OPA2670 - 700mA VDSL2 Line Driver Op Amp | Texas Instruments
MPN: OPA2670 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.9 | $5.90 |
| 10 | $5.31 | $53.10 |
| 100 | $4.48 | $448.00 |
| 500 | $4.02 | $2,010.00 |
| 1,000 | $3.6 | $3,600.00 |
Drop-in alternatives for OPA2670 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
OPA2675
β Drop-Inπ Reference alternative (not in catalog)
OPA2670 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Current-Feedback Operational Amplifier (Line Driver) |
| Channels | 2 (Dual) |
| Output Current | 700 mA |
| Supply Voltage | +12 V single supply |
| Quiescent Current | 30.5 mA (21 mA per port) |
| Output Swing | Within 1 V of either rail |
| Topology | Current feedback with power control |
| Application | VDSL2, xDSL, PLC line driver |
| Package | VQFN-16 (RGV, 4x4 mm) |
| Mounting Type | Surface Mount |
| Power Control | Yes (disable/power-save pins) |
| RoHS Status | Compliant |
OPA2670 Pin Configuration
| Pin 1 | IN- (A) β Channel A inverting input |
| Pin 2 | IN+ (A) β Channel A non-inverting input |
| Pin 3 | [DATA_NEEDED: pin 3 name] β [DATA_NEEDED] |
| Pin 4 | [DATA_NEEDED: pin 4 name] β [DATA_NEEDED] |
| Pin 5 | [DATA_NEEDED: pin 5 name] β [DATA_NEEDED] |
| Pin 6 | [DATA_NEEDED: pin 6 name] β [DATA_NEEDED] |
| Pin 7 | V+ β Positive supply (+12V) |
| Pin 8 | [DATA_NEEDED: pin 8 name] β [DATA_NEEDED] |
| Pin 9 | OUT (A) β Channel A output |
| Pin 10 | [DATA_NEEDED: pin 10 name] β [DATA_NEEDED] |
| Pin 11 | Power Save/Disable β Power control pin |
| Pin 12 | [DATA_NEEDED: pin 12 name] β [DATA_NEEDED] |
| Pin 13 | OUT (B) β Channel B output |
| Pin 14 | [DATA_NEEDED: pin 14 name] β [DATA_NEEDED] |
| Pin 15 | IN- (B) β Channel B inverting input |
| Pin 16 | IN+ (B) β Channel B non-inverting input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
OPA2670 is suitable for 6 applications: VDSL2 Line Driver, Power Line Communication (PLC) Modem Driver, xDSL CO Line Card, CPE Modem Line Driving, High-Current ADC Output Buffer, Transformer-Coupled Line Transmitter.
VDSL2 Line Driver
The OPA2670 was designed specifically as a single-port VDSL2 line driver, providing the >450mA minimum output current demanded by the most stringent xDSL profiles while delivering up to 700mA peak. Its current-feedback topology sustains low distortion at VDSL2 signal frequencies, and the output swings within 1V of the rails to maximize transformer drive on a +12V supply. Power-control pins cut the 21mA-per-port bias during idle periods, reducing thermal load in dense CO line cards.
Recommended
Power Line Communication (PLC) Modem Driver
For HomePlug-class PLC modems, the OPA2670 differentially drives low-impedance power-line coupling networks through a transformer with up to 700mA output current. The 1V-from-rail output swing on a +12V supply maximizes delivered line power, while the power-save feature reduces the 30.5mA total quiescent current when the channel is idle - important for smart-meter and HomePlug GreenPHY-adjacent designs with thermal or energy constraints.
Recommended
xDSL CO Line Card
In central-office DSLAM line cards, density and thermal budget dominate. The OPA2670's low 21mA-per-port quiescent current plus power-save control allow hundreds of ports per shelf without excessive heating, while the 700mA capability and linear high-power output stage preserve DSL spectral mask compliance into 100-ohm transformer loads. The compact VQFN-16 4x4mm footprint conserves board area per port.
Recommended
CPE Modem Line Driving
Customer premises equipment benefits from the OPA2670's power-control pins, which disable or reduce bias during idle line conditions to cut the 21mA-per-port draw - extending battery-backup runtime in ONTs and gateways. Its 700mA output meets all VDSL2 profile requirements at the CPE side, and the VQFN-16 package suits space-limited residential hardware.
Recommended
High-Current ADC Output Buffer
Beyond DSL, the OPA2670 serves as a high-current buffer for DAC/ADC output stages driving heavy or low-impedance loads. The current-feedback input stage keeps bandwidth nearly constant with closed-loop gain, and the linear high-power output stage preserves signal fidelity at high peak currents. The 1V-from-rail swing on +12V maximizes usable voltage range in 12V-single-supply acquisition systems.
Recommended
Transformer-Coupled Line Transmitter
Any design transmitting signals through a transformer into a low-impedance line - telecom pairs, power lines, or specialty networks - can use the OPA2670's 700mA drive and wideband current-feedback response. Configured as a differential driver, it delivers balanced drive across the primary while the power-save pin trims bias during silent intervals, reducing average system power without redesign.
Recommended
Recommended Products Summary
Engineering reference data for OPA2670 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA2675 | THS6212 | THS6222 |
|---|---|---|---|---|
| Package | VQFN-16 (RGV, 4x4 mm) | VQFN-16 (RGV, 4x4 mm) - same | [DATA_NEEDED] | [DATA_NEEDED] |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 700 mA | [DATA_NEEDED: output current] | [DATA_NEEDED: output current] | [DATA_NEEDED: output current] |
| Quiescent Current | 30.5 mA total / 21 mA per port | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Voltage | +12 V single supply | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Output Swing | Within 1 V of either rail | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Amplifier Topology | Current feedback | Current feedback | [DATA_NEEDED] | [DATA_NEEDED] |
| Pin Compatible (Drop-In) | - | Yes - same package and pinout | No - redesign required | No - redesign required |
Key Differentiators
- Highest output current in its TI line-driver class (vs THS6212)
- True drop-in compatibility within the OPA267x family (vs OPA2675)
- Integrated power-save control (vs OPA2673)
Design Notes
At 700mA peak output into a transformer load, junction heating is significant. Solder the VQFN-16 exposed pad to a substantial ground copper pour (multiple thermal vias to inner layers) to keep junction temperature within limits. Use the power-save feature during idle line periods to cut the 21mA-per-port bias and reduce average dissipation in thermally constrained CO line cards or CPE hardware.
As a current-feedback amplifier, the OPA2670 is sensitive to feedback-loop stray capacitance and inductance. Keep the feedback resistor network short, use surface-mount resistors with appropriate values (per datasheet recommended feedback/gain resistor combinations), and place decoupling capacitors (e.g., 6.8uF bulk plus 0.1uF ceramic per supply pin) directly at the V+ pins with a low-inductance ground return on the exposed pad.
Do not substitute a voltage-feedback compensation approach: current-feedback amplifiers require datasheet-specified feedback resistor values and cannot use capacitive feedback directly. Also verify power-save pin logic levels in the datasheet before wiring disable control - mis-driving the power-control pin may leave the device in reduced-bias mode and degrade linearity during active bursts.
Compliance Information
RoHS compliant per TI product page. Other compliance attributes not stated in verified data.
