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Analog Devices Inc. LTC1852CFW#TR
- Part No.:
- LTC1852CFW#TR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1852CFW#TR.pdf
- Description:
- IC ADC 10BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
LTC1852CFW#TR from Analog Devices (formerly Linear Technology) is a 10-bit, 8-channel, 400ksps successive-approximation ADC with integrated multiplexer, internal 2.5V reference, and parallel digital interface. It supports single-ended/differential inputs, unipolar/bipolar operation, and dual gain ranges (1×/2×), enabling flexible data acquisition in industrial sensor systems requiring high channel density and low power.
For engineers reviewing the LTC1852CFW#TR datasheet, LTC1852CFW#TR pinout, LTC1852CFW#TR application, or LTC1852CFW#TR equivalent, key selection considerations include its 48-lead TSSOP package, 2.7V–5.5V dual-supply operation (VDD/OVDD), scan-mode sequencer, and 3mW power consumption at 250ksps - critical for battery-powered test equipment and embedded process monitoring.
Technical Context
The LTC1852CFW#TR implements a capacitive SAR architecture with integrated sample-and-hold, supporting acquisition times as low as 150ns and conversion times of 2.0μs at 5.5V. Its programmable sequencer stores up to 16 channel configurations (address, gain, polarity, differential mode) and supports readback via dedicated S0–S6 status bits on data pins.
Reference flexibility is achieved through REFIN-controlled buffer output: tying REFIN to GND yields 2.048V on REFCOMP; applying 2.5V yields 4.096V; external drive is supported when REFIN = VDD. The 14-bit parallel output includes D9–D0 plus A2OUT/A1OUT/A0OUT/DIFFOUT, all referenced to OVDD/OGND for 3V/5V logic compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonic transfer function for control-loop feedback integrity. |
| Sampling Rate | 400ksps max at VDD = 5.5V - supports real-time spectral analysis of signals up to 200kHz Nyquist bandwidth. |
| Integral Linearity | ±0.25 LSB (typ), ±1 LSB (max) - ensures <0.1% full-scale error across temperature for precision sensor digitization. |
| Power Consumption | 3mW at 250ksps, 2.7V - enables continuous operation in energy-constrained portable instrumentation. |
| Analog Input Range | 0–REFCOMP (unipolar) or ±REFCOMP/2 (bipolar) - configurable full-scale spans of 4.096V, 2.5V, or 2.048V via REFIN pin strapping. |
| Digital Interface | 14-bit parallel output (D9–D0 + A2–A0 + DIFFOUT) with separate OVDD supply - simplifies interfacing to FPGA or microcontroller GPIO without level-shifting. |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade industrial control panels and lab-grade test fixtures. |
Pinout & Package
48-lead plastic TSSOP (FW package), 6.1mm body width, lead-free finish. Pin 1 marked by dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (1–8) | Analog Input Channels | Configurable as 8 single-ended inputs (vs COM) or 4 differential pairs (CH0/CH1, etc.) - supports mixed-signal sensor arrays. |
| COM (9) | Analog Input Common | Reference node for single-ended operation; disabled when DIFF = high - eliminates ground-loop errors in isolated front-ends. |
| REFOUT (10) | Internal 2.5V Reference Output | Stable 2.5V source (±15ppm/°C) for external circuitry; requires 1μF bypass - reduces BOM count in compact designs. |
| REFCOMP (12) | Reference Buffer Output | Programmable full-scale voltage (2.048V/4.096V) setting ADC input range - directly determines LSB size and dynamic range. |
| D9–D0 (21,22,23,24–30) | Parallel Data Outputs | 10-bit conversion result latched on BUSY rising edge - enables deterministic timing for synchronous data capture in real-time systems. |
| A2OUT/A1OUT/A0OUT (18–20) | MUX Address Outputs | Indicates active channel during conversion or sequencer address in readback mode - eliminates need for external address tracking logic. |
| BUSY (33) | Conversion Status Flag | Active-low open-drain signal synchronized to conversion completion - used as data-valid strobe for latch-based interfaces. |
| OVDD/OGND (35/34) | Digital Output Supply/Ground | Independent 2.7V–5.5V supply domain - allows direct connection to 3V microcontrollers without level translators. |
| CONVST (45) | Conversion Start Trigger | Falling-edge sensitive; initiates acquisition phase - supports precise timing control in time-triggered acquisition systems. |
| SHDN/CS (47/46) | Power Management Control | Combination selects Nap (1μA) or Sleep (20μA) shutdown - extends battery life in intermittent-sampling applications. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-step sequencer | Eliminates host CPU overhead for multi-channel scanning - enables autonomous cyclic acquisition without firmware intervention. |
| Flexible analog input configuration | Single-ended/differential, unipolar/bipolar, and 1×/2× PGA selection per channel - adapts to diverse sensor outputs (thermocouples, RTDs, strain gauges). |
| Internal reference with strappable outputs | Reduces external component count and layout sensitivity - 4.096V option provides exact 1mV/LSB scaling for 10-bit resolution. |
| Nap/Sleep shutdown modes | Reduces quiescent current to 1μA (Nap) or 20μA (Sleep) - critical for always-on condition monitoring nodes with infrequent sampling. |
| Scan mode with automatic channel cycling | Hardware-accelerated round-robin acquisition across all 8 channels - delivers deterministic latency for closed-loop control timing budgets. |
Applications
| Industrial Process Monitoring | Portable Test Equipment |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow sensors across 8 PLC I/O modules. IC Role / Device Role / Timing Role: Central 10-bit ADC acquiring synchronized samples from distributed analog sensors at 100ksps. Use Value: Integrated MUX and sequencer eliminate external analog switches and timing logic, reducing PCB area by >30% versus discrete solutions. |
Use Scenario: Handheld oscilloscope with 8-channel voltage measurement capability and battery operation. IC Role / Device Role / Timing Role: Low-power sampling ADC providing real-time waveform capture with 200kHz effective bandwidth. Use Value: 3mW at 250ksps enables >8 hours of continuous operation on a single Li-ion cell, meeting portable instrument runtime targets. |
| Automated Test Systems | Medical Sensor Interfaces |
Use Scenario: Production-line functional tester validating analog outputs of automotive ECUs under varying load conditions. IC Role / Device Role / Timing Role: High-accuracy ADC capturing transient responses during ECU power-up sequences. Use Value: ±0.25 LSB INL ensures pass/fail decisions meet ISO 16750-4 voltage transient test repeatability requirements. |
Use Scenario: Multi-parameter patient monitor acquiring ECG, SpO₂, and respiration signals simultaneously. IC Role / Device Role / Timing Role: Medical-grade data acquisition IC with bipolar input support for AC-coupled biopotential signals. Use Value: Bipolar ±2.048V range and 72.5dB SNR enable clean 12-bit-equivalent ECG digitization without external amplification stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7923BRUZ | 4-channel, 12-bit, SPI interface, no internal reference - requires external REF and serial interface logic. | Lower channel count; suited for space-constrained designs where serial interface is preferred over parallel. | Select AD7923BRUZ when board area is critical and host processor has SPI but limited GPIO; avoid if 8-channel parallel throughput is required. |
| LTC1850CFW#TR | Pin-compatible 10-bit upgrade with 1.25Msps sampling rate - identical pinout and feature set, higher speed. | Same footprint but higher power (15mW at 1.25Msps); requires faster timing margins and tighter layout for signal integrity. | Select LTC1850CFW#TR only when >400ksps sampling is mandatory; retain LTC1852CFW#TR for optimal power/performance trade-off in 400ksps systems. |
Compared with AD7923BRUZ, LTC1852CFW#TR offers double the channel count and integrated reference but consumes more board area; compared with LTC1850CFW#TR, it trades 84% lower power for 68% lower sampling rate - making it ideal for cost-sensitive, thermally constrained industrial DAQ where 400ksps suffices.
Availability
LTC1852CFW#TR is available at Aetrix Electronics and suitable for industrial process control, portable test equipment, and automated test systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1852CFW#TR 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 LTC1852CFW#TR belongs to ADI's legacy Linear Technology precision data acquisition family, designed specifically for embedded systems needing integrated, low-power, multi-channel ADC functionality without external support components.
FAQ
What is the maximum sampling rate of the LTC1852CFW#TR and under what conditions?
The LTC1852CFW#TR achieves a maximum sampling rate of 400ksps when powered from a 5.5V VDD supply. At lower supply voltages (e.g., 2.7V), the maximum rate drops to 250ksps due to internal timing constraints. This specification is guaranteed across the 0°C to 70°C operating temperature range and applies to both single-ended and differential input configurations. The LTC1852CFW#TR maintains full 10-bit performance at these rates without degradation in INL or SNR.
Does the LTC1852CFW#TR require an external reference, or does it include an internal one?
The LTC1852CFW#TR includes a fully integrated 2.5V bandgap reference with ±15ppm/°C temperature coefficient and 1.6384× buffer gain. It can operate autonomously using this internal reference (yielding 4.096V on REFCOMP when REFIN = 2.5V) or accept external references via REFIN/REFCOMP pins. No external reference is required for basic operation, though external precision references may be used for metrology-grade applications. The LTC1852CFW#TR reference architecture eliminates typical external reference and buffer amplifier components.
How does the programmable sequencer in the LTC1852CFW#TR reduce firmware overhead?
The LTC1852CFW#TR's 16-location sequencer stores channel address, gain (PGA), polarity (UNI/BIP), and differential mode (DIFF) settings in on-chip memory. Once programmed, it autonomously cycles through configurations without host intervention - eliminating polling loops or interrupt-driven channel switching. This hardware acceleration reduces MCU load by ~90% in 8-channel scan applications and ensures deterministic inter-sample timing critical for FFT-based analysis. The LTC1852CFW#TR sequencer also supports readback for runtime verification.
What are the power-down modes available on the LTC1852CFW#TR and their typical current draw?
The LTC1852CFW#TR offers two hardware-controlled power-down modes: Nap mode (SHDN = low, CS = low) draws 0.5μA typical, and Sleep mode (SHDN = low, CS = high) draws 20μA typical. Both modes retain register contents and allow wake-up via CONVST within 200ns (Nap) or 10ms (Sleep). These ultra-low quiescent currents enable energy harvesting and battery-powered applications where the LTC1852CFW#TR spends >99% of time in standby while maintaining rapid response capability.
Can the LTC1852CFW#TR interface directly with a 3V microcontroller, and how is this achieved?
Yes, the LTC1852CFW#TR interfaces directly with 3V microcontrollers using its independent OVDD supply pin (Pin 35). Digital outputs (D9–D0, A2OUT–A0OUT, DIFFOUT) are referenced to OVDD and OGND, allowing OVDD to be set to 3.0V while VDD remains at 5.0V for optimal analog performance. Input thresholds (VIH/VIL) are compatible with 3V logic levels, and output drive strength (±10mA) meets standard CMOS loading requirements. This dual-supply architecture eliminates level shifters in mixed-voltage systems using the LTC1852CFW#TR.
LTC1852CFW#TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- 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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1852CFW#TR FAQ
1.How can I place an order for LTC1852CFW#TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1852CFW#TR 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 LTC1852CFW#TR reliable?
The price and inventory of LTC1852CFW#TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1852CFW#TR is usually 5 days.
3.What payment methods are accepted for LTC1852CFW#TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1852CFW#TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1852CFW#TR?
LTC1852CFW#TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1852CFW#TR 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 LTC1852CFW#TR?
For technical support, including LTC1852CFW#TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1852CFW#TR requirements.
6.How does Aetrix verify that LTC1852CFW#TR is sourced from the original manufacturer or authorized distributors?
All LTC1852CFW#TR 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 LTC1852CFW#TR meets industry standards.
7.What is the process for return or replacement of LTC1852CFW#TR?
All LTC1852CFW#TR units undergo pre-shipment inspection (PSI). If there is an issue with LTC1852CFW#TR, 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 LTC1852CFW#TR part is unused and in its original packaging.
Return procedure for LTC1852CFW#TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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