My Inquiry
My Account
Texas Instruments VCA2616YR
- Part No.:
- VCA2616YR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 48-TQFP
- Datasheet:
-
VCA2616YR.pdf
- Description:
- IC VARIABLE GAIN 2 CIRC 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,388
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VCA2616YR from Texas Instruments is a dual-channel, low-noise variable-gain amplifier with integrated preamplifier, designed for high-fidelity signal conditioning in ultrasound front-ends and RF receiver chains. It delivers 0.95nV/√Hz input-referred noise at 25dB LNP gain, 80MHz preamp bandwidth, 40MHz VCA bandwidth, differential I/O, and 5dB–25dB programmable LNP gain plus up to 40dB total VCA gain range.
For engineers reviewing the VCA2616YR datasheet, VCA2616YR pinout, VCA2616YR application, or VCA2616YR equivalent, this page provides verified specifications, TQFP-48 package mapping, channel-isolated analog control interface details, and validated alternatives for medical imaging and test equipment signal chain design.
Technical Context
The VCA2616YR integrates two independent signal paths, each comprising a low-noise preamplifier (LNP), voltage-controlled attenuator (VCA), and programmable gain amplifier (PGA). The LNP uses active feedback termination to achieve 6.2dB noise figure at 550Ω source impedance and supports four pin-strapped gains (5/17/22/25dB) via LNPGS1–3 pins.
Gain control is implemented through dual-stage programming: three MGS bits (pins 40–42) set maximum composite gain (24–45dB), while analog VCACNTL (pin 43) provides 0.2V–3.0V linear-in-dB attenuation across 40dB range with ±1dB gain error and 10.9dB/V slope. Crosstalk remains ≤–66dB at 5MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise Density | 0.95nV/√Hz at 25dB LNP gain - enables detection of weak echo signals in ultrasound beamforming |
| LNP Bandwidth | 80MHz at 22dB gain - supports wideband RF/IF signal acquisition up to UHF frequencies |
| VCA Bandwidth | 40MHz - maintains fidelity for fast transient response in pulsed ultrasound receivers |
| Crosstalk | –66dB at max gain, 5MHz - ensures channel isolation critical for dual-beam or multi-transducer systems |
| Gain Control Range | 0.2V–3.0V VCACNTL - allows precise dynamic range compression without digital DACs |
| Supply Voltage | +4.75V to +5.25V - compatible with standard 5V analog rails and low-noise LDOs |
| Power Dissipation | 410–495mW (both channels) - requires thermal-aware PCB layout with exposed pad grounding |
Pinout & Package
TQFP-48 package (PFB designation), 7mm × 7mm body, 0.5mm pitch, exposed thermal pad. Pin 1 marked by corner notch; pin 1 is VDDA (Channel A analog supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAINPA / VCAINNA | Channel A VCA differential input | Accepts either LNP output or external signal; common-mode level must be 2.5V |
| LNPOUTPA / LNPOUTNA | Channel A LNP differential output | Drives VCA directly; capable of 2VPP differential swing into ≥135Ω load |
| VCACNTL (Pin 43) | Analog gain control voltage input | 0.2V–3.0V sets VCA attenuation; 10.9dB/V slope enables linear dB control |
| MGS1–MGS3 (Pins 42–40) | Maximum Gain Select logic inputs | 3-bit code selects PGA gain ceiling: 24dB to 45dB in 3dB steps |
| VCM (Pin 19) | Internal 2.5V reference output | Provides bias for external coupling networks; must be bypassed with 0.01µF to GNDR |
| GNDA / GNDB / GNDR | Separate analog and reference grounds | Prevents inter-channel crosstalk and reference contamination in mixed-signal layouts |
Key Features
| Feature | Design Value |
|---|---|
| Active Termination Noise Reduction | Improves noise figure by up to 4.6dB vs passive shunt termination, critical for 75Ω cable interfaces |
| Switchable LNP Termination | Four pin-strapped gains (5/17/22/25dB) via LNPGS1–3 - eliminates need for external gain-setting resistors |
| Dual-Stage Gain Programming | MGS bits set upper gain limit; VCACNTL provides fine analog adjustment - enables adaptive AGC with <0.2µs response |
| Overdrive Recovery Circuitry | Integrated symmetric clipping and DC substitution prevents distortion hangover after large transients in ultrasound bursts |
| Independent Channel Power Domains | Separate VDDA/V DDB supplies and GNDA/GNDB grounds - reduces inter-channel crosstalk to –66dB |
Applications
| Ultrasound Beamforming | Wireless IF Receiver |
|---|---|
Use Scenario: Digitizing weak acoustic echoes from phased-array transducers with time-gain compensation (TGC). IC Role / Device Role / Timing Role: Dual-channel LNP+VCA front-end providing programmable gain, low-noise amplification, and differential ADC driving. Use Value: 0.95nV/√Hz input noise and 80MHz bandwidth preserve SNR and spatial resolution for >10MHz transducers. | Use Scenario: Downconverting and conditioning IF signals in broadband SDR receivers operating at 10–100MHz. IC Role / Device Role / Timing Role: Variable-gain IF amplifier with analog AGC control and 40MHz bandwidth for dynamic signal envelope management. Use Value: 40dB gain range and 10.9dB/V control slope enable precise real-time gain adaptation without microcontroller intervention. |
| Automated Test Equipment | High-Speed Data Acquisition |
Use Scenario: Signal conditioning stage in modular digitizers requiring wide dynamic range and low harmonic distortion. IC Role / Device Role / Timing Role: Low-distortion, low-crosstalk dual-channel amplifier for simultaneous multi-channel waveform capture. Use Value: –75dBc IMD and –66dB crosstalk ensure accurate multi-tone analysis and channel-to-channel phase coherence. | Use Scenario: Front-end for 12–14-bit, 50–100MSPS ADCs in oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Differential driver with 2VPP output swing, 300V/µs slew rate, and clean overdrive recovery. Use Value: Output short-circuit current of ±40mA and 2VPP swing into 500Ω support robust driving of high-speed ADC inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VCA2611YR | Enhanced LNP input tolerance: –2.0V negative spikes vs –0.3V on VCA2616YR; identical pinout and electrical specs otherwise | Enables use of slower/cheaper clamping diodes or eliminates clamping in some ultrasound probe designs | Select VCA2611YR when interfacing to high-slew-rate transducer drivers or unclamped analog front-ends |
| LMH6514MA/NOPB | Single-channel, 750MHz bandwidth, 24dB fixed gain, no integrated LNP; requires external preamp stage | Higher bandwidth but lacks low-noise preamp integration and dual-channel matching | Choose LMH6514MA/NOPB only when >100MHz IF bandwidth is required and system-level noise budget permits external LNP |
Compared with VCA2616YR, VCA2611YR offers improved input ruggedness without layout changes, while LMH6514MA/NOPB trades integration and channel matching for raw bandwidth - making VCA2616YR optimal for cost-sensitive, dual-channel, sub-100MHz medical and test applications.
Availability
VCA2616YR is available at Aetrix Electronics and suitable for ultrasound systems, wireless receivers, and automated test equipment requiring stable component supply, long-term production continuity, and traceable sourcing.
Supply support for VCA2616YR 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 signal chain solutions.
The VCA2616YR belongs to TI's precision analog variable-gain amplifier product line, engineered specifically for medical ultrasound, communications infrastructure, and high-fidelity instrumentation where ultra-low noise, channel matching, and analog AGC are essential.
FAQ
What is the absolute maximum negative input voltage rating for VCA2616YR?
The VCA2616YR LNP input is rated for –0.3V negative-going spikes under normal operation. Exceeding this may cause latch-up or permanent damage. This differs from the upgraded VCA2611YR, which supports –2.0V. Always implement input clamping diodes referenced to ground and VDD when interfacing with high-slew transducer drivers. The VCA2616YR datasheet specifies this limit in its Absolute Maximum Ratings table.
How does active termination improve noise performance in VCA2616YR?
Active termination in the VCA2616YR replaces conventional shunt resistors with controlled feedback, reducing theoretical SNR degradation from 3dB to near zero. This yields up to 4.6dB noise figure improvement over passive termination - confirmed by measured 6.2dB NF at 550Ω source impedance. The technique minimizes wasted signal current while preserving bandwidth, making VCA2616YR ideal for 75Ω video and RF interfaces.
Can VCA2616YR drive a 12-bit, 50MSPS ADC directly?
Yes, VCA2616YR can directly drive 12-bit, 50MSPS ADCs such as the ADS5400. Its differential outputs deliver 2VPP swing into 500Ω loads, feature ±40mA short-circuit current, and maintain –75dBc IMD at 10MHz. The 2.5V common-mode output aligns with typical ADC input requirements. For optimal performance, use matched 50Ω routing and terminate unused VCA inputs to 2.5V via 100Ω resistors. VCA2616YR's clean overdrive recovery prevents ADC saturation artifacts.
What is the purpose of the VCM pin on VCA2616YR?
The VCM pin (Pin 19) provides a stable, buffered 2.5V reference used to bias the internal LNP and VCA stages. It must be bypassed to GNDR with a 0.01µF capacitor. External circuits coupled to VCAINx or LNPINx should also reference this 2.5V level to ensure proper common-mode alignment and avoid gain errors. Deviations >±10mV from VCM degrade distortion and noise performance. VCA2616YR relies on VCM for DC level shifting between stages without external op amps.
How do the MGS bits affect total gain in VCA2616YR?
The MGS1–MGS3 pins (42–40) configure the maximum composite gain of the VCA2616YR's PGA stage, selecting ceilings from 24dB to 45dB in 3dB increments. When VCACNTL = 3.0V, the VCA operates at full MGS-selected gain; at VCACNTL = 0.2V, gain drops to ~21dB regardless of MGS setting. This dual-control architecture allows coarse digital setup and fine analog trimming - a key feature distinguishing VCA2616YR from simpler VCAs.
VCA2616YR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 2
- Output Type:
- Differential
- Slew Rate:
- 300V/µs
- Gain Bandwidth Product:
- 80 MHz
- -3db Bandwidth:
- 40 MHz
- Current - Input Bias:
- 1 nA
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
VCA2616YR FAQ
1.How can I place an order for VCA2616YR through Aetrix?
Please submit a Request for Quotation (RFQ) for VCA2616YR 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 VCA2616YR reliable?
The price and inventory of VCA2616YR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VCA2616YR is usually 5 days.
3.What payment methods are accepted for VCA2616YR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VCA2616YR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VCA2616YR?
VCA2616YR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VCA2616YR 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 VCA2616YR?
For technical support, including VCA2616YR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VCA2616YR requirements.
6.How does Aetrix verify that VCA2616YR is sourced from the original manufacturer or authorized distributors?
All VCA2616YR 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 VCA2616YR meets industry standards.
7.What is the process for return or replacement of VCA2616YR?
All VCA2616YR units undergo pre-shipment inspection (PSI). If there is an issue with VCA2616YR, 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 VCA2616YR part is unused and in its original packaging.
Return procedure for VCA2616YR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VCA2616YR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
