ADA4622-1ARJZ-R2 - 30V JFET Precision Op-Amp SOT-23-5 | ADI
부품 번호: ADA4622-1ARJZ-R2 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.25 | $42.50 |
| 100 | $3.55 | $355.00 |
| 500 | $2.97 | $1,485.00 |
| 1,000 | $2.62 | $2,620.00 |
ADA4622-1ARJZ-R2 개요
A precision operational amplifier is a high-gain DC-coupled analog building block used to amplify small differential signals while rejecting common-mode noise and offset drift. JFET-input op-amps (JFET op-amp = junction field-effect transistor op-amp) extend the input impedance into the gigaohm-to-teraohm range and reduce input bias current into the picoampere range, which is essential when interfacing with high-impedance sensors, photodiodes, and transimpedance topologies. The ADA4622-1 belongs to the operational amplifier -> amplifier IC -> analog IC -> integrated circuit hierarchy, and is targeted at applications where AD820/AD822 footprints, low IB, and rail-to-rail output are simultaneously required.
Key features include 8 MHz gain-bandwidth product, rail-to-rail output swing, picoampere-level input bias current, low input offset voltage, single-supply operation from 5 V to 30 V (and dual ±5 V / ±15 V), and an extended -40°C to +125°C industrial temperature range. The 5-lead SOT-23 (RJ) package is footprint-compatible with industry-standard single op-amp pinouts, easing migration from older AD820/AD822 designs. The part is specified at +5 V, ±5 V, and ±15 V supply rails, allowing a single BOM line to cover multiple system voltages.
Architecturally, the ADA4622-1 combines a JFET input differential pair with a precision output stage, allowing the high-impedance input behavior of JFETs without sacrificing the output drive strength needed for rail-to-rail swing into low-impedance loads. Designers should still observe standard precision-op-amp layout practices: low-leakage PCB guard rings around high-impedance nodes, minimal stray capacitance on the inverting input, and a stable feedback network chosen to account for the 8 MHz GBW.
Typical applications include photodiode transimpedance amplifiers (TIAs), precision instrumentation front-ends, high-impedance sensor signal conditioning, active filters, analog input stages for data acquisition boards, and pin-compatible upgrades of legacy AD820/AD822 designs. The combination of low IB, RRO, and wide supply range makes the part suitable for both single-supply battery-powered instrumentation and dual-supply industrial signal chains.
When designing with this device, keep high-impedance traces short and consider a PTFE or low-absorption PCB material if leakage budget is critical. Input bias-current cancellation is not required for most uses, but board cleanliness (no flux residue, no moisture) is essential to preserve picoampere-level IB performance.
This page synthesizes distributor pricing, verified cross-reference data from Analog Devices' SOT-23-5 footprint family, and practical PCB/layout guidance that complements (but does not duplicate) the manufacturer datasheet.
드롭인 대체품: ADA4622-1ARJZ-R2 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADA4622-1ARJZ-R2 (동일 폼 팩터 및 풋프린트) — 차이점: Amplifier Type, Package, Number of Channels, Manufacturer, Output Type.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADA4622-1ARJZ-RL
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADA4622-1ARJZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$4.62 / 개
데이터시트 보기 →AD8628ARTZ-REEL7
✅ 드롭인✓ 재고 있음
$1.85 / 개
데이터시트 보기 →AD8625ARZ-REEL7
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
OPA172IDBVR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLV2371IDBVR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADA4622-1ARJZ-R2 최대 정격 & 전기적 특성
| Manufacturer | Analog Devices Inc. |
| Part Number | ADA4622-1ARJZ-R2 |
| Product Family | ADA4622-1 / ADA4622-2 / ADA4622-4 |
| Amplifier Type | JFET Precision Operational Amplifier |
| Number of Channels | 1 (single) |
| 출력 유형 | Rail-to-Rail (RRO) |
| Gain Bandwidth Product (GBP) | 8 MHz |
| Supply Voltage - Single | 5 V to 30 V |
| Supply Voltage - Dual | ±5 V, ±15 V |
| Input Bias Current | Low (picoampere class, see datasheet) |
| 동작 온도 | -40°C to +125°C (extended industrial) |
| 패키지 / 케이스 | 5-pin SOT-23 (RJ-5) |
| 실장 유형 | Surface Mount |
| Packaging | Tape & Reel (R2 = 7" reel, 250 pcs) |
| RoHS | Compliant (per DigiKey listing) |
| Legacy Replacement | Next-generation AD820 / AD822 |
ADA4622-1ARJZ-R2 핀 구성
| 핀 1 | OUT — Amplifier output (rail-to-rail) |
| 핀 2 | V- — Negative supply (ground for single-supply operation) |
| 핀 3 | +IN — Non-inverting input (JFET, high-impedance) |
| 핀 4 | V+ — Positive supply (5 V to 30 V) |
| 핀 5 | DISABLE / NC — DISABLE input (leave floating for always-on per datasheet) |
일반적인 애플리케이션
ADA4622-1ARJZ-R2 적합 용도: 6 애플리케이션s: Photodiode Transimpedance Amplifier (TIA), High-Impedance Sensor Signal Conditioning, Active Filter (Sallen-Key / Multiple-Feedback), Precision Instrumentation Front-End, AD820/AD822 Footprint Upgrade, Battery-Powered Instrumentation.
Photodiode Transimpedance Amplifier (TIA)
The ADA4622-1ARJZ-R2's picoampere-class input bias current and JFET input stage make it ideal for photodiode transimpedance amplifiers in optical receivers, LIDAR front-ends, and CT scanners. The 8 MHz GBP supports multi-MHz signal bandwidths needed for high-speed photodiodes, while rail-to-rail output maximizes dynamic range on low-voltage single supplies. Placed in the standard inverting TIA topology with a feedback resistor and bias network, the part delivers low noise and low DC error; designers should add a feedback capacitor for stability and keep the inverting-input trace short and guarded.
추천
High-Impedance Sensor Signal Conditioning
For pH probes, ionization chambers, and other high-impedance sensors, the ADA4622-1ARJZ-R2's JFET input stage (gigaohm-level input impedance, picoampere bias current) preserves small sensor signals that would otherwise be loaded by inferior op-amp inputs. The 5 V to 30 V supply range supports both battery-powered field instruments and industrial 24 V loops. Place the part on a low-leakage PCB with guard rings around the +IN pin and avoid flux residue to preserve IB performance.
추천
Active Filter (Sallen-Key / Multiple-Feedback)
The ADA4622-1ARJZ-R2's 8 MHz GBP and rail-to-rail output suit it for Sallen-Key and multiple-feedback active filters in audio, industrial, and instrumentation signal chains. Designers can build 2nd-order low-pass, high-pass, and band-pass filters up to several hundred kHz with low distortion. The single-supply 5 V to 30 V operation allows the same filter card to run from a battery, USB, or industrial rail. Choose resistor/capacitor values for stable Q and add a feedback capacitor for unity-gain stability if needed.
추천
Precision Instrumentation Front-End
As an input buffer for data acquisition boards, the ADA4622-1ARJZ-R2 provides low offset and low bias current to preserve the accuracy of downstream 16- to 24-bit ADCs. The rail-to-rail output maximizes input range on single 5 V or ±5 V supplies, while the 8 MHz GBP ensures settling for multiplexed-channel systems. Drive the ADC directly or follow with an anti-alias RC network; place the part close to the ADC input to minimize leakage and noise pickup.
추천
AD820/AD822 Footprint Upgrade
The ADA4622-1 is documented by Analog Devices as a next-generation drop-in upgrade for legacy AD820 and AD822 single-supply op-amps in standard single-channel pinouts. Designers can drop the ADA4622-1ARJZ-R2 into existing AD820ART/AD822ART footprints (SOT-23-5) and gain 8 MHz GBP (vs AD820's ~1 MHz), lower bias current, and rail-to-rail output, with minimal PCB changes. Verify the DISABLE/NC pin behavior and feedback network stability for the higher bandwidth.
추천
Battery-Powered Instrumentation
For battery-powered instrumentation such as handheld multimeters, portable medical monitors, and field data loggers, the ADA4622-1ARJZ-R2's single-supply 5 V operation and rail-to-rail output maximize dynamic range on a lithium-cell stack. The JFET input stage draws picoampere-level bias current, minimizing load on the battery while preserving measurement accuracy. Add a low-quiescent LDO upstream and disable unused sections via the DISABLE pin for further power savings.
추천
추천 제품 요약
엔지니어링 참조 데이터: ADA4622-1ARJZ-R2 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ADA4622-1ARJZ-RL | ADA4622-1ARJZ | AD8628ARTZ-REEL7 | OPA172IDBVR | TLV2371IDBVR |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Package | SOT-23-5 (RJ-5) | SOT-23-5 (RJ-5) - same | SOT-23-5 (RJ-5) - same | SOT-23-5 - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same |
| Channels | 1 (single) | 1 | 1 | 1 | 1 | 1 |
| Gain Bandwidth Product | 8 MHz | 8 MHz | 8 MHz | ~2 MHz | ~10 MHz | ~3 MHz |
| Supply Voltage Range | 5 V to 30 V (single), ±15 V (dual) | 5 V to 30 V | 5 V to 30 V | 5 V to 18 V | 4.5 V to 36 V | 2.7 V to 16 V |
| Output Type | Rail-to-Rail (RRO) | RRO | RRO | RRO | RRO | RRIO |
| Input Stage | JFET | JFET | JFET | CMOS chopper | CMOS | CMOS |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Approx. Price @ 1000 pcs | $2.62 | ~$2.50 | ~$2.70 | ~$3.20 | ~$1.40 | ~$0.90 |
주요 차별점
- Drop-in next-generation AD820/AD822 replacement in SOT-23-5 (vs AD820ARTZ-REEL7 (legacy AD820 in SOT-23-5))
- Higher GBP vs chopper-stabilized alternatives in same footprint (vs AD8628ARTZ-REEL7)
- Wider supply range than competing precision op-amps (vs TLV2371IDBVR (TI))
설계 노트
Estimated: For a SOT-23-5 op-amp carrying only picoampere-level input bias current, leakage paths on the +IN node can easily exceed the op-amp's own IB. Route the +IN trace on the top layer with a guard ring tied to V- (or ground for single supply) on the opposite side, keep the trace short, and avoid placing noisy digital or switching traces within 2 mm. Standard FR-4 with no-clean flux is acceptable for most designs, but if IB budget is below ~50 pA, switch to a low-absorption PCB material (PTFE, Rogers) and clean the board with isopropanol after soldering.
Estimated: The SOT-23-5 has a typical theta_JA of ~200-220 °C/W on a 1 oz copper 1-square-inch JEDEC test board. At 30 V supply and a 10 mA load into a 2 kΩ load (worst-case DC dissipation inside the part is small, ~50 mW), self-heating is negligible. However, in high-voltage designs where the output swings rail-to-rail into a heavy load, monitor the die temperature rise; reduce dissipation by lowering supply rails where possible or by sourcing less output current.
Per the Analog Devices datasheet, the ADA4622-1 has a DISABLE/NC pin (pin 5) on the SOT-23-5. Leaving the pin floating enables the amplifier; tying it to V- (or ground for single supply) disables it. Designers migrating from AD820/AD822 SOT-23-5 layouts must verify pin 5 is left open or properly driven - a hard tie to V+ may cause unintended shutdown. Also, the 8 MHz GBP is significantly higher than AD820/AD822 (~1 MHz); revisit the feedback network for stability, especially when driving capacitive loads >100 pF.
Estimated: With 8 MHz GBP and JFET input, the ADA4622-1 can oscillate if the feedback network adds phase lag near the unity-gain crossover. For unity-gain buffers, add a small feedback capacitor (a few pF) between OUT and -IN to compensate for input capacitance. When driving long PCB traces or capacitive loads, isolate the capacitive load with a series resistor (10-100 Ω) at the output. Avoid running the +IN trace parallel to switching power or digital clocks to minimize coupled noise.
규정 준수 정보
RoHS compliant per DigiKey listing. Lead-free reflow profile per JEDEC J-STD-020. AEC-Q100 status not specifically listed in the verified web data; the part is graded for extended industrial (-40°C to +125°C) but not automotive-qualified unless explicitly ordered as an automotive-grade variant.
