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Analog Devices Inc. LTC2306IDD#TRPBF
- Part No.:
- LTC2306IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2306IDD#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,638
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Product details
Overview
LTC2306IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 2-channel, 12-bit successive approximation register (SAR) ADC with SPI/MICROWIRE-compatible serial interface, 500ksps sampling rate, 72.8dB SINAD at 1kHz, and fully differential sample-and-hold circuitry. It operates from a single 5V supply, draws 2.8mA at full speed, and supports software-selectable unipolar (0V to 4.096V) or bipolar (±2.048V) input ranges - ideal for precision industrial sensor interfacing in compact battery-powered systems.
For engineers reviewing the LTC2306IDD#TRPBF datasheet, LTC2306IDD#TRPBF pinout, LTC2306IDD#TRPBF application, or LTC2306IDD#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes performance, channel-to-channel isolation of –109dB, internal conversion clock enabling SCK operation up to 40MHz, separate OVDD output supply (2.7V–5.25V), and –40°C to +85°C industrial temperature grade.
Technical Context
The LTC2306IDD#TRPBF implements a capacitive charge-redistribution SAR architecture with a 2-channel analog multiplexer, enabling on-the-fly reconfiguration between single-ended (CH0/GND or CH1/GND) and differential (CH0–CH1) modes via 6-bit SPI command. Its fully differential sample-and-hold reduces common-mode noise while supporting 25MHz –3dB input linear bandwidth and 700kHz full linear bandwidth (60dB SINAD).
Conversion is initiated by a rising edge on CONVST; acquisition requires ≥240ns, and total conversion time is 1.3–1.6µs. The device uses an external reference (0.1V–VDD) with 55pF input capacitance and supports auto-shutdown scaling supply current from 2.8mA (500ksps) to 14µA (1ksps) and 35µW sleep mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonic transfer function for closed-loop control and metrology. |
| Sampling Rate | 500ksps maximum - supports real-time acquisition of signals up to 250kHz Nyquist bandwidth. |
| SINAD | 72.8dB at fIN = 1kHz - enables >11.8 effective bits for high-fidelity sensor digitization. |
| Input Range | Software-selectable: 0V–4.096V (unipolar) or ±2.048V (bipolar) - matches standard reference voltages without external scaling. |
| Supply Current | 2.8mA at 500ksps; 14µA at 1ksps - enables ultra-low-power operation in duty-cycled data loggers. |
| Channel Isolation | –109dB at 1kHz - prevents crosstalk between CH0 and CH1 during simultaneous sampling of independent sensors. |
| Reference Input | 0.1V to VDD (max 5.25V); 50–260µA current draw - compatible with LT6660/LT1790 precision references. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: SDO | Three-state serial data output | Outputs previous conversion result on falling edge of SCK; enabled only when CONVST is low - enables daisy-chaining and isolated serial bus design. |
| Pin 2: CONVST | Conversion start trigger | Rising-edge sensitive; must return low within 40ns after conversion start/end - defines precise timing window for synchronous sampling. |
| Pin 3: VDD | Analog/digital core supply | 4.75V–5.25V range; bypass with 0.1µF ceramic + 10µF tantalum - critical for maintaining 72.8dB SINAD under dynamic load. |
| Pin 4: CH0 | Channel 0 analog input | Configurable as single-ended (vs GND) or differential (vs CH1); 55pF input capacitance - dictates RC filter design for settling within 240ns acquisition time. |
| Pin 5: CH1 | Channel 1 analog input | Paired with CH0 for differential mode; matched unipolar/bipolar full-scale error (±0.3LSB max) - ensures accurate ratiometric measurements. |
| Pin 6: VREF | External reference input | Accepts 0.1V–VDD; requires 10µF + 0.1µF decoupling - sets LSB size (1mV for 4.096V ref) and directly impacts offset/FS error drift. |
| Pin 7: GND | Analog/digital ground | Common return for all supplies and analog inputs - must connect to solid ground plane to minimize noise coupling into 72.8dB SINAD path. |
| Pin 8: SDI | Serial data input | Latches 6-bit configuration word (S/D, O/S, UNI bits) on first 6 SCK rising edges - selects input mode, polarity, and range before next conversion. |
| Pin 9: SCK | Serial clock input | Supports up to 40MHz; controls timing of SDI latching and SDO shifting - allows high-speed data transfer without requiring external clock generation. |
| Pin 10: OVDD | Digital output driver supply | 2.7V–5.25V independent of VDD - enables level-shifting to 3.3V or 5V logic families without level translators. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown current scaling | Reduces IDD from 2.8mA (500ksps) to 14µA (1ksps), cutting power by >99% during idle intervals - extends battery life in portable instrumentation. |
| Software-selectable input range | Single command bit (UNI) switches between 0V–4.096V unipolar and ±2.048V bipolar - eliminates need for external gain/level-shift circuitry in multi-sensor systems. |
| Internal conversion clock | Removes dependency on external clock source; allows SCK to run at any frequency ≤40MHz - simplifies timing design in isolated or noise-sensitive environments. |
| Separate OVDD supply | Decouples digital I/O voltage from analog VDD - prevents digital switching noise from modulating analog supply and degrading 72.8dB SINAD. |
| Channel-to-channel isolation | –109dB at 1kHz - enables simultaneous sampling of high-gain and low-gain sensor channels (e.g., accelerometer + thermocouple) without crosstalk-induced measurement error. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: Dual-channel front-end ADC acquiring synchronized analog sensor outputs at 500ksps with 12-bit resolution and no missing codes. Use Value: Eliminates external multiplexers and op-amp buffers; 3mm×3mm DFN package fits dense I/O modules; –40°C to +85°C rating ensures reliability in factory environments. |
Use Scenario: Closed-loop field-oriented control (FOC) of BLDC motors using dual shunt current sensing and back-EMF voltage measurement. IC Role / Device Role / Timing Role: Simultaneous sampling of two phase currents (CH0/CH1) in differential mode with 240ns acquisition time and 1.6µs conversion latency. Use Value: Channel-to-channel isolation (–109dB) prevents current-sense crosstalk; bipolar input range supports bidirectional current detection without polarity-reversal circuitry. |
| Battery-Powered Data Logger | Isolated Remote Sensor Node |
|
Use Scenario: Multi-year deployment of environmental sensors (humidity, CO₂, light) powered by coin-cell batteries in remote locations. IC Role / Device Role / Timing Role: Low-power ADC performing burst-mode acquisition at 1ksps, then entering 35µW sleep mode between samples. Use Value: Auto-shutdown cuts average current to µA range; 2.8mA active current enables fast wake-up; small DFN footprint minimizes PCB area and leakage paths. |
Use Scenario: High-voltage grid monitoring where analog inputs are galvanically isolated from MCU side using digital isolators. IC Role / Device Role / Timing Role: SPI-compatible ADC interfaced across ADuM3150 isolator, using separate OVDD (3.3V) and VDD (5V) to match isolated domain logic levels. Use Value: 40MHz SCK tolerance allows robust timing margin across isolator propagation delay; three-state SDO prevents bus contention during isolation reset sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 1MSPS, 16-channel, SPI interface; requires external reference; 2.7V–5.25V supply; no auto-shutdown. | Higher channel count but larger 32-pin QFN package; lacks integrated sample-and-hold and differential input capability. | Select for high-channel-count industrial I/O modules where multiplexing >2 signals per ADC is required; avoid when differential sensing or ultra-low sleep current is critical. |
| MAX11106ETE+ | 12-bit, 500ksps, 2-channel, SPI interface; internal reference (4.096V); 2.7V–3.6V supply; 1.5µA shutdown current. | Integrated reference simplifies BOM but limits input range flexibility; lower supply voltage restricts use with 5V sensors without level shifters. | Select for 3.3V-only systems needing reference integration; avoid when bipolar input support, 5V sensor compatibility, or –40°C to +85°C operation is required. |
Compared with ADS7953IRHBT and MAX11106ETE+, the LTC2306IDD#TRPBF uniquely combines true differential 2-channel operation, software-selectable unipolar/bipolar ranges, –40°C to +85°C rating, and 14µA auto-shutdown - making it optimal for precision, low-power, dual-sensor applications where signal integrity and thermal robustness are prioritized over channel count or reference integration.
Availability
LTC2306IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and battery-operated data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2306IDD#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. (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 LTC2306IDD#TRPBF belongs to Linear's precision SAR ADC product line, designed specifically for high-resolution, low-noise data acquisition in space-constrained industrial, medical, and test equipment where accuracy, power efficiency, and temperature stability are critical.
FAQ
What is the operating temperature range of the LTC2306IDD#TRPBF?
The LTC2306IDD#TRPBF is rated for –40°C to +85°C, as indicated by the "I" grade in the part number. This industrial temperature range ensures reliable operation in demanding environments such as factory automation controllers, outdoor sensor nodes, and motor drive enclosures where ambient temperatures exceed commercial-grade limits.
Does the LTC2306IDD#TRPBF require an external reference voltage?
Yes, the LTC2306IDD#TRPBF requires an external reference connected to the VREF pin. It accepts 0.1V to VDD (up to 5.25V), with typical use cases employing 4.096V references like the LT6660 or LT1790A-4.096. The device draws 50–260µA from VREF depending on sampling rate, and proper decoupling (10µF + 0.1µF) is mandatory for achieving 72.8dB SINAD performance.
How does the LTC2306IDD#TRPBF handle channel selection and input configuration?
The LTC2306IDD#TRPBF uses a 6-bit SPI command sent via SDI to configure channel mode: the S/D bit selects single-ended (CH0/GND or CH1/GND) or differential (CH0–CH1), the O/S bit selects polarity, and the UNI bit selects unipolar or bipolar range. Configuration occurs before each conversion, enabling dynamic reconfiguration "on the fly" without interrupting acquisition flow.
Can the LTC2306IDD#TRPBF operate with different supply voltages for analog and digital I/O?
Yes, the LTC2306IDD#TRPBF features separate VDD (4.75V–5.25V for analog/digital core) and OVDD (2.7V–5.25V for digital outputs) supplies. This allows interfacing with 3.3V microcontrollers or FPGAs while maintaining optimal analog performance at 5V - eliminating level shifters and reducing noise coupling between domains.
What is the minimum acquisition time required for full 12-bit accuracy with the LTC2306IDD#TRPBF?
The LTC2306IDD#TRPBF specifies a minimum acquisition time (tACQ) of 240ns - the interval from the 7th SCK rising edge to the next CONVST rising edge. This time allows the internal sample-and-hold capacitors to settle to 12-bit accuracy. External RC filters must be designed so that their time constant permits full settling within this window when driving high-impedance sources.
LTC2306IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2306IDD#TRPBF FAQ
1.How can I place an order for LTC2306IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2306IDD#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 LTC2306IDD#TRPBF reliable?
The price and inventory of LTC2306IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2306IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2306IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2306IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2306IDD#TRPBF?
LTC2306IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2306IDD#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 LTC2306IDD#TRPBF?
For technical support, including LTC2306IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2306IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2306IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2306IDD#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 LTC2306IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2306IDD#TRPBF?
All LTC2306IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2306IDD#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 LTC2306IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2306IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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