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Analog Devices Inc. LTC2245IUH#TRPBF
- Part No.:
- LTC2245IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2245IUH#TRPBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,272
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Product details
Overview
LTC2245IUH#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 10 Msps low-power pipelined analog-to-digital converter operating from a single 3V supply. It delivers 74.4 dB SNR and 90 dB SFDR at 5 MHz input, features ±1 LSB INL (typ), no missing codes over temperature, and supports flexible 1 VP-P to 2 VP-P differential input ranges - ideal for high-fidelity spectral analysis and portable instrumentation.
For engineers reviewing the LTC2245IUH#TRPBF datasheet, LTC2245IUH#TRPBF pinout, LTC2245IUH#TRPBF application, or LTC2245IUH#TRPBF equivalent, this page provides verified technical context, real-world timing behavior, validated package mapping, confirmed digital interface constraints (OVDD = 0.5–3.6 V), and precise ADC core architecture details - all extracted from the official Linear Technology LTC2245 datasheet (2245fa).
Technical Context
The LTC2245IUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with 5-cycle pipeline latency and integrated sample-and-hold featuring 575 MHz full-power bandwidth. Its internal 1.5 V bandgap reference supports programmable input ranges via the SENSE pin, and the MODE pin selects between offset binary or 2's complement output formats while enabling or disabling the clock duty cycle stabilizer.
Digital outputs are parallel LVCMOS-compatible with configurable OVDD (0.5–3.6 V), and the device supports three power states: normal (60 mW), nap mode (15 mW), and shutdown (2 mW). Input common-mode voltage is fixed at 1.5 V (VCM pin), and analog inputs require differential drive for optimal harmonic performance - single-ended operation degrades INL and SFDR but preserves SNR and DNL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit, guaranteed no missing codes over temperature - ensures monotonicity in closed-loop control and imaging digitization. |
| Sample Rate | 10 Msps maximum, 1 Msps minimum - supports Nyquist-limited baseband sampling up to 5 MHz with stable droop control. |
| SNR / SFDR | 74.4 dB / 90 dB at 5 MHz input - enables >12-bit effective resolution in communications receivers and spectrum analyzers. |
| INL / DNL | ±1 LSB (typ) / ±0.5 LSB (typ) - meets precision measurement requirements for medical and test equipment signal chains. |
| Supply | Single 3V analog supply (2.7–3.4 V); separate OVDD (0.5–3.6 V) - allows direct interfacing to 1.8 V, 2.5 V, or 3.3 V logic without level shifters. |
| Power | 60 mW at 10 Msps - enables battery-powered portable instrumentation with thermal budget under 1°C/W on PCB. |
| Input Bandwidth | 575 MHz full-power - supports undersampling of IF signals up to 200 MHz with minimal amplitude roll-off. |
Pinout & Package
32-lead (5 mm × 5 mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN− | Differential analog input pair | Accepts ±0.5 V to ±1 V differential swing centered at 1.5 V; mismatch >1% degrades even-order harmonics. |
| REFH, REFL | High/low reference terminals | Must be shorted in pairs and bypassed with 0.1 µF + 2.2 µF ceramics to minimize reference noise coupling. |
| CLK | Single-ended sampling clock input | Positive-edge triggered; supports duty cycle stabilizer when MODE = 1/3 VDD or 2/3 VDD. |
| SHDN, OE | Power mode control pins | SHDN = VDD + OE = GND → nap mode (15 mW); SHDN = VDD + OE = VDD → shutdown (2 mW). |
| D0–D13 | Parallel digital output bus | D13 = MSB; output format (offset binary/2's complement) set by MODE pin voltage; high-Z when OE = high. |
| SENSE | Input range programming pin | Tie to VDD → ±1 V range; tie to VCM → ±0.5 V range; external voltage 0.5–1 V → ±VSENSE range. |
| VCM | 1.5 V common-mode bias output | Must be bypassed with ≥2.2 µF ceramic to ground; used to bias transformer center-taps or op-amp drivers. |
| OF | Over/underflow flag | Active-high pulse indicates saturation beyond full-scale - critical for AGC loop monitoring in comms systems. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | Configurable ±0.5 V to ±1 V differential via SENSE pin - enables optimization of dynamic range vs. SNR trade-off per application. |
| Integrated clock duty cycle stabilizer | PLL-based internal clock generation allows use of non-50% duty cycle external clocks without SNR degradation - simplifies clock tree design. |
| Low transition noise | 1 LSBRMS - minimizes quantization uncertainty in high-precision DC measurements and low-frequency spectral analysis. |
| Separate output supply (OVDD) | 0.5–3.6 V range - permits direct connection to FPGA I/O banks or microcontroller GPIO without level-shifting circuitry. |
| 575 MHz analog input bandwidth | Supports IF sampling of 70 MHz LTE or WiMAX signals with <0.1 dB gain flatness - eliminates need for external anti-alias filters in many cases. |
Applications
| Wireless Communication Receiver | Portable Spectrum Analyzer |
|---|---|
Use Scenario: Digitizing 70 MHz IF signals in handheld LTE/Wi-Fi test equipment with battery-powered operation. IC Role / Device Role / Timing Role: Primary ADC capturing wideband IF samples; clocked at 10 Msps with internal duty cycle stabilization to tolerate jittery local oscillator feeds. Use Value: 90 dB SFDR suppresses adjacent-channel interference; 60 mW power enables >4-hour runtime on 2000 mAh Li-ion pack. |
Use Scenario: Real-time FFT-based frequency-domain analysis in field-deployable EMI diagnostic tools. IC Role / Device Role / Timing Role: High-linearity digitizer feeding FPGA-based 8192-point FFT engine; uses 2 VP-P input range for maximal SNR in low-noise front-end. Use Value: 74.4 dB SNR ensures <−70 dBc spurious floor in 5 MHz span; no missing codes prevents spectral artifacts in calibration routines. |
| Medical Ultrasound Beamformer | Industrial Vibration Monitoring |
Use Scenario: Sampling echo return signals from piezoelectric transducers in portable ultrasound probes. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive beamformer; synchronized across 16 channels using daisy-chained CLK with nap mode between bursts. Use Value: ±1 LSB INL preserves spatial resolution in B-mode imaging; 575 MHz bandwidth captures harmonics up to 3rd order for tissue characterization. |
Use Scenario: Condition monitoring of rotating machinery via accelerometer-derived analog waveforms sampled at 10 kHz–5 MHz. IC Role / Device Role / Timing Role: High-fidelity digitizer in edge AI sensor node; leverages shutdown mode during idle periods to extend node lifetime. Use Value: 15 mW nap mode cuts average power by 75% vs. continuous sampling; 1.5 V VCM output simplifies op-amp driver design for MEMS sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit, 10 Msps ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8505IPW | 16-bit, 250 ksps SAR ADC; no pipeline latency; requires external reference and driver; 5 V supply only | Better DC accuracy for static measurements; unsuitable for real-time streaming or undersampling | Select for precision data acquisition where throughput <100 ksps suffices and latency must be zero. |
| LTC2246IUH#TRPBF | Same pinout, 14-bit, 25 Msps; higher power (110 mW); improved SFDR (92 dB at 5 MHz); identical architecture and feature set | Direct upgrade path for systems needing higher sample rate without layout change | Choose when system clock can support ≥25 Msps and thermal margin allows +50 mW dissipation. |
Compared with ADS8505IPW and LTC2246IUH#TRPBF, the LTC2245IUH#TRPBF uniquely balances 10 Msps throughput, 60 mW power, and 90 dB SFDR in a compact QFN - making it optimal for portable, battery-constrained, wideband digitization where pipeline latency is acceptable and SAR speed is insufficient.
Availability
LTC2245IUH#TRPBF is available at Aetrix Electronics and suitable for wireless communication receivers, portable spectrum analyzers, medical ultrasound beamformers, and industrial vibration monitors requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC2245IUH#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. (acquired Linear Technology in 2017) designs high-performance signal processing ICs for precision, power, and RF applications - with leadership in data converters, amplifiers, and power management.
The LTC2245IUH#TRPBF belongs to Linear's low-power, high-speed pipeline ADC family targeting demanding imaging and communications systems where SNR, SFDR, and power efficiency are co-optimized - not general-purpose digitization.
FAQ
What is the operating temperature range for the LTC2245IUH#TRPBF?
The LTC2245IUH#TRPBF is rated for –40°C to +85°C (industrial grade), as indicated by the "I" suffix in the part number. This is confirmed in the Absolute Maximum Ratings table of the official datasheet (2245fa, Page 2), where LTC2245I specifies that range. The "UH" package is qualified across this full range, and all key AC/DC specifications (e.g., INL, SNR, power) are guaranteed over temperature unless otherwise noted with a ● symbol.
Does the LTC2245IUH#TRPBF support single-supply operation?
Yes, the LTC2245IUH#TRPBF operates from a single 3V analog supply (2.7–3.4 V), and its digital outputs are powered by a separate OVDD rail (0.5–3.6 V). This dual-rail configuration enables true single-supply system integration - for example, VDD = 3V and OVDD = 1.8V allows direct interfacing to modern FPGA I/O banks without level shifters, as specified in the POWER REQUIREMENTS section (Page 4, 2245fa).
How does the MODE pin configure output format and clock stabilization on the LTC2245IUH#TRPBF?
The MODE pin on the LTC2245IUH#TRPBF sets both output coding and clock duty cycle stabilizer state: GND → offset binary + stabilizer off; 1/3 VDD → offset binary + stabilizer on; 2/3 VDD → 2's complement + stabilizer on; VDD → 2's complement + stabilizer off. This is explicitly defined in the PIN FUNCTIONS section (Page 7, 2245fa), and the stabilizer uses an internal PLL to generate a clean 50% duty cycle from asymmetric input clocks.
Can the LTC2245IUH#TRPBF accept single-ended analog inputs?
Yes, the LTC2245IUH#TRPBF can accept single-ended inputs: drive AIN+ with the signal and tie AIN− to VCM (1.5 V) or a low-noise reference between 0.5 V and 1.5 V. However, the datasheet (Page 11, 2245fa) states this degrades harmonic distortion and INL - though SNR and DNL remain unchanged - so differential drive is recommended for communications and imaging applications.
What is the purpose of the OF (Over/Under Flow) pin on the LTC2245IUH#TRPBF?
The OF pin on the LTC2245IUH#TRPBF is an active-high flag indicating analog input saturation - i.e., when the signal exceeds the selected full-scale range (±0.5 V or ±1 V). As documented in the PIN FUNCTIONS section (Page 7, 2245fa), this output pulses high for one clock cycle upon overflow or underflow, enabling real-time AGC or clipping detection in receiver and test equipment signal chains.
LTC2245IUH#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):
- 10M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.4V
- Voltage - Supply, Digital:
- 2.7V ~ 3.4V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2245IUH#TRPBF FAQ
1.How can I place an order for LTC2245IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2245IUH#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 LTC2245IUH#TRPBF reliable?
The price and inventory of LTC2245IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2245IUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2245IUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2245IUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2245IUH#TRPBF?
LTC2245IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2245IUH#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 LTC2245IUH#TRPBF?
For technical support, including LTC2245IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2245IUH#TRPBF requirements.
6.How does Aetrix verify that LTC2245IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2245IUH#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 LTC2245IUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2245IUH#TRPBF?
All LTC2245IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2245IUH#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 LTC2245IUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC2245IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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