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Texas Instruments PGA103UG4
- Part No.:
- PGA103UG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PGA103UG4.pdf
- Description:
- IC OPAMP PGA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
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Product details
Overview
PGA103UG4 from Texas Instruments (formerly Burr-Brown) is a precision programmable-gain amplifier (PGA) with digitally selectable gains of 1, 10, and 100 V/V, designed for wide-dynamic-range analog signal conditioning in data acquisition systems. It features ±0.05% max gain error at G=10, 250 kHz bandwidth at G=100, low 2 µV/°C offset drift, and operates from ±4.5 V to ±18 V supplies in SO-8 package.
For engineers reviewing the PGA103UG4 datasheet, PGA103UG4 pinout, PGA103UG4 application, or PGA103UG4 equivalent, this device is evaluated for high-accuracy gain switching in medical instrumentation, industrial sensor interfaces, and general-purpose analog boards where stable gain accuracy, low noise, and CMOS/TTL-compatible digital control are required.
Technical Context
The PGA103UG4 implements a monolithic, laser-trimmed architecture with three fixed gain paths selected by two non-latched digital inputs (A0, A1), referenced to the ground pin (Pin 3). Gain selection is immediate, with logic thresholds defined relative to Pin 3 (0.8 V max for logic low, ≥2 V for logic high).
Its internal topology supports true instrumentation-grade input referencing, with input-referred offset voltage trimmed to ±100 µV typical at G=10 and G=100, and input impedance of 10⁸ Ω || 2 pF. Settling time is specified at 8 µs to 0.01% for G=100, enabling fast multiplexed channel acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | 1, 10, 100 V/V - fixed-ratio, digitally selected via two logic inputs; no invalid states except "11" (undefined output) |
| Gain Error (G=10) | ±0.05% max - ensures <0.5 mV error on 1 V input, critical for calibrated measurement front-ends |
| Bandwidth (G=100) | 250 kHz - supports >100 kSPS sampling of conditioned signals without aliasing in DAQ systems |
| Input Offset Drift | 2 µV/°C - limits thermal-induced gain error to <0.2% over 85°C range at G=100 |
| Quiescent Current | ±2.6 mA - enables low-power operation while maintaining 9 V/µs slew rate and fast settling |
| Supply Range | ±4.5 V to ±18 V - accommodates legacy ±5 V, ±12 V, and ±15 V analog rails without level-shifting |
| Operating Temp | –40°C to +85°C - qualified for industrial and medical environments per datasheet specification |
Pinout & Package
PGA103UG4 is housed in an 8-pin SOIC (SO-8) surface-mount package (TI package code D), with standard 1.27 mm pitch and JEDEC MS-012AC dimensions (4.9 mm × 3.9 mm × 1.75 mm). Thermal resistance θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive supply rail | Connects to +VS; must be decoupled locally (0.1 µF ceramic) to minimize PSRR degradation |
| 2 (VO) | Analog output | Low-impedance buffered output; drives up to 2 kΩ load or ≤1000 pF capacitive load |
| 3 (GND) | Analog ground reference | Low-impedance connection required; >0.1 Ω series resistance degrades G=100 gain accuracy by >0.2% |
| 4 (NC) | No connection | Internally unconnected; leave floating or tie to ground only if PCB layout requires mechanical stability |
| 5 (A0) | Digital gain select bit 0 | CMOS/TTL-compatible input; logic level referenced to Pin 3; controls LSB of gain code (00=1, 01=10, 10=100) |
| 6 (A1) | Digital gain select bit 1 | CMOS/TTL-compatible input; logic level referenced to Pin 3; controls MSB of gain code |
| 7 (V–) | Negative supply rail | Connects to –VS; symmetric decoupling required for optimal common-mode rejection |
| 8 (VIN) | Differential input (inverting not used) | Single-ended input referenced to Pin 3; input impedance 10⁸ Ω || 2 pF; accepts ±12 V max per absolute ratings |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain accuracy | ±0.05% max at G=10 ensures calibrated gain without external trimming in production test |
| Low input offset drift | 2 µV/°C enables stable DC-coupled measurements across industrial temperature ranges |
| Fast settling at high gain | 8 µs to 0.01% at G=100 allows high-throughput multiplexed sensor scanning at >100 kSPS |
| CMOS/TTL-compatible logic interface | Direct connection to microcontrollers or FPGAs without level shifters or pull-up resistors (except for open-switch cases) |
| Wide supply flexibility | ±4.5 V to ±18 V operation supports both low-voltage portable and high-voltage industrial analog backplanes |
Applications
| Medical ECG Signal Conditioning | Industrial Sensor Interface Module |
|---|---|
Use Scenario: Amplifying low-amplitude, high-impedance biopotential signals (e.g., ECG leads) with variable gain to accommodate patient-specific signal levels. IC Role / Device Role / Timing Role: Programmable gain stage before ADC; gain dynamically adjusted per lead or patient profile. Use Value: Enables single-channel hardware to handle ±1 mV to ±100 mV input ranges without manual gain switches or recalibration. |
Use Scenario: Conditioning outputs from strain gauges, RTDs, or thermocouples in PLC analog input modules. IC Role / Device Role / Timing Role: Front-end gain selector in multi-sensor data acquisition; gain set during configuration or runtime via controller GPIO. Use Value: Reduces need for multiple fixed-gain op-amp variants in BOM, simplifying inventory and board design across sensor types. |
| Automated Test Equipment (ATE) Channel Card | Portable Data Logger Front-End |
Use Scenario: High-speed, multi-channel voltage measurement in benchtop ATE where dynamic range exceeds ADC resolution. IC Role / Device Role / Timing Role: Precision gain element synchronized with multiplexer and ADC sampling clock. Use Value: Achieves >100 dB effective dynamic range using 16-bit ADC by scaling input to full-scale before conversion. |
Use Scenario: Battery-powered environmental monitoring node acquiring signals from pH, dissolved oxygen, or conductivity sensors. IC Role / Device Role / Timing Role: Low-quiescent-current programmable gain amplifier enabling extended battery life without sacrificing measurement fidelity. Use Value: Delivers 250 kHz bandwidth and 2.6 mA total supply current-enabling real-time spectral analysis while sustaining >1-year operation on AA cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA118P | Fixed G=10, 100, 500; no digital control; higher precision (±0.002% gain error), lower noise (1 nV/√Hz) | Requires external logic or DAC to switch gain; better for static-gain, ultra-low-noise lab equipment | Select when ultimate DC accuracy and noise performance outweigh need for digital gain control. |
| AD8253ARMZ | G=1, 10, 100, 1000; SPI interface; rail-to-rail output; higher supply current (4.5 mA); integrated reference buffer | Supports daisy-chained digital control and simultaneous gain updates across multiple channels | Select when system uses SPI bus, requires >1000× gain, or needs rail-to-rail output swing in single-supply designs. |
Compared with INA118P and AD8253ARMZ, the PGA103UG4 offers the optimal balance of digital simplicity (2-pin TTL control), low quiescent power (2.6 mA), and proven industrial reliability in SO-8 packaging-making it ideal for cost-sensitive, medium-precision, multi-channel DAQ where minimal GPIO usage and supply headroom are priorities.
Availability
PGA103UG4 is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for PGA103UG4 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 (TI) is a global semiconductor leader delivering analog and embedded processing solutions, with deep heritage in precision amplifiers dating to Burr-Brown's acquisition in 2000.
The PGA103UG4 belongs to TI's legacy precision programmable-gain amplifier product line, engineered for high-accuracy, wide-dynamic-range analog signal conditioning in data acquisition, instrumentation, and industrial control systems.
FAQ
What gain settings does the PGA103UG4 support, and how are they selected?
The PGA103UG4 supports three discrete gain settings: 1 V/V, 10 V/V, and 100 V/V. These are selected using two CMOS/TTL-compatible digital inputs-A0 (Pin 5) and A1 (Pin 6)-with valid logic combinations of "00", "01", and "10". The "11" state is undefined and must be avoided. Gain changes occur immediately upon input transition, with settling completed within 8 µs at G=100.
Does the PGA103UG4 require external components for basic operation?
Yes-the PGA103UG4 requires local 0.1 µF ceramic decoupling capacitors on both V+ (Pin 1) and V– (Pin 7), connected directly to the ground plane (Pin 3). A low-impedance ground connection (<0.1 Ω) is mandatory to maintain gain accuracy, especially at G=100. No external resistors or trim pots are needed for nominal operation, though offset trimming is supported via Pin 3 if required.
What is the maximum input voltage range for the PGA103UG4?
The PGA103UG4 analog input (Pin 8) is specified for operation between V– and V+, i.e., ±4.5 V to ±18 V rails. Absolute maximum input voltage is limited to the supply rails per datasheet (V– ≤ VIN ≤ V+). For overvoltage protection beyond rails, external clamping diodes (e.g., IN4148) are recommended-as shown in Figure 5 of the PGA103UG4 datasheet-for applications accepting inputs up to ±120 V.
Is the PGA103UG4 pin-compatible with other PGA103 variants like PGA103P?
No-the PGA103UG4 (SO-8) and PGA103P (8-pin plastic DIP) share identical electrical functionality and pinout numbering, but differ in physical package, thermal characteristics (θJA = 100°C/W for SO-8 vs. 120°C/W for DIP), and reflow compatibility. They are not mechanically interchangeable; PCB layout and assembly processes must match the specific package variant ordered.
How does the PGA103UG4 handle power supply rejection at high gain?
The PGA103UG4 maintains strong power supply rejection (PSR) across its operating frequency range: >80 dB at 100 Hz and >60 dB at 10 kHz for all gains (G=1, 10, 100), as verified in the "Power Supply Rejection vs Frequency" curve. This performance ensures minimal coupling of supply ripple into the amplified signal-even at G=100-when properly decoupled with 0.1 µF ceramics near Pins 1 and 7.
PGA103UG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 9V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 2.6mA
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
PGA103UG4 FAQ
1.How can I place an order for PGA103UG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA103UG4 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 PGA103UG4 reliable?
The price and inventory of PGA103UG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA103UG4 is usually 5 days.
3.What payment methods are accepted for PGA103UG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA103UG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA103UG4?
PGA103UG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA103UG4 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 PGA103UG4?
For technical support, including PGA103UG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA103UG4 requirements.
6.How does Aetrix verify that PGA103UG4 is sourced from the original manufacturer or authorized distributors?
All PGA103UG4 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 PGA103UG4 meets industry standards.
7.What is the process for return or replacement of PGA103UG4?
All PGA103UG4 units undergo pre-shipment inspection (PSI). If there is an issue with PGA103UG4, 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 PGA103UG4 part is unused and in its original packaging.
Return procedure for PGA103UG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PGA103UG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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