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Analog Devices Inc. LTC2357CLX-16#PBF
- Part No.:
- LTC2357CLX-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2357CLX-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:284
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Product details
Overview
LTC2357CLX-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 capability, 350ksps per channel throughput, and integrated 4.096V reference buffer. It operates from ±15V analog supplies and 5V digital supply, delivering 94.2dB SNR and ±1LSB INL in true bipolar mode - ideal for high-voltage industrial data acquisition systems requiring precise multi-channel synchronization.
For engineers reviewing the LTC2357CLX-16#PBF datasheet, LTC2357CLX-16#PBF pinout, LTC2357CLX-16#PBF application, or LTC2357CLX-16#PBF equivalent, this page provides verified technical context, SoftSpan™ configuration flexibility, CMOS/LVDS interface options, rail-to-rail overdrive tolerance, and real-world application guidance for power line monitoring, PLCs, and test equipment design.
Technical Context
The LTC2357CLX-16#PBF implements a 4-channel simultaneous sampling architecture using independent SAR converters per channel, each with picoamp-input analog buffers enabling direct connection to high-impedance sources. Its SoftSpan™ input range selection (±10.24V, 0–10.24V, ±5.12V, 0–5.12V) is configured per conversion via SPI register writes, not hardware pins.
It supports dual serial interfaces: pin-selectable CMOS (1.8V–5V OVDD) with 1–4 data lanes, and LVDS with differential clock/data pairs. Internal conversion clock eliminates latency, and 128dB CMRR at 200Hz ensures robust rejection of common-mode noise in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes and full dynamic range for precision measurement applications. |
| Sampling Rate | 350ksps per channel (simultaneous) - enables real-time capture of fast transients across all four channels without time skew. |
| INL | ±1LSB max (±10.24V range) - ensures accurate end-point linearity critical for calibration-sensitive systems. |
| SNR | 94.2dB typical (fIN = 2kHz) - delivers >15.6 effective bits, supporting high-fidelity signal reconstruction. |
| Input Leakage | 5pA max (C-grade, 85°C) - minimizes loading error on high-impedance sensor outputs and passive filter networks. |
| CMRR | 128dB typical (200Hz) - suppresses common-mode interference from motor drives or switching power supplies. |
| Power Dissipation | 175mW (4-channel active) - enables thermally constrained designs without forced cooling in industrial enclosures. |
Pinout & Package
48-lead (7mm × 7mm) plastic LQFP package (LX), RoHS-compliant, with exposed pad for thermal management. Pin functions validated per Linear/ADI datasheet rev 235716f.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ / IN0– to IN3+ / IN3– | Differential analog inputs (x4) | Buffered, wide common-mode (VEE + 4V to VCC – 4V), ±12.5V overdrive tolerant - accept true bipolar or unipolar signals directly. |
| VCC / VEE | Analog supply rails | Support ±15V operation (7.5V ≤ VCC ≤ 38V, –16.5V ≤ VEE ≤ 0V); enable high-voltage signal conditioning without external level-shifting. |
| VDD / OVDD | Digital core & I/O supply | VDD = 4.75–5.25V for logic; OVDD = 1.71–5.25V (CMOS) or 2.375–5.25V (LVDS) - supports mixed-voltage system interfacing. |
| REFBUF / REFIN | Reference buffer output & input | REFBUF = 4.096V (typ), 47µF bypass required; REFIN accepts 1.25–2.2V external reference or disables internal buffer when grounded. |
| CS / SCKI / SDI / SDO0–SDO3 / BUSY / CNV | Serial interface control & data | Configurable CMOS (1–4 lane) or LVDS interface; CNV initiates conversion; BUSY indicates active conversion; no cycle latency. |
| PD | Power-down control | Active-high; reduces current to <1µA (C/I-grade) - enables low-power sleep modes between acquisition bursts. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan™ range selection | Independent software-configurable input ranges (±10.24V, 0–10.24V, ±5.12V, 0–5.12V) per conversion - eliminates external gain-switching circuitry. |
| Integrated reference buffer | 4.096V output with 13kΩ input impedance and 1.5mA drive capability - powers external circuits while maintaining ADC accuracy. |
| Rail-to-rail input overdrive tolerance | Withstands ±(VCC – VEE) differential overvoltage without latch-up - protects against transient surges in industrial field wiring. |
| 128dB CMRR at 200Hz | Rejects common-mode noise from variable-frequency drives or EMI-coupled ground loops - improves measurement integrity in harsh environments. |
| Simultaneous sampling with aperture matching | 150ps max aperture delay mismatch between channels - preserves phase coherence for multi-phase power analysis and vibration monitoring. |
Applications
| Power Line Monitoring | Programmable Logic Controllers |
|---|---|
|
Use Scenario: Real-time acquisition of voltage/current waveforms across three phases plus neutral in medium-voltage substations. IC Role / Device Role / Timing Role: Simultaneous 4-channel digitization of isolated CT/PT outputs with synchronized sampling and ±10.24V input range. Use Value: Enables harmonic distortion analysis (THD = –110dB) and fault detection with sub-cycle timing resolution (aperture jitter = 3ps RMS). |
Use Scenario: High-accuracy analog input module for modular PLC backplanes handling temperature, pressure, and position feedback. IC Role / Device Role / Timing Role: Buffered 16-bit ADC with picoamp leakage (<5pA) and 128dB CMRR - interfaces directly to RTD bridges and strain gauges. Use Value: Eliminates external instrumentation amplifiers and reference buffers, reducing BOM count and board area by >30% versus discrete solutions. |
| Industrial Process Control | Test and Measurement Equipment |
|
Use Scenario: Closed-loop control of chemical reactor parameters (pH, flow, pressure) requiring long-term stability and noise immunity. IC Role / Device Role / Timing Role: Precision ADC with ±0.025% full-scale error drift (2.5ppm/°C) and zero-scale error drift of ±4µV/°C. Use Value: Maintains calibration integrity over 0°C–70°C operating range without periodic recalibration - extends maintenance intervals. |
Use Scenario: Modular digitizer card in automated test equipment capturing fast transients and multi-tone signals. IC Role / Device Role / Timing Role: Dual-interface (CMOS/LVDS) ADC supporting high-speed streaming to FPGA or ASIC with 350ksps/channel sustained rate. Use Value: LVDS mode delivers 200mW power dissipation with 112dB SFDR - meets spectral purity requirements for RF stimulus-response testing. |
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 |
|---|---|---|---|
| AD7606C-16 | 16-bit, 8-channel, ±10V range, 1MSPS aggregate (125ksps/ch), internal reference only (no buffer), parallel/serial interface | Higher channel count but lower per-channel speed; lacks SoftSpan™ flexibility and buffered inputs | Select when needing >4 channels or higher aggregate throughput, but accept reduced input flexibility and higher layout complexity. |
| ADS8684 | 16-bit, 4-channel, ±10.24V range, 500ksps/ch, integrated PGA (±0.25V to ±12.28V), SPI-only, no LVDS option | Includes programmable gain amplifier; lower SNR (91.5dB) and higher power (220mW) | Select when signal conditioning (gain/attenuation) must be integrated on-chip, and LVDS interface is unnecessary. |
Compared with AD7606C-16 and ADS8684, the LTC2357CLX-16#PBF uniquely combines per-channel SoftSpan™ range reconfiguration, picoamp buffered inputs, LVDS/CMOS dual interface, and 128dB CMRR - making it optimal for synchronized, high-common-mode industrial sensing where signal integrity and layout simplicity are prioritized over raw channel count or speed.
Availability
LTC2357CLX-16#PBF is available at Aetrix Electronics and suitable for power line monitoring, programmable logic controllers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC2357CLX-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, 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 LTC2357 family was designed specifically for high-voltage, multi-channel industrial data acquisition - emphasizing simultaneous sampling accuracy, input flexibility, noise immunity, and robust operation in electrically hostile environments.
FAQ
What is the operating temperature range for the LTC2357CLX-16#PBF?
The LTC2357CLX-16#PBF is rated for 0°C to 70°C ambient operation (C-grade). This is confirmed in the "Order Information" table of the datasheet, where "LTC2357CLX-16#PBF" is explicitly listed with "0°C to 70°C" under Temperature Range. The "L" in "LX" denotes the 48-lead LQFP package, not temperature grade.
Does the LTC2357CLX-16#PBF require an external reference, or does it have an internal one?
The LTC2357CLX-16#PBF includes both an internal 2.048V reference (VREFIN) and an integrated 4.096V reference buffer (REFBUF). The REFBUF can be used directly as the ADC reference, or disabled to accept an external reference applied to the REFIN pin (1.25V–2.2V range). No external reference is required for standard operation.
Can the LTC2357CLX-16#PBF interface with a 1.8V microcontroller SPI bus?
Yes. The LTC2357CLX-16#PBF supports CMOS-level serial I/O with OVDD configurable from 1.71V to 5.25V. When OVDD = 1.8V, all digital inputs (CS, SCKI, SDI) meet 0.8×OVDD high-level and 0.2×OVDD low-level thresholds, and outputs (SDO, BUSY) are fully compatible - enabling direct connection to 1.8V logic without level shifters.
How does the SoftSpan™ feature work on the LTC2357CLX-16#PBF?
SoftSpan™ allows each of the four channels on the LTC2357CLX-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. This is implemented in firmware - no hardware changes or external components are needed to switch ranges dynamically during operation.
What is the maximum analog input common-mode voltage range for the LTC2357CLX-16#PBF?
The LTC2357CLX-16#PBF supports a common-mode input range of VEE + 4V to VCC – 4V (per Absolute Maximum Ratings and Electrical Characteristics tables). With standard ±15V supplies (VCC = +15V, VEE = –15V), this yields –11V to +11V - sufficient for ±10.24V differential signals with margin, and compatible with arbitrary common-mode offsets up to 30VP-P.
LTC2357CLX-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:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2357CLX-16#PBF FAQ
1.How can I place an order for LTC2357CLX-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2357CLX-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 LTC2357CLX-16#PBF reliable?
The price and inventory of LTC2357CLX-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 LTC2357CLX-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2357CLX-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2357CLX-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2357CLX-16#PBF?
LTC2357CLX-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2357CLX-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 LTC2357CLX-16#PBF?
For technical support, including LTC2357CLX-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2357CLX-16#PBF requirements.
6.How does Aetrix verify that LTC2357CLX-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2357CLX-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 LTC2357CLX-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2357CLX-16#PBF?
All LTC2357CLX-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2357CLX-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 LTC2357CLX-16#PBF part is unused and in its original packaging.
Return procedure for LTC2357CLX-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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