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Analog Devices Inc. LTC2301IMS#PBF
- Part No.:
- LTC2301IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2301IMS#PBF.pdf
- Description:
- IC ADC 12BIT SAR 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:141
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Product details
Overview
LTC2301IMS#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 circuit. 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 - ideal for precision sensor signal acquisition in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2301IMS#PBF datasheet, LTC2301IMS#PBF pinout, LTC2301IMS#PBF application, or LTC2301IMS#PBF equivalent, key selection criteria include guaranteed no missing codes (12-bit resolution), low power consumption (300μA at 1ksps), I²C address configurability via AD0/AD1 pins, and operation across –40°C to +85°C in the 12-lead MSOP package.
Technical Context
The LTC2301IMS#PBF 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 and bipolar configurations via software control of the O/S and UNI bits in the 6-bit DIN word.
Communication occurs over a standard 2-wire I²C bus with nine configurable slave addresses plus one global address for synchronization. The device functions exclusively as an I²C slave, outputs conversion results on SDA with data valid on falling SCL edges, and enters nap mode automatically between conversions to reduce current draw to 7μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonic transfer function and full code coverage for precision measurement. |
| Conversion Time | 1.3μs - enables high-throughput sampling up to 14ksps without external clocking overhead. |
| Supply Current | 300μA at 1ksps, 7μA in nap mode - supports battery-powered and energy-sensitive embedded systems. |
| INL / DNL | ±1 LSB integral nonlinearity, ±1 LSB differential nonlinearity - maintains accuracy across full temperature range (–40°C to +85°C). |
| SNR | 73.5dB at 1kHz - delivers >12-bit effective resolution for low-noise sensor interfacing. |
| I²C Clock Frequency | Up to 400kHz - compatible with standard-mode I²C controllers without requiring high-speed peripherals. |
| Input Range | Software-selectable 0V–4.096V (unipolar) or ±2.048V (bipolar) - simplifies design for both single-ended and differential transducer signals. |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), operating temperature range –40°C to +85°C. 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 independent ground connections required for analog/digital separation and low-noise performance. |
| SDA (Pin 2) | I²C bidirectional data line | Open-drain output during read; high-impedance input during write - requires external pull-up to VDD. |
| SCL (Pin 3) | I²C clock input | Slave-only interface - clock provided externally; data latched on rising edge, output on falling edge. |
| CH0 (Pin 5) | Analog input channel 0 | Differential input pair with CH1; polarity selectable via O/S bit - supports true differential or pseudo-differential acquisition. |
| CH1 (Pin 6) | Analog input channel 1 | Paired with CH0 for differential mode; used as second single-ended input when S/D = 1 in DIN word. |
| VREF (Pin 7) | Internal 2.5V reference output | Bypass with ≥2.2μF ceramic capacitor; may be overdriven by external 2.5V source for improved stability. |
| REFCOMP (Pin 8) | Reference buffer output (4.096V) | Bypass with 10μF + 0.1μF ceramics; enables precise unipolar/bipolar scaling; disabled if VREF grounded. |
| VDD (Pin 10) | 5V analog supply | 4.75V–5.25V range; bypass with 10μF + 0.1μF ceramics - powers analog core and reference circuitry. |
| AD1 / AD0 (Pins 11, 12) | I²C address configuration | Three-state inputs (LOW/HIGH/floating) set 3-bit address - enables up to 9 unique devices on same I²C bus. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.5V reference with ±25ppm/°C tempco | Eliminates external reference IC and associated layout area; supports stable 12-bit accuracy over full temperature range. |
| Fully differential sample-and-hold with 70dB CMRR | Rejects common-mode interference from noisy environments - critical for motor control and industrial sensor front-ends. |
| Software-configurable unipolar/bipolar input range | Single firmware command switches between 0–4.096V and ±2.048V modes - avoids hardware rework for multi-sensor platforms. |
| Nap mode with 7μA quiescent current | Reduces average system power in duty-cycled applications such as portable data loggers and wireless sensors. |
| I²C-compatible interface with 9 address options | Enables scalable multi-ADC architectures without address conflicts - simplifies BOM and firmware for modular designs. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
Use Scenario: Monitoring analog outputs from pressure, temperature, and flow transmitters in PLC I/O modules. IC Role / Device Role / Timing Role: Primary 12-bit A/D converter acquiring conditioned 4–20mA loop signals with galvanically isolated front-end. Use Value: Internal reference and differential input eliminate need for external precision references and instrumentation amplifiers - reducing component count and calibration complexity. |
Use Scenario: Sampling current-sense amplifier outputs for field-oriented control (FOC) in BLDC inverters. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital interface capturing phase currents with synchronized sampling across multiple channels. Use Value: 1.3μs conversion time and 14ksps throughput enable tight current-loop bandwidths while maintaining I²C simplicity for microcontroller integration. |
| Battery-Operated Instrumentation | Power Supply Monitoring |
Use Scenario: Precision voltage and current measurement in handheld multimeters and portable analyzers. IC Role / Device Role / Timing Role: Core ADC converting sensor outputs and supply rails with minimal power budget impact. Use Value: 7μA nap current and 300μA active current allow >1-year battery life in low-duty-cycle logging applications using coin-cell or Li-ion sources. |
Use Scenario: Real-time monitoring of DC-DC converter outputs and rail voltages in telecom and server power systems. IC Role / Device Role / Timing Role: Secondary ADC providing telemetry data to system management controller via I²C. Use Value: I²C compatibility and address configurability allow direct connection to existing PMBus/I²C infrastructure without level-shifting or protocol translation. |
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 reference and separate digital interface lines. | Not drop-in replaceable due to SPI vs I²C, different pinout, and missing internal reference - demands PCB and firmware changes. | Select when SPI is preferred and board space allows external reference; avoid if I²C bus sharing or minimal footprint is required. |
| MCP3221A0T-E/OT | 6-pin SOT-23, 12-bit, I²C, internal reference - but only 1ksps max throughput and no bipolar mode support. | Limited to unipolar 0–Vref inputs; insufficient for accelerometer or current-sense applications requiring ±2.048V range. | Choose for ultra-compact, low-throughput unipolar sensing; reject for bipolar or >1ksps requirements where LTC2301IMS#PBF excels. |
Compared with ADS7822U and MCP3221A0T-E/OT, the LTC2301IMS#PBF uniquely combines I²C compatibility, internal 2.5V reference, bipolar input capability, and 14ksps throughput in a 12-lead MSOP - making it the only option among the three that satisfies simultaneous requirements for precision, flexibility, and interface simplicity in industrial embedded systems.
Availability
LTC2301IMS#PBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to +85°C operation.
Supply support for LTC2301IMS#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision measurement and control.
The LTC2301IMS#PBF belongs to the LTC2301/LTC2305 family of low-power, I²C-compatible 12-bit SAR ADCs designed specifically for space-constrained, low-noise industrial and portable measurement systems requiring integrated reference and flexible input configuration.
FAQ
What is the maximum sampling rate supported by the LTC2301IMS#PBF?
The LTC2301IMS#PBF supports a maximum throughput rate of 14ksps under continuous conversion mode. This is achieved using its internal conversion clock and is specified across the full operating temperature range (–40°C to +85°C). At lower rates like 1ksps, supply current drops to 300μA, enabling optimized power/performance trade-offs in battery-powered applications. The LTC2301IMS#PBF does not require external clocking to reach this speed.
Does the LTC2301IMS#PBF support bipolar input measurements?
Yes, the LTC2301IMS#PBF supports bipolar input measurements of ±2.048V via software configuration using the UNI bit in its 6-bit DIN word. When configured for bipolar mode, the internal 2.5V reference and REFCOMP buffer (4.096V) scale the differential input range accordingly. This capability is confirmed in the datasheet's "Analog Input Multiplexer" section and electrical specifications table, and applies directly to the LTC2301IMS#PBF variant.
How many I²C addresses can be assigned to the LTC2301IMS#PBF?
The LTC2301IMS#PBF supports nine unique I²C slave addresses via the AD0 and AD1 pins, which accept three states each (LOW, HIGH, floating). This yields 3 × 3 = 9 combinations, plus one global address for synchronized wake-up or broadcast commands. All address options are validated in the datasheet's Table 2 and apply identically to the LTC2301IMS#PBF in MSOP packaging.
What is the purpose of the REFCOMP pin on the LTC2301IMS#PBF?
The REFCOMP pin on the LTC2301IMS#PBF provides a buffered 4.096V reference output used to set the full-scale input range for both unipolar (0–4.096V) and bipolar (±2.048V) modes. It must be bypassed with 10μF and 0.1μF ceramic capacitors to GND. Grounding VREF disables the internal buffer, allowing REFCOMP to be overdriven by an external source - a feature confirmed in the "PIN FUNCTIONS" section and applicable to the LTC2301IMS#PBF.
Is the LTC2301IMS#PBF pin-compatible with the LTC2305IMS#PBF?
No, the LTC2301IMS#PBF is not pin-compatible with the LTC2305IMS#PBF. While both share the same 12-lead MSOP package and most pin assignments, the LTC2301IMS#PBF uses Pins 5 and 6 as CH0 and CH1 for differential input selection, whereas the LTC2305IMS#PBF assigns those pins to IN+ and IN– for dedicated differential channel inputs. This functional difference in analog input routing prevents direct substitution without PCB and firmware modifications.
LTC2301IMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2301IMS#PBF FAQ
1.How can I place an order for LTC2301IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2301IMS#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 LTC2301IMS#PBF reliable?
The price and inventory of LTC2301IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2301IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2301IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2301IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2301IMS#PBF?
LTC2301IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2301IMS#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 LTC2301IMS#PBF?
For technical support, including LTC2301IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2301IMS#PBF requirements.
6.How does Aetrix verify that LTC2301IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2301IMS#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 LTC2301IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2301IMS#PBF?
All LTC2301IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2301IMS#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 LTC2301IMS#PBF part is unused and in its original packaging.
Return procedure for LTC2301IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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