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Analog Devices Inc. LTC1852CFW#PBF
- Part No.:
- LTC1852CFW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
LTC1852CFW#PBF.pdf
- Description:
- IC ADC 10BIT SAR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
LTC1852CFW#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 400ksps, 8-channel 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, test equipment, and spectrum analyzers.
For engineers reviewing the LTC1852CFW#PBF datasheet, LTC1852CFW#PBF pinout, LTC1852CFW#PBF application, or LTC1852CFW#PBF equivalent, key selection criteria include its 48-lead TSSOP package, 2.7V–5.5V analog supply range, 3mW power consumption at 250ksps, and programmable sequencer supporting up to 16-channel scan modes - all critical for low-power, multi-sensor embedded measurement designs.
Technical Context
The LTC1852CFW#PBF implements a capacitive SAR architecture with integrated sample-and-hold, achieving ±0.25 LSB integral linearity and 72.5dB SNR at 40kHz input. Its analog front-end includes a configurable 8-channel multiplexer with COM-referenced single-ended or paired differential inputs (CH0–CH1, CH2–CH3, etc.), selectable via DIFF, A2–A0, UNI/BIP, and PGA pins.
Digital control uses dual mode-select pins (M0/M1) to enable Direct Address, Scan, Program, or Readback modes. The parallel 14-bit output bus (D9–D0 + A2OUT–A0OUT + DIFFOUT) operates from a separate OVDD supply (2.7V–5.5V), allowing direct interfacing with 3V or 5V logic while isolating analog and digital grounds (OGND/GND).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonic transfer function for reliable control-loop feedback. |
| Max Sampling Rate | 400ksps at VDD = 5.5V - supports real-time monitoring of fast transients in motor control or power quality analyzers. |
| Integral Linearity Error | ±0.25 LSB (typ) over full temperature range - ensures <0.025% full-scale accuracy across 0°C to 70°C operating envelope. |
| Analog Supply Range | 2.7V to 5.5V - enables direct compatibility with Li-ion battery-powered portable instruments and 5V industrial PLCs. |
| Power Consumption | 3mW at 250ksps / 5V - allows continuous high-speed sampling in thermally constrained enclosures without active cooling. |
| Reference Options | Internal 2.5V REFOUT (±15ppm/°C TC) or external 4.096V/2.5V/2.048V via REFCOMP - simplifies calibration-critical applications like precision weigh scales. |
| Digital I/O Supply | Separate OVDD (2.7V–5.5V) - eliminates level-shifter components when interfacing with mixed-voltage FPGA or microcontroller buses. |
Pinout & Package
48-lead plastic TSSOP (6.1mm wide), RoHS-compliant, lead-free finish. Pin 1 marked by dot; exposed pad not electrically connected.
| 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 - supports simultaneous voltage/current sensing in multi-sensor nodes. |
| COM (9) | Analog Input Common | Reference node for single-ended operation; disabled during differential mode - requires grounding to minimize noise coupling. |
| REFOUT (10) | 2.5V Reference Output | Stable buffered 2.5V source (±15ppm/°C) - used to drive external circuitry or calibrate auxiliary sensors without external reference IC. |
| REFCOMP (12) | Reference Buffer Output | Sets full-scale input span (e.g., ±2.048V bipolar); derived from REFIN × 1.6384 - enables precise gain scaling for 16-bit-equivalent dynamic range. |
| D9–D0 (21–30) | Parallel Data Outputs | 10-bit conversion result latched on BUSY rising edge - enables zero-wait-state readout in microcontroller GPIO-bus interfaces. |
| A2OUT–A0OUT (18–20) | MUX Address Outputs | 4-bit address (S5–S3) concurrent with data - allows firmware to verify channel identity without additional status registers. |
| BUSY (33) | Conversion Status Flag | Active-low open-drain signal synchronized to conversion completion - serves as hardware handshake for DMA-triggered data capture. |
| OVDD (35) | Digital Output Supply | Independent power rail for D9–D0, A2OUT–A0OUT, DIFFOUT - permits direct connection to 3.3V FPGA I/O banks while analog section runs at 5V. |
| SHDN (47) | Power Shutdown Control | Active-low input selecting Nap (CS low) or Sleep (CS high) mode - reduces current to 0.5mA or 20μA for battery-backed data loggers. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-step sequencer | Eliminates host CPU polling overhead by autonomously cycling through preconfigured channels, gain, and polarity settings - ideal for unattended environmental monitors. |
| Flexible input configuration | Single-ended/differential, unipolar/bipolar, and 1×/2× PGA selection via dedicated control pins - enables one hardware design to support multiple sensor types (thermocouples, RTDs, strain gauges). |
| Internal reference buffer | Delivers 2.5V REFOUT and programmable REFCOMP (2.048V/2.5V/4.096V) from single REFIN pin - removes need for external reference ICs and trimming resistors. |
| Low-power Nap/Sleep modes | Reduces supply current to 0.5mA (Nap) or 20μA (Sleep) while retaining sequencer memory - extends operational life in solar-powered remote telemetry units. |
| Parallel 14-bit output interface | Includes 10-bit data + 4-bit MUX address on dedicated pins - enables deterministic timing-critical reads without SPI/I²C protocol overhead in real-time control loops. |
Applications
| Industrial Process Monitoring | Portable Test Equipment |
|---|---|
|
Use Scenario: Continuous logging of temperature, pressure, and flow signals from 8 field transmitters in a chemical plant control cabinet. IC Role / Device Role / Timing Role: Central 8-channel ADC acquiring synchronized samples at 100ksps per channel using programmable sequencer and internal clock. Use Value: Eliminates need for 8 discrete ADCs and associated multiplexing logic, reducing BOM cost by 35% and PCB area by 42% versus discrete solutions. |
Use Scenario: Handheld oscilloscope-analyzer capturing transient waveforms from motor drives or power converters. IC Role / Device Role / Timing Role: High-speed sampling ADC with 400ksps throughput and 72.5dB SNR delivering clean baseband digitization for FFT-based spectral analysis. Use Value: Achieves 9.2 ENOB at Nyquist (200kHz), enabling accurate harmonic distortion measurements up to 5th order without external anti-alias filtering. |
| Medical Vital Sign Monitor | Automated Test Equipment (ATE) |
|
Use Scenario: Multi-parameter patient monitor acquiring ECG, SpO₂, and respiration signals simultaneously. IC Role / Device Role / Timing Role: Low-noise 10-bit ADC with differential input capability and programmable gain for amplifying microvolt-level biopotentials. Use Value: ±0.25 LSB INL and 60dB CMRR ensure clinical-grade accuracy in noisy hospital environments without additional calibration steps. |
Use Scenario: Rack-mounted ATE system validating mixed-signal ICs across production lots. IC Role / Device Role / Timing Role: Precision ADC with internal reference and scan-mode sequencing performing automated DC parametric tests on DUT analog pins. Use Value: Internal 2.5V reference (±15ppm/°C) and unipolar/bipolar flexibility eliminate external reference drift errors, improving test repeatability by ±0.01% FS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320IDB | 16-bit resolution, SPI interface, no integrated MUX or reference - requires external multiplexer and reference IC. | Better resolution but higher system complexity; lacks autonomous sequencer and parallel interface. | Choose for ultra-high-precision DC measurements where software-controlled channel sequencing is acceptable. |
| LTC1850CFW#PBF | Pin-compatible 10-bit upgrade with 1.25Msps sampling rate; identical pinout and feature set except speed. | Same footprint and firmware interface, but consumes ~2× more power at max speed. | Choose when sampling bandwidth >400ksps is required and thermal budget allows higher dissipation. |
Compared with ADS8320IDB, LTC1852CFW#PBF integrates MUX, reference, and parallel interface - reducing component count and layout complexity. Compared with LTC1850CFW#PBF, it trades 840ksps speed for 30% lower power at 250ksps, making it optimal for battery-operated or thermally constrained deployments.
Availability
LTC1852CFW#PBF is available at Aetrix Electronics and suitable for industrial process control, portable test instrumentation, and medical vital sign monitoring requiring stable component supply and long-term manufacturing continuity.
Supply support for LTC1852CFW#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1852CFW#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, multi-channel sensor interfacing in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the LTC1852CFW#PBF?
The LTC1852CFW#PBF supports a maximum sampling rate of 400ksps when powered from a 5.5V analog supply. At reduced 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 commercial temperature range and directly impacts achievable signal bandwidth in applications like vibration analysis or power quality monitoring.
Does the LTC1852CFW#PBF require an external reference voltage?
No, the LTC1852CFW#PBF includes an internal 2.5V reference with ±15ppm/°C temperature coefficient and buffered REFOUT/REFCOMP outputs. It can operate fully autonomously using this reference, or accept external references (2.048V, 2.5V, or 4.096V) applied to REFCOMP. The internal reference eliminates BOM cost and board space for external reference ICs in cost-sensitive designs.
How does the programmable sequencer in the LTC1852CFW#PBF reduce firmware overhead?
The LTC1852CFW#PBF's sequencer stores up to 16 channel configurations (address, gain, polarity, differential/single-ended) in internal memory. Once programmed, it autonomously cycles through them in Scan mode - eliminating CPU polling, interrupt servicing, and GPIO reconfiguration. This allows microcontrollers to enter low-power sleep between data reads, extending battery life in portable instruments using the LTC1852CFW#PBF.
Can the LTC1852CFW#PBF interface directly with a 3.3V microcontroller?
Yes. The LTC1852CFW#PBF features a separate OVDD supply pin (Pin 35) that powers all digital outputs (D9–D0, A2OUT–A0OUT, DIFFOUT). By connecting OVDD to 3.3V, the outputs swing between 0V and 3.3V - matching standard LVCMOS logic levels. This eliminates level-shifters and simplifies interface to ARM Cortex-M or RISC-V microcontrollers without compromising analog performance.
What is the purpose of the BUSY pin on the LTC1852CFW#PBF?
The BUSY pin (Pin 33) is an active-low, open-drain output signaling conversion status. It goes low at the falling edge of CONVST and remains low until conversion completes, then rises to indicate valid data on the parallel bus. Its rising edge can directly trigger microcontroller interrupts or latch strobes, enabling deterministic, zero-latency data capture - a critical feature for time-critical control loops using the LTC1852CFW#PBF.
LTC1852CFW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- PGA, Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1852CFW#PBF FAQ
1.How can I place an order for LTC1852CFW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1852CFW#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 LTC1852CFW#PBF reliable?
The price and inventory of LTC1852CFW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1852CFW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1852CFW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1852CFW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1852CFW#PBF?
LTC1852CFW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1852CFW#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 LTC1852CFW#PBF?
For technical support, including LTC1852CFW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1852CFW#PBF requirements.
6.How does Aetrix verify that LTC1852CFW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1852CFW#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 LTC1852CFW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1852CFW#PBF?
All LTC1852CFW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1852CFW#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 LTC1852CFW#PBF part is unused and in its original packaging.
Return procedure for LTC1852CFW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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