonlinearity | ±1 LSB max - maintains accuracy across full scale for calibration-critical applications like power supply monitoring. |
| Supply Current | 300μA at 1ksps; 225μA nap mode; 7μA sleep mode - extends battery life in portable instrumentation. |
| Input Range | Software-selectable 0V–4.096V (unipolar) or ±2.048V (bipolar) - simplifies signal conditioning for diverse transducer outputs. |
| I²C Address Options | 9 unique addresses via AD0/AD1 (LOW/HIGH/FLOAT) plus one global sync address - enables multi-device bus management without address conflict. |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), –40°C to +85°C operating range, exposed pad not present (DFN variant has exposed GND pad; MSOP does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 9) | Ground reference | Three dedicated ground pins require low-impedance connection to solid ground plane for noise immunity and thermal stability. |
| SDA (Pin 2) | I²C bidirectional data line | Open-drain output during read (requires VDD pull-up); high-impedance input during write - enables shared-bus operation. |
| SCL (Pin 3) | I²C clock input | Slave-only clock input; data shifted on rising edge (input) and falling edge (output) - enforces strict I²C timing compliance. |
| CH0 (Pin 5) | Differential analog input positive | Primary analog input channel; polarity selectable via O/S bit - supports both single-ended and differential configurations relative to CH1 or GND. |
| CH1 (Pin 6) | Differential analog input negative | Secondary input used as reference for CH0 in differential mode; also configurable as independent input in single-ended mode. |
| VREF (Pin 7) | 2.5V internal reference output | Bypass with ≥2.2μF ceramic capacitor; may be overdriven by external 2.5V source to improve accuracy or drift performance. |
| REFCOMP (Pin 8) | 4.096V reference buffer output | Bypass with 10μF + 0.1μF ceramics; disabled when VREF grounded - allows external reference injection for enhanced stability. |
| VDD (Pin 10) | 5V analog supply | 4.75V–5.25V range; bypass with 10μF + 0.1μF ceramics - powers analog core and reference, critical for SNR integrity. |
| AD1 (Pin 11) | I²C address bit A1 | Three-state (LOW/HIGH/FLOAT) selects MSB of 3-bit address - enables up to 9 unique device addresses on same bus. |
| AD0 (Pin 12) | I²C address bit A0 | Three-state (LOW/HIGH/FLOAT) selects LSB of 3-bit address - works with AD1 to configure full I²C address map. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential sample-and-hold | Rejects common-mode noise from sensors or long traces - improves measurement fidelity in electrically noisy industrial environments. |
| Internal 2.5V reference with 4.096V buffered output | Eliminates external reference IC and associated layout area - reduces BOM count and PCB footprint in space-constrained designs. |
| Software-configurable unipolar/bipolar input range | Single register write switches between 0–4.096V and ±2.048V full-scale - avoids hardware rework when adapting to different sensor types. |
| Nap and sleep power modes | Reduces current to 225μA (nap) or 7μA (sleep) - enables microcontroller-gated sampling for ultra-low-power wake-on-event systems. |
| 14ksps maximum throughput | Supports real-time monitoring of mechanical vibration, motor current, or thermal transients without external oversampling or decimation. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensor outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 12-bit digitizer for 4–20mA loop receivers and RTD/thermocouple signal chains. Use Value: ±1 LSB INL and 73.5dB SNR ensure <0.025% full-scale error across 0–100°C ambient range, meeting SIL-2 functional safety requirements. |
Use Scenario: Sampling phase currents and DC bus voltage in BLDC motor drives. IC Role / Device Role / Timing Role: High-speed analog front-end for current-sense amplifiers and voltage dividers feeding MCU ADC triggers. Use Value: 1.3μs conversion time enables sub-microsecond current sampling per PWM cycle, improving field-oriented control accuracy. |
| Battery-Operated Instrumentation | Isolated Data Acquisition |
Use Scenario: Portable multimeters, handheld gas analyzers, and environmental monitors powered by coin cells or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power analog-to-digital converter interfacing directly to transducer bridges and amplifiers. Use Value: 7μA sleep current extends 200mAh battery life to >10 years in wake-on-interrupt mode, while I²C interface minimizes GPIO usage. |
Use Scenario: Remote sensor nodes in distributed control systems using digital isolators (e.g., ADuM1250) between MCU and ADC. IC Role / Device Role / Timing Role: Isolated-side ADC communicating via I²C across reinforced insulation barrier. Use Value: No external clock or reference required simplifies isolated domain design; 9 I²C addresses prevent bus contention across multiple isolated channels. |
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 REF decoupling. | Requires additional reference IC and level-shifting for 5V systems; lacks I²C compatibility and bipolar mode. | Select when SPI-native microcontrollers dominate the platform and board space permits external reference components. |
| MCP3221A0T-E/OT | 6-pin SOT-23, 12-bit, I²C, internal reference, but only unipolar 0–VDD range (no bipolar support), 3.6V max VDD. | Cannot measure negative signals; incompatible with 5V systems; lower SNR (70dB) limits dynamic range. | Select for cost-sensitive, single-supply 3.3V embedded systems where bipolar inputs are unnecessary. |
Compared with ADS7822U and MCP3221A0T-E/OT, the LTC2301IMS#TRPBF uniquely combines I²C compatibility, integrated 2.5V/4.096V references, software-selectable bipolar operation, and –40°C to +85°C rating - making it the only option supporting precision isolated or battery-powered 5V systems without external reference or level-shifting.
Availability
LTC2301IMS#TRPBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2301IMS#TRPBF 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 LTC2301IMS#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition family, designed specifically for low-power, high-accuracy sensor interfacing in space- and energy-constrained systems where I²C simplicity and integrated references reduce system complexity.
FAQ
What is the operating temperature range for the LTC2301IMS#TRPBF?
The LTC2301IMS#TRPBF is rated for –40°C to +85°C operation, as confirmed by its "I" grade designation and MSOP packaging. This range is validated across all electrical specifications including INL (±1 LSB), SNR (73.5dB min), and supply current (300μA at 1ksps), making it suitable for industrial and automotive under-hood environments where thermal stability is critical.
Does the LTC2301IMS#TRPBF support differential input measurements?
Yes, the LTC2301IMS#TRPBF supports true differential input measurements via its CH0 (IN+) and CH1 (IN–) pins. The O/S bit in the 6-bit DIN word configures polarity reversal - setting O/S = 0 samples CH0–CH1, while O/S = 1 samples CH1–CH0. This fully differential architecture provides inherent common-mode noise rejection essential for precision transducer interfaces.
Can the LTC2301IMS#TRPBF operate with an external reference instead of the internal one?
Yes, the LTC2301IMS#TRPBF supports external reference injection. Driving VREF with a precision 2.5V source overrides the internal reference, while driving REFCOMP with a stable 4.096V source (with VREF grounded) disables the internal buffer and enables external reference use. Both methods preserve full 12-bit performance and are documented in the Applications Information section.
How many I²C addresses does the LTC2301IMS#TRPBF support?
The LTC2301IMS#TRPBF supports nine unique I²C addresses via three-state configuration of AD0 and AD1 pins (LOW/HIGH/FLOAT), plus one global address for synchronized conversions across multiple devices. This enables up to ten LTC2301IMS#TRPBF units on a single I²C bus without address conflict - critical for multi-channel data loggers and modular sensor systems.
What is the minimum acquisition time required for full 12-bit accuracy with the LTC2301IMS#TRPBF?
The LTC2301IMS#TRPBF specifies tACQ = 240ns as the minimum acquisition time for full 12-bit accuracy. This value assumes optimal source impedance (<100Ω) and proper REFCOMP/VREF bypassing. For higher-impedance sources, additional settling time must be allowed - the internal sample-and-hold capacitor (55pF) and series resistance form an RC network whose time constant must settle within 240ns to achieve ±0.5 LSB error.
LTC2301IMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2301IMS#TRPBF FAQ
1.How can I place an order for LTC2301IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2301IMS#TRPBF 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 LTC2301IMS#TRPBF reliable?
The price and inventory of LTC2301IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2301IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2301IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2301IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2301IMS#TRPBF?
LTC2301IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2301IMS#TRPBF 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 LTC2301IMS#TRPBF?
For technical support, including LTC2301IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2301IMS#TRPBF requirements.
6.How does Aetrix verify that LTC2301IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2301IMS#TRPBF 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 LTC2301IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2301IMS#TRPBF?
All LTC2301IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2301IMS#TRPBF, 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 LTC2301IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2301IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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