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Analog Devices Inc. LTC2301CMS#PBF
- Part No.:
- LTC2301CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2301CMS#PBF.pdf
- Description:
- IC ADC 12BIT SAR 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
LTC2301CMS#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 interfacing in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2301CMS#PBF datasheet, LTC2301CMS#PBF pinout, LTC2301CMS#PBF application, or LTC2301CMS#PBF equivalent, key selection considerations include its 14ksps throughput rate, 73.5dB SNR, guaranteed no missing codes, MSOP-12 package compatibility, and I²C address configurability via AD0/AD1 pins.
Technical Context
The LTC2301CMS#PBF implements a capacitive charge-redistribution SAR architecture with internal clocking, eliminating external timing components. Its analog front-end includes a fully differential sample-and-hold that rejects common-mode noise and supports both unipolar and bipolar modes via software configuration of the O/S and UNI bits in the 6-bit DIN word.
Communication occurs over a standard 2-wire I²C bus with nine selectable slave addresses plus one global address for synchronization. The device functions exclusively as an I²C slave, outputs conversion results on falling SCL edges, and requires external pull-up resistors on SDA due to its open-drain output configuration.
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. |
| Throughput Rate | 14ksps-supports real-time sampling of motor current or temperature signals without undersampling. |
| SNR | 73.5dB at 1kHz-enables >11.9 effective bits for high-fidelity sensor digitization. |
| Integral Nonlinearity | ±1 LSB max-limits end-point error to <0.024% of full scale for calibrated measurement systems. |
| Supply Current | 300μA at 1ksps; 7μA in sleep mode-extends battery life in portable instrumentation. |
| Input Range | Software-selectable 0–4.096V (unipolar) or ±2.048V (bipolar)-matches common transducer output spans without external level-shifting. |
| I²C Clock Frequency | Up to 400kHz-compatible with standard-mode I²C controllers without custom timing logic. |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), operating temperature range 0°C to 70°C. Exposed pad not present (DFN-only packages include exposed GND pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 9) | Ground reference | All three GND pins must connect to solid ground plane to minimize noise coupling into analog and digital sections. |
| SDA (Pin 2) | I²C bidirectional data line | Open-drain output during read; high-impedance input during write-requires external pull-up to VDD for proper bus operation. |
| SCL (Pin 3) | I²C clock input | Accepts external clock only; data latched on rising edge, shifted out on falling edge-no master functionality. |
| CH0 (Pin 5) | Differential input positive | Configurable as IN+ or IN− via O/S bit; paired with CH1 for differential acquisition or used alone for single-ended relative to GND. |
| CH1 (Pin 6) | Differential input negative | Complements CH0 in differential mode; unused in single-ended configurations-must be tied appropriately per MUX setting. |
| VREF (Pin 7) | 2.5V internal reference output | Bypass with ≥2.2μF ceramic capacitor; can be overdriven by external 2.5V source to improve stability or accuracy. |
| REFCOMP (Pin 8) | 4.096V buffered reference output | Bypass with 10μF + 0.1μF ceramics; disabled when VREF is grounded-enables external reference substitution. |
| VDD (Pin 10) | 5V analog supply | 4.75V–5.25V range; bypass with 10μF + 0.1μF ceramics-powers analog core and reference circuits. |
| AD1 (Pin 11) | I²C address bit A1 | Three-state (LOW/HIGH/floating) control-sets MSB of 7-bit I²C address per Table 2 in datasheet. |
| AD0 (Pin 12) | I²C address bit A0 | Three-state (LOW/HIGH/floating) control-sets LSB of 7-bit I²C address; enables up to 9 unique devices on same bus. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.5V reference with ±25ppm/°C tempco | Eliminates external reference IC and reduces BOM count while maintaining <±1 LSB drift over 0°C–70°C. |
| Fully differential sample-and-hold | Rejects common-mode noise from motors or switching supplies-critical for accelerometer or current-sense applications. |
| Software-configurable unipolar/bipolar mode | Enables single hardware design to support both 0–5V sensors and ±2.5V bridge transducers without PCB changes. |
| 1.3μs conversion time with internal clock | Removes need for external timing circuitry-simplifies layout and improves system-level timing predictability. |
| Low 300μA active current at 1ksps | Reduces thermal load in sealed enclosures and extends runtime in coin-cell-powered diagnostic tools. |
Applications
| Industrial Process Control | Motor Control Feedback |
|---|---|
Use Scenario: Monitoring 4–20mA loop outputs from pressure/flow transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Precision 12-bit digitizer converting conditioned transducer voltage to I²C-readable digital values at ≤14ksps. Use Value: Internal reference and differential input eliminate need for external op-amp buffers and reference ICs-reducing component count by ≥3 per channel. | Use Scenario: Sampling phase currents in BLDC motor drives using shunt resistors with isolated amplifiers. IC Role / Device Role / Timing Role: Bipolar-mode ADC capturing ±2.048V amplifier outputs synchronized to PWM periods via I²C polling. Use Value: 73.5dB SNR ensures accurate current reconstruction for field-oriented control algorithms with <0.5% torque ripple. |
| Battery-Operated Instrumentation | Power Supply Monitoring |
Use Scenario: Portable multimeter measuring DC voltage, resistance, and diode drop with auto-ranging front-end. IC Role / Device Role / Timing Role: Low-power ADC acquiring sensor outputs during brief wake cycles triggered by button press or timer interrupt. Use Value: 7μA sleep current extends CR2032 battery life to >2 years in typical usage-enabling maintenance-free handheld designs. | Use Scenario: Real-time monitoring of 12V/5V/3.3V rails in telecom power shelves with fault logging via I²C. IC Role / Device Role / Timing Role: Unipolar ADC digitizing resistor-divider outputs for rail voltage validation at 1ksps. Use Value: Guaranteed no missing codes prevents erroneous undervoltage lockout events-improving system reliability during brownout 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 level-shifting for 5V systems. | Not pin-compatible; SPI bus occupies more MCU GPIOs than I²C; lacks bipolar mode and sleep mode. | Select when SPI is preferred and board space allows external reference + level shifters. |
| MCP3221A0T-E/OT | 6-pin SOT-23, 12-bit, I²C, internal 2.048V ref-lower reference voltage limits unipolar range to 0–2.048V. | Smaller footprint but lower full-scale range reduces dynamic range for 4–20mA loop receivers requiring >3V span. | Select for ultra-compact designs where 2.048V FS is sufficient and temperature drift <±50ppm/°C is acceptable. |
Compared with ADS7822U and MCP3221A0T-E/OT, the LTC2301CMS#PBF provides superior flexibility through its software-selectable bipolar/unipolar input, integrated 4.096V buffered reference (REFCOMP), and configurable I²C addressing-making it optimal for multi-sensor systems requiring mixed signal polarities and minimal external components.
Availability
LTC2301CMS#PBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated instrumentation requiring stable component supply across extended production lifecycles.
Supply support for LTC2301CMS#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 LTC2301CMS#PBF belongs to ADI's precision data acquisition product line, designed specifically for low-power, space-constrained systems needing high-accuracy analog-to-digital conversion with minimal external components and robust I²C integration.
FAQ
What is the maximum sampling rate of the LTC2301CMS#PBF?
The LTC2301CMS#PBF achieves a maximum throughput rate of 14ksps under standard operating conditions (VDD = 5V, TA = 25°C). This rate is sustained across its full 0°C to 70°C operating temperature range and enables real-time capture of signals up to ~7kHz without aliasing. Conversion time remains fixed at 1.3μs regardless of throughput setting due to its internal clock architecture.
Does the LTC2301CMS#PBF require an external reference voltage?
No, the LTC2301CMS#PBF does not require an external reference voltage-it integrates a precision 2.5V reference (VREF) and a buffered 4.096V reference (REFCOMP) on-chip. These references are factory-trimmed and specified over temperature. However, both pins support overdriving with external references if higher accuracy or different voltage levels are needed for specific applications.
How is the I²C address configured on the LTC2301CMS#PBF?
The LTC2301CMS#PBF uses two hardware address pins-AD0 (Pin 12) and AD1 (Pin 11)-each configurable as LOW, HIGH, or floating to select one of nine possible 7-bit I²C slave addresses. Address mapping follows Table 2 in the datasheet; for example, AD1=HIGH and AD0=LOW yields address 0x92. No software address programming is required-the configuration is static at power-up.
Can the LTC2301CMS#PBF operate in bipolar input mode?
Yes, the LTC2301CMS#PBF supports bipolar input mode (±2.048V) via software configuration using the UNI bit in its 6-bit DIN word. When UNI = 0, the device interprets inputs differentially across CH0 and CH1 as bipolar, enabling direct connection to bridge sensors or op-amp outputs centered at midscale. This mode is guaranteed over the full 0°C to 70°C temperature range.
What is the power consumption of the LTC2301CMS#PBF in sleep mode?
In sleep mode (SLP bit = 1), the LTC2301CMS#PBF draws just 7μA typical supply current at 25°C, dropping to ≤15μA across its full 0°C to 70°C operating range. This ultra-low quiescent current significantly extends battery life in portable equipment. Wakeup from sleep mode is automatic upon I²C address recognition, with REFCOMP settling within 200ms to 0.5 LSB accuracy.
LTC2301CMS#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2301CMS#PBF FAQ
1.How can I place an order for LTC2301CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2301CMS#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 LTC2301CMS#PBF reliable?
The price and inventory of LTC2301CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2301CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2301CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2301CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2301CMS#PBF?
LTC2301CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2301CMS#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 LTC2301CMS#PBF?
For technical support, including LTC2301CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2301CMS#PBF requirements.
6.How does Aetrix verify that LTC2301CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2301CMS#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 LTC2301CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2301CMS#PBF?
All LTC2301CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2301CMS#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 LTC2301CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2301CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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