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Analog Devices Inc. LTC1402CGN#PBF
- Part No.:
- LTC1402CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1402CGN#PBF.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
LTC1402CGN#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 2.2 Msps serial sampling ADC with true differential inputs, internal 4.096 V reference, and dual ±5 V or single 5 V supply operation. It delivers 72 dB S/(N+D), –89 dB THD at Nyquist, 80 MHz full-power bandwidth, and supports unipolar (0 V to 4.096 V) or bipolar (±2.048 V) input ranges - used in high-speed data acquisition, spectrum analysis, and portable instrumentation.
For engineers reviewing the LTC1402CGN#PBF datasheet, LTC1402CGN#PBF pinout, LTC1402CGN#PBF application, or LTC1402CGN#PBF equivalent, key selection criteria include its Nap/Sleep power modes (15 mW / 10 µW), 3-wire SPI/MICROWIRE-compatible interface, differential common-mode rejection, and guaranteed no missing codes over temperature.
Technical Context
The LTC1402CGN#PBF employs a successive-approximation register (SAR) architecture with a high-bandwidth sample-and-hold front-end. Its differential input stage supports simultaneous sampling of AIN+ and AIN– with 62 dB CMRR at 1 MHz and maintains linearity across common-mode voltages from –2.5 V to 5 V under dual or single-supply conditions.
Timing is controlled via external CONV and SCK signals; conversion completes in 14 SCK cycles, with minimum throughput period of 455 ns. The internal reference settles in 2 ms after wake-up from Sleep mode, and the REFRDY bit in the DOUT word signals readiness for valid conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes over 0°C to 70°C |
| Sampling Rate | 2.2 Msps maximum - enables real-time digitization of signals up to 1.1 MHz (Nyquist) |
| S/(N + D) | 72 dB at 100 kHz input - defines usable dynamic range for medium-frequency signal capture |
| THD | –89 dB at Nyquist (1.1 MHz) in bipolar mode - critical for low-distortion RF/IF sampling |
| Power Dissipation | 90 mW typical in active mode; 15 mW in Nap mode; 10 µW in Sleep mode - supports battery-constrained systems |
| Input Range | Selectable via BIP/UNI pin: ±2.048 V (bipolar) or 0 V to 4.096 V (unipolar) - matches standard op-amp output swings |
| Reference | Internal 4.096 V bandgap reference (15 ppm/°C tempco); overdrivable externally - enables precision scaling or external reference substitution |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN), 0.15 mm pitch, 5.0 mm × 6.2 mm footprint, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD (1) | Analog power supply | +5 V analog rail; requires local 10 µF ceramic bypass to AGND1 |
| AGND1 (2), AGND2 (6), DGND (13), OGND (9) | Analog/digital ground returns | AGND1/AGND2 serve analog sections; DGND for digital logic; OGND isolates output driver - must be tied to solid analog ground plane |
| AIN+ (3), AIN– (4) | Differential analog inputs | Sample simultaneously; accept ±2.048 V (bipolar) or 0–4.096 V (unipolar); reject common-mode noise up to 62 dB @ 1 MHz |
| VREF (5) | Reference voltage output | 4.096 V internal reference; can be overdriven externally or buffered for improved stability |
| GAIN (7) | Reference scaling control | Tie to AGND2 for 4.096 V; tie to VREF for 2.048 V full-scale - sets LSB = 1 mV or 0.5 mV respectively |
| BIP/UNI (8) | Input range mode select | Logic high = bipolar (±2.048 V); logic low = unipolar (0–4.096 V) - configures transfer function and offset |
| DOUT (10) | 3-state serial data output | Outputs 12-bit conversion result plus REFRDY bit; level-shifted by OVDD for direct 3 V/5 V logic interfacing |
| OVDD (11) | Output driver supply | Set to 3 V or 5 V to match host logic voltage - eliminates external level shifters |
| CONV (16) | Conversion trigger | Rising edge initiates sampling and conversion; two pulses enter Nap mode; four pulses enter Sleep mode |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Enables rejection of ground loops and common-mode interference without external instrumentation amps |
| Programmable power modes | Nap mode (15 mW, instant wake-up) and Sleep mode (10 µW, 10 ms reference settle) reduce system-level power budget |
| Flexible reference configuration | Internal 4.096 V reference with 15 ppm/°C tempco; externally overdrivable to support precision calibration or alternative references |
| 3-wire serial interface | SPI/MICROWIRE-compatible timing with CONV/SCK/DOUT - minimizes PCB routing and supports daisy-chaining |
| Guaranteed monotonicity | No missing codes across full temperature range (0°C to 70°C) - essential for closed-loop control and metrology |
Applications
| High-Speed Data Acquisition | Digital Radio Receivers |
|---|---|
|
Use Scenario: Digitizing IF signals in software-defined radio front-ends with >1 MHz instantaneous bandwidth. IC Role / Device Role / Timing Role: High-fidelity SAR ADC capturing baseband or IF samples at 2.2 Msps with minimal harmonic distortion. Use Value: –89 dB THD and –93 dB SFDR at 1.1 MHz enable clean demodulation of QAM/OFDM waveforms without aliasing-induced intermodulation. |
Use Scenario: Sampling intermediate frequency outputs from quadrature downconverters in portable SDR platforms. IC Role / Device Role / Timing Role: Differential-input ADC rejecting LO feedthrough and supply noise in compact RF subsystems. Use Value: 62 dB CMRR at 1 MHz and bipolar ±2.048 V range allow direct connection to low-noise amplifiers without level-shifting circuitry. |
| Spectrum Analysis Equipment | Handheld Test Instruments |
|
Use Scenario: Real-time FFT-based spectral monitoring in field-deployable analyzers requiring >80 dB dynamic range. IC Role / Device Role / Timing Role: Precision ADC providing calibrated amplitude accuracy and repeatable ENOB across temperature. Use Value: 72 dB S/(N+D) and <±1 LSB integral linearity ensure accurate power measurement of harmonics and spurs up to Nyquist. |
Use Scenario: Battery-powered oscilloscope modules or portable logic analyzers needing low standby power and fast wake-up. IC Role / Device Role / Timing Role: Low-power sampling ADC enabling >10-hour operation on coin-cell batteries via Sleep/Nap modes. Use Value: 10 µW Sleep current and 10 ms reference settle time allow rapid resumption of measurements without calibration delay. |
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 |
|---|---|---|---|
| AD7892BRZ-1 | 12-bit, 1.5 Msps, single-supply only (5 V), no internal reference, requires external REF | Lacks differential input and programmable bipolar/unipolar range; suited for simpler unipolar sensor interfaces | Choose when board space permits external reference and differential rejection is not required |
| MAX1190ECM+ | 12-bit, 2.5 Msps, internal reference (2.048 V), SPI-only interface, no Nap/Sleep modes | Higher speed but fixed 2.048 V reference and no ultra-low-power states - less flexible for portable use | Prefer when maximum throughput is critical and power budget allows continuous 120 mW operation |
Compared with LTC1402CGN#PBF, AD7892BRZ-1 trades differential capability and internal reference for lower cost and simpler layout, while MAX1190ECM+ offers higher speed but sacrifices power efficiency and input flexibility - making LTC1402CGN#PBF optimal for portable, precision, mixed-supply systems.
Availability
LTC1402CGN#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, spectrum analysis, and handheld test instrumentation requiring stable component supply and long-term industrial availability.
Supply support for LTC1402CGN#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs for precision and high-speed applications.
The LTC1402CGN#PBF belongs to Linear's legacy high-speed precision ADC family, designed specifically for demanding applications where dynamic performance, low power, and flexible input configuration coexist - including portable instrumentation and communications infrastructure.
FAQ
What is the operating temperature range for the LTC1402CGN#PBF?
The LTC1402CGN#PBF is rated for 0°C to 70°C (Commercial grade). This is confirmed by the "C" suffix in the part number and specified in the Absolute Maximum Ratings table. All DC and AC performance parameters - including INL, DNL, S/(N+D), and THD - are guaranteed across this full range, with no missing codes.
Does the LTC1402CGN#PBF support both single-ended and differential input configurations?
Yes, the LTC1402CGN#PBF supports true differential input (AIN+ and AIN–) with common-mode rejection, but it also functions in single-ended mode: grounding AIN– and applying signal to AIN+ achieves unipolar or bipolar operation depending on the BIP/UNI pin state. The datasheet confirms identical linearity and noise performance in both configurations.
How does the REFRDY bit function in the LTC1402CGN#PBF serial output word?
The REFRDY bit appears as the MSB (bit 12) in each 13-bit DOUT word. It asserts high after the internal reference has settled - 10 ms after wake-up from Sleep mode, or immediately in active/Nap modes. This provides deterministic timing for host processors to validate conversion validity without external polling or delay timers.
Can the LTC1402CGN#PBF operate from a single 5 V supply while using the ±2.048 V bipolar input range?
Yes - the LTC1402CGN#PBF supports bipolar input operation with a single 5 V supply (VDD = 5 V, VSS = 0 V), provided the absolute voltages at AIN+ and AIN– remain within 0 V to 5 V. This is explicitly validated in the Electrical Characteristics table under "Analog Common Mode + Differential Input Range" for single 5 V supply.
What is the minimum acquisition time for the LTC1402CGN#PBF, and how does source impedance affect it?
The LTC1402CGN#PBF has a typical acquisition time of 57 ns with low source impedance (<100 Ω). As source resistance increases, acquisition time rises - e.g., ~1.3 µs at 100 kΩ - per Figure 1 in the datasheet. For high-impedance sources, an op-amp buffer (e.g., LT1227 or LT1632) is recommended to maintain full 2.2 Msps throughput.
LTC1402CGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 2.2M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- 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, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1402CGN#PBF FAQ
1.How can I place an order for LTC1402CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1402CGN#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 LTC1402CGN#PBF reliable?
The price and inventory of LTC1402CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1402CGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1402CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1402CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1402CGN#PBF?
LTC1402CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1402CGN#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 LTC1402CGN#PBF?
For technical support, including LTC1402CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1402CGN#PBF requirements.
6.How does Aetrix verify that LTC1402CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1402CGN#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 LTC1402CGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1402CGN#PBF?
All LTC1402CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1402CGN#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 LTC1402CGN#PBF part is unused and in its original packaging.
Return procedure for LTC1402CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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