My Inquiry
My Account
Analog Devices Inc. LTC2302IDD#TRPBF
- Part No.:
- LTC2302IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2302IDD#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,274
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2302IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 1-channel, 12-bit successive approximation register (SAR) ADC with differential analog inputs (IN+, IN–), SPI/MICROWIRE-compatible serial interface, and internal conversion clock. It delivers 500ksps sampling rate, 72.8dB SINAD at 1kHz input, and operates from a single 5V supply drawing 2.8mA - ideal for precision battery-powered data acquisition in industrial sensor interfaces.
For engineers reviewing the LTC2302IDD#TRPBF datasheet, LTC2302IDD#TRPBF pinout, LTC2302IDD#TRPBF application, or LTC2302IDD#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes performance, software-selectable unipolar/bipolar input range (±2.048V or 0–4.096V), auto-shutdown current scaling (14µA at 1ksps), and 10-pin 3mm × 3mm DFN package with exposed pad ground.
Technical Context
The LTC2302IDD#TRPBF implements a fully differential sample-and-hold circuit to suppress common-mode noise, paired with a 12-bit capacitive charge-redistribution DAC and SAR logic that sequences from MSB to LSB. Its analog input structure features 55pF input capacitance in sample mode and ±1µA leakage current over temperature.
Conversion is initiated by a rising edge on CONVST; the 6-bit SDI command configures polarity and input mode before acquisition begins. The internal conversion clock decouples SCK frequency (up to 40MHz) from sampling timing, enabling flexible host interface design without external clock synchronization.
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. |
| Sampling Rate | 500ksps maximum - supports real-time monitoring of fast transients in motor current or vibration sensing. |
| SINAD | 72.8dB at fIN = 1kHz - enables >11.8 effective bits for high-fidelity signal reconstruction. |
| Supply Current | 2.8mA at 500ksps; 14µA at 1ksps - auto-shutdown scales power with throughput, critical for energy-constrained IoT nodes. |
| Analog Input Range | Software-selectable: 0V to 4.096V (unipolar) or ±2.048V (bipolar) - matches standard reference voltages without external scaling. |
| Reference Input Range | 0.1V to VDD (5V) - allows use of low-noise references like LT6660-4.096 or LT1790A-4.096 for optimal SNR. |
| Digital Interface | SPI/MICROWIRE-compatible 4-wire serial port (SDI/SDO/SCK/CONVST) - simplifies isolation and reduces PCB routing complexity. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11), rated for –40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: SDO | Three-state serial data output | Drives previous conversion result on falling edge of SCK; enabled only when CONVST is low - prevents bus contention in multi-device systems. |
| Pin 2: CONVST | Conversion start trigger | Rising-edge sensitive; must return low within 40ns after conversion start/end - defines precise sampling instant for time-critical measurements. |
| Pin 3: VDD | Analog/digital core supply | 4.75V to 5.25V operation; requires 0.1µF ceramic + 10µF tantalum bypassing - maintains stable reference and logic thresholds. |
| Pin 4: IN+ | Differential analog input positive | Paired with IN– (Pin 5); accepts ±2.048V bipolar or 0–4.096V unipolar full-scale - rejects common-mode noise up to 70dB. |
| Pin 5: IN– | Differential analog input negative | Fixed reference node for differential measurement; tied internally to sample-and-hold - enables true differential acquisition without external op-amp. |
| Pin 6: VREF | External reference input | 0.1V to 5V range; draws 230µA max at 500ksps - requires 10µF tantalum + 0.1µF ceramic decoupling for low-noise operation. |
| Pin 7: GND | Analog/digital ground | Common return for all supplies and analog signals; exposed pad (Pin 11) must be soldered to PCB ground plane - minimizes thermal resistance and EMI coupling. |
| Pin 8: SDI | Serial data input | Latches 6-bit configuration word (O/S, UNI bits) on first 6 SCK rising edges - selects input polarity and unipolar/bipolar mode before next conversion. |
| Pin 9: SCK | Serial clock input | Supports up to 40MHz frequency; timing independent of sampling rate - allows high-speed data readout without constraining system clock architecture. |
| Pin 10: OVDD | Digital output driver supply | 2.7V to 5.25V; isolates output logic levels from core VDD - enables interfacing with 3.3V or 5V microcontrollers without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential sample-and-hold | Reduces common-mode noise by ≥70dB, enabling accurate measurements in electrically noisy industrial environments. |
| Auto-shutdown current scaling | Supply current drops from 2.8mA (500ksps) to 14µA (1ksps) - extends battery life in portable instrumentation without firmware intervention. |
| Software-selectable input range | Single command bit toggles between ±2.048V bipolar and 0–4.096V unipolar modes - eliminates need for external gain/level-shifting circuitry. |
| Internal conversion clock | Decouples SCK frequency from sampling timing - permits use of low-jitter master clocks while maintaining precise 2µs minimum cycle time. |
| Guaranteed no missing codes | Ensures monotonicity across full 12-bit transfer curve - essential for position feedback in servo motor control applications. |
Applications
| Industrial Process Monitoring | Motor Phase Current Sensing |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC analog I/O modules in factory automation systems. IC Role / Device Role / Timing Role: Primary 12-bit ADC digitizing conditioned sensor outputs with 500ksps throughput and ±2.048V bipolar range. Use Value: 72.8dB SINAD ensures <12-bit ENOB for detecting subtle process drifts; auto-shutdown reduces average power during idle cycles. |
Use Scenario: Real-time sampling of shunt-based phase currents in three-phase inverter drives. IC Role / Device Role / Timing Role: Differential-input ADC capturing synchronized current waveforms with 1.3µs conversion time and 240ns acquisition window. Use Value: Fully differential architecture rejects PWM switching noise; no-missing-codes guarantee prevents torque ripple from quantization nonlinearity. |
| Battery-Powered Sensor Nodes | Isolated Data Acquisition |
|
Use Scenario: Compact environmental sensor units measuring temperature, pressure, and humidity in remote field deployments. IC Role / Device Role / Timing Role: Low-power ADC converting analog sensor outputs using 0–4.096V unipolar range and 1ksps auto-shutdown mode. Use Value: 14µA sleep current extends 2xAA battery life to >5 years; 3mm × 3mm DFN footprint minimizes PCB area in space-constrained enclosures. |
Use Scenario: High-voltage grid monitoring where analog front-end is galvanically isolated from digital processing side. IC Role / Device Role / Timing Role: SPI-compatible ADC interfaced via digital isolators (e.g., ADuM1401), leveraging 4-wire protocol for robust noise immunity. Use Value: Independent OVDD pin allows 3.3V logic-level communication across isolation barrier; 40MHz SCK supports fast data streaming without timing bottlenecks. |
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 |
|---|---|---|---|
| ADS7822U | 8-pin SOIC package; 200ksps max sampling rate; no auto-shutdown; requires external reference. | Lower throughput and fixed 5V-only interface limit use in high-speed or battery-operated designs. | Choose for cost-sensitive, non-portable applications where 200ksps suffices and board space is not constrained. |
| MAX11100ETE+ | 10-pin TDFN package; 1Msps sampling rate; integrated reference; SPI-compatible but no polarity selection bit. | Higher speed and internal reference simplify BOM, but lacks software-configurable bipolar/unipolar mode. | Prefer when maximum throughput or reference integration outweighs need for flexible input range configuration. |
Compared with ADS7822U and MAX11100ETE+, the LTC2302IDD#TRPBF uniquely balances 500ksps speed, ultra-low shutdown current, and runtime-configurable input polarity - making it optimal for portable, noise-immune, and thermally constrained measurement systems.
Availability
LTC2302IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process monitoring, motor phase current sensing, and battery-powered sensor nodes requiring stable component supply with extended lifecycle support.
Supply support for LTC2302IDD#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 acquired Linear Technology in 2017 and maintains its precision analog IC portfolio, emphasizing high-performance data converters, power management, and signal conditioning solutions for demanding industrial and instrumentation markets.
The LTC2302IDD#TRPBF belongs to Linear's legacy SAR ADC family designed specifically for high-accuracy, low-power, and noise-immune data acquisition in portable and harsh-environment applications - prioritizing DC precision, dynamic range, and ease of system integration.
FAQ
What is the operating temperature range of the LTC2302IDD#TRPBF?
The LTC2302IDD#TRPBF is specified for –40°C to +85°C operation, matching the "I" grade designation in its part number. This extended industrial temperature range ensures reliable performance in outdoor sensor housings, motor drive cabinets, and factory-floor PLC modules where ambient temperatures exceed commercial limits. Thermal derating is not required up to 85°C ambient under typical PCB layout conditions with exposed pad soldered to ground plane.
Does the LTC2302IDD#TRPBF require an external reference voltage?
Yes, the LTC2302IDD#TRPBF requires an external reference connected to the VREF pin. It supports reference voltages from 0.1V to 5V, with optimal performance achieved using low-noise references such as the LT6660-4.096 or LT1790A-4.096. The device draws up to 260µA from VREF at 500ksps, so the reference must be stable under this dynamic load and properly decoupled with 10µF tantalum + 0.1µF ceramic capacitors.
How does the auto-shutdown feature work in the LTC2302IDD#TRPBF?
The LTC2302IDD#TRPBF automatically scales supply current based on sampling rate: 2.8mA at 500ksps, ~700µA at 10ksps, and 14µA at 1ksps. This occurs without external control signals - the internal logic detects idle periods between conversions and powers down non-essential circuitry. No configuration register or command is needed; the behavior is inherent to the device's architecture and applies across its full temperature range.
Can the LTC2302IDD#TRPBF interface directly with a 3.3V microcontroller?
Yes, the LTC2302IDD#TRPBF supports direct 3.3V MCU interfacing via its independent OVDD pin (2.7V to 5.25V range). When OVDD = 3.3V, SDO outputs valid logic levels compatible with 3.3V CMOS inputs, while VDD remains at 5V for optimal analog performance. This eliminates level-shifter components and simplifies isolation barrier design in mixed-voltage systems.
What is the meaning of the "#TRPBF" suffix in LTC2302IDD#TRPBF?
The "#TRPBF" suffix indicates tape-and-reel packaging (TR), lead-free finish (P), and RoHS-compliant (B) construction with halogen-free materials (F). This variant is supplied in standard 2500-piece reels, suitable for automated SMT assembly. The "IDD" portion specifies the industrial temperature grade (–40°C to +85°C) and 10-pin DFN package (DD), distinguishing it from commercial-grade (CDD) or 2-channel (LTC2306) variants.
LTC2302IDD#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:
- 1
- 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:
- -
LTC2302IDD#TRPBF FAQ
1.How can I place an order for LTC2302IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2302IDD#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 LTC2302IDD#TRPBF reliable?
The price and inventory of LTC2302IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2302IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2302IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2302IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2302IDD#TRPBF?
LTC2302IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2302IDD#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 LTC2302IDD#TRPBF?
For technical support, including LTC2302IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2302IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2302IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2302IDD#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 LTC2302IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2302IDD#TRPBF?
All LTC2302IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2302IDD#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 LTC2302IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2302IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2302IDD#TRPBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
