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Analog Devices Inc. LTC1412CG#PBF
- Part No.:
- LTC1412CG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1412CG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,217
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Product details
Overview
LTC1412CG#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3 Msps sampling analog-to-digital converter with differential input architecture, ±2.5 V bipolar input range, 72 dB S/(N + D) at 1.5 MHz, and no pipeline delay. It integrates a precision internal 2.5 V reference, 40 MHz full-power bandwidth sample-and-hold, and parallel 12-bit CMOS output drivers compatible with 3 V or 5 V logic. It is used in high-speed data acquisition systems requiring low distortion and direct coupling to precision op amps.
For engineers reviewing the LTC1412CG#PBF datasheet, LTC1412CG#PBF pinout, LTC1412CG#PBF application, or LTC1412CG#PBF equivalent, key selection criteria include its true differential input common-mode rejection (63 dB), ±0.35 LSB INL (typ), 240 ns conversion time, 28-pin SSOP package, and compatibility with FIFOs, DSPs, and microprocessors via BUSY/CONVST control interface.
Technical Context
The LTC1412CG#PBF employs a successive approximation register (SAR) architecture with an internal differential capacitive DAC and zeroing-switched sample-and-hold. Its analog front-end supports both single-ended (AIN– grounded) and fully differential input configurations up to 40 MHz bandwidth, with 63 dB common-mode rejection maintained across 1 kHz–1 MHz.
Digital interface uses asynchronous parallel output with three-state drivers, separate OVDD supply for logic-level flexibility, and dedicated CONVST/BUSY timing signals enabling deterministic throughput of 3 Msps. Internal reference operation eliminates external component dependency, while REFCOMP pin requires 10 µF bypassing for stability and noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function and unambiguous digital representation of analog input. |
| Sample Rate | 3 Msps maximum - enables real-time digitization of signals up to 1.5 MHz Nyquist frequency without aliasing in baseband applications. |
| S/(N + D) | 72 dB at 1.465 MHz - corresponds to ~11.7 effective bits, defining usable dynamic range for spectral analysis and communication signal capture. |
| INL / DNL | ±0.35 LSB / ±0.25 LSB (typ) - ensures accurate amplitude fidelity and minimal code-dependent gain error in precision measurement systems. |
| Input Range | ±2.5 V bipolar - optimized for low-noise, low-distortion operation and direct interfacing with standard ±5 V op amps without level-shifting circuitry. |
| Power Dissipation | 150 mW at ±5 V supplies - enables high-speed conversion with thermal manageability in compact industrial and telecom modules. |
| Full-Power BW | 40 MHz - allows undersampling of RF and IF signals beyond Nyquist, supporting wideband spectrum analysis and software-defined radio front-ends. |
| Aperture Jitter | 1 ps RMS - limits sampling uncertainty-induced noise floor degradation, critical for high-SNR applications above 10 MHz input frequencies. |
Pinout & Package
Package: 28-lead plastic SSOP (G 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 relative to AIN–; sampled simultaneously with AIN–. |
| AIN– (2) | Negative analog input | Common-mode reference for differential mode; may be grounded for single-ended use; enables ground-loop rejection. |
| VREF (3) | 2.5 V reference output | Internally generated, temperature-compensated bandgap voltage; buffered via 2 kΩ series resistor for external override capability. |
| REFCOMP (4) | Reference amplifier compensation | Must be bypassed to AGND with ≥10 µF capacitor; stabilizes internal reference amplifier and suppresses noise. |
| AGND (5) | Analog ground | Primary analog return path; must be isolated from DGND/OGND except at single-point star ground to minimize noise coupling. |
| D11–D0 (6–13, 15–18) | 12-bit parallel data outputs | Three-state CMOS outputs (MSB D11 to LSB D0); driven by OVDD-supplied buffers for 3 V or 5 V logic compatibility. |
| CONVST (23) | Conversion start trigger | Active-low edge-triggered input; initiates acquisition and conversion sequence; timing-critical for deterministic throughput. |
| CS (24) | Chip select enable | Enables CONVST recognition; must be low during conversion initiation; allows multiple ADCs on shared data bus. |
| BUSY (25) | Conversion status indicator | Active-low open-drain output signaling ongoing conversion; used for handshaking with FIFOs, DSPs, or microcontrollers. |
| VSS (26) | Negative supply rail | –5 V supply connection; requires local 10 µF ceramic bypass to AGND; clamped diodes protect against overvoltage transients. |
| AVDD/DVDD/OVDD (28,27,20) | Positive supply rails | AVDD (analog), DVDD (digital logic), OVDD (output drivers); each requires dedicated 10 µF or 0.1 µF bypassing to AGND or OGND. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to 63 dB across 1 kHz–1 MHz, enabling clean signal acquisition in electrically noisy environments like motor drives or power electronics. |
| No pipeline delay | Delivers conversion result within fixed 333 ns throughput time - essential for real-time closed-loop control and time-critical trigger applications. |
| Internal 2.5 V reference with REFCOMP | Eliminates need for external reference IC; 10 µF bypass on REFCOMP ensures <15 ppm/°C tempco and <0.01 LSB/V line regulation for stable accuracy. |
| 40 MHz full-power analog input bandwidth | Supports undersampling of IF/RF signals (e.g., 70 MHz IF at 3 Msps) while maintaining >68 dB S/(N + D), extending utility beyond baseband acquisition. |
| OVDD-supplied output drivers | Allows direct interface to 3 V or 5 V logic families without level shifters - simplifies system integration and reduces BOM count in mixed-voltage designs. |
| ±0.35 LSB integral nonlinearity (typ) | Ensures <0.01% gain error across full scale, meeting requirements for calibrated test equipment, medical imaging front-ends, and precision instrumentation. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Front-End |
|---|---|
|
Use Scenario: Digitizing I/Q channels in cellular basestation receivers operating at intermediate frequencies up to 1.5 MHz. IC Role / Device Role / Timing Role: High-fidelity 12-bit sampling ADC providing synchronized dual-channel acquisition with matched gain/phase response. Use Value: 72 dB S/(N + D) and 82 dB SFDR preserve modulation accuracy for QAM-64 and higher-order schemes under multi-tone interference. |
Use Scenario: Real-time waveform capture in FPGA-based spectrum analyzers performing FFT-based signal classification. IC Role / Device Role / Timing Role: Low-latency SAR ADC feeding parallel data bus directly to FPGA fabric with deterministic BUSY handshake. Use Value: No pipeline delay and 333 ns throughput enable cycle-accurate timestamping and trigger-on-event processing for transient detection. |
| Multiplexed Data Acquisition Systems | Imaging System Digitization |
|
Use Scenario: High-channel-count industrial DAQ using multiplexer switching between sensor inputs (e.g., strain gauges, thermocouples). IC Role / Device Role / Timing Role: Precision ADC with ±2.5 V input range accepting direct op amp outputs without level translation. Use Value: ±0.35 LSB INL and ±0.25 LSB DNL ensure sub-0.01% measurement repeatability across 100+ channels in automated test equipment. |
Use Scenario: Line-scan CCD or CMOS sensor readout in medical X-ray or document scanning systems requiring 12-bit grayscale fidelity. IC Role / Device Role / Timing Role: High-speed parallel-output ADC synchronizing to pixel clock and providing burst-mode data to frame buffer memory. Use Value: 240 ns conversion time and 12-bit parallel interface support >20 klines/s scan rates with minimal dead time between pixels. |
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 |
|---|---|---|---|
| ADS8326IPW | 16-bit, 1 Msps, SPI interface, internal reference; lower speed but higher resolution and serial simplicity. | Best suited for portable instrumentation where resolution > speed and PCB space is constrained. | Select when 16-bit precision at ≤1 Msps suffices and serial interface reduces routing complexity versus parallel bus. |
| AD9220AR | 12-bit, 10 Msps, pipeline architecture, 3.3 V supply only; higher speed but introduces 10.5-cycle pipeline latency. | Applicable in video digitization or radar pulse capture where latency tolerance exists and higher throughput is mandatory. | Choose only if system can absorb pipeline delay and operate from 3.3 V; not drop-in due to timing model and supply mismatch. |
Compared with ADS8326IPW and AD9220AR, the LTC1412CG#PBF uniquely balances 3 Msps throughput, zero-latency SAR operation, ±2.5 V bipolar input, and ±5 V dual-supply flexibility-making it optimal for real-time control loops and mixed-signal test systems requiring deterministic timing and analog interface simplicity.
Availability
LTC1412CG#PBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial data acquisition, and medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1412CG#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 LTC1412CG#PBF belongs to ADI's legacy Linear Technology precision data conversion product line, designed specifically for high-speed, low-distortion sampling applications demanding DC accuracy, AC fidelity, and robust noise immunity in harsh electrical environments.
FAQ
What is the operating temperature range for the LTC1412CG#PBF?
The LTC1412CG#PBF is rated for commercial-grade operation from 0°C to 70°C. This range is defined by the "C" suffix in the part number and is validated per Absolute Maximum Ratings and Electrical Characteristics tables in the official datasheet. The device maintains full specification compliance-including ±0.35 LSB INL and 72 dB S/(N + D)-across this entire temperature span without derating. Thermal design should ensure junction temperature remains below 110°C under worst-case 150 mW dissipation.
Does the LTC1412CG#PBF require an external reference, or does it have an internal one?
The LTC1412CG#PBF includes a factory-trimmed, temperature-compensated 2.5 V internal bandgap reference accessible at the VREF pin (Pin 3). It operates without external components when used in internal-reference mode. The REFCOMP pin (Pin 4) must be bypassed with ≥10 µF to AGND for stability. External references (e.g., LT1019A-2.5) can override VREF for custom input spans, but the internal reference is fully functional and specified for all key AC/DC parameters.
Can the LTC1412CG#PBF interface directly with 3 V logic systems?
Yes-the LTC1412CG#PBF supports direct 3 V logic interfacing via its dedicated OVDD supply pin (Pin 21). When OVDD is set to 3 V, the D11–D0 parallel outputs drive valid CMOS logic levels compatible with 3 V microcontrollers, FPGAs, or ASICs. This eliminates level shifters and preserves timing integrity. The digital core (DVDD) remains at 5 V, ensuring robust internal logic operation independent of output voltage level.
What is the significance of "no pipeline delay" in the LTC1412CG#PBF?
"No pipeline delay" means the LTC1412CG#PBF is a true successive approximation register (SAR) ADC-not a pipeline ADC-so conversion results appear at the D11–D0 outputs within a fixed, deterministic 333 ns (max) after CONVST assertion. There is no latency accumulation across samples. This enables precise time-domain triggering, real-time feedback control, and synchronous multi-ADC sampling without inter-sample phase skew-critical in applications like motor control and ultrasound beamforming.
How does the differential input architecture improve noise immunity in the LTC1412CG#PBF?
The LTC1412CG#PBF's differential input architecture provides 63 dB common-mode rejection ratio (CMRR) up to 1 MHz, actively rejecting noise coupled equally onto AIN+ and AIN– (e.g., ground loops, EMI, or supply ripple). By measuring only the voltage difference AIN+ – AIN–, it cancels interference that would corrupt single-ended measurements. This allows direct sensor interfacing in noisy industrial settings and improves effective SNR without additional filtering-verified in Typical Performance Characteristics Figure G09.
LTC1412CG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1412CG#PBF FAQ
1.How can I place an order for LTC1412CG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1412CG#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 LTC1412CG#PBF reliable?
The price and inventory of LTC1412CG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1412CG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1412CG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1412CG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1412CG#PBF?
LTC1412CG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1412CG#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 LTC1412CG#PBF?
For technical support, including LTC1412CG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1412CG#PBF requirements.
6.How does Aetrix verify that LTC1412CG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1412CG#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 LTC1412CG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1412CG#PBF?
All LTC1412CG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1412CG#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 LTC1412CG#PBF part is unused and in its original packaging.
Return procedure for LTC1412CG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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