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Texas Instruments PGA204BPG4
- Part No.:
- PGA204BPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
PGA204BPG4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,757
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Product details
Overview
PGA204BPG4 from Texas Instruments (formerly Burr-Brown) is a digitally programmable gain instrumentation amplifier (PGIA) with four discrete gain settings (1, 10, 100, 1000 V/V), ±40V input over-voltage protection, and laser-trimmed 50µV max input offset voltage. It operates from ±4.5V to ±18V supplies and is used in precision data acquisition systems requiring high common-mode rejection (115dB at G=1000) and low drift (0.25µV/°C).
For engineers reviewing the PGA204BPG4 datasheet, PGA204BPG4 pinout, PGA204BPG4 application, or PGA204BPG4 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in medical and industrial sensing, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The PGA204BPG4 integrates three op-amps (A1, A2, A3) in a classic three-op-amp instrumentation topology with digitally switched internal 25kΩ feedback resistors. Gain selection is performed via TTL/CMOS-compatible A0 and A1 address inputs without requiring a separate logic supply.
It features dual over-voltage protection circuits on each input, enabling safe operation up to ±40V even with no power applied. The output is referenced to the Ref pin, and the Feedback pin (12) must be connected directly to VO (11) for standard operation - enabling remote-sense capability when routed to the load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | 1, 10, 100, 1000 V/V - digitally selected via A0/A1; no external resistors needed. |
| Input Offset Voltage | ±50 µV max (RTI, TA = +25°C) - enables sub-0.01% accuracy in 10mV full-scale sensor interfaces. |
| CMRR | 115 dB at G=1000 (VCM = ±10V, ∆RS = 1kΩ) - critical for rejecting noise in bridge-based strain gauge or thermocouple measurements. |
| Bandwidth (–3dB) | 1 kHz at G=1000; 1 MHz at G=1 - supports DC-coupled precision measurement and moderate-speed signal conditioning. |
| Supply Range | ±4.5V to ±18V - allows battery-powered (±5V) or industrial rail (±15V) deployment without level-shifting. |
| Input Protection | ±40V absolute max on either input - eliminates need for external clamping diodes in harsh EMI/ESD environments. |
| Quiescent Current | ±6.5 mA max (TA = –40°C to +85°C) - enables thermal-aware design in enclosed industrial enclosures. |
Pinout & Package
PGA204BPG4 is housed in a 16-pin plastic DIP (PDIP-N) package with 0.300" wide body and through-hole mounting. Pin spacing is 0.100", compatible with standard 0.1" pitch PCB footprints and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VO1) | Output of first input stage (A1) | Internal node; not user-accessible - used only for internal feedback and overload detection. |
| 2, 3 (NC) | No internal connection | Unbonded die pads; must remain unconnected per datasheet. |
| 4 (V–IN) | Inverting input of instrumentation amplifier | Differential input terminal; accepts signals within ±12.7V common-mode range at G=1. |
| 5 (V+IN) | Non-inverting input of instrumentation amplifier | Differential input terminal; paired with V–IN for true differential sensing. |
| 6, 7 (VOS Adj) | Input offset voltage trim terminals | Laser-trimmed; external 200kΩ–1MΩ potentiometer connects between pins to null input-stage offset. |
| 8 (V–) | Negative power supply rail | Must be decoupled locally with ≥1µF capacitor; return path for digital ground current must be separated. |
| 9 (VO2) | Output of second input stage (A2) | Internal node; not user-accessible - used only for internal feedback and overload detection. |
| 10 (Ref) | Output reference terminal | Defines output common-mode level; must be low-impedance (<5Ω) to maintain CMRR >100dB. |
| 11 (VO) | Main output terminal | Amplified output: VO = G × (V+IN – V–IN) + VREF; drives loads down to 2kΩ. |
| 12 (Feedback) | Output feedback sense point | Must connect directly to VO (pin 11); enables Kelvin-sense configuration when routed to load. |
| 13 (V+) | Positive power supply rail | Must be decoupled locally with ≥1µF capacitor; supplies all internal amplifiers and protection circuitry. |
| 14 (Digital Ground) | Digital reference for A0/A1 logic | May be tied to analog ground or V–; carries ~1.3mA current - requires dedicated low-impedance return path. |
| 15 (A0) | LSB gain select input | TTL/CMOS-compatible; logic high > VDG + 2V; controls resistor network switching with <1µs propagation delay. |
| 16 (A1) | MSB gain select input | TTL/CMOS-compatible; logic high > VDG + 2V; together with A0 selects one of four gain states. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable gain | Four precise, factory-laser-trimmed gains (1/10/100/1000) eliminate manual resistor selection and layout variation. |
| Integrated over-voltage protection | Withstands ±40V on either input - protects against transients, miswiring, and ESD without external components. |
| Low-drift offset voltage | 0.25µV/°C max drift ensures stable calibration over industrial temperature range (–40°C to +85°C). |
| No logic supply required | Digital interface powered from analog rails - simplifies power architecture and avoids level-shifter ICs. |
| High common-mode rejection | 115dB at G=1000 enables accurate extraction of µV-level signals from noisy 10V common-mode backgrounds. |
Applications
| Medical Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Amplifying low-level biopotential signals (ECG, EEG) from dry electrodes subject to motion artifacts and 50/60Hz interference. IC Role / Device Role / Timing Role: Primary front-end PGIA providing programmable gain and high CMRR before ADC sampling. Use Value: Enables single-device support for multiple sensor types (e.g., 1× for high-output EMG, 100× for microvolt EEG) without hardware change. |
Use Scenario: Conditioning outputs from multi-channel strain gauge bridges in structural health monitoring systems. IC Role / Device Role / Timing Role: Precision signal conditioner with programmable gain per channel to normalize varying bridge sensitivities. Use Value: Eliminates per-channel calibration offsets; ±40V input tolerance prevents damage during field wiring checks. |
| Industrial Process Control | Test & Measurement Equipment |
|
Use Scenario: Isolating and scaling 4–20mA loop signals with HART modulation in hazardous-area transmitters. IC Role / Device Role / Timing Role: Input-stage amplifier with galvanically isolated Ref and Feedback paths for noise immunity. Use Value: Maintains >100dB CMRR across temperature while supporting both DC and AC-coupled HART signal recovery. |
Use Scenario: Building modular, auto-ranging benchtop multimeters with 6½-digit resolution. IC Role / Device Role / Timing Role: Programmable gain front-end that sets full-scale range before precision SAR ADC digitization. Use Value: Settling time of 1000µs at G=1000 meets 0.01% accuracy requirements for 100ms measurement cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable-gain instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA128UA | Analog gain set via external resistor (no digital control); fixed G=1000 max; 125µV offset; no ±40V input protection. | Requires manual gain reconfiguration; unsuitable for automated multi-range systems or high-transient environments. | Select when digital control is unnecessary and lowest possible cost per channel is prioritized over flexibility. |
| AD8253ARMZ | True rail-to-rail output; SPI interface; G=1/10/100/1000; 60µV offset; ±20V input rating; requires 2.7–5.5V logic supply. | Needs external logic supply and SPI controller; superior bandwidth (10MHz at G=1) but lower input voltage tolerance. | Select when system already includes SPI infrastructure and requires faster settling or rail-to-rail output swing. |
Compared with INA128UA and AD8253ARMZ, PGA204BPG4 uniquely combines TTL/CMOS-compatible digital gain control, ±40V input ruggedness, and laser-trimmed low-drift performance in a single-supply-compatible DIP package - making it optimal for legacy industrial DAQ upgrades and medical OEM designs where reliability and simplicity are paramount.
Availability
PGA204BPG4 is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and test & measurement equipment requiring stable component supply across extended product lifecycles.
Supply support for PGA204BPG4 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 acquired Burr-Brown in 2000 and maintains full production, qualification, and support for legacy precision analog products including the PGA204 series.
The PGA204 product line was designed specifically for high-accuracy, low-drift, digitally configurable signal conditioning in data acquisition and sensor interface applications - emphasizing robustness, ease of use, and long-term manufacturability.
FAQ
What gain settings does the PGA204BPG4 support?
The PGA204BPG4 supports four discrete, factory-programmed gain settings: 1 V/V, 10 V/V, 100 V/V, and 1000 V/V. These are selected using the A0 and A1 digital inputs per the truth table in the datasheet. Unlike variable-gain amplifiers, PGA204BPG4 does not support intermediate or analog-adjusted gains - each setting is laser-trimmed for precision and stability. This ensures repeatable performance across temperature and time without recalibration.
Does PGA204BPG4 require a separate logic supply voltage?
No, PGA204BPG4 does not require a separate logic supply. Its A0 and A1 inputs are TTL/CMOS-compatible and operate directly from the analog power rails: logic high is defined as any voltage greater than VDG + 2V, where VDG (digital ground, pin 14) can be tied to V– or system ground. This eliminates the need for level shifters or auxiliary supplies - simplifying board design and reducing component count in battery-powered or isolated systems.
Can PGA204BPG4 operate with single-supply voltages?
PGA204BPG4 is specified for dual-supply operation (±4.5V to ±18V), but it can be used in single-supply configurations with appropriate biasing. For example, connecting V– to 0V and V+ to +15V requires referencing the Ref pin to a mid-supply voltage (e.g., +7.5V) and ensuring input signals remain within the common-mode range (±10.5V at VO = 0V). The PGA204BPG4 datasheet provides guidance on single-supply implementation, including output swing limitations and offset adjustment considerations.
How is input offset voltage trimmed on PGA204BPG4?
PGA204BPG4 provides two dedicated VOS Adj pins (6 and 7) for trimming input-stage offset. To calibrate, configure PGA204BPG4 at its highest gain (G=1000), short both inputs, and adjust an external 200kΩ–1MΩ potentiometer connected across pins 6 and 7 until VO = 0V. This procedure nulls the dominant input-stage offset while preserving low drift. Output-stage offset may be trimmed separately at G=1 using the Ref pin, but interaction between adjustments requires iterative tuning for PGA204BPG4.
What is the maximum safe input voltage for PGA204BPG4?
The absolute maximum safe input voltage for PGA204BPG4 is ±40V on either input terminal - even with no power applied. This is enabled by integrated over-voltage protection circuitry on each input. However, linear operation is limited to ±12.7V common-mode range (at VO = 0V) and depends on gain and output swing. Exceeding the linear range causes saturation of internal amplifiers A1 or A2, potentially producing misleading near-zero outputs despite large differential inputs - so proper input range planning remains essential for accuracy.
PGA204BPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.7V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 5.2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
PGA204BPG4 FAQ
1.How can I place an order for PGA204BPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA204BPG4 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 PGA204BPG4 reliable?
The price and inventory of PGA204BPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA204BPG4 is usually 5 days.
3.What payment methods are accepted for PGA204BPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA204BPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA204BPG4?
PGA204BPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA204BPG4 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 PGA204BPG4?
For technical support, including PGA204BPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA204BPG4 requirements.
6.How does Aetrix verify that PGA204BPG4 is sourced from the original manufacturer or authorized distributors?
All PGA204BPG4 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 PGA204BPG4 meets industry standards.
7.What is the process for return or replacement of PGA204BPG4?
All PGA204BPG4 units undergo pre-shipment inspection (PSI). If there is an issue with PGA204BPG4, 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 PGA204BPG4 part is unused and in its original packaging.
Return procedure for PGA204BPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PGA204BPG4 Tags
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LM358DR
Texas Instruments
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LM358P
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