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Texas Instruments VCA2617RHBR
- Part No.:
- VCA2617RHBR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
VCA2617RHBR.pdf
- Description:
- IC VARIABLE GAIN 2 CIRC 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
VCA2617RHBR from Texas Instruments is a dual-channel, voltage-controlled gain amplifier (VGA) designed for ultrasound front-ends and high-speed analog signal conditioning. It delivers 48dB continuous gain range, 50MHz bandwidth, 4.1nV/√Hz input noise, −53dBc 2nd-harmonic distortion at 5MHz, and operates from a single +5V supply in QFN-32 package - enabling precise dynamic range control in medical imaging receivers.
For engineers reviewing the VCA2617RHBR datasheet, VCA2617RHBR pinout, VCA2617RHBR application, or VCA2617RHBR equivalent, key selection criteria include linear-in-dB gain control accuracy (±0.9dB), channel-independent clamping (0.25–2.6V), post-gain select (−16dB to +32dB or −10dB to +38dB), and differential output drive capability into 500Ω loads with <±50mV offset.
Technical Context
The VCA2617RHBR implements a true variable-gain amplifier architecture-not an attenuator-plus-fixed-amplifier-enabling noise performance that improves at lower gains (e.g., 100nV/√Hz at 0dB vs. 4.1nV/√Hz at 45dB). Its exponential FET resistor network provides 48dB gain control via 0.2–2.3V VCNTL inputs with 22dB/V slope and ±0.9dB gain error over 0.4–2.0V.
Each channel features independent high-impedance gain control (VCNTLA/B), clamp voltage programming (VCLMPA/B), high/low gain mode selection (HGA/HGB), and power-down (PD). The internal clamping circuitry responds to externally applied VCLMP voltages to set peak-to-peak output limits, supporting fast overload recovery (<2µs power-down response) and clean settling during signal transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 48dB continuous (0.2–2.3V VCNTL); supports −16dB to +32dB or −10dB to +38dB via HG pin - enables ADC input swing optimization for 10-bit or 12-bit systems. |
| Input Noise | 4.1nV/√Hz at 45dB gain (RS = 0Ω) - ensures high SNR in low-amplitude echo signal amplification. |
| Bandwidth | 50MHz (HG = 0, VCNTL = 2.3V) - supports wideband ultrasound imaging up to 15MHz center frequency with adequate group delay flatness. |
| Harmonic Distortion | −53dBc 2nd-harmonic, −62dBc 3rd-harmonic at 5MHz, 1VPP output - preserves spectral integrity for Doppler and B-mode processing. |
| Crosstalk | −61dB at 5MHz - maintains channel isolation critical for beamforming accuracy in multi-channel ultrasound arrays. |
| Power Consumption | 105mW typical (52mW/channel), 22mW in power-down - enables thermal management in densely packed probe electronics. |
| Supply Voltage | +4.75V to +5.25V - compatible with standard 5V LDOs and supports rail-to-rail operation without external level-shifting. |
Pinout & Package
Package: QFN-32 (RHB), 5mm × 5mm, exposed thermal pad tied to ground. RoHS-compliant, NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 32 | INA+, INA− | Differential input for Channel A - high-impedance (300kΩ), low-capacitance (8pF) interface for transducer signals. |
| 8, 9 | INB+, INB− | Differential input for Channel B - identical specs to Channel A; supports independent signal paths in multi-element arrays. |
| 24, 17 | VCNTLA, VCNTLB | High-impedance (1MΩ) gain control voltage inputs - 0.2–2.3V linear-in-dB range sets per-channel VGA gain independently. |
| 23, 18 | VCLMPA, VCLMPB | Clamp reference voltage inputs - 0.25–2.6V setting defines peak-to-peak output limit for overload protection and ADC full-scale matching. |
| 22, 19 | HGA, HGB | High/Low gain mode select (active-high) - configures post-gain as +6dB (HG = 0) or 0dB (HG = 1) to match ADC input ranges. |
| 20 | PD | Power-down enable (active-high) - reduces quiescent current to 22mW and disables outputs within 2µs for burst-mode operation. |
| 25, 26, 15, 16 | OutA+, OutA−, OutB−, OutB+ | Differential outputs - 3Ω output impedance, ±50mV offset, 6VPP max swing; drives anti-aliasing filters directly. |
| 28, 13, 3, 5, 6, 14, 27, 4 | VDDA, VDDB, VDDR, VCM, GNDR, GNDB, GNDA, VB | Channel-specific supplies, reference, grounds, and bias - decoupling required per channel to maintain PSRR >60dB and crosstalk <−61dB. |
Key Features
| Feature | Design Value |
|---|---|
| True variable-gain amplifier architecture | Reduces input-referred noise at low gains (100nV/√Hz at 0dB) - unlike attenuator+fixed-gain designs, avoids noise floor degradation when gain is reduced. |
| Independent channel clamping | Externally programmable VCLMP pins set differential output clipping level (0.25–2.6V) - enables precise alignment with ADC full-scale and prevents false spectral components. |
| Post-gain select (±6dB) | HG pin configures output amplifier gain to optimize signal swing for 10-bit (±1V) or 12-bit (±2V) ADCs - eliminates need for external gain stages. |
| Fast gain control transient response | 0.5µs to 90% signal level for 42dB gain step - supports real-time time-gain compensation (TGC) in ultrasound beamforming. |
| Low-power power-down mode | 22mW total consumption with outputs disabled - extends battery life in portable ultrasound systems and reduces thermal load in probe assemblies. |
Applications
| Medical Ultrasound Beamforming | Industrial Non-Destructive Testing (NDT) |
|---|---|
|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers across depth-dependent time-gain compensation (TGC) profiles in handheld and cart-based scanners. IC Role / Device Role / Timing Role: Dual-channel VGA providing independent, voltage-controlled gain and clamping per receive channel in analog front-end (AFE) before anti-aliasing filtering and ADC sampling. Use Value: 48dB gain range and 4.1nV/√Hz noise ensure detection of low-amplitude deep-tissue echoes; −61dB crosstalk preserves spatial resolution in phased-array beamforming. |
Use Scenario: Signal conditioning in ultrasonic flaw detectors used for weld inspection, thickness gauging, and material characterization in aerospace and energy sectors. IC Role / Device Role / Timing Role: High-bandwidth VGA driving 5–15MHz transducer signals with programmable clamping to handle variable return amplitudes from surface and subsurface defects. Use Value: 50MHz bandwidth supports wideband pulse-echo analysis; 22dB/V gain slope enables precise TGC calibration; power-down mode reduces heat in sealed enclosures. |
| High-Speed Test Equipment | Sonar Signal Processing |
|
Use Scenario: Dynamic range extension in automated test equipment (ATE) for RF and mixed-signal IC validation, where input signal levels vary widely across DUT configurations. IC Role / Device Role / Timing Role: Precision VGA inserted between signal source and digitizer to normalize input amplitude prior to FFT-based spectral analysis. Use Value: ±0.9dB gain error and −53dBc distortion preserve measurement fidelity; differential outputs reject common-mode noise in noisy lab environments. |
Use Scenario: Receive-path amplification in active sonar systems deployed on marine vessels and autonomous underwater vehicles (AUVs), operating in 10–500kHz bands. IC Role / Device Role / Timing Role: Low-noise, high-linearity VGA conditioning echo returns from water column and seabed targets under varying salinity and temperature conditions. Use Value: Single +5V supply simplifies power architecture in space-constrained hull-mounted electronics; −40°C to +85°C rating ensures reliability in harsh marine environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-controlled amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VCA2615 | Dual-channel VGA with integrated preamp stage; higher input noise (5.2nV/√Hz); no clamping circuitry; same QFN-32 package. | Lacks programmable output clamping and independent channel control - unsuitable for TGC-critical ultrasound but useful where preamplification is needed before gain control. | Select VCA2615 only if system requires combined low-noise preamp + VGA in one device and clamping is handled externally. |
| VCA2619 | Uses attenuator+fixed-gain architecture; higher noise at low gains (500nV/√Hz at 0dB); 40dB gain range; same pinout and supply. | Poorer low-gain noise performance limits dynamic range in deep-tissue imaging; lacks independent clamping per channel. | VCA2619 is a legacy alternative with known trade-offs in noise and flexibility - choose only for drop-in replacement where existing layout cannot be modified and low-gain SNR is not critical. |
Compared with VCA2615 and VCA2619, the VCA2617RHBR provides superior low-gain noise performance, per-channel clamping, and wider 48dB gain range - making it the preferred choice for modern ultrasound AFEs requiring high-fidelity time-gain compensation and ADC interface optimization.
Availability
VCA2617RHBR is available at Aetrix Electronics and suitable for medical imaging systems, industrial NDT equipment, high-speed test instrumentation, and sonar receivers requiring stable component supply across extended product lifecycles.
Supply support for VCA2617RHBR 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 and embedded processing technologies, with decades of expertise in high-performance signal chain solutions.
The VCA2617RHBR belongs to TI's ultrasound analog front-end (AFE) product line, engineered specifically for medical and industrial imaging systems requiring precision variable gain, low noise, and robust overload handling in compact form factors.
FAQ
What is the gain control voltage range for the VCA2617RHBR?
The VCA2617RHBR accepts a linear-in-dB gain control voltage from 0.2V to 2.3V on VCNTLA and VCNTLB pins, delivering a 48dB gain range. Within the 0.4V–2.0V span, gain slope is 22dB/V with ±0.9dB error. This range allows precise time-gain compensation (TGC) profiling in ultrasound systems using standard DAC outputs.
How does the clamping function work on the VCA2617RHBR?
The VCA2617RHBR uses VCLMPA and VCLMPB pins to set differential output clipping levels from 0.25V to 2.6V. When HG = 0, the clipped differential output equals VCLMP; when HG = 1, it equals twice VCLMP. This enables direct matching to ADC full-scale ranges while maintaining fast overload recovery - critical for preserving signal integrity during echo bursts.
Does the VCA2617RHBR support differential input and output operation?
Yes, the VCA2617RHBR is fully differential: each channel has dedicated +IN/−IN inputs (e.g., INA+/INA−, INB+/INB−) and +OUT/−OUT outputs (e.g., OutA+/OutA−). Input resistance is 300kΩ, input capacitance is 8pF, and output impedance is 3Ω at 5MHz - optimized for driving anti-aliasing filters and ADCs in high-fidelity ultrasound AFEs.
What is the power consumption of the VCA2617RHBR in active and power-down modes?
The VCA2617RHBR consumes 105mW typical (52mW per channel) under normal operation with +5V supply. In power-down mode (PD = high), total dissipation drops to 22mW. Power-up and power-down response times are 25µs and 2µs respectively - enabling rapid channel gating in burst-mode ultrasound acquisition.
Can the VCA2617RHBR be used with both 10-bit and 12-bit analog-to-digital converters?
Yes, the VCA2617RHBR supports both 10-bit and 12-bit ADCs via its HG pin. When HG = 0, post-gain is +6dB - optimizing output swing for 10-bit ADCs with ±1V full-scale. When HG = 1, post-gain is 0dB - better suited for 12-bit ADCs requiring ±2V input range. This eliminates external gain staging and simplifies AFE design.
VCA2617RHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 2
- Output Type:
- Differential
- Slew Rate:
- 100V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- 60 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:
- 32-VQFN (5x5)
VCA2617RHBR FAQ
1.How can I place an order for VCA2617RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for VCA2617RHBR 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 VCA2617RHBR reliable?
The price and inventory of VCA2617RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VCA2617RHBR is usually 5 days.
3.What payment methods are accepted for VCA2617RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VCA2617RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VCA2617RHBR?
VCA2617RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VCA2617RHBR 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 VCA2617RHBR?
For technical support, including VCA2617RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VCA2617RHBR requirements.
6.How does Aetrix verify that VCA2617RHBR is sourced from the original manufacturer or authorized distributors?
All VCA2617RHBR 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 VCA2617RHBR meets industry standards.
7.What is the process for return or replacement of VCA2617RHBR?
All VCA2617RHBR units undergo pre-shipment inspection (PSI). If there is an issue with VCA2617RHBR, 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 VCA2617RHBR part is unused and in its original packaging.
Return procedure for VCA2617RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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