My Inquiry
My Account
Analog Devices Inc. LTC1408IUH-12#TRPBF
- Part No.:
- LTC1408IUH-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC1408IUH-12#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1408IUH-12 from Analog Devices (formerly Linear Technology) is a 12-bit, 6-channel simultaneous-sampling analog-to-digital converter with 600ksps aggregate throughput and 100ksps per channel. It operates from a single 3V supply, draws 5mA active current, features 83dB CMRR, and supports both unipolar (0V–2.5V) and bipolar (±1.25V) differential input ranges via the BIP pin. It is used in multiphase power measurement and motor control systems requiring synchronized voltage/current sampling.
For engineers reviewing the LTC1408IUH-12 datasheet, LTC1408IUH-12 pinout, LTC1408IUH-12 application, or LTC1408IUH-12 equivalent, key selection criteria include simultaneous sampling capability, 72dB SINAD at 100kHz, 3-wire SPI-compatible serial interface, SLEEP mode (6µW), and 32-pin 5mm × 5mm QFN package with exposed thermal pad.
Technical Context
The LTC1408IUH-12 integrates six independent sample-and-hold circuits triggered synchronously on the rising edge of the CONV signal, enabling true simultaneous acquisition across all channels. Its internal 2.5V bandgap reference (±15ppm/°C tempco) can be overdriven by an external reference up to VDD.
Conversion sequencing is controlled by SEL2/SEL1/SEL0, supporting 1–6 channel conversions in programmable order; output data is MSB-first, 12-bit per channel, delivered in 96-clock frames. The device implements two low-power states: NAP (3.3mW) and SLEEP (6µW), entered via specific CONV pulse sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function for precision control loop feedback. |
| Sampling Rate | 600ksps aggregate / 100ksps per channel - enables real-time capture of 50kHz fundamental waveforms with >20× oversampling. |
| SINAD | 72dB typical at 100kHz - supports ≥11.6 effective bits for high-fidelity sensor signal digitization. |
| CMRR | 83dB at 100kHz - rejects ground-loop noise and common-mode interference in industrial motor drive environments. |
| Power Consumption | 15mW active, 6µW SLEEP - suitable for battery-backed power monitoring and portable instrumentation. |
| Input Range | 0V–2.5V unipolar or ±1.25V bipolar differential - configurable via BIP pin for AC-coupled or DC-coupled signal chains. |
| Package | 32-pin QFN (5mm × 5mm) with exposed GND pad - provides low thermal resistance (θJA = 34°C/W) for stable operation in compact enclosures. |
Pinout & Package
Package: 32-pin plastic QFN (5mm × 5mm), exposed thermal pad (Pin 33) soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0+ to CH5+ | Non-inverting analog inputs (6 pairs) | Differential input terminals accepting rail-to-rail common-mode (0V–VDD) with ±1.25V or 0V–2.5V differential swing. |
| CH0– to CH5– | Inverting analog inputs (6 pairs) | Complement terminals completing differential pairs; full 83dB CMRR requires matched trace lengths and impedances. |
| CONV | Convert start trigger | Rising-edge synchronous sampling command; also controls NAP/SLEEP entry via pulse count with static SCK. |
| SCK | Serial clock input | Drives conversion timing and serial data output; 100ns–10µs period range supports flexible host controller interfacing. |
| SDO | Three-state serial data output | MSB-first 12-bit words for CH0–CH5 in sequence; tri-states when not actively shifting data. |
| BIP | Bipolar/unipolar mode select | Static logic level during conversion determines output coding format (2's complement vs. straight binary) and input range. |
| SEL2/SEL1/SEL0 | Channel selection control | 3-bit code defines number of active channels (1–6); must remain stable during conversion and readout cycles. |
| VREF | Internal 2.5V reference output | Bypassed with 10µF + 0.1µF to GND; externally overdrivable from 2.55V to VDD for improved accuracy or system-level reference sharing. |
| VCC/VDD/OGND/DGND/GND | Analog/digital supply and ground returns | Separate analog (VCC, GND pins 6/9/12/13/16/19/22) and digital (VDD, DGND, OGND) paths required to maintain 72dB SINAD performance. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling | Six independent S&H circuits triggered by one CONV edge - eliminates phase skew between channels for accurate vector calculations in power electronics. |
| Configurable input range | BIP pin selects unipolar (0V–2.5V) or bipolar (±1.25V) mode - enables direct interface to current-sense amplifiers or isolated voltage sensors without external level-shifting. |
| Low-power shutdown modes | SLEEP (6µW) and NAP (3.3mW) reduce system standby power - critical for always-on energy meters and uninterruptible power supplies. |
| High CMRR (83dB) | Rejects common-mode noise from switching power stages - allows clean acquisition in noisy motor drive inverters without additional filtering. |
| Flexible channel selection | SEL2/SEL1/SEL0 enable partial-channel conversion (1–6) - increases effective throughput for subsets (e.g., 3 channels @ 200ksps) without firmware overhead. |
| 3-wire SPI-compatible interface | SDO/SCK/CONV require only three MCU GPIOs - simplifies integration into resource-constrained microcontrollers without dedicated SPI hardware. |
Applications
| Multiphase Power Measurement | Multiphase Motor Control |
|---|---|
Use Scenario: Real-time monitoring of line-to-line voltages and phase currents in 3-phase AC inverters or energy meters. IC Role / Device Role / Timing Role: Simultaneous sampling of six differential inputs (3× voltage, 3× current) ensures coherent phasor calculation and power factor correction. Use Value: 200ps channel-to-channel aperture skew preserves <1° phase error at 50Hz, enabling Class 0.2 metering accuracy per IEC 62053-21. | 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: Synchronized capture of motor phase currents and bus voltage for precise PWM timing and torque ripple minimization. Use Value: 72dB SINAD supports >12-bit effective resolution in 10kHz bandwidth, enabling smooth low-speed operation down to 1RPM. |
| Data Acquisition Systems | Uninterruptible Power Supplies |
Use Scenario: Modular industrial DAQ modules acquiring vibration, temperature, and strain signals from distributed sensors. IC Role / Device Role / Timing Role: High-channel-count front-end with low power and small footprint for slot-limited rack-mounted systems. Use Value: 5mA active current and 5mm × 5mm QFN allow 16-channel density per 100mm² PCB area, reducing system size and cooling requirements. | Use Scenario: Battery-backed UPS units performing real-time AC input quality analysis and DC bus health monitoring. IC Role / Device Role / Timing Role: Dual-role ADC capturing both AC waveform distortion (THD < –86dB) and DC bus sag/fault events with fast wake-from-SLEEP response. Use Value: 2ms VREF settling after SLEEP exit enables sub-10ms transition to full measurement readiness - critical for seamless transfer to battery backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8588SIRTVR | 16-bit, 8-channel, 100ksps/ch, SPI interface, 3.3V supply, 15mW active power | Higher resolution but lower sampling rate; requires external reference and separate AVDD/DVDD supplies | Preferred when >12-bit DC accuracy is required for calibration-grade instrumentation, not for high-speed control loops. |
| AD7606C-18 | 18-bit, 8-channel, 1MSPS aggregate, parallel + SPI interface, ±5V/±10V input range, 120mW active power | Wider input range and higher resolution, but larger 64-lead LQFP package and 4× higher power consumption | Selected for high-precision test equipment where board space and power budget permit; not suitable for portable or thermally constrained designs. |
Compared with ADS8588SIRTVR and AD7606C-18, the LTC1408IUH-12 delivers optimal balance of simultaneous sampling fidelity, ultra-low power, and compact QFN packaging - making it uniquely suited for space- and energy-constrained embedded power electronics where 12-bit resolution at 100ksps/ch meets system requirements.
Availability
LTC1408IUH-12 is available at Aetrix Electronics and suitable for multiphase power measurement, motor control systems, and uninterruptible power supplies requiring stable component supply and guaranteed long-term availability.
Supply support for LTC1408IUH-12 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 LTC1408IUH-12 belongs to ADI's precision data acquisition portfolio, designed specifically for demanding real-time control and monitoring applications where simultaneous sampling, low power, and robust noise immunity are essential.
FAQ
What is the operating temperature range for the LTC1408IUH-12?
The LTC1408IUH-12 is specified for operation from –40°C to +85°C (industrial grade), as indicated by the "I" suffix in the part number. This range is validated across all key specifications including INL (±0.25LSB), offset error (±1mV), and SINAD (72dB), ensuring reliable performance in harsh industrial environments where the LTC1408IUH-12 is commonly deployed.
How does the LTC1408IUH-12 achieve simultaneous sampling across six channels?
The LTC1408IUH-12 achieves true simultaneous sampling using six independent sample-and-hold (S&H) circuits, each tied to its own differential input pair (CH0+/- through CH5+/-). All six S&H units are triggered by the same rising edge of the CONV signal, ensuring aperture skew is limited to 200ps - a critical feature that preserves phase coherence for the LTC1408IUH-12 in power and motor control applications.
Can the LTC1408IUH-12 use an external reference, and what are the voltage limits?
Yes, the LTC1408IUH-12 supports external reference override via the VREF pin. An external reference between 2.55V and VDD (max 4V) can be applied to improve absolute accuracy or synchronize multiple LTC1408IUH-12 devices. When using an external reference, the internal 2.5V bandgap is disabled, and reference tempco defaults to ±1ppm/°C - a significant improvement over the internal ±15ppm/°C spec.
What is the minimum acquisition time required for full 600ksps throughput?
The minimum acquisition time for full 600ksps aggregate throughput is 39ns, as specified in the datasheet under tACQ. This value assumes low source impedance (<100Ω) driving the analog inputs. With higher source impedances, acquisition time increases linearly; for example, a 1kΩ source raises tACQ to ~390ns, requiring reduced sampling rate or addition of a buffer amplifier to maintain LTC1408IUH-12 performance.
How do the SEL2/SEL1/SEL0 pins affect conversion throughput in the LTC1408IUH-12?
The SEL2/SEL1/SEL0 pins configure the number of active channels per conversion cycle: 000 = 1 channel (100ksps → 600ksps effective), 011 = 4 channels (100ksps → 150ksps effective), and 101/110/111 = 6 channels (100ksps each). This programmability allows the LTC1408IUH-12 to increase per-channel throughput when fewer channels are needed - e.g., 3 channels at 200ksps - without changing hardware or firmware timing.
LTC1408IUH-12#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:
- 12
- Sampling Rate (Per Second):
- 600k
- Number of Inputs:
- 6
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 6:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- 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 ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1408IUH-12#TRPBF FAQ
1.How can I place an order for LTC1408IUH-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1408IUH-12#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 LTC1408IUH-12#TRPBF reliable?
The price and inventory of LTC1408IUH-12#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1408IUH-12#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1408IUH-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1408IUH-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1408IUH-12#TRPBF?
LTC1408IUH-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1408IUH-12#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 LTC1408IUH-12#TRPBF?
For technical support, including LTC1408IUH-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1408IUH-12#TRPBF requirements.
6.How does Aetrix verify that LTC1408IUH-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1408IUH-12#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 LTC1408IUH-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1408IUH-12#TRPBF?
All LTC1408IUH-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1408IUH-12#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 LTC1408IUH-12#TRPBF part is unused and in its original packaging.
Return procedure for LTC1408IUH-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1408IUH-12#TRPBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
