AD8250ARMZ - 10MHz iCMOS PGIA, G=1/2/5/10 | Analog Devices
N.º da peça: AD8250ARMZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $11.18 | $11,18 |
| 10 | $9.96 | $99,60 |
| 100 | $8.72 | $872,00 |
| 500 | $7.96 | $3.980,00 |
| 1.000 | $7.21 | $7.210,00 |
AD8250ARMZ Visão geral
An instrumentation amplifier (INA / PGIA) is a closed-loop gain block that combines high common-mode rejection (CMRR), high input impedance, and a single-resistor-programmable differential gain. PGIA variants add a digital interface to switch gain on the fly, which lets one analog front-end handle widely varying sensor signals (thermocouples, strain gauges, shunt resistors, biopotential electrodes) without an external mechanical relay or analog switch network. The AD8250 occupies the mid-bandwidth, low-power niche between classic three-op-amp INAs such as the AD620 and the higher-frequency AD8421 family.
Key specifications include 10 MHz small-signal bandwidth (G=1), 20 V/µs slew rate, 1.5 nV/√Hz input voltage noise density, 75 µV (max) input offset voltage, 0.5 µV/°C (max) offset drift, and a wide ±5 V to ±15 V (or 5 V to 30 V single-supply) operating range. The MSOP-10 footprint consumes roughly 60% less board area than an SOIC-8 INA, while parallel digital gain-select inputs simplify FPGA/MCU control. Quiescent current is typically 4.5 mA on ±15 V supplies.
Architecturally, the AD8250 uses Analog Devices' iCMOS process, which combines high-voltage bipolar transistors on a sub-micron CMOS wafer to deliver wide supply range and low power without sacrificing ESD/EMC robustness. The topology is a classic three-op-amp INA, but the feedback resistors are switched by matched MOSFET networks rather than mechanical relays, eliminating glitch-free concerns of electromechanical switching. Internal overdrive protection prevents damage when the input exceeds the supply rails by up to ±25 V.
Typical applications include industrial process control front-ends, weigh scales and load-cell amplifiers, ECG and biopotential signal conditioning, ATE (automatic test equipment) programmable-gain stages, and wide-dynamic-range data-acquisition (DAQ) systems driving 16-/18-/24-bit ADCs such as the AD7612, AD7606, or AD7768. The transparent gain mode also supports legacy pin-strap designs without an FPGA.
When designing with the AD8250, route the gain-select logic lines away from the input traces to preserve CMRR, and use a low-impedance ground plane beneath the package. Reference-design AN-1385 demonstrates -111 dB THD at 1 kHz and 91 dB SNR when paired with the AD7612 and an ADG1209 mux, validating the part for precision DAQ.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving an engineer a single source for part selection, sourcing, and reference-design context.
Alternativas drop-in para AD8250ARMZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD8250ARMZ (mesmo formato e footprint) — diferindo em Amplifier Type, MSL Level, Package, Settling Time (0.001%), Slew Rate.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD8250ARMZ-RL
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD8251ARMZ
✅ Drop-In✓ Em estoque
$9.05 / unidade
Ver ficha técnica →AD8253ARMZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD8250ARMZ Classificações máximas e características elétricas
| Number of Channels | 1 |
| Amplifier Type | Instrumentation Amplifier (digitally programmable gain) |
| Available Gains | 1, 2, 5, 10 (digitally selected) |
| Small-Signal Bandwidth (G=1) | 10 MHz |
| Slew Rate | 20 V/µs |
| Settling Time (0.001%) | 615 ns (max) |
| Total Harmonic Distortion | -110 dB |
| Input Voltage Noise Density | 1.5 nV/√Hz |
| Input Offset Voltage (max) | 75 µV |
| Input Offset Drift (max) | 0.5 µV/°C |
| Input Impedance | GΩ |
| Supply Voltage (Dual) | ±5 V to ±15 V |
| Supply Voltage (Single) | 5 V to 30 V |
| Corrente de repouso | 4.5 mA (typ, ±15 V) |
| Temperatura de operação | -40°C to +85°C |
| Encapsulamento | 10-pin MSOP (RM-10) |
| Tipo de montagem | Surface Mount |
| Tipo de saída | Push-Pull (rail-to-rail output) |
| Nível MSL | 1 |
| Status RoHS | Compliant |
Configuração de pinos do AD8250ARMZ
| Pino 1 | RG — Gain-setting resistor / gain-select reference |
| Pino 2 | REF — Reference voltage for output (sets output common-mode level) |
| Pino 3 | IN- — Inverting input |
| Pino 4 | IN+ — Non-inverting input |
| Pino 5 | V- — Negative supply |
| Pino 6 | A0 — Gain-select logic input (LSB) |
| Pino 7 | A1 — Gain-select logic input (MSB) |
| Pino 8 | V+ — Positive supply |
| Pino 9 | VOUT — Amplifier output |
| Pino 10 | WR/Transparent — Write latch (high=latch gains) / transparent gain-mode select |
Aplicações típicas
AD8250ARMZ é adequado para 6 aplicaçãos: Industrial Process Control PLC Analog Front-End, Weigh Scale and Load Cell Amplifier, ECG and Biopotential Signal Conditioning, Automatic Test Equipment (ATE) Programmable-Gain Stage, Wide Dynamic Range Data Acquisition (DAQ) Front-End, Sensor Interface for Strain-Gauge and Pressure Transducers.
Industrial Process Control PLC Analog Front-End
The AD8250ARMZ is well matched to industrial process-control analog inputs because its 10 MHz bandwidth handles fast control loops while the four digital gains (1/2/5/10) let one PGIA replace four fixed-gain channels plus a relay mux. The GΩ input impedance does not load thermocouples or strain-gauge bridges, the ±15 V dual supply aligns with the 24 V / ±15 V PLC backplane, and the -110 dB THD keeps distortion-induced measurement error below the 16-bit ADC noise floor. The MSOP-10 footprint allows 8 channels per 50 mm PLC slot. The reference design AN-1385 shows -111 dB THD at 1 kHz and 91 dB SNR when the AD8250 is paired with the AD7612 16-bit ADC, validating it for multi-channel DAQ modules in factory-automation controllers.
Recomendado
Weigh Scale and Load Cell Amplifier
The AD8250ARMZ serves as the gain stage in a precision weigh-scale or load-cell signal chain because its 1.5 nV/√Hz input noise and 75 µV max input offset keep sub-milligram resolution achievable with a 350 Ω bridge. The 4 digital gains (1/2/5/10) cover empty/full-scale hand-off without a mechanical relay, eliminating relay bounce and contact-wear failure modes in commercial scales. The GΩ input impedance draws negligible bias current from the bridge, eliminating long-term drift caused by input-bias-induced self-heating. The MSOP-10 package is small enough for handheld kitchen or postal scales, and the -40°C to +85°C industrial range supports outdoor truck-weighing stations. Reference design circuits using AD8250 + AD7190 24-bit sigma-delta ADC are documented in CN-0135.
Recomendado
ECG and Biopotential Signal Conditioning
The AD8250ARMZ is suitable for ECG and biopotential front-ends because its 1.5 nV/√Hz input noise is below the thermal noise of skin-electrode impedance, while the GΩ input impedance does not load 10 kΩ-class electrode sources. The digital gains cover both 1 mV ECG and 100 µV EEG amplitudes from the same front-end, so one PGIA replaces multiple fixed-gain stages. With 80 dB minimum DC CMRR, the AD8250ARMZ effectively rejects 50/60 Hz common-mode mains interference when paired with right-leg-drive (RLD) circuitry. The MSOP-10 footprint is compact enough for wearable Holter monitors, and the ±5 V to ±15 V supply range accommodates both 5 V USB-powered and 12 V battery-powered patient monitors.
Recomendado
Automatic Test Equipment (ATE) Programmable-Gain Stage
The AD8250ARMZ is widely deployed in ATE pin-electronics and instrumentation channels because its 615 ns (max) settling time to 0.001% and 20 V/µs slew rate handle fast multiplexed stimulus/measurement cycles. The four digital gains let one PGIA channel cover a 100 mV to 10 V measurement range without a discrete attenuator, simplifying fixture calibration. Low 1.5 nV/√Hz noise preserves floor-accuracy on the 10 mV range, while 80 dB DC CMRR prevents ground-loop errors in bench-top ATE racks. The MSOP-10 package allows high channel density on a per-pin tester card; combined with the AD7606 16-bit, 200 kSPS simultaneous-sampling ADC, the AD8250ARMZ delivers sub-100 µs full-scale step settling for production-line functional-test.
Recomendado
Wide Dynamic Range Data Acquisition (DAQ) Front-End
The AD8250ARMZ is a strong choice for multi-channel DAQ front-ends because the four digital gains, when sequenced by an FPGA or MCU, extend the effective dynamic range of a 16- or 18-bit ADC by up to 20 dB. At 10 MHz bandwidth and -110 dB THD, the AD8250 preserves ADC SFDR even at full-scale input, important for vibration and acoustic data acquisition. The MSOP-10 footprint enables 8-16 channels per 100 mm² board, and the iCMOS process gives ±25 V input overdrive protection — surviving ESD and mis-wiring events common in field-deployed DAQ systems. Reference design CN-0301 demonstrates the AD8250ARMZ driving the AD7768 24-bit sigma-delta ADC for 110 dB dynamic-range audio-bandwidth DAQ.
Recomendado
Sensor Interface for Strain-Gauge and Pressure Transducers
The AD8250ARMZ works well in strain-gauge and pressure-transducer conditioning because its programmable 1/2/5/10 gains accommodate both low-output 1 mV/V and high-output 10 mV/V sensors without external resistor changes. The 75 µV max input offset and 0.5 µV/°C max offset drift keep total error below 0.1% over industrial -40°C to +85°C operation, meeting most aerospace and process-control transducer specs. Its GΩ input impedance eliminates bias-current-induced errors that would otherwise corrupt the bridge measurement. The MSOP-10 package permits the amplifier to be co-located with the transducer in miniature housings, while the ±5 V to ±15 V supply range allows 4-20 mA loop-powered or battery-powered implementations in wireless sensor nodes.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD8250ARMZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD8250ARMZ-RL | AD8251ARMZ | AD8253ARMZ |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | MSOP-10 | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same |
| Available Gains | 1, 2, 5, 10 | 1, 2, 5, 10 (identical) | 1, 2, 4, 8 (binary) | 1, 10, 100, 1000 (wide range) |
| Bandwidth (G=1) | 10 MHz | 10 MHz | 10 MHz | 10 MHz |
| Slew Rate | 20 V/µs | 20 V/µs | 20 V/µs | 20 V/µs |
| Input Voltage Noise | 1.5 nV/√Hz | 1.5 nV/√Hz | 1.5 nV/√Hz | 1.5 nV/√Hz |
| Input Offset Voltage (max) | 75 µV | 75 µV | 75 µV | 75 µV |
| Supply Voltage | ±5 V to ±15 V (5 V to 30 V single) | ±5 V to ±15 V | ±5 V to ±15 V | ±5 V to ±15 V |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Principais diferenciais
- Programmable digital gain without relays (vs AD8421ARMZ (fixed gain))
- Wider gain range with same MSOP-10 footprint (vs AD8251ARMZ)
- Smaller footprint than classic fixed-gain INAs (vs AD620ANZ (DIP-8))
Notas de projeto
Route the A0 and A1 gain-select lines and the WR pin away from the IN+/IN- input traces to preserve CMRR; keep digital ground return currents separated from the analog ground plane around the MSOP-10. Place a 0.1 µF X7R ceramic decoupling capacitor as close as possible to the V+ pin (pin 8), with a 10 µF bulk capacitor at the supply entry point. Use a continuous analog ground plane directly under the IC, with the exposed pad (if any) of the MSOP thermally and electrically tied to the same ground pour for lowest offset drift.
Do not leave the A0/A1 logic inputs floating — undefined levels can cause intermittent gain errors. Drive them from a CMOS logic output or pull-up/down resistors tied to V+. If operating in transparent-gain mode (WR high), the gain is set by the analog level on A0/A1 at power-up; if WR is toggled after power-up the latched gain is held, but the part will still respond to A0/A1 momentarily during the latch transition. Avoid hot-plugging inputs with common-mode voltage beyond ±25 V (overdrive spec); the internal protection clamps but sustained overdrive can degrade long-term reliability.
For maximum CMRR above 10 kHz, balance the source impedances on IN+ and IN- to within 1%; mismatched source impedance unbalances the parasitic feedback paths and degrades high-frequency common-mode rejection. Add a 10-100 Ω series resistor at each input if the source is reactive (long cable or transducer), placed within 5 mm of the IC pins. Estimated: at 10 kHz, a 100 Ω source mismatch can reduce CMRR from 80 dB to ~60 dB; the datasheet's CMRR-vs-frequency plot in the AD8250 datasheet confirms this trend.
Informações de conformidade
RoHS and lead-free status indicated by 'Z' suffix in MPN and confirmed on the ADI product page and DigiKey environmental data. Not AEC-Q100 qualified; for automotive applications, contact ADI for AEC-Q100 qualified alternatives. Halogen-free per ADI material declaration.
