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Analog Devices Inc. LTC2357ILX-16#PBF
- Part No.:
- LTC2357ILX-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2357ILX-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
LTC2357ILX-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, quad-channel simultaneous-sampling SAR ADC with buffered differential inputs, ±10.24V input range, 350ksps per channel throughput, and 94.2dB SNR - designed for high-voltage industrial data acquisition where common-mode rejection and input flexibility are critical.
For engineers reviewing the LTC2357ILX-16#PBF datasheet, LTC2357ILX-16#PBF pinout, LTC2357ILX-16#PBF application, or LTC2357ILX-16#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in power line monitoring and PLCs, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LTC2357ILX-16#PBF implements a true simultaneous sampling architecture across four independent picoamp-input channels, each configurable per-conversion via SoftSpan™ to accept ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V signals using an integrated 4.096V reference buffer. It operates from dual supplies (VCC = +7.5V to +38V, VEE = –16.5V to 0V) and supports both CMOS (1.8V–5V) and LVDS serial interfaces.
Its analog front-end features 128dB CMRR at 200Hz, rail-to-rail input overdrive tolerance, and 500pA max input leakage at 85°C. Conversion timing is deterministic with no cycle latency, internal clock generation, and aperture jitter of 3ps RMS - enabling precise phase-coherent multi-channel measurements in demanding industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full dynamic range utilization without code gaps in precision measurement systems. |
| Sampling Rate | 350ksps per channel (simultaneous) - supports real-time capture of fast transients across all four channels without interleaving artifacts. |
| INL | ±1LSB max (±10.24V range) - enables accurate absolute voltage measurement without calibration for most industrial sensor interfaces. |
| SNR | 94.2dB typical (fIN = 2kHz) - delivers >15.6 effective bits for high-fidelity signal reconstruction in test & measurement applications. |
| Input Common Mode Range | 30VP-P, VEE + 4V to VCC – 4V - allows direct digitization of high-common-mode signals (e.g., motor phase voltages) without external level-shifting circuitry. |
| Interface | Pin-selectable SPI CMOS (1.8V–5V) or LVDS - provides layout flexibility: CMOS for low-cost microcontroller interfacing, LVDS for noise-immune long-run connections. |
| Power Dissipation | 175mW at 350ksps/4ch (44mW/channel typical) - balances performance and thermal management in dense industrial I/O modules. |
Pinout & Package
48-lead (7mm × 7mm) plastic LQFP package (LX), RoHS-compliant, rated for –40°C to +85°C operation. Thermal resistance θJA = 53°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ / IN0– to IN3+ / IN3– | Differential analog inputs (4 channels) | High-impedance (≥1TΩ), buffered picoamp-input pairs supporting ±10.24V ranges and 128dB CMRR - eliminate need for external instrumentation amplifiers. |
| VCC / VEE | Analog supply rails | Wide-range dual supplies (VCC = +7.5V to +38V, VEE = –16.5V to 0V) enable direct connection to industrial ±15V or +24V/–12V systems. |
| REFBUF / REFIN | Reference buffer output and input | REFBUF provides 4.096V buffered reference; REFIN accepts 1.25V–2.2V external reference or disables internal buffer when grounded. |
| CS / SCKI / SDI / SDO0–SDO3 / BUSY / CNV | CMOS/LVDS serial interface control and data | Configurable 1–4 lane CMOS or differential LVDS output supports flexible data bus width and noise immunity - SDOx pins map directly to channel outputs. |
| PD | Power-down control | Active-high signal reduces current to ≤0.56μA - enables rapid wake-up (<200ms REFBUF settling) for duty-cycled monitoring systems. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan™ configuration | Independent selection of ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V range per conversion - eliminates external gain-switching circuitry and simplifies firmware-driven range adaptation. |
| Simultaneous sampling with matched aperture delay | 150ps max channel-to-channel aperture delay matching - preserves phase relationships between channels for accurate power quality analysis and motor control feedback. |
| Rail-to-rail input overdrive tolerance | Withstands ±(VCC – VEE) differential overvoltage without latch-up - protects against transient surges in industrial field wiring without external clamping diodes. |
| Integrated reference and buffer | 4.096V buffered reference with 5ppm/°C tempco and 20kΩ output impedance - removes need for external reference ICs and reduces BOM count in space-constrained designs. |
| Low input leakage | 5pA max (I-Grade, 85°C) - minimizes measurement error in high-impedance sensor interfaces (e.g., piezoelectric or thermocouple conditioning). |
Applications
| Power Line Monitoring | Programmable Logic Controllers |
|---|---|
|
Use Scenario: Real-time acquisition of three-phase voltage and current waveforms in utility substations or smart breakers. IC Role / Device Role / Timing Role: Simultaneous 4-channel sampling captures synchronized voltage/current pairs with <150ps inter-channel skew for accurate power factor and harmonic calculation. Use Value: Eliminates external sample-and-hold circuits and enables direct connection to ±10V CT/PT outputs - reducing component count and board area by ≥30%. |
Use Scenario: High-accuracy analog input module in modular PLC backplanes for factory automation I/O. IC Role / Device Role / Timing Role: Buffered 16-bit ADC with ±10.24V range digitizes 4 industrial sensor signals (e.g., 4–20mA loop receivers, RTD bridges) without signal conditioning. Use Value: 500pA input leakage and 128dB CMRR reject ground-loop noise in electrically noisy plant-floor environments - improving measurement stability by >20dB. |
| Industrial Process Control | Test and Measurement Equipment |
|
Use Scenario: Closed-loop control of chemical reactor temperature, pressure, and flow using multi-sensor fusion. IC Role / Device Role / Timing Role: SoftSpan™ per-channel range selection adapts to diverse sensor outputs (e.g., ±5V thermocouples, 0–10V pressure transducers) within one hardware design. Use Value: Reduces firmware complexity and eliminates external multiplexers or programmable gain amplifiers - shortening time-to-market for custom I/O modules. |
Use Scenario: Portable oscilloscope or power analyzer requiring high dynamic range and phase coherence across multiple channels. IC Role / Device Role / Timing Role: 94.2dB SNR and 91.2dB SINAD at 2kHz support >15-bit ENOB for spectral analysis of low-level signals amid high-amplitude fundamentals. Use Value: Enables single-shot FFT-based THD/SFDR measurement without averaging - accelerating production test throughput by 3× vs legacy 14-bit solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit, 500ksps/ch, single-supply (2.7–5.5V), no integrated reference buffer, ±10.24V range requires external op-amps. | Better suited for battery-powered portable instruments due to lower 35mW power; lacks simultaneous sampling - uses sequenced conversion. | Select when system uses single 3.3V/5V supply and can accommodate external signal conditioning; avoid if phase coherence across channels is required. |
| AD7606C-16BSTZ | 16-bit, 1MSPS/ch, ±10V range, integrated reference (2.5V), but only 107dB CMRR and 2.5μA input leakage at 85°C. | Higher speed for transient capture; lower CMRR and higher leakage limit use in high-noise industrial settings with wide common-mode swings. | Select for cost-sensitive, high-speed applications where 128dB CMRR and picoamp leakage are not mandatory - e.g., motor drive current sensing. |
Compared with ADS8684IPWR and AD7606C-16BSTZ, the LTC2357ILX-16#PBF uniquely combines simultaneous sampling, 128dB CMRR, and picoamp input leakage in a single 48-lead LQFP - making it the only option that meets stringent requirements for phase-accurate power quality analyzers and high-isolation PLC analog inputs.
Availability
LTC2357ILX-16#PBF is available at Aetrix Electronics and suitable for industrial process control, power line monitoring, and test and measurement equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC2357ILX-16#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2357 family was engineered specifically for high-voltage, multi-channel industrial data acquisition - emphasizing simultaneous sampling integrity, wide common-mode tolerance, and flexible input ranging to replace complex discrete front-end architectures.
FAQ
What is the operating temperature range for the LTC2357ILX-16#PBF?
The LTC2357ILX-16#PBF is rated for –40°C to +85°C operation, as indicated by the "I" grade suffix in the part number. This extends beyond the commercial-grade C version (0°C to 70°C) and supports deployment in harsh industrial enclosures and outdoor power infrastructure where ambient temperatures fluctuate widely.
Does the LTC2357ILX-16#PBF require an external reference voltage?
No - the LTC2357ILX-16#PBF includes an integrated 4.096V reference buffer (REFBUF) and internal 2.048V reference (REFIN). The REFBUF can be used directly, or REFIN can be overdriven with an external 1.25V–2.2V reference to disable the internal buffer and improve system-level accuracy and temperature drift performance.
How does the SoftSpan™ feature work on the LTC2357ILX-16#PBF?
SoftSpan™ allows each of the four channels on the LTC2357ILX-16#PBF to be independently configured per conversion for ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V input ranges via SPI register writes - eliminating external gain-switching components and enabling adaptive signal conditioning in software-defined instrumentation.
Can the LTC2357ILX-16#PBF interface directly with a 1.8V microcontroller?
Yes - the LTC2357ILX-16#PBF supports pin-selectable CMOS I/O with OVDD ranging from 1.71V to 5.25V. When OVDD is set to 1.8V, all digital inputs (CS, SCKI, SDI) and outputs (SDO0–SDO3, BUSY) operate at 1.8V logic levels, enabling seamless interfacing with low-voltage MCUs without level shifters.
What is the maximum allowable analog input voltage beyond the specified range for the LTC2357ILX-16#PBF?
The LTC2357ILX-16#PBF tolerates rail-to-rail input overdrive: analog inputs (INx+, INx–) may swing from VEE – 0.3V to VCC + 0.3V without damage or latch-up. For example, with VCC = +15V and VEE = –15V, inputs can safely reach –15.3V to +15.3V - protecting against transients in industrial field wiring.
LTC2357ILX-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 7.5V ~ 38V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2357ILX-16#PBF FAQ
1.How can I place an order for LTC2357ILX-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2357ILX-16#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 LTC2357ILX-16#PBF reliable?
The price and inventory of LTC2357ILX-16#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2357ILX-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2357ILX-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2357ILX-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2357ILX-16#PBF?
LTC2357ILX-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2357ILX-16#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 LTC2357ILX-16#PBF?
For technical support, including LTC2357ILX-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2357ILX-16#PBF requirements.
6.How does Aetrix verify that LTC2357ILX-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2357ILX-16#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 LTC2357ILX-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2357ILX-16#PBF?
All LTC2357ILX-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2357ILX-16#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 LTC2357ILX-16#PBF part is unused and in its original packaging.
Return procedure for LTC2357ILX-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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