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Texas Instruments INA1650IPW
- Part No.:
- INA1650IPW
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA1650IPW.pdf
- Description:
- IC AUDIO RECEIVER 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
INA1650IPW from Texas Instruments is a dual-channel, high-precision audio line receiver IC designed for differential-to-single-ended signal conversion in professional audio interfaces. It delivers 91 dB typical common-mode rejection ratio (CMRR), –120 dB THD+N at 22 dBu, and 2.7 MHz bandwidth while operating from ±2.25 V to ±18 V supplies - enabling robust noise rejection in live sound mixing consoles and broadcast equipment.
For engineers reviewing the INA1650IPW datasheet, INA1650IPW pinout, INA1650IPW application, or INA1650IPW equivalent, key selection criteria include verified CMRR over temperature, integrated EMI filtering, buffered mid-supply reference (VMID(OUT)), dual-channel channel separation >130 dB, and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The INA1650IPW implements an instrumentation amplifier topology with on-die matched 10-kΩ resistor networks - not a discrete four-resistor difference amplifier - ensuring stable CMRR even with mismatched source impedances. Its input buffers isolate external PCB trace impedance from internal resistor matching, preserving rejection performance.
It integrates a precision supply-divider circuit (dual 500-kΩ resistors + buffer) generating VMID(OUT) at (VCC + VEE)/2, usable as bias reference for single-supply operation. The VMID(IN) pin allows external capacitor filtering of divider noise, and REF/COM pins support ground- or VMID-referenced configurations - directly affecting CMRR (91 dB vs. 86 dB) and channel separation (140 dB vs. 130 dB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CMRR | 91 dB typical (VREF/COM grounded, ±18 V); enables rejection of cable-borne hum and RF interference in long-line audio runs |
| THD+N | –120 dB at 1 kHz, 22 dBu output (±18 V); meets high-end A/V receiver distortion requirements without post-processing |
| Bandwidth | 2.7 MHz small-signal; supports full-audio-band fidelity up to 20 kHz with margin for slew-induced distortion |
| Input Impedance | 1 MΩ differential; minimizes loading on balanced line drivers and preserves source signal integrity |
| Supply Range | ±2.25 V to ±18 V; supports portable battery-powered gear (±2.25 V) and studio-grade rack units (±18 V) |
| Quiescent Current | 10.5 mA typical (dual-channel); enables thermal management in multi-channel audio DSP boards |
| Channel Separation | 140 dB at 1 kHz (REF/COM grounded); prevents crosstalk between left/right channels in stereo systems |
Pinout & Package
INA1650IPW is housed in a 14-pin TSSOP package (4.40 mm × 5.00 mm), optimized for automated assembly and thermal dissipation in audio PCBs with tight layout constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive power supply rail | Highest voltage potential; must be decoupled locally to suppress supply noise coupling into audio path |
| VEE | Negative power supply rail | Lowest voltage potential; symmetric dual supply enables true bipolar signal handling without DC offset |
| IN+ A / IN– A | Differential input, channel A | Accepts balanced audio signal; high-impedance inputs preserve source common-mode rejection |
| COM A | Input common reference, channel A | Provides return path for input bias current; connects to ground (dual-supply) or VMID(OUT) (single-supply) |
| OUT A | Single-ended output, channel A | Drives downstream ADC or op-amp stage; low 1-Ω output impedance maintains signal integrity into 600-Ω loads |
| REF A | Reference input, channel A | Must be driven from low-impedance source (e.g., VMID(OUT)); sets common-mode level for differential input stage |
| IN+ B / IN– B | Differential input, channel B | Independent second channel for stereo or dual-mono operation; identical specs to channel A |
| COM B | Input common reference, channel B | Independent reference node per channel; allows mixed supply configurations across channels if needed |
| OUT B | Single-ended output, channel B | Fully isolated output stage; supports independent gain staging or routing in multi-channel systems |
| REF B | Reference input, channel B | Separate reference control per channel; enables asymmetric common-mode biasing in specialized applications |
| VMID(IN) | Internal supply divider input | Node between 500-kΩ resistors; connect 1-µF capacitor to reduce noise from divider's thermal/resistive sources |
| VMID(OUT) | Buffered mid-supply output | Low-impedance (0.35 Ω), low-noise (1.56 µVRMS) reference for REF/COM pins in single-supply designs |
Key Features
| Feature | Design Value |
|---|---|
| On-die matched 10-kΩ resistor network | Enables 91 dB CMRR without external trimming; immune to PCB layout mismatches that degrade discrete solutions |
| Integrated EMI filters on input buffers | 80-MHz corner frequency suppresses RF ingress from wireless microphones, Wi-Fi, and digital switching noise |
| Buffered VMID(OUT) reference | Provides stable, low-Z (0.35 Ω), low-noise (1.56 µVRMS) midsupply bias - eliminating need for external op-amp reference circuits |
| Short-circuit protection | ±75 mA continuous short-circuit current limit (±18 V) protects against accidental output shorts in field-deployed gear |
| Wide temperature range | Specified from –40°C to +125°C; supports operation in unventilated rack enclosures and automotive infotainment head units |
Applications
| Live Sound Mixing Console Input Stage | Broadcast Audio Interface |
|---|---|
Use Scenario: Accepting balanced XLR inputs from microphones and line-level sources in analog summing mixers. IC Role / Device Role / Timing Role: Dual-channel differential receiver converting balanced signals to single-ended outputs for ADC sampling. Use Value: 91 dB CMRR rejects stage lighting dimmer noise and RF interference; 140 dB channel separation prevents left/right crosstalk in stereo buses. |
Use Scenario: Front-end conditioning for AES3 or analog audio inputs in OB van recorders and IP-based studio transmitters. IC Role / Device Role / Timing Role: High-fidelity line receiver providing clean, low-distortion signal path before digital encoding. Use Value: –120 dB THD+N ensures transparent capture of dynamic program material; 2.7 MHz bandwidth accommodates ultrasonic content in high-res audio workflows. |
| High-End Home Theater Receiver | Professional Audio Analyzer |
Use Scenario: Input stage for multichannel analog audio inputs (e.g., 7.1 preamp section) in premium AV receivers. IC Role / Device Role / Timing Role: Dual-channel line receiver per input pair, supporting both balanced and unbalanced source configurations. Use Value: VMID(OUT) simplifies single-supply design for cost-sensitive consumer platforms; ±2.25 V min supply enables low-power standby modes. |
Use Scenario: Precision signal acquisition front-end in benchtop audio analyzers measuring THD+N, IMD, and frequency response. IC Role / Device Role / Timing Role: Reference-grade differential receiver feeding calibrated ADC stages with minimal added distortion. Use Value: Ultra-low 4.5 µVRMS output noise (20 Hz–20 kHz) ensures analyzer self-noise floor does not mask DUT performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio line receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA1651IPW | Single-channel version; identical electrical specs but half quiescent current (6 mA vs. 10.5 mA) and no channel B pins. | Suitable only for mono or sequential dual-channel implementations; requires two devices for stereo vs. one INA1650IPW. | Select when board space permits duplication or channel count is variable; avoids unused channel overhead. |
| PGA2500IDR | Programmable-gain instrumentation amplifier; 100 dB CMRR, 1.5 MHz bandwidth, higher THD+N (–105 dB). | Supports gain adjustment (1× to 100×); lacks VMID(OUT) and integrated EMI filters; requires external reference. | Choose when variable gain is required pre-ADC; accept trade-off in CMRR, noise, and layout complexity. |
Compared with INA1651IPW and PGA2500IDR, the INA1650IPW uniquely combines dual-channel integration, industry-leading 91 dB CMRR with production-tested consistency, and a self-contained mid-supply reference - reducing BOM count and layout risk in fixed-gain, high-channel-count audio systems.
Availability
INA1650IPW is available at Aetrix Electronics and suitable for professional audio interfaces, broadcast equipment, and high-end home theater receivers requiring stable component supply, consistent CMRR performance across temperature, and long-term lifecycle support.
Supply support for INA1650IPW 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-fidelity audio signal conditioning and precision amplification.
The INA165x product line was engineered specifically for professional and prosumer audio applications demanding ultra-low distortion, exceptional common-mode noise immunity, and reliable operation in electrically noisy environments - from concert venues to broadcast studios.
FAQ
What is the maximum supply voltage rating for INA1650IPW?
The INA1650IPW has an absolute maximum supply voltage (VCC to VEE) of 40 V, with recommended operation from ±2.25 V to ±18 V. Exceeding ±18 V may degrade long-term reliability or trigger internal protection circuits; operation at ±18 V delivers optimal THD+N (–120 dB) and CMRR (91 dB) performance as specified in the datasheet.
How does VMID(OUT) function in single-supply configurations using INA1650IPW?
In single-supply setups, VMID(OUT) provides a precise, low-impedance (0.35 Ω), low-noise (1.56 µVRMS) reference at (VCC + VEE)/2 - used to bias REF A/B and COM A/B pins. This eliminates external op-amp references and ensures CMRR remains >82 dB, enabling clean differential-to-single-ended conversion without dual rails.
Can INA1650IPW operate with mismatched source impedances on its differential inputs?
Yes. Unlike basic difference amplifiers, the INA1650IPW uses an instrumentation topology with input buffers that isolate external source impedance mismatches from its internal 10-kΩ matched resistor network. This preserves >84 dB CMRR even with 20-Ω source mismatch - critical for real-world cable and connector variations.
What is the purpose of the VMID(IN) pin on INA1650IPW?
The VMID(IN) pin is the midpoint node of the internal 500-kΩ/500-kΩ supply divider. Connecting a 1-µF capacitor here reduces thermal and resistive noise from the divider, lowering VMID(OUT) output noise from 1.56 µVRMS to sub-µV levels - essential for ultra-low-noise audio analyzer front-ends where reference stability directly impacts measurement accuracy.
Does INA1650IPW require external EMI filtering in addition to its integrated filters?
No additional filtering is required for most applications. The INA1650IPW includes on-die EMI filters with an 80-MHz corner frequency, validated to suppress common RF sources (e.g., GSM, Wi-Fi, digital clock harmonics). Only extreme RF environments (e.g., near broadcast transmitters) may warrant supplemental ferrite beads on input lines - confirmed via system-level EMC testing.
INA1650IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Audio Receiver
- Applications:
- Audio
- Number of Channels:
- 2
- Interface:
- -
- Voltage - Supply:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
INA1650IPW FAQ
1.How can I place an order for INA1650IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for INA1650IPW 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 INA1650IPW reliable?
The price and inventory of INA1650IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA1650IPW is usually 5 days.
3.What payment methods are accepted for INA1650IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA1650IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA1650IPW?
INA1650IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA1650IPW 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 INA1650IPW?
For technical support, including INA1650IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA1650IPW requirements.
6.How does Aetrix verify that INA1650IPW is sourced from the original manufacturer or authorized distributors?
All INA1650IPW 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 INA1650IPW meets industry standards.
7.What is the process for return or replacement of INA1650IPW?
All INA1650IPW units undergo pre-shipment inspection (PSI). If there is an issue with INA1650IPW, 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 INA1650IPW part is unused and in its original packaging.
Return procedure for INA1650IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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