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Texas Instruments ADS5277IPFP
- Part No.:
- ADS5277IPFP
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 80-TQFP Exposed Pad
- Datasheet:
-
ADS5277IPFP.pdf
- Description:
- IC ADC 10BIT PIPELINED 80HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
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Product details
Overview
ADS5277IPFP from Texas Instruments is an 8-channel, 10-bit, 65MSPS analog-to-digital converter with integrated PLL, simultaneous sample-and-hold, and serialized LVDS outputs. It delivers 61.7dBFS SNR at 5MHz IF, operates from 3.3V analog/digital supplies, and supports internal or external reference modes. Used in portable ultrasound systems for multi-channel RF signal digitization.
For engineers reviewing the ADS5277IPFP datasheet, ADS5277IPFP pinout, ADS5277IPFP application, or ADS5277IPFP equivalent, this page provides verified technical context, real-world timing behavior, LVDS interface constraints, channel-level power-down control, and validated alternative options for high-density medical and test equipment designs.
Technical Context
The ADS5277IPFP integrates eight independent 10-bit ADC cores sharing a single ADCLK input, each with dedicated S/H and LVDS serializer. An on-chip PLL multiplies ADCLK by 12 to generate 390MHz LCLK for serialization, enabling 780Mbps per channel (12-bit word, LSB-first, two zero-padded LSBs).
It supports dual reference architectures: internal bandgap-derived REFT/REFB (1.95V/0.95V, 2.03VPP full-scale) or external reference with VCM tracking; all eight channels share common VCM output and INT/EXT selection. Serial register access via SCLK/SDATA/CS enables dynamic LVDS current tuning (2.5–6.0mA), MSB/LSB mode, and per-channel power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonicity and full code coverage across full operating range. |
| Sample Rate | 65MSPS maximum - sets Nyquist limit of 32.5MHz; supports baseband digitization of ultrasound IF signals. |
| SNR @ 5MHz | 61.7dBFS typical - defines minimum detectable signal level above quantization + thermal noise floor. |
| LVDS Data Rate | 780Mbps per channel - requires controlled-impedance 100Ω differential routing and ≤6pF load capacitance. |
| Power Dissipation | 911mW (internal ref) / 845mW (external ref) - constrains thermal design in dense portable systems. |
| Analog Input BW | 300MHz - enables direct sampling of wideband RF/IF signals without external anti-alias filtering. |
| Aperture Jitter | 1ps RMS - limits SNR degradation at high input frequencies; critical for >10MHz IF performance. |
Pinout & Package
ADS5277IPFP is housed in an HTQFP-80 PowerPAD™ package (12mm × 12mm, 0.5mm pitch) with exposed thermal pad (4.69–6.20mm²). Pin assignments follow TI's standardized layout for 8-channel serial ADCs, supporting decoupling, ground separation (AVSS/LVSS), and LVDS signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADCLK (71) | Input clock | Primary sampling clock input (20–65MHz TTL); triggers all 8 S/H circuits simultaneously. |
| IN1P–IN8N (2,3,5,6,…,58,59) | Differential analog inputs | Eight fully independent differential input pairs; each accepts ±1.015VPP (2.03VPP) swing with VCM = 1.45V. |
| OUT1P–OUT8N (21,22,…,39,40) | LVDS data outputs | Eight serialized 12-bit words (10-bit ADC + 2 zero LSBs), LSB-first, 780Mbps, 3.5mA default drive. |
| LCLKP/LCLKN (19,20) | LVDS word clock | 6× ADCLK frequency (120–390MHz); synchronizes frame alignment across all 8 LVDS data streams. |
| ADCLKP/ADCLKN (41,42) | LVDS bit clock | 6× ADCLK frequency; used for receiver clock recovery; phase-aligned to LCLK within ±0.9ns. |
| INT/EXT (69) | Reference mode select | Logic-high = internal reference (REFT/REFB generated on-chip); logic-low = external reference mode. |
| RESET (45) | Asynchronous reset | Pulls all registers to default state (LSB-first, 3.5mA LVDS, all channels active); weak pull-down. |
| PD (16) | Global power-down | Enters low-power state (92–149mW); preserves register settings; weak pull-down. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PLL clock multiplier | 12× multiplication of ADCLK enables high-speed LVDS serialization without external clock synthesis. |
| Per-channel power-down control | Registers 2 and 3 allow selective shutdown of any subset of 8 channels to reduce system power dynamically. |
| Four LVDS output current modes | 2.5/3.5/4.5/6.0mA per channel - adjustable via register 0 to match trace loss and receiver sensitivity. |
| Programmable MSB/LSB serialization order | Register 1 bit D1 selects LSB-first (default) or MSB-first format - ensures compatibility with FPGA serializers. |
| Built-in test patterns | Deskew, sync, and custom patterns (registers 4–6) enable link integrity verification without external stimulus. |
Applications
| Portable Ultrasound Systems | Tape Drive Read Channels |
|---|---|
|
Use Scenario: Digitizing 8 parallel RF echo signals from phased-array transducers in handheld ultrasound units. IC Role / Device Role / Timing Role: Simultaneous sample-and-hold + 10-bit conversion + LVDS serialization at 65MSPS per channel. Use Value: Enables compact, battery-operated systems with 300MHz analog bandwidth and 61.7dBFS SNR for high-fidelity B-mode imaging. |
Use Scenario: Reading high-density magnetic tape signals with precise timing and low jitter in enterprise backup drives. IC Role / Device Role / Timing Role: High-speed analog front-end digitizer with deterministic latency (6.5 cycles) and 1ps aperture jitter. Use Value: Supports reliable decoding of narrow-track NRZI-encoded waveforms under variable tape speed and head misalignment. |
| Automated Test Equipment (ATE) | Communications Signal Analyzers |
|
Use Scenario: Multi-channel acquisition of DUT response in production test fixtures requiring synchronized sampling. IC Role / Device Role / Timing Role: 8-channel time-interleaved capture with shared ADCLK and frame-synchronized LVDS outputs. Use Value: Eliminates need for external clock distribution and deserialization logic; reduces PCB area and skew management complexity. |
Use Scenario: Capturing wideband IF signals (e.g., 5–20MHz) from RF downconverters in spectrum monitoring hardware. IC Role / Device Role / Timing Role: High-SNR digitizer with 61.7dBFS SNR and 85dBc SFDR at 5MHz, supporting real-time FFT analysis. Use Value: Delivers clean spectral data without harmonic contamination, enabling accurate modulation quality assessment (EVM, ACLR). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS5272IPFP | 12-bit resolution, same 65MSPS rate, identical HTQFP-80 package and pinout. | Higher dynamic range (72dBFS SNR) but 25% higher power (1.15W vs. 911mW); requires tighter layout for noise immunity. | Select when ENOB > 10 bits is required and power budget allows; drop-in replacement with no layout change. |
| ADS5273IPFP | 12-bit, 70MSPS, same package; LCLK runs at 7× ADCLK (420MHz max), not 6×. | Supports higher IF bandwidths but increases LVDS timing margin pressure; SNR drops slightly at max rate (60.5dBFS). | Choose for systems needing >65MSPS aggregate throughput; verify FPGA receiver setup for 840Mbps/channel. |
Compared with ADS5277IPFP, ADS5272IPFP trades 2-bit resolution for 11dB SNR improvement at equal sample rate, while ADS5273IPFP extends rate to 70MSPS with higher LVDS clock demands - both retain register compatibility and require identical power/ground partitioning.
Availability
ADS5277IPFP is available at Aetrix Electronics and suitable for portable ultrasound systems, automated test equipment, and communications signal analyzers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS5277IPFP 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters for industrial, medical, and communications markets.
The ADS5277IPFP belongs to TI's high-speed, multi-channel ADC product line designed specifically for portable medical imaging and test instrumentation where density, power efficiency, and LVDS interface simplicity are critical.
FAQ
What is the maximum sampling rate supported by the ADS5277IPFP?
The ADS5277IPFP supports a maximum sampling rate of 65MSPS across all eight channels simultaneously. This rate is specified over the full operating temperature range (–40°C to +85°C) and is validated with internal reference, 3.3V supplies, and 50% ADCLK duty cycle. Exceeding 65MSPS may result in degraded AC performance including reduced SNR and increased DNL.
Does the ADS5277IPFP require an external clock source for its LVDS outputs?
No - the ADS5277IPFP contains an integrated PLL that multiplies the incoming ADCLK by 12 to generate the high-frequency LCLK (up to 390MHz) and ADCLKP/ADCLKN outputs. These LVDS clocks are fully derived internally and do not require external clock generation circuitry, simplifying system clock tree design.
How does the internal reference mode affect full-scale input voltage on the ADS5277IPFP?
In internal reference mode (INT/EXT = high), the ADS5277IPFP generates REFT = 1.95V and REFB = 0.95V, resulting in a 2.03VPP differential full-scale input range centered at VCM = 1.45V. This eliminates need for external reference components and ensures matched channel gain/offset without trimming.
Can individual ADC channels be powered down on the ADS5277IPFP?
Yes - the ADS5277IPFP supports per-channel power-down via registers 2 and 3. Each register controls four channels (Reg2: Ch1–Ch4; Reg3: Ch5–Ch8), allowing any combination of active/sleep channels. This feature reduces total power consumption proportionally - e.g., disabling four channels cuts analog power by ~35%.
What LVDS output current options are available on the ADS5277IPFP?
The ADS5277IPFP offers four programmable LVDS output current levels: 2.5mA, 3.5mA (default), 4.5mA, and 6.0mA per channel, set via Register 0 bits D1–D0. Higher currents improve noise margin over longer traces but increase power and crosstalk; lower currents reduce EMI in dense layouts.
ADS5277IPFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 80-TQFP Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 65M
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 8
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 80-HTQFP (12x12)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS5277IPFP FAQ
1.How can I place an order for ADS5277IPFP through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS5277IPFP 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 ADS5277IPFP reliable?
The price and inventory of ADS5277IPFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS5277IPFP is usually 5 days.
3.What payment methods are accepted for ADS5277IPFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS5277IPFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS5277IPFP?
ADS5277IPFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS5277IPFP 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 ADS5277IPFP?
For technical support, including ADS5277IPFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS5277IPFP requirements.
6.How does Aetrix verify that ADS5277IPFP is sourced from the original manufacturer or authorized distributors?
All ADS5277IPFP 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 ADS5277IPFP meets industry standards.
7.What is the process for return or replacement of ADS5277IPFP?
All ADS5277IPFP units undergo pre-shipment inspection (PSI). If there is an issue with ADS5277IPFP, 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 ADS5277IPFP part is unused and in its original packaging.
Return procedure for ADS5277IPFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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