My Inquiry
My Account
Analog Devices Inc. LTC1408CUH#PBF
- Part No.:
- LTC1408CUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC1408CUH#PBF.pdf
- Description:
- IC ADC 14BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:108
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1408CUH#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 6-channel simultaneous-sampling analog-to-digital converter with 600ksps aggregate sampling rate and 100ksps per-channel throughput. It operates from a single 3V supply, draws only 5mA active current, and delivers 76dB SINAD at 100kHz input. Its 90dB common-mode rejection and rail-to-rail differential input support enable high-accuracy multiphase power measurement in portable industrial data acquisition systems.
For engineers reviewing the LTC1408CUH#PBF datasheet, LTC1408CUH#PBF pinout, LTC1408CUH#PBF application, or LTC1408CUH#PBF equivalent, key selection criteria include simultaneous sampling integrity, 6µW SLEEP mode power, 32-pin 5mm × 5mm QFN package thermal performance, bipolar/unipolar input range configurability via BIP pin, and 3-wire serial interface timing compliance with 96-clock output framing.
Technical Context
The LTC1408CUH#PBF implements six independent sample-and-hold circuits triggered synchronously on the rising edge of CONV, enabling true simultaneous acquisition across all channels before sequential 14-bit conversion at 100ksps per channel. Its internal 2.5V bandgap reference (±15ppm/°C tempco) supports unipolar 0V–2.5V or bipolar ±1.25V differential input ranges, selectable via the BIP pin.
Conversion sequencing is controlled by SEL2/SEL1/SEL0, allowing dynamic selection of 1–6 active channels without reconfiguration overhead. The 3-wire serial interface outputs MSB-first 14-bit words for each enabled channel in fixed 96-clock cycles, with SDO three-state control and OVDD-supplied logic level shifting for mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision measurement applications. |
| Sampling Rate | 600ksps aggregate / 100ksps per channel - enables synchronized capture of fast transient events across six sensor inputs. |
| SINAD | 76dB at 100kHz - ensures ≥12.3 effective bits for high-fidelity signal reconstruction in motor control feedback loops. |
| Power Dissipation | 15mW active, 3.3mW NAP, 6µW SLEEP - supports battery-powered DAQ with rapid wake-up and low quiescent current. |
| Common-Mode Rejection | 90dB at 100kHz - eliminates ground-loop noise in distributed sensor networks with long analog traces. |
| Input Range | 0V to 2.5V unipolar or ±1.25V bipolar differential - configurable via BIP pin; supports both DC-coupled and AC-coupled sensor interfaces. |
| Package | 32-pin QFN (5mm × 5mm) with exposed thermal pad - provides low thermal resistance (θJA = 34°C/W) for stable operation in compact enclosures. |
Pinout & Package
The LTC1408CUH#PBF is housed in a 32-pin plastic QFN package (5mm × 5mm) with an exposed GND pad (Pin 33) requiring soldering to the PCB 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 voltage (0V to VDD) with ±1.25V or 0V–2.5V differential swing. |
| CH0– to CH5– | Inverting analog inputs (6 pairs) | Paired with corresponding CHx+ pins; defines differential input voltage and enables common-mode noise rejection. |
| CONV (Pin 30) | Convert start trigger | Rising-edge synchronous sampling command; two pulses enter NAP mode, four+ pulses enter SLEEP mode. |
| SEL2/SEL1/SEL0 (Pins 26–28) | Channel count selector | 3-bit binary control selecting 1–6 active channels per conversion cycle; must remain static during conversion and readout. |
| BIP (Pin 29) | Bipolar/unipolar mode select | Logic-high enables ±1.25V bipolar input range (2's complement output); logic-low enables 0V–2.5V unipolar range (straight binary). |
| SDO (Pin 1) | Serial data output | Three-state MSB-first output delivering six 14-bit words in 96-clock frames; level-shifted by OVDD supply. |
| SCK (Pin 32) | Serial clock input | Drives conversion sequencing and data output timing; 16 clocks per enabled channel, up to 96 total. |
| VREF (Pin 23) | Internal 2.5V reference output | Internally generated reference with 10µF bypass requirement; overridable by external 2.55V–VDD reference for improved accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling architecture | Six independent S/H circuits ensure zero inter-channel aperture skew (<200ps), critical for phase-accurate multiphase current/voltage monitoring. |
| Configurable input range | BIP pin selects unipolar (0V–2.5V) or bipolar (±1.25V) differential input, enabling flexible sensor interface without external level-shifting circuitry. |
| Low-power shutdown modes | SLEEP mode draws only 6µW (2.0–15µA), reducing standby power by >99.8% versus active mode-ideal for energy-constrained portable instrumentation. |
| Integrated 2.5V reference | On-chip bandgap reference with ±15ppm/°C tempco and 2ms wake-up settling time supports self-contained operation without external reference components. |
| Flexible serial interface | 3-wire SDO/SCK/CONV protocol with OVDD-level shifting allows direct connection to 1.8V, 2.5V, or 3.3V logic families without level translators. |
Applications
| Multiphase Power Measurement | Multiphase Motor Control |
|---|---|
Use Scenario: Real-time monitoring of line-to-line voltages and phase currents in 3-phase inverters or UPS systems. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing six synchronized analog inputs to compute instantaneous power, harmonic content, and imbalance metrics. Use Value: 90dB CMRR rejects common-mode noise from switching transients; 100ksps per channel supports IEC 61000-4-30 Class A compliance for power quality analyzers. | 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: Six-channel synchronized acquisition of motor phase currents and DC-link voltage for torque and flux estimation. Use Value: Sub-ns channel-to-channel skew preserves vector timing integrity; bipolar input range accommodates bidirectional current sensing with shunt resistors. |
| Data Acquisition Systems | Uninterruptible Power Supplies |
Use Scenario: Portable vibration analysis or condition monitoring units acquiring accelerometer, temperature, and strain gauge signals. IC Role / Device Role / Timing Role: Low-power, high-resolution ADC enabling battery-operated multi-sensor nodes with synchronized timestamping. Use Value: 5mA active current and 6µW SLEEP mode extend runtime; 32-pin QFN minimizes PCB footprint for handheld form factors. | Use Scenario: Input/output voltage and current supervision in online double-conversion UPS with automatic transfer switching. IC Role / Device Role / Timing Role: Simultaneous capture of AC input, battery, and inverter output waveforms for real-time waveform comparison and fault detection. Use Value: 76dB SINAD ensures accurate RMS and THD calculation; 3-wire serial interface simplifies isolation barrier implementation via optocouplers or digital isolators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8588SIPM | 8-channel, 16-bit, 100ksps/channel, SPI interface, 5V supply required | Higher resolution but lower sampling rate and no SLEEP mode; requires external reference and higher supply voltage | Preferred when 16-bit resolution and 8-channel count outweigh power and voltage constraints |
| AD7606C-18 | 8-channel, 18-bit, 1MSPS aggregate, parallel + SPI interface, 5V analog/3.3V digital supply | Higher speed and resolution but larger 64-lead LQFP package and 125mW active power | Selected for high-throughput industrial PLCs where board space and power budget allow |
Compared with ADS8588SIPM and AD7606C-18, the LTC1408CUH#PBF offers the lowest active and sleep power in a compact QFN, making it optimal for portable, battery-sensitive designs requiring 14-bit precision and true simultaneity-but trades off resolution and channel count for efficiency and integration.
Availability
LTC1408CUH#PBF is available at Aetrix Electronics and suitable for multiphase power measurement, motor control feedback, and portable data acquisition systems requiring stable component supply and long-term lifecycle support.
Supply support for LTC1408CUH#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1408CUH#PBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, engineered specifically for low-power, high-channel-count simultaneous sampling in space- and energy-constrained instrumentation.
FAQ
What is the operating temperature range for the LTC1408CUH#PBF?
The LTC1408CUH#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). This range is validated across all key specifications including integral linearity error (±0.5 LSB), offset error (±1 mV), and SINAD (76 dB at 100 kHz), ensuring consistent performance in indoor industrial and test equipment environments where thermal management is moderate.
How does the BIP pin affect output data format in the LTC1408CUH#PBF?
When BIP = HIGH, the LTC1408CUH#PBF configures for ±1.25V bipolar differential input and outputs data in 2's complement format; when BIP = LOW, it configures for 0V–2.5V unipolar input and outputs straight binary. The BIP state must be held constant during conversion and readout-changing it mid-sequence invalidates prior data and requires full acquisition time before next valid conversion.
Can the LTC1408CUH#PBF operate with an external reference voltage?
Yes, the LTC1408CUH#PBF accepts an external reference between 2.55V and VDD applied to the VREF pin, overriding the internal 2.5V bandgap. External referencing improves absolute accuracy and reduces tempco to ±1 ppm/°C, but requires careful decoupling (10µF + 0.1µF) and stable source impedance <1Ω to avoid settling errors affecting 14-bit linearity.
What is the minimum acquisition time required for full 14-bit accuracy in the LTC1408CUH#PBF?
The LTC1408CUH#PBF specifies 39 ns typical acquisition time (tACQ) for full 14-bit accuracy at maximum throughput. This assumes low-source-impedance driving (<100Ω); higher impedances increase tACQ linearly-e.g., 1kΩ source requires ~390 ns. Buffer amplifiers with >40MHz closed-loop bandwidth and low output impedance are recommended for high-Z sensors.
How many clock cycles are needed to read all six channels from the LTC1408CUH#PBF?
The LTC1408CUH#PBF requires exactly 96 SCK cycles to output all six 14-bit conversion results in MSB-first order (CH0 first, CH5 last). Each channel consumes 16 clocks, regardless of SELx configuration-unused channels output zero-filled or undefined data, but the full 96-cycle frame remains fixed for timing predictability in deterministic real-time systems.
LTC1408CUH#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1408CUH#PBF FAQ
1.How can I place an order for LTC1408CUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1408CUH#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 LTC1408CUH#PBF reliable?
The price and inventory of LTC1408CUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1408CUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC1408CUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1408CUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1408CUH#PBF?
LTC1408CUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1408CUH#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 LTC1408CUH#PBF?
For technical support, including LTC1408CUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1408CUH#PBF requirements.
6.How does Aetrix verify that LTC1408CUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1408CUH#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 LTC1408CUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC1408CUH#PBF?
All LTC1408CUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1408CUH#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 LTC1408CUH#PBF part is unused and in its original packaging.
Return procedure for LTC1408CUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1408CUH#PBF 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…
