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Texas Instruments PGA205AUG4
- Part No.:
- PGA205AUG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PGA205AUG4.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
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Product details
Overview
PGA205AUG4 from Texas Instruments (formerly Burr-Brown) is a digitally programmable gain instrumentation amplifier with fixed binary gains of 1, 2, 4, and 8 V/V, ±40V input overvoltage protection, 50µV max input offset voltage, and operation from ±4.5V to ±18V supplies - used for precision sensor signal conditioning in data acquisition systems.
For engineers reviewing the PGA205AUG4 datasheet, PGA205AUG4 pinout, PGA205AUG4 application, or PGA205AUG4 equivalent, key selection criteria include its 80–112dB common-mode rejection across gains, 100kHz bandwidth at G=8, low 2nA max input bias current, and compatibility with TTL/CMOS logic without external supply.
Technical Context
The PGA205AUG4 integrates three op-amps (A1/A2 input stage, A3 output difference amplifier) with laser-trimmed resistive feedback networks selected via two digital address lines (A0, A1). Its architecture enables high CMRR by maintaining matched input paths and internal overvoltage protection diodes on both inputs.
Gain switching is asynchronous and immediate - no latching required - with settling time of 23µs (0.1%) at G=2. Input-referred noise is 15nV/√Hz at 100Hz and G=8; output swing is limited to (V+)–1.3V / (V–)+1.3V at ±15V supplies with 5mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | 1, 2, 4, 8 V/V - digitally selected via A0/A1; no external components needed |
| Input Offset Voltage | ±50 µV max at +25°C - enables sub-mV accuracy in low-level sensor interfaces |
| CMRR | 95 dB min at G=8 - ensures robust rejection of interference in noisy industrial environments |
| Bandwidth (–3dB) | 100 kHz at G=8 - supports dynamic signals up to ~10kHz with <0.1% gain error |
| Input Bias Current | ±2 nA max - permits use with high-impedance sources (e.g., piezoelectric sensors) |
| Supply Range | ±4.5V to ±18V - allows battery-powered (±5V) or industrial (±15V) operation |
| Overvoltage Protection | ±40V on either input - eliminates need for external clamping in harsh EMI/ESD environments |
Pinout & Package
PGA205AUG4 is packaged in a 16-pin SOIC (DW) surface-mount package with 1.27mm pitch, JEDEC MS-013 compliant, moisture sensitivity level 3, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VO1) | Output of first input amplifier (A1) | Internal node - not user-accessible; used only for internal feedback |
| 2, 3 (NC) | No internal connection | Unbonded die pads - must be left floating or grounded per layout best practice |
| 4 (V–IN) | Inverting input | Differential input terminal; accepts signals within ±12.7V common-mode range |
| 5 (V+IN) | Non-inverting input | Differential input terminal; matched impedance and protection to Pin 4 |
| 6, 7 (VOS Adj) | Offset voltage adjustment terminals | Enable fine trimming of input-stage offset; connected to external 200kΩ–1MΩ potentiometer |
| 8 (V–) | Negative power supply | Return path for analog circuitry; separate from digital ground (Pin 14) to minimize noise coupling |
| 9 (VO2) | Output of second input amplifier (A2) | Internal node - not user-accessible; used only for internal feedback |
| 10 (Ref) | Output reference | Defines output common-mode level; must be low-impedance (≤5Ω) for >80dB CMRR |
| 11 (VO) | Main output | Final amplified, gain-scaled differential output referenced to Pin 10 |
| 12 (Feedback) | Output feedback sense | Connect directly to Pin 11 for standard operation; enables remote sensing at load |
| 13 (V+) | Positive power supply | Supplies analog core; decoupling capacitor required close to this pin |
| 14 (Digital Ground) | Digital reference for A0/A1 | May be tied to system ground or V–; carries ~1.3mA current - route separately from analog ground |
| 15 (A0) | Gain select LSB | TTL/CMOS-compatible input; logic high ≥2V above Pin 14 voltage |
| 16 (A1) | Gain select MSB | TTL/CMOS-compatible input; defines gain per truth table: 00=1, 01=2, 10=4, 11=8 |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset and drift | 50µV max offset and 0.25µV/°C drift - reduces calibration burden in temperature-varying systems |
| Dual independent overvoltage protection | ±40V tolerance per input - prevents latch-up or damage during transients without external diodes |
| Single-supply logic interface | No separate VLOGIC required - A0/A1 accept 0–V+ levels referenced to Pin 14 |
| High input impedance | 1010Ω || 6pF differential - preserves signal integrity from high-Z sources like strain gauges |
| Stable with capacitive loads | 1000pF max load capacitance - supports direct driving of ADC input filters without oscillation |
Applications
| Data Acquisition Systems | Medical Instrumentation |
|---|---|
Use Scenario: Digitizing low-amplitude biopotential signals (ECG, EEG) with variable sensor output ranges. IC Role / Device Role / Timing Role: Programmable gain front-end amplifier that scales microvolt-level differential inputs to match ADC full-scale range. Use Value: Eliminates manual gain-switching hardware; maintains 112dB CMRR at G=8 to reject 50/60Hz mains interference. | Use Scenario: Signal conditioning for pressure transducers in patient monitors where output spans 10mV to 100mV. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing calibrated gain steps without recalibration. Use Value: 2nA max input bias current avoids loading high-output-impedance silicon pressure sensors. |
| Industrial Sensor Interfaces | Test & Measurement Equipment |
Use Scenario: Amplifying outputs from RTD or thermocouple bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Robust front-end with ±40V input protection handling field-wiring faults and ESD events. Use Value: Overvoltage survival enables direct connection to unconditioned field wiring - reduces BOM cost vs. discrete protection. | Use Scenario: Modular multichannel data loggers requiring consistent gain accuracy across channels. IC Role / Device Role / Timing Role: Matched-gain instrumentation amplifier enabling channel-to-channel gain matching ≤0.05% error. Use Value: Laser-trimmed gain error (±0.01% typ at G=2) minimizes post-processing correction in calibrated instruments. |
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 | Fixed gain (10–10000 V/V via single resistor); no digital control; lower quiescent current (700µA) | Requires manual resistor change for gain adjustment; unsuitable for automated gain sequencing | Select when gain is static and ultra-low power is critical; avoid when real-time gain switching is needed. |
| AD8253ARMZ | Digitally programmable (1–100 V/V in 1–2–5–10 steps); SPI interface; rail-to-rail output; higher bandwidth (3MHz at G=1) | Requires SPI clock/data lines and firmware support; supports higher-speed acquisition than PGA205AUG4 | Select for systems needing >100kHz bandwidth or SPI-based configuration; avoid if only two GPIOs are available. |
Compared with INA128UA and AD8253ARMZ, PGA205AUG4 uniquely balances simple 2-wire digital control, ±40V ruggedness, and 100kHz bandwidth at G=8 - making it optimal for cost-sensitive, medium-speed industrial DAQ where minimal GPIO count and field reliability are prioritized.
Availability
PGA205AUG4 is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, industrial sensor interfaces, and test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for PGA205AUG4 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 legacy precision analog product lines including instrumentation amplifiers, data converters, and op-amps.
The PGA205AUG4 belongs to TI's legacy programmable-gain instrumentation amplifier family, designed specifically for high-accuracy, low-drift sensor signal conditioning in industrial and medical measurement systems operating across –40°C to +85°C.
FAQ
What gain settings does the PGA205AUG4 support, and how are they selected?
The PGA205AUG4 supports four precise binary gains: 1, 2, 4, and 8 V/V. These are selected using two TTL/CMOS-compatible digital inputs - A0 (Pin 15) and A1 (Pin 16) - with no external logic supply required. The gain is set asynchronously: changing A0/A1 immediately configures the internal feedback network, and the output settles within 23µs (0.1%) at G=2. PGA205AUG4 does not support gains beyond 8 V/V, unlike the PGA204 series.
Does the PGA205AUG4 require external components for basic operation?
No, the PGA205AUG4 operates with only power supplies (±4.5V to ±18V), input signals, and digital address lines. Decoupling capacitors (e.g., 1µF ceramic near Pins 13 and 8) are strongly recommended. The Ref pin (Pin 10) must connect to a low-impedance ground (≤5Ω) to maintain CMRR; Feedback (Pin 12) must tie directly to VO (Pin 11). External offset trim is optional and only needed for sub-50µV residual error.
Can the PGA205AUG4 be used with single-supply operation?
The PGA205AUG4 requires dual supplies (±VS) for specified performance and is not characterized for true single-supply use. Its input common-mode range extends to ±12.7V, and output swing is symmetrical about Ref (Pin 10). While operation with V– = 0V and V+ = +15V may function in limited cases, parameters like CMRR, offset, and bandwidth degrade outside the specified ±4.5V to ±18V dual-supply range. For single-supply designs, consider TI's INA333 or ADI's AD8420.
How does the PGA205AUG4 handle input overvoltage conditions?
The PGA205AUG4 features integrated overvoltage protection on both inputs, rated for continuous ±40V regardless of power supply state. Internal protection diodes limit input current to ~1.5mA during overload, preventing damage without external components. This protection remains active even with no power applied. However, sustained overvoltage can cause temporary output saturation - recovery occurs within 70µs after overload removal. PGA205AUG4 does not guarantee linear operation beyond ±12.7V common-mode range.
Is the PGA205AUG4 pin-compatible with other devices in the PGA204/205 family?
Yes, PGA205AUG4 shares identical pinout and footprint with all PGA204/205 variants (e.g., PGA205AP, PGA204AU), including the 16-pin SOIC (DW) package. All share the same terminal functions, electrical interface, and PCB layout. However, gain ranges differ: PGA205AUG4 provides 1/2/4/8 V/V, while PGA204 variants offer 1/10/100/1000 V/V. Swapping between them requires verifying gain requirements and recalibrating downstream signal chains.
PGA205AUG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- 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:
- 25 µV
- Current - Supply:
- 5.2mA
- Current - Output / Channel:
- 23 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
PGA205AUG4 FAQ
1.How can I place an order for PGA205AUG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA205AUG4 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 PGA205AUG4 reliable?
The price and inventory of PGA205AUG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA205AUG4 is usually 5 days.
3.What payment methods are accepted for PGA205AUG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA205AUG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA205AUG4?
PGA205AUG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA205AUG4 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 PGA205AUG4?
For technical support, including PGA205AUG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA205AUG4 requirements.
6.How does Aetrix verify that PGA205AUG4 is sourced from the original manufacturer or authorized distributors?
All PGA205AUG4 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 PGA205AUG4 meets industry standards.
7.What is the process for return or replacement of PGA205AUG4?
All PGA205AUG4 units undergo pre-shipment inspection (PSI). If there is an issue with PGA205AUG4, 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 PGA205AUG4 part is unused and in its original packaging.
Return procedure for PGA205AUG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PGA205AUG4 Tags
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LM358DR
Texas Instruments
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LM358P
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