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Analog Devices Inc. LTC2351HUH-14#TRPBF
- Part No.:
- LTC2351HUH-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2351HUH-14#TRPBF.pdf
- Description:
- IC ADC 14BIT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,452
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Product details
Overview
LTC2351HUH-14#TRPBF from Analog Devices (acquired Linear Technology) is a 14-bit, 1.5 Msps simultaneous-sampling ADC with six differential input channels, 75 dB SINAD at 100 kHz, 83 dB CMRR, and 250 ksps per channel throughput. It operates from a single 3 V supply, draws 6 mA active current (H-grade), and targets high-precision multiphase power measurement and motor control systems.
For engineers reviewing the LTC2351HUH-14#TRPBF datasheet, LTC2351HUH-14#TRPBF pinout, LTC2351HUH-14#TRPBF application, or LTC2351HUH-14#TRPBF equivalent, key selection criteria include simultaneous sampling integrity, bipolar/unipolar mode flexibility via BIP pin, 32-pin QFN thermal performance, and SPI-compatible serial interface timing compliance at 1.5 Msps aggregate rate.
Technical Context
The LTC2351HUH-14#TRPBF integrates six independent sample-and-hold circuits triggered synchronously on the rising edge of CONV, enabling true simultaneous acquisition across all channels. Its internal 2.5 V bandgap reference (±15 ppm/°C tempco) supports unipolar (0–2.5 V) or bipolar (±1.25 V) differential input ranges, selected by the BIP pin state.
Conversion sequencing is controlled by SEL2/SEL1/SEL0, allowing dynamic selection of 1–6 channels per cycle (e.g., 000 = CH0 only; 101 = all six). Output data is serialized MSB-first over SDO in 96-clock frames, compatible with standard 3-wire SPI interfaces, with aperture skew ≤200 ps and jitter ≤0.3 ps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision measurement. |
| Sampling Rate | 1.5 Msps aggregate / 250 ksps per channel - enables real-time capture of fast transients across six synchronized channels. |
| SINAD | 75 dB at 100 kHz (H-grade) - ensures ≥12.2 ENOB for clean signal digitization in noisy industrial environments. |
| CMRR | 83 dB at 100 kHz - suppresses ground-loop noise and common-mode interference in motor drive feedback loops. |
| Power Consumption | 16.5 mW active (3 V, 1.5 Msps) - supports portable and thermally constrained embedded DAQ systems. |
| Input Range | 0 V to 2.5 V unipolar or ±1.25 V bipolar differential - configurable via BIP pin without external level-shifting circuitry. |
| Aperture Skew | ≤200 ps channel-to-channel - preserves phase coherence critical for vector-controlled motor drives. |
Pinout & Package
Package: 32-pin (5 mm × 5 mm) plastic QFN with exposed pad (Pin 33 = GND), rated for –40°C to +125°C operation (H-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0+ to CH5+ | Noninverting analog inputs (6 pairs) | Differential sampling nodes; each pair accepts rail-to-rail common-mode (0–VDD) with ±1.25 V or 0–2.5 V differential swing. |
| CONV | Convert start trigger | Rising-edge synchronous sampling initiator; also controls Nap/Sleep modes via pulse count with static SCK. |
| SCK | Serial clock input | Drives conversion sequencing and data output timing; 96 cycles required for full 6-channel readout. |
| SDO | Three-state serial data output | MSB-first output of previous conversion's six 14-bit words; OVDD-referenced for flexible logic-level interfacing. |
| BIP | Bipolar/unipolar mode select | Static configuration pin: LOW = unipolar (straight binary), HIGH = bipolar (2's complement) output format. |
| SEL2/SEL1/SEL0 | Channel count selector | 3-bit code defines number of converted channels (1–6); must remain stable during conversion and data readout. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling architecture | Enables phase-accurate multi-sensor acquisition for vector control and power quality analysis without time-skew correction. |
| Configurable input range (BIP pin) | Eliminates need for external gain/level-shift stages when switching between unipolar sensor outputs and bipolar AC waveforms. |
| Low-power Nap (4.5 mW) and Sleep (12 μW) modes | Extends battery life in portable DAQ systems while retaining fast wake-up (<2 ms VREF settling) for burst-mode sampling. |
| High CMRR (83 dB) | Reduces sensitivity to ground potential differences in distributed motor drive cabinets or long-sensor-cable installations. |
| Integrated 2.5 V reference with external override | Provides stable conversion基准 without external components; supports higher-accuracy external references (2.55–VDD V) when needed. |
Applications
| Multiphase Power Measurement | Multiphase Motor Control |
|---|---|
Use Scenario: Real-time monitoring of voltage and current across three-phase inverters in UPS or solar microinverters. IC Role / Device Role / Timing Role: Simultaneously samples all phase voltages and currents at 250 ksps/channel to compute instantaneous power, THD, and harmonics. Use Value: 200 ps aperture skew preserves phase alignment for accurate vector calculations; 75 dB SINAD ensures <0.05% RMS error in 50/60 Hz fundamental measurements. | Use Scenario: Closed-loop field-oriented control (FOC) of PMSM or induction motors using back-EMF and current feedback. IC Role / Device Role / Timing Role: Captures synchronized current and position sensor signals to compute torque and flux vectors at PWM update rates. Use Value: Bipolar mode directly digitizes ±1.25 V current-sense amplifier outputs; simultaneous sampling eliminates cross-phase timing errors in torque ripple calculation. |
| Data Acquisition Systems | Uninterruptible Power Supplies |
Use Scenario: Modular industrial DAQ modules acquiring vibration, temperature, and strain from multiple sensors. IC Role / Device Role / Timing Role: Six differential inputs condition and digitize isolated analog signals with programmable channel count (via SELx) to match sensor count. Use Value: 32-pin QFN package enables compact 6-channel front-end design; low 6 mA H-grade current reduces thermal load in dense PCB layouts. | Use Scenario: Input/output voltage/current monitoring and battery health tracking in line-interactive UPS units. IC Role / Device Role / Timing Role: Measures AC mains, DC bus, and battery terminals simultaneously to detect sag/swell/failure events within 4 μs minimum throughput period. Use Value: 83 dB CMRR rejects common-mode noise from switching regulators; Sleep mode cuts standby power to 12 μW for >10-year battery-backed RTC support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8686SIPWR | 16-bit, 1 MSPS, 6-channel SAR ADC; integrated PGA and reference; requires external clock; no Nap/Sleep modes. | Higher resolution but lower speed; better for DC-precision applications (e.g., process control), less suited for high-bandwidth motor control. | Select when 16-bit ENOB and programmable gain outweigh need for sub-μs aperture skew and ultra-low sleep power. |
| AD7606C-16BSTZ | 16-bit, 1 MSPS, 8-channel simultaneous-sampling ADC; ±10 V/±5 V input range; 2.5 V reference; 60 mW active power. | Wider input range and more channels; higher power and larger 64-lead LQFP package; no BIP-selectable unipolar/bipolar mode. | Select when needing >6 channels or ±10 V industrial sensor interfacing, and thermal/power constraints allow 60 mW operation. |
Compared with ADS8686SIPWR and AD7606C-16BSTZ, the LTC2351HUH-14#TRPBF delivers superior channel-to-channel timing coherence (200 ps skew vs >5 ns), lowest active and sleep power in its class, and seamless bipolar/unipolar reconfiguration-making it optimal for thermally sensitive, phase-critical motor and power electronics applications.
Availability
LTC2351HUH-14#TRPBF is available at Aetrix Electronics and suitable for multiphase motor control, uninterruptible power supplies, and industrial data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for LTC2351HUH-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2351HUH-14#TRPBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding real-time control and power system monitoring where simultaneous sampling, low power, and wide temperature operation are essential.
FAQ
What is the operating temperature range for the LTC2351HUH-14#TRPBF?
The LTC2351HUH-14#TRPBF is rated for –40°C to +125°C operation (H-grade), making it suitable for under-hood automotive, industrial motor drives, and high-temperature power converter applications. This rating is validated per the Absolute Maximum Ratings table and applies across all specified electrical parameters including SINAD, CMRR, and offset error.
How does the BIP pin affect output data format in the LTC2351HUH-14#TRPBF?
When BIP = LOW, the LTC2351HUH-14#TRPBF outputs unipolar data in straight binary format (0x0000 to 0x3FFF for 0–2.5 V). When BIP = HIGH, it outputs bipolar data in 2's complement format (0x2000 = 0 V, 0x0000 = –1.25 V, 0x3FFF = +1.2499 V). The BIP pin must be held static during conversion and readout to avoid data corruption.
Can the LTC2351HUH-14#TRPBF convert fewer than six channels per cycle?
Yes-the LTC2351HUH-14#TRPBF supports 1–6 channel conversions via SEL2/SEL1/SEL0. For example, SELx = 000 converts only CH0 at 1.5 Msps, while SELx = 011 converts CH0–CH3 at 500 ksps each. This reduces total conversion time and increases per-channel throughput without sacrificing simultaneity within the selected subset.
What is the minimum acquisition time required for full-speed operation of the LTC2351HUH-14#TRPBF?
The LTC2351HUH-14#TRPBF requires a 39 ns sample-and-hold acquisition time (tACQ) to achieve full 1.5 Msps aggregate sampling. This assumes low-impedance driving sources; higher source impedances increase required acquisition time, necessitating external buffering to maintain accuracy at maximum throughput.
Does the LTC2351HUH-14#TRPBF support external reference voltage?
Yes-the LTC2351HUH-14#TRPBF allows overdriving the internal 2.5 V reference via the VREF pin with an external reference between 2.55 V and VDD. This enables improved absolute accuracy and lower tempco when paired with precision external references, while retaining all internal timing and sequencing functionality.
LTC2351HUH-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 1.5M
- Number of Inputs:
- 6
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 6:1
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2351HUH-14#TRPBF FAQ
1.How can I place an order for LTC2351HUH-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2351HUH-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 LTC2351HUH-14#TRPBF reliable?
The price and inventory of LTC2351HUH-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 LTC2351HUH-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2351HUH-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2351HUH-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2351HUH-14#TRPBF?
LTC2351HUH-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2351HUH-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 LTC2351HUH-14#TRPBF?
For technical support, including LTC2351HUH-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2351HUH-14#TRPBF requirements.
6.How does Aetrix verify that LTC2351HUH-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2351HUH-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 LTC2351HUH-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2351HUH-14#TRPBF?
All LTC2351HUH-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2351HUH-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 LTC2351HUH-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2351HUH-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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