REF102AP - 10V Precision Voltage Reference 2.5ppm/C | TI
N.º da peça: REF102AP ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.56 | $2,56 |
| 10 | $2.36 | $23,60 |
| 100 | $2.12 | $212,00 |
| 500 | $1.93 | $965,00 |
| 1.000 | $1.78 | $1.780,00 |
REF102AP Visão geral
A precision series voltage reference is a type of shunt-free, three-terminal reference circuit that maintains a highly stable output voltage independent of input supply variations, load changes, and temperature. It sits within the broader hierarchy of voltage reference ICs under power management semiconductors and serves as the accuracy anchor for data converters, instrumentation amplifiers, and metrology circuits. Unlike bandgap references, the REF102 achieves its precision using a buried Zener reference without an internal heater, delivering lab-grade stability in a standard through-hole package.
Key features include a very low drift of 2.5 ppm per degree Celsius maximum over the industrial temperature range (A grade), excellent long-term stability of 5 ppm per 1000 hours typical, outstanding line regulation of 1 ppm/V maximum, and load regulation of 10 ppm per mA maximum. Output noise is a low 5 uVpp typical at 10 Hz, and the wide supply range extends up to 36 V DC, giving designers generous headroom above the 10 V output.
Technically, the REF102 uses a laser-trimmed Zener-based architecture. Laser trimming at wafer level establishes the 10 V output and the tight drift specification without ovens or chopper stabilization, so warm-up time and power consumption are minimal compared with heater-stabilized references. This makes the part well suited for systems that must be accurate immediately after power-up.
Typical applications include A/D and D/A converter reference inputs in data acquisition systems, precision instrumentation and calibration equipment, test and measurement front ends, and transducer excitation where a stable 10 V source directly sets system gain accuracy.
When designing with the REF102AP, allow adequate supply headroom and add bypass capacitance close to the input and output pins; series references oscillate with poor decoupling or capacitive loading at the output.
This page synthesizes distributor pricing, drop-in same-family alternatives, design notes, and an A/D-converter-focused application guide not found in the manufacturer datasheet.
Alternativas drop-in para REF102AP — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
REF102BP
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
REF102CP
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
REF102AP Classificações máximas e características elétricas
| Reference Type | Series Voltage Reference |
| Tensão de saída | 10 V fixed |
| Initial Accuracy | +/-0.1% (+/-2.5 mV) |
| Temperature Drift | 2.5 ppm/C max (A grade) |
| Output Current | 10 mA |
| Line Regulation | 1 ppm/V max |
| Load Regulation | 10 ppm/mA max |
| Ruído de saída | 5 uVpp typ (10 Hz) |
| Long-Term Stability | 5 ppm/1000 hr typ |
| Supply Voltage Range | Up to 36 V DC |
| Architecture | Laser-trimmed Zener, no heater |
| Encapsulamento | 8-PDIP (DIP-8), through-hole |
| Tipo de montagem | Through Hole |
| Number of Terminals | 8 |
| Output Trim | Trim pin provided |
Guia de Configuração de Pinos do REF102AP 8-pdip (dip-8), through-hole
Configuração de pinos para REF102AP (pacote 8-pdip (dip-8), through-hole). Este dispositivo de potência possui terminais de gate, drain e source. Para pacotes não polarizados, consulte o datasheet do fabricante para a orientação exata do pino 1 e detalhes do footprint. Aplicações comuns incluem projeto de fontes de alimentação, acionamento de motores e comutação de cargas.
Nenhum dado detalhado de pinagem disponível para REF102AP.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
REF102AP é adequado para 6 aplicaçãos: 16-bit A/D Converter Reference, Precision Instrumentation and Calibration, Test and Measurement Equipment, Transducer Excitation and Bridge Sensors, Industrial Data Acquisition Systems, D/A Converter Offset and Gain Reference.
16-bit A/D Converter Reference
The REF102AP is purpose-built as the reference for A/D and D/A converters, and its parameter set aligns directly with 16-bit system requirements. Its 2.5 ppm per degree Celsius maximum drift means reference error stays below one 16-bit LSB (approximately 15 ppm of full scale) across moderate temperature excursions, and the 5 uVpp typical low-frequency noise preserves the converter's dynamic range floor. Place the REF102AP output close to the converter's REF pin with 0.1 uF and 10 uF decoupling, and buffer the reference if the converter draws dynamic reference current. Unlike bandgap parts, the laser-trimmed Zener core needs no warm-up heater, so accuracy is available immediately at power-up, a key benefit in multiplexed data acquisition systems where each channel is converted seconds after enable.
Recomendado
Precision Instrumentation and Calibration
Bench instruments, calibrators, and sensor-conditioning front ends need a voltage standard whose error does not dominate the measurement chain, and the REF102AP fits this role with a plus or minus 0.1 percent initial accuracy that is trimmable via the TRIM pin for even tighter set points. The 1 ppm/V maximum line regulation lets the reference ride an unregulated supply, and the 10 ppm/mA load regulation holds accuracy as load varies across instrument ranges. Long-term stability of 5 ppm per 1000 hours typical reduces recalibration intervals, an important cost factor in calibration labs. Designers should mount the device away from heat sources and use a stable trim potentiometer, since external trim-network drift can exceed the reference's own 2.5 ppm per degree Celsius specification.
Recomendado
Test and Measurement Equipment
In DMMs, source-measure units, and automated test fixtures, the REF102AP provides a stable 10 V rail from which divider networks derive lower ranges, so one reference sets accuracy for the whole instrument. The wide supply range up to 36 V DC allows operation directly from bench supplies without a pre-regulator, and 10 mA output capacity drives reference dividers and LED bar-graph range indicators without an external buffer. Because the die uses a Zener reference without a heater, thermal gradients inside the instrument case have minimal effect, unlike ovenized references that consume hundreds of milliwatts. Layout should use a star ground at the reference output to prevent load-return currents from modulating the reference node in multi-range designs.
Recomendado
Transducer Excitation and Bridge Sensors
Bridge sensors such as load cells and RTD circuits derive their full-scale output from the excitation voltage, so excitation drift maps directly into reading error. A 10 V REF102AP excitation with 2.5 ppm per degree Celsius drift keeps ratiometric errors negligible compared with the sensor's own specifications, and the plus or minus 0.1 percent initial accuracy simplifies factory scaling. Ratiometric configuration - using the same reference for excitation and the ADC - cancels residual drift altogether. With 10 mA available, small 350-ohm bridges can be driven directly; larger loads need a buffer stage. Ensure the bridge supply return does not share the reference ground trace, or load-regulation coupling of 10 ppm per mA will appear as reading shift with bridge resistance changes.
Recomendado
Industrial Data Acquisition Systems
Factory data loggers and PLC analog modules operate over wide ambient swings where reference drift dominates total error. The REF102AP's 2.5 ppm per degree Celsius maximum drift over the industrial range yields roughly 150 ppm total drift over a 60 degree Celsius span - about 10 LSBs at 16 bits but under one LSB at 12 bits, making it an excellent reference for 12-bit industrial inputs, while the AP grade still supports 14-bit designs. Its through-hole PDIP package suits industrial boards where solderability and field replacement matter more than height. Because line regulation is only 1 ppm per volt maximum, the reference tolerates noisy 24 V-derived supplies with simple RC filtering, and the wide 36 V supply ceiling adds protection margin against transients.
Recomendado
D/A Converter Offset and Gain Reference
Precision DAC output stages use the reference both as the DAC's span-setting input and, via dividers, as the offset nulling source, so reference stability defines both endpoints of the transfer function. The REF102AP's 5 ppm per 1000 hours typical long-term stability keeps gain calibration valid between annual calibrations, and its 5 uVpp noise keeps output glitches from reference noise below typical 16-bit DAC code noise. The 10 mA output covers the DAC reference input plus an offset network without buffering in most designs. Use the TRIM pin at board calibration to null span error against a standard, then lock the trim; laser-trimmed initial accuracy of plus or minus 0.1 percent typically leaves less than 1/2 LSB residual at 12-bit span.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para REF102AP — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | REF102BP | REF102CP |
|---|---|---|---|
| Package | 8-PDIP (DIP-8) | 8-PDIP (DIP-8) - same | 8-PDIP (DIP-8) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage | 10 V fixed | 10 V fixed | 10 V fixed |
| Temperature Drift | 2.5 ppm/C max | 5 ppm/C max (B grade) | 25 ppm/C max (C grade) |
| Initial Accuracy | +/-0.1% | +/-0.1% | +/-0.2% |
| Output Current | 10 mA | 10 mA | 10 mA |
| Line Regulation | 1 ppm/V max | 1 ppm/V max | 1 ppm/V max |
| Relative Cost | High (best grade) | Medium | Lowest |
Principais diferenciais
- Best-in-family drift grade (vs REF102BP)
- Heater-free precision architecture (vs REF102CP)
- Trim pin enables field calibration (vs REF102BP)
Notas de projeto
Place 0.1 uF ceramic bypass capacitors directly at the REF102AP input and output pins, with a 10 uF bulk capacitor nearby on the input. Series references can oscillate with poor decoupling, and large capacitive loads on the output can destabilize the loop - check the datasheet capacitive-load guidance before adding reservoir capacitors. Keep the reference output trace short and route it as a star from the reference pin to the converter reference input, not as a shared power bus.
External trim drift often exceeds the reference's own 2.5 ppm per degree Celsius specification. When using the TRIM pin, choose a low-TC wirewound or metal-film potentiometer and stable resistors; alternatively skip trimming entirely and rely on the laser-trimmed plus or minus 0.1 percent initial accuracy, calibrating span in firmware instead. Also ensure load current stays below the 10 mA rating - pulling more current raises load-regulation error at 10 ppm per mA and can pull the output out of spec.
Estimated: at VIN = 15 V, VOUT = 10 V, and 1 mA load, power dissipation is (15 V - 10 V) x 1 mA = 5 mW, producing negligible self-heating drift in the PDIP package. Avoid placing the reference near hot components such as regulators or power resistors - a local temperature rise of 10 degrees Celsius shifts the output by up to 25 ppm (2.5 ppm/C), which is a full 16-bit LSB. Physical separation and airflow are the primary thermal design actions for this part.
Informações de conformidade
Compliance status not stated in provided web data - verify RoHS/REACH status on the TI product page for the specific PDIP orderable before procurement.
