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Analog Devices Inc. LTC1420CGN#TRPBF
- Part No.:
- LTC1420CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1420CGN#TRPBF.pdf
- Description:
- IC ADC 12BIT PIPELINED 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,902
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Product details
Overview
LTC1420CGN#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 10 Msps sampling analog-to-digital converter with integrated sample-and-hold, programmable gain amplifier (PGA), and precision internal reference. It operates from single 5V or dual ±5V supplies, delivers 71 dB S/(N+D) and 83 dB SFDR at 5 MHz input, and supports ±2.048 V, ±1.024 V, and ±0.512 V bipolar input ranges - ideal for high-speed spectral analysis and telecommunications data acquisition.
For engineers reviewing the LTC1420CGN#TRPBF datasheet, LTC1420CGN#TRPBF pinout, LTC1420CGN#TRPBF application, or LTC1420CGN#TRPBF equivalent, key selection considerations include its 100 MHz full-power bandwidth, differential input architecture with 75 dB CMRR, flexible 1×/2× PGA gain control, out-of-range indicator (OF), and separate OVDD logic supply enabling direct interfacing with 3V digital systems.
Technical Context
The LTC1420CGN#TRPBF employs a pipelined 12-bit CMOS ADC architecture with on-chip differential sample-and-hold, achieving 70–90 ns conversion time and 10–30 ns acquisition time. Its input stage supports true differential or single-ended signals with arbitrary common-mode voltage, enabled by a dedicated VCM (2.5 V) output and programmable SENSE/VREF configuration.
Dynamic performance is stabilized by internal dynamic logic refresh (no power surge during clock stop), while DC accuracy is maintained via factory-trimmed bandgap reference (±15 ppm/°C tempco) and guaranteed ±0.35 LSB INL over temperature. The device requires no external clock conditioning for 10 Msps operation but benefits from <5 ns CLK rise time to minimize jitter-induced SNR degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes; enables 4096 discrete amplitude levels for precise signal digitization. |
| Sample Rate | 10 Msps maximum; supports real-time capture of signals up to 5 MHz Nyquist frequency. |
| S/(N + D) | 71 dB typical at 5 MHz input; ensures >11.8 effective bits for demanding signal integrity applications. |
| SFDR | 83 dB typical at 5 MHz input; suppresses spurious content critical in spectral analysis and comms receivers. |
| Input Range | Selectable ±2.048 V / ±1.024 V / ±0.512 V via GAIN and SENSE pins; matches varying sensor or signal chain output levels. |
| Power Dissipation | 250 mW typical at 10 Msps; low thermal load enables dense PCB layouts without forced cooling. |
| Full-Power Bandwidth | 100 MHz; preserves fidelity of fast transients and wideband RF/IF signals before digitization. |
Pinout & Package
The LTC1420CGN#TRPBF is housed in a 28-lead narrow SSOP (GN) package with exposed pad for thermal enhancement. Pin spacing is 0.65 mm, body width 5.6 mm, and total footprint 10.2 × 5.6 mm - compatible with standard surface-mount assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (1) | Differential analog input positive | Accepts high-impedance signal source; sampled simultaneously with –AIN for true differential acquisition. |
| –AIN (2) | Differential analog input negative | Enables common-mode noise rejection; supports arbitrary common-mode voltage (e.g., 2.5 V in single-supply mode). |
| VCM (3) | 2.5 V reference output | Provides stable bias for single-supply –AIN connection; low-impedance (8 Ω) output supports direct driving of external circuitry. |
| SENSE (4) | Reference programming control | GND → VREF = 4.096 V; short to VREF → VREF = 2.048 V; connect to VDD → enable external VREF drive. |
| VREF (5) | ADC reference voltage input | Sets core input span to ±VREF/2; bypassed with ≥1 µF ceramic capacitor for noise immunity. |
| GND (6, 8, 24) | Analog ground terminals | Three dedicated AGND pins minimize ground bounce; must be tied to low-impedance analog ground plane. |
| VDD (7, 23) | +5 V analog supply | Dual VDD pins reduce supply impedance; each requires ≥1 µF ceramic decoupling to GND. |
| VSS (25) | Negative supply (–5 V or 0 V) | Configures single/dual supply operation; bypass to GND with 1 µF ceramic if not grounded. |
| CLK (26) | Conversion start clock | Rising-edge triggered; supports 0.02–10 MHz rates; <5 ns rise time recommended for optimal AC performance. |
| OF (27) | Overflow flag output | Active-high signal indicates output code = 011111111111 or 100000000000; enables real-time range monitoring. |
| GAIN (28) | PGA gain select | 5 V → 1× gain; 0 V → 2× gain; sets input scaling before ADC core to maximize dynamic range utilization. |
| D11–D0 (9–20) | Parallel 12-bit two's complement data outputs | MSB-first, latched on third CLK rising edge; compatible with 3V/5V logic via OVDD supply. |
| OVDD (22) | Digital output supply | Independent 2.7–5.25 V rail; allows direct interface to 3V FPGA or microcontroller I/O without level shifters. |
| OGND (21) | Digital output ground | Must be tied to system digital ground; separates digital switching noise from analog ground paths. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input with 75 dB CMRR | Eliminates ground loops and common-mode interference in noisy industrial or telecom environments. |
| Digitally selectable 1×/2× PGA gain | Optimizes signal-to-noise ratio across multiple sensor output ranges without external amplification. |
| Internal 4.096 V/2.048 V reference with ±15 ppm/°C tempco | Reduces BOM count and layout complexity while maintaining accuracy over 0°C to 70°C operating range. |
| Separate OVDD logic supply (2.7–5.25 V) | Enables seamless integration with mixed-voltage systems (e.g., 3.3 V FPGA + 5 V analog front-end). |
| Out-of-range (OF) indicator | Provides immediate hardware-level alert for signal clipping, simplifying firmware-based range management. |
| Dynamic logic auto-refresh (500 µs timeout) | Permits clock gating for power savings without risking increased current draw or logic corruption. |
Applications
| Telecommunications Baseband Receiver | Digital Signal Processing Front-End |
|---|---|
|
Use Scenario: Digitizing IF signals from quadrature demodulators in cellular base stations. IC Role / Device Role / Timing Role: High-fidelity 12-bit sampling ADC with 100 MHz bandwidth and 75 dB CMRR to preserve I/Q channel integrity. Use Value: Enables accurate complex baseband reconstruction with 83 dB SFDR, minimizing adjacent-channel interference in multi-carrier systems. |
Use Scenario: Capturing real-time sensor waveforms for FFT-based vibration analysis in predictive maintenance systems. IC Role / Device Role / Timing Role: Low-latency, pipeline-structured ADC delivering synchronized 10 Msps samples to FPGA-based DSP engine. Use Value: 71 dB S/(N+D) ensures >11-bit ENOB across 0–5 MHz spectrum, supporting reliable detection of sub-0.1% harmonic anomalies. |
| Multiplexed Data Acquisition System | Imaging System Analog Front-End |
|
Use Scenario: High-channel-count industrial DAQ using multiplexed analog inputs with shared ADC resource. IC Role / Device Role / Timing Role: Fast-settling (15 ns full-scale step) ADC with programmable PGA to accommodate diverse sensor sensitivities. Use Value: ±0.35 LSB INL and ±0.25 LSB DNL guarantee measurement linearity across all 4096 codes, critical for calibrated metrology-grade readings. |
Use Scenario: Digitizing CCD/CMOS sensor outputs in medical ultrasound or digital radiography equipment. IC Role / Device Role / Timing Role: Low-noise (0.22 LSBRMS), high-SFDR ADC capturing transient pixel bursts with minimal distortion. Use Value: 100 MHz full-power bandwidth preserves sharp edges in pulse-echo waveforms, improving spatial resolution in time-of-flight calculations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9220ARZ | 12-bit, 10 Msps, but uses external reference and lacks integrated PGA or VCM output. | Requires external op-amp and reference circuitry; higher BOM cost and board area. | Choose when absolute flexibility in reference voltage and gain staging is prioritized over integration. |
| MAX1186ETX+ | 12-bit, 10 Msps, single-supply only (3V), no differential input support, lower SFDR (78 dB). | Designed for portable/battery-powered systems; unsuitable for ±5V or differential signal environments. | Choose only for space-constrained 3V-only designs where differential CMRR and dual-supply operation are unnecessary. |
Compared with AD9220ARZ and MAX1186ETX+, the LTC1420CGN#TRPBF uniquely integrates PGA, VCM, and dual-supply-compatible differential input - reducing external component count by ≥40% while delivering superior SFDR and CMRR for fixed-precision, high-dynamic-range applications.
Availability
LTC1420CGN#TRPBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, digital signal processing front-ends, and multiplexed data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for LTC1420CGN#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1420CGN#TRPBF belongs to ADI's legacy Linear Technology high-speed precision ADC product line, engineered for applications demanding simultaneous high resolution, speed, and integrated signal conditioning - especially in space- and power-constrained instrumentation and comms systems.
FAQ
What is the operating temperature range for the LTC1420CGN#TRPBF?
The LTC1420CGN#TRPBF is specified for commercial-grade operation from 0°C to 70°C. This range is validated across all key parameters including ±0.35 LSB INL, 71 dB S/(N+D), and 10 Msps sample rate - ensuring consistent performance in office, lab, and non-extreme industrial environments. The 'C' suffix in the part number explicitly denotes this temperature grade.
Does the LTC1420CGN#TRPBF require an external clock driver for 10 Msps operation?
No, the LTC1420CGN#TRPBF accepts standard CMOS-level clock inputs directly. For optimal AC performance at 10 Msps, the CLK input should have <5 ns rise time; if the system clock exceeds this, a local buffer (e.g., 74AC04) can be used. The device does not require duty-cycle correction or LVDS conversion - simplifying timing design compared to many high-speed ADCs.
How does the GAIN pin affect the input range of the LTC1420CGN#TRPBF?
The GAIN pin (Pin 28) selects the programmable gain amplifier setting: 5 V applies 1× gain, yielding ±VREF/2 input range; 0 V applies 2× gain, yielding ±VREF/4. Combined with SENSE pin configuration (which sets VREF to 4.096 V, 2.048 V, or external), this enables three standard bipolar ranges: ±2.048 V, ±1.024 V, and ±0.512 V - all supported natively by the LTC1420CGN#TRPBF without external components.
Can the LTC1420CGN#TRPBF operate with a 3V digital interface while using ±5V analog supplies?
Yes. The LTC1420CGN#TRPBF features a dedicated OVDD pin (Pin 22) that powers the digital output drivers independently. Set OVDD to 3 V while maintaining VDD = +5 V and VSS = –5 V, and tie OGND (Pin 21) to the 3 V system ground. This allows direct connection to 3 V FPGAs or microcontrollers without level shifters - a capability confirmed in the LTC1420CGN#TRPBF datasheet under "Digital Outputs and Overflow Bit" section.
What is the purpose of the VCM pin on the LTC1420CGN#TRPBF?
The VCM pin (Pin 3) provides a low-impedance (8 Ω), factory-trimmed 2.500 V reference output with ±15 ppm/°C tempco. In single-supply configurations, it serves as the common-mode bias for the –AIN input, enabling true differential measurement without external voltage sources. It can also power external circuitry, reducing system reference component count - a verified function documented in the LTC1420CGN#TRPBF functional block diagram and applications information.
LTC1420CGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- ±4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1420CGN#TRPBF FAQ
1.How can I place an order for LTC1420CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1420CGN#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 LTC1420CGN#TRPBF reliable?
The price and inventory of LTC1420CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1420CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1420CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1420CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1420CGN#TRPBF?
LTC1420CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1420CGN#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 LTC1420CGN#TRPBF?
For technical support, including LTC1420CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1420CGN#TRPBF requirements.
6.How does Aetrix verify that LTC1420CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1420CGN#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 LTC1420CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1420CGN#TRPBF?
All LTC1420CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1420CGN#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 LTC1420CGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1420CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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