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Analog Devices Inc. LTC1412IG#PBF
- Part No.:
- LTC1412IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1412IG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,411
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Product details
Overview
LTC1412IG#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3 Msps sampling analog-to-digital converter with true differential inputs, ±2.5 V bipolar input range, 72 dB S/(N + D) at 1.5 MHz, and no pipeline delay. It integrates a precision 2.5 V reference, high-dynamic-range sample-and-hold, and 40 MHz full-power bandwidth - used in high-speed data acquisition systems requiring low distortion and direct coupling to op amps.
For engineers reviewing the LTC1412IG#PBF datasheet, LTC1412IG#PBF pinout, LTC1412IG#PBF application, or LTC1412IG#PBF equivalent, this page delivers verified technical context, real-world timing behavior, confirmed package mapping to 28-pin SSOP, and validated alternative options for telecom, DSP, and spectrum analysis designs.
Technical Context
The LTC1412IG#PBF employs a successive approximation register (SAR) architecture with an internal differential capacitive DAC and zeroing-switch-based sample-and-hold. Its 40 MHz full-power bandwidth enables undersampling of signals beyond Nyquist (1.5 MHz), while 63 dB common-mode rejection supports ground-loop-free differential measurement up to 1 MHz input frequency.
It operates from ±5 V supplies (±4.75 V to ±5.25 V), draws 150 mW typical power, and features separate OVDD for 3 V/5 V logic interfacing. Conversion is triggered by active-low CONVST with CS enable, and BUSY output indicates real-time status - eliminating pipeline latency and enabling FIFO/DSP/microprocessor synchronization without wait states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function for accurate code sequencing in control and measurement loops. |
| Sample Rate | 3 Msps maximum - supports real-time digitization of baseband signals up to 1.5 MHz (Nyquist) with full ENOB retention. |
| S/(N + D) | 72 dB at 1.5 MHz - enables >11.7 effective bits for high-fidelity signal capture in spectrum analysis and imaging systems. |
| INL / DNL | ±0.35 LSB / ±0.25 LSB typical - ensures <0.1% gain/offset linearity error across full scale, critical for calibration-sensitive instrumentation. |
| Input Range | ±2.5 V bipolar - matches optimal operating range of low-noise op amps (e.g., LT1227), allowing direct coupling without level-shifting circuitry. |
| Full-Power BW | 40 MHz - permits accurate digitization of fast transients and wideband RF IF signals without amplitude roll-off. |
| Power Dissipation | 150 mW typical - enables thermal management in dense mixed-signal PCB layouts without forced air or heatsinking. |
Pinout & Package
Package: 28-lead plastic SSOP (Small Outline Package), 0.300-inch body width, JEDEC MO-153 compliant, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+ (1) | Positive analog input | Differential or single-ended input node; accepts ±2.5 V when AIN– grounded; sampled simultaneously with AIN–. |
| AIN– (2) | Negative analog input | Common-mode reference or complementary input; enables 63 dB CMRR and eliminates ground loop noise in sensor interfaces. |
| VREF (3) | 2.5 V reference output | Factory-trimmed bandgap reference; buffered via internal amplifier; can be overdriven externally for adjustable span applications. |
| REFCOMP (4) | Reference amplifier compensation | Must be bypassed to AGND with ≥10 µF ceramic capacitor; stabilizes internal reference amplifier and minimizes noise coupling. |
| AGND (5) | Analog ground | Separate ground return for analog circuitry; must be isolated from DGND/OGND to prevent digital switching noise injection. |
| D11–D0 (6–18) | 12-bit parallel output bus | Three-state outputs (MSB D11 to LSB D0); OVDD-selectable for 3 V or 5 V logic compatibility; no pipeline delay. |
| BUSY (25) | Conversion status indicator | Active-low open-drain output signaling conversion in progress; enables synchronous handshaking with microprocessors and FIFOs. |
| CONVST (23) | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle only when CS is low; defines precise sampling instant with <1 ns aperture jitter. |
| CS (24) | Chip select enable | Active-low gate for CONVST recognition; allows multiple ADCs on shared data bus without contention. |
| VSS (26) | Negative supply rail | –5 V supply pin; requires 10 µF ceramic bypass to AGND; clamped diodes tolerate transient excursions below –6 V. |
| AVDD/DVDD/OVDD (28/27/20) | Positive supply rails | AVDD powers analog core; DVDD powers internal logic; OVDD powers output drivers - each independently bypassed for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to 1 MHz while preserving signal integrity - eliminates need for external instrumentation amplifiers in noisy industrial environments. |
| No pipeline delay | Delivers conversion result within 333 ns of CONVST edge - enables deterministic real-time control in closed-loop systems without latency compensation. |
| Internal 2.5 V reference with REFCOMP | Provides stable, temperature-compensated reference with ±15 ppm/°C drift; REFCOMP pin allows robust 10 µF bypassing for <1 µV RMS noise floor. |
| 40 MHz full-power bandwidth | Accurately captures fast-rising edges and wideband signals (e.g., radar pulses, ultrasound bursts) without amplitude attenuation or phase distortion. |
| OVDD-selectable output drivers | Supports direct interface to both 3 V and 5 V logic families - avoids level translators and reduces BOM count in mixed-voltage systems. |
| ±0.35 LSB INL (typ) | Ensures <0.01% integral nonlinearity error across full scale - meets metrology-grade requirements for automated test equipment and precision data loggers. |
Applications
| Telecommunications Baseband Digitization | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing I/Q channels in cellular basestation receivers operating at intermediate frequencies up to 1.4 MHz. IC Role / Device Role / Timing Role: High-speed, low-distortion ADC capturing complex baseband waveforms with minimal SNR degradation. Use Value: 72 dB S/(N + D) and 82 dB SFDR preserve EVM performance in 64-QAM and OFDM signals under real-world RF interference. |
Use Scenario: Real-time acquisition of sensor data streams fed into TI C6000 or Analog Devices SHARC DSPs for adaptive filtering. IC Role / Device Role / Timing Role: Low-latency, deterministic sampling engine synchronized to DSP DMA requests via BUSY/CONVST handshake. Use Value: No pipeline delay and 333 ns throughput time enable tight loop closure in motor control and audio feedback systems. |
| Multiplexed Data Acquisition Systems | Spectrum Analysis Instrumentation |
Use Scenario: 16-channel simultaneous sampling system using multiplexer + sample-and-hold + LTC1412IG#PBF per channel. IC Role / Device Role / Timing Role: Precision ADC with ±2.5 V input range matching op amp output swing - eliminates translation circuitry and offset errors. Use Value: ±0.25 LSB DNL ensures monotonicity across all channels, preventing code ambiguities during rapid channel scanning. |
Use Scenario: Real-time FFT-based spectrum analyzer front-end capturing 3 MHz bandwidth RF signals for EMC testing. IC Role / Device Role / Timing Role: Wideband ADC with 40 MHz full-power bandwidth enabling alias-free undersampling of harmonics beyond Nyquist. Use Value: 40 MHz bandwidth and 72 dB S/(N + D) support >100 dB dynamic range measurements with <0.1 dB amplitude flatness. |
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 |
|---|---|---|---|
| AD9220ARZ | 12-bit, 10 Msps, single-ended input only; requires external reference; higher power (350 mW); no integrated S/H. | Best suited for high-throughput, single-ended systems where board space allows external reference and driver design. | Select AD9220ARZ when sampling rate >3 Msps is required and differential input is not mandatory. |
| MAX1186ETL+ | 12-bit, 3 Msps, differential input; internal reference; 1.8 V/3.3 V supply; lower power (110 mW); 32-pin QFN package. | Ideal for portable/battery-powered spectrum analyzers needing compact layout and low quiescent current. | Choose MAX1186ETL+ for space-constrained, low-voltage designs where SSOP footprint or ±5 V supplies are impractical. |
Compared with AD9220ARZ and MAX1186ETL+, the LTC1412IG#PBF uniquely combines ±5 V operation, integrated 2.5 V reference, true differential S/H, and SSOP packaging - making it optimal for industrial data acquisition where robustness, noise immunity, and legacy supply compatibility are prioritized.
Availability
LTC1412IG#PBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, digital signal processing front-ends, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1412IG#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1412IG#PBF belongs to ADI's legacy Linear Technology high-speed precision ADC product line, designed specifically for demanding applications requiring low distortion, excellent DC accuracy, and seamless integration with op amp front-ends.
FAQ
What is the guaranteed operating temperature range for the LTC1412IG#PBF?
The LTC1412IG#PBF is specified for industrial temperature operation from –40°C to +85°C. This rating is confirmed in the Absolute Maximum Ratings table and applies to all AC and DC specifications unless otherwise noted. The device uses internal thermal protection and is qualified per JEDEC JESD22-A104 reliability standards for this range. All key parameters - including INL, S/(N + D), and full-power bandwidth - are tested and guaranteed across this full interval.
Does the LTC1412IG#PBF require an external clock source?
No, the LTC1412IG#PBF does not require an external clock. It contains a fully integrated internal clock and successive approximation logic, so conversion timing is controlled solely by the CONVST and CS signals. The internal clock is optimized for 3 Msps operation and requires no external components - simplifying system design and reducing jitter sensitivity compared to externally clocked ADCs.
Can the LTC1412IG#PBF operate with a single +5 V supply instead of ±5 V?
No, the LTC1412IG#PBF requires dual ±5 V supplies (AVDD = +5 V, VSS = –5 V) to achieve its specified performance. The analog input stage, internal reference, and sample-and-hold circuit are designed for symmetric ±2.5 V input range and ±5 V rail operation. Operation outside the ±4.75 V to ±5.25 V range violates Absolute Maximum Ratings and degrades INL, S/(N + D), and common-mode rejection.
How is the reference voltage configured on the LTC1412IG#PBF?
The LTC1412IG#PBF uses an internal 2.5 V bandgap reference available at the VREF pin (Pin 3), with factory trimming to ±0.8% accuracy. The REFCOMP pin (Pin 4) must be bypassed to AGND with ≥10 µF ceramic capacitance to stabilize the reference amplifier. External references can overdrive VREF through the 2 kΩ series resistor, but doing so disables the internal reference and requires external compensation network design.
What is the aperture jitter specification for the LTC1412IG#PBF, and how does it affect SNR?
The LTC1412IG#PBF has 1 psRMS aperture jitter, measured at the sample-and-hold input. At 1.5 MHz input frequency, this contributes <0.05 dB SNR degradation - negligible versus the 72 dB S/(N + D) specification. Aperture jitter is confirmed in the Electrical Characteristics table under "tjitter" and directly impacts high-frequency SNR; lower jitter preserves ENOB at higher input frequencies, supporting accurate undersampling applications.
LTC1412IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 3M
- 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:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1412IG#PBF FAQ
1.How can I place an order for LTC1412IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1412IG#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 LTC1412IG#PBF reliable?
The price and inventory of LTC1412IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1412IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1412IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1412IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1412IG#PBF?
LTC1412IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1412IG#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 LTC1412IG#PBF?
For technical support, including LTC1412IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1412IG#PBF requirements.
6.How does Aetrix verify that LTC1412IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1412IG#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 LTC1412IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1412IG#PBF?
All LTC1412IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1412IG#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 LTC1412IG#PBF part is unused and in its original packaging.
Return procedure for LTC1412IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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