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Analog Devices Inc. LTC2356CMSE-14#TRPBF
- Part No.:
- LTC2356CMSE-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC2356CMSE-14#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,469
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Product details
Overview
LTC2356CMSE-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, single 3.3V supply operation, ±1.25V bipolar input range, and 74.1 dB SINAD at 100 kHz - designed for high-speed portable data acquisition in space-constrained systems.
For engineers reviewing the LTC2356CMSE-14#TRPBF datasheet, LTC2356CMSE-14#TRPBF pinout, LTC2356CMSE-14#TRPBF application, or LTC2356CMSE-14#TRPBF equivalent, key selection criteria include sampling rate vs. power trade-off (18 mW active, 13 µW sleep), common-mode rejection (80 dB @ 1 MHz), SPI-compatible 3-wire interface timing, and MSOP-10 package thermal performance (θJA = 40°C/W).
Technical Context
The LTC2356CMSE-14#TRPBF implements a fully differential sample-and-hold front-end with 13 pF input capacitance and 39 ns acquisition time, enabling accurate sampling of fast-changing signals up to 50 MHz full-power bandwidth. Its internal 2.5 V bandgap reference (±15 ppm/°C tempco) supports overdrive with external references from 2.55 V to VDD.
Conversion is triggered on the rising edge of CONV; output data appears on SDO over 16 SCK cycles in 2's complement format. Nap (4 mW) and Sleep (13 µW) shutdown modes are entered via specific CONV pulse sequences with SCK held static, supporting dynamic power management in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonic transfer function and deterministic code spacing for precision measurement. |
| Sampling Rate | 3.5 Msps maximum - enables real-time capture of signals up to 1.75 MHz (Nyquist) without undersampling. |
| SINAD | 74.1 dB at 100 kHz input - corresponds to ~13.7 effective bits, critical for high-fidelity signal reconstruction. |
| Power Dissipation | 18 mW active mode (5.5 mA @ 3.3 V) - allows integration into thermally constrained handheld instruments. |
| Common-Mode Rejection | 80 dB @ 1 MHz - suppresses ground-loop noise and EMI coupling in industrial sensor interfaces. |
| Input Range | ±1.25 V differential (–1.25 V to +1.25 V across AIN+–AIN–) - supports AC-coupled and bipolar sensor outputs without level-shifting. |
| Reference | Internal 2.5 V bandgap (±15 ppm/°C) - eliminates external reference component count while maintaining DC accuracy over temperature. |
Pinout & Package
Package: 10-lead MSOP (MSE), exposed pad (Pin 11) tied to GND - requires soldering to PCB thermal pad for θJA = 40°C/W and optimal noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+ | Noninverting analog input | Differential input node; accepts 0 V to VDD common-mode voltage with ±1.25 V swing relative to AIN–. |
| AIN– | Inverting analog input | Differential input node; complements AIN+ to enable true differential sampling and CMRR > 80 dB. |
| VREF | Reference buffer output | 2.5 V internal reference; must be bypassed with ≥10 µF ceramic capacitor to GND for stable conversion accuracy. |
| GND (Pins 4, 5, 6, 11) | Analog/digital ground & thermal pad | All four GND pins plus exposed pad must connect directly to solid analog ground plane to minimize noise and thermal resistance. |
| VDD | 3.3 V supply input | Single supply for entire device; requires local 10 µF + 0.1 µF bypassing near Pins 6/7 to suppress switching noise. |
| SDO | Three-state serial data output | 2's complement 14-bit result; tri-states when SCK is inactive - enables daisy-chaining multiple ADCs on shared bus. |
| SCK | Serial clock input | TTL/CMOS-compatible clock; rising edge clocks out data and advances conversion state machine. |
| CONV | Convert start input | Rising-edge-triggered; initiates sampling and conversion; also controls Nap/Sleep entry via pulse-count sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Differential input architecture | Enables rejection of common-mode noise up to 100 MHz without external instrumentation amplifiers. |
| Low-power shutdown modes | Sleep mode draws only 13 µW (4 µA @ 3.3 V), extending battery life in intermittent-sampling applications. |
| Integrated 2.5 V reference | Factory-trimmed bandgap with ±15 ppm/°C drift - eliminates calibration overhead and external reference cost. |
| 3-wire SPI-compatible interface | Requires only CONV, SCK, and SDO - reduces MCU GPIO count and simplifies PCB routing versus parallel interfaces. |
| MSOP-10 package with exposed pad | 2.5 mm × 4.4 mm footprint with low thermal resistance - suitable for compact portable medical and test equipment. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitoring units capturing temperature, pressure, and vibration waveforms at 1–3 Msps. IC Role / Device Role / Timing Role: Primary high-speed ADC digitizing conditioned sensor outputs; CONV synchronized to microcontroller timer for deterministic sampling intervals. Use Value: 3.5 Msps throughput and 74.1 dB SINAD preserve transient fidelity in vibration analysis; 13 µW sleep mode extends field deployment to >1 year on coin-cell batteries. |
Use Scenario: DIN-rail mounted PLC I/O modules acquiring 4–20 mA current loop signals with galvanic isolation. IC Role / Device Role / Timing Role: Isolated-side ADC converting differential outputs from isolated op-amps; uses internal 2.5 V reference to avoid reference voltage mismatch errors. Use Value: 80 dB CMRR rejects common-mode noise from motor drives and switching power supplies; ±1.25 V input range matches standard isolated amplifier outputs. |
| Multiphase Motor Control Feedback | RFID Reader Analog Front-End |
Use Scenario: Real-time current sensing in servo drives using shunt resistors and differential amplifiers. IC Role / Device Role / Timing Role: High-speed ADC sampling phase currents synchronously with PWM edges; Nap mode activated between commutation cycles. Use Value: 39 ns acquisition time supports <1 µs current sampling windows; 50 MHz full-power bandwidth captures harmonic content up to 5th motor current harmonic. |
Use Scenario: UHF RFID reader baseband processing of backscattered tag signals with narrowband filtering. IC Role / Device Role / Timing Role: Digitizing filtered IF signals after mixer and baseband amplifier; SPI interface enables direct connection to ARM Cortex-M4 host. Use Value: 74.1 dB SINAD ensures clean demodulation of weak tag responses; 3-wire interface minimizes pin count on compact reader PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IRGET | 16-bit, 1 Msps, 3.3 V supply, SPI interface; higher resolution but lower speed and no integrated reference. | Better DC accuracy for precision DC measurements; lacks 3.5 Msps capability for dynamic waveform capture. | Select when ENOB > 14 bits required and sampling rate ≤ 1 Msps suffices; requires external reference and driver optimization. |
| MAX11198ETE+ | 14-bit, 3 Msps, 2.5 V supply, internal reference; lower power (12 mW) but narrower input range (±0.5 V). | Lower supply voltage simplifies power design; reduced input span demands gain-stage redesign for ±1.25 V signals. | Select for ultra-low-power portable designs where ±0.5 V input compatibility exists; verify driver headroom with 2.5 V rail. |
Compared with ADS8860IRGET and MAX11198ETE+, the LTC2356CMSE-14#TRPBF uniquely balances 3.5 Msps speed, integrated 2.5 V reference, ±1.25 V input range, and MSOP-10 size - making it optimal for space- and power-constrained high-dynamic-range acquisition where neither pure DC precision nor ultra-low power alone dominates the requirement.
Availability
LTC2356CMSE-14#TRPBF is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor signal conditioning, multiphase motor control feedback, and RFID reader analog front-ends requiring stable component supply and guaranteed long-term sourcing.
Supply support for LTC2356CMSE-14#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, 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 LTC2356 family was designed by Linear Technology (acquired by ADI in 2017) to deliver high-speed, low-power, small-footprint SAR ADC performance for portable and space-constrained instrumentation - emphasizing ease of use through integrated reference and robust differential input architecture.
FAQ
What is the maximum sampling rate supported by the LTC2356CMSE-14#TRPBF?
The LTC2356CMSE-14#TRPBF supports a maximum sampling rate of 3.5 Msps. This is achieved with a 63 MHz SCK clock and two additional clock cycles allocated for acquisition time between conversions. At this rate, the minimum sampling period (tTHROUGHPUT) is 286 ns, and the device maintains 74.1 dB SINAD at 100 kHz input frequency. Performance degrades above 3.5 Msps due to insufficient acquisition time.
Does the LTC2356CMSE-14#TRPBF require an external reference voltage?
No, the LTC2356CMSE-14#TRPBF includes an internal 2.5 V bandgap reference with ±15 ppm/°C temperature coefficient and 2 ms settling time after wake-up from Sleep mode. It can be used directly by connecting a 10 µF ceramic capacitor from VREF (Pin 3) to GND. An external reference between 2.55 V and VDD may optionally overdrive VREF for improved accuracy or different input spans.
How does the Sleep and Nap shutdown mode work on the LTC2356CMSE-14#TRPBF?
The LTC2356CMSE-14#TRPBF enters Nap mode (4 mW) after two CONV pulses with SCK held static (high or low), and Sleep mode (13 µW) after four or more such pulses. Both modes retain register state and reference bias. Wake-up occurs on the first SCK edge or CONV rising edge. VREF re-stabilizes in 2 ms after Sleep exit, requiring one or more SCK cycles before valid conversions resume.
What is the absolute input voltage range allowed on AIN+ and AIN– for the LTC2356CMSE-14#TRPBF?
For the LTC2356CMSE-14#TRPBF, both AIN+ and AIN– must remain within 0 V to VDD (0 V to 3.6 V) at all times. The differential input range is ±1.25 V (i.e., AIN+ – AIN– ∈ [–1.25 V, +1.25 V]). Exceeding either limit causes clipping: differential input > +1.25 V yields all-ones output; < –1.25 V yields all-zeros. Input leakage is ≤1 µA over temperature.
Can the LTC2356CMSE-14#TRPBF interface directly with a standard SPI controller?
Yes, the LTC2356CMSE-14#TRPBF uses a 3-wire SPI-compatible interface (CONV, SCK, SDO) with no chip-select line. CONV replaces CS functionality - each rising edge initiates a new conversion. Data appears on SDO starting on the first SCK rising edge after CONV, with 16 bits transferred in 2's complement format. SDO tri-states when SCK is inactive, allowing multi-drop configurations.
LTC2356CMSE-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 3.5M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3.1V ~ 3.6V
- Voltage - Supply, Digital:
- 3.1V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-MSOP-EP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2356CMSE-14#TRPBF FAQ
1.How can I place an order for LTC2356CMSE-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2356CMSE-14#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 LTC2356CMSE-14#TRPBF reliable?
The price and inventory of LTC2356CMSE-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2356CMSE-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2356CMSE-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2356CMSE-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2356CMSE-14#TRPBF?
LTC2356CMSE-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2356CMSE-14#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 LTC2356CMSE-14#TRPBF?
For technical support, including LTC2356CMSE-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2356CMSE-14#TRPBF requirements.
6.How does Aetrix verify that LTC2356CMSE-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2356CMSE-14#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 LTC2356CMSE-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2356CMSE-14#TRPBF?
All LTC2356CMSE-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2356CMSE-14#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 LTC2356CMSE-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2356CMSE-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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