TLV2888IDGKR - 36V 14MHz Zero-Drift Dual Op Amp | TI
部品番号: TLV2888IDGKR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TLV2888IDGKR 概要
A zero-drift operational amplifier uses auto-zero or chopper techniques to continuously cancel input offset voltage and thermal drift. In the system hierarchy: zero-drift op amp -> precision operational amplifier -> operational amplifier -> amplifier IC -> analog semiconductor. The TLV2888 belongs to the TLVx888 family (TLV888 single, TLV2888 dual, TLV4888 quad), optimized for applications needing both low DC error and wide signal bandwidth.
Key features from the TI datasheet (TLVx888, Rev. B) include 3uV typical offset voltage, 0.01uV/C typical drift, and 150dB PSRR and 150dB CMRR. The input common-mode range extends to the negative rail and the output swings rail-to-rail, maximizing dynamic range on single supplies up to 36V.
The mux-friendly input architecture minimizes charge-injection transients when inputs are switched, which is critical for multiplexed data-acquisition front ends feeding SAR or delta-sigma ADCs. The 14MHz bandwidth and 40V/us slew rate support fast sampled signals while preserving near-zero DC offset - a combination that distinguishes the TLV2888 from slower zero-drift amplifiers such as the OPA2187.
Typical applications include multiplexed industrial data acquisition, high-precision sensor conditioning, motor-control current sensing, and servo or valve control loops where a 36V rail is available. Low offset and drift allow direct connection to precision ADCs like the ADS1220 without a separate auto-zero stage, and 150dB CMRR preserves accuracy across high common-mode voltages.
Design tip: keep feedback resistors low enough to limit Johnson noise, decouple the supply pins close to the VSSOP-8 package, and avoid large capacitive loads on the output unless datasheet stability criteria are followed, or chopper ripple may increase. Pricing shown is indicative as of 2026-08-30.
ドロップイン代替品: TLV2888IDGKR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TLV2888IDGKR （同一形状・フットプリント） — 相違点: Amplifier Type, Package, RoHS Status, Slew Rate, Mounting Type.
クイック比較ツール — 並列比較する代替部品を選択:
TLV2888IDGKR-Q1
✅ ドロップイン✓ 在庫あり
$1.85 / 個
データシートを見る →OPA2375IDGKR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.68 / 個
データシートを見る →OPA2187IDGKR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
OPA2188IDGKR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADA4528-2ARMZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.8 / 個
データシートを見る →TLV2888IDGKR 最大定格＆電気的特性
| Amplifier Type | Chopper (Zero-Drift), MUX-Friendly |
| Number of Channels | 2 (Dual) |
| Gain Bandwidth Product | 14 MHz |
| Slew Rate | 40 V/us |
| Input Offset Voltage | 3 uV (typ), 15 uV (max) |
| Offset Voltage Drift | 0.01 uV/C (typ), 0.1 uV/C (max) |
| Input Voltage Noise | 7.5 nV/sqrtHz |
| PSRR | 150 dB |
| CMRR | 150 dB |
| 出力タイプ | Rail-to-Rail |
| Input Common-Mode | Input to negative rail |
| 動作温度 | -40C to +125C (I grade) |
| パッケージ | 8-VSSOP (DGK) |
| 実装タイプ | Surface Mount |
| Packaging | Tape & Reel (DGKR suffix) |
TLV2888IDGKR ピン構成
| ピン 1 | OUT A — Channel A output |
| ピン 2 | -IN A — Channel A inverting input |
| ピン 3 | +IN A — Channel A non-inverting input |
| ピン 4 | V- — Negative supply (or GND on single supply) |
| ピン 5 | +IN B — Channel B non-inverting input |
| ピン 6 | -IN B — Channel B inverting input |
| ピン 7 | OUT B — Channel B output |
| ピン 8 | V+ — Positive supply, up to 36V |
主な用途
TLV2888IDGKR の用途: 6 件s: Multiplexed Industrial Data Acquisition, Precision Sensor Conditioning, Motor Control Current Sensing, Servo and Valve Control Loops, Precision ADC Analog Front End, Medical and Diagnostic Instrumentation.
Multiplexed Industrial Data Acquisition
The TLV2888's mux-friendly input architecture settles quickly and suppresses charge-injection transients when multiplexer channels switch, a key failure mode in slower zero-drift amplifiers. With 14MHz bandwidth, 40V/us slew rate, and 15uV maximum offset, it buffers multiplexed sensor signals accurately into SAR or delta-sigma ADCs on 36V industrial rails. Placed between the mux output and ADC input, it preserves DC accuracy across channels while its 150dB CMRR rejects common-mode noise from industrial environments, improving effective channel-to-channel repeatability.
おすすめ
Precision Sensor Conditioning
The TLV2888's 3uV typical offset and 0.01uV/C drift allow direct amplification of millivolt-level sensor signals - thermocouples, strain gauges, and bridge sensors - without manual calibration or auto-zero stages. Its input common-mode range extending to the negative rail simplifies single-supply designs, while rail-to-rail output maximizes ADC dynamic range on supplies up to 36V. The 7.5nV/sqrtHz noise keeps small signals resolvable, and 150dB PSRR ensures stable gain despite noisy industrial power supplies, yielding high-resolution measurements over the full -40C to +125C range.
おすすめ
Motor Control Current Sensing
In motor-drive current-sense amplification, the TLV2888's 40V/us slew rate and 14MHz bandwidth capture fast PWM-related current transients, while its 15uV maximum offset keeps low-side shunt measurements accurate at small currents. Operation on up to 36V rails covers common 12V, 24V, and 36V industrial bus systems without level shifting. The 150dB CMRR rejects switching common-mode noise at the shunt node, and the rail-to-rail output maps the full shunt range into the ADC input window of TI C2000 microcontroller on-chip ADCs.
おすすめ
Servo and Valve Control Loops
Servo and proportional-valve control demands amplifiers with both DC precision and bandwidth to close high-performance loops. The TLV2888 provides 15uV maximum offset for accurate position-feedback amplification and 14MHz GBW to support loop crossover frequencies far above mechanical resonances, avoiding phase-lag-induced instability. Its 36V rating interfaces directly with industrial actuator supplies, and the zero-drift topology eliminates long-term offset drift that would otherwise cause slow position creep, maintaining control accuracy over temperature and product lifetime.
おすすめ
Precision ADC Analog Front End
The TLV2888 drives precision ADCs directly: its low 3uV offset contributes negligible error against a 24-bit converter's LSB size, and the 7.5nV/sqrtHz noise adds minimal degradation when gain resistors are chosen with low Johnson noise. The 14MHz bandwidth enables fast settling after mux or gain switching, supporting high sample-rate acquisition, while rail-to-rail output preserves every code of ADC span. Mux-friendly inputs tolerate the charge kickback typical of switched-capacitor SAR ADC inputs, reducing the need for large external settling capacitors.
おすすめ
Medical and Diagnostic Instrumentation
Precision diagnostic equipment benefits from the TLV2888's zero-drift topology: 0.01uV/C drift means biosignal and analytical-measurement front ends retain calibration over temperature without periodic adjustment. The 7.5nV/sqrtHz noise floor preserves small physiological signals, while 150dB CMRR rejects 50/60Hz mains interference commonly present in clinical environments. Rail-to-rail output on single 3.3V to 36V supplies gives designers flexibility across portable and benchtop instrument architectures, and the compact VSSOP-8 package suits dense multichannel measurement boards.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TLV2888IDGKR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TLV2888IDGKR-Q1 | OPA2375IDGKR | OPA2187IDGKR | ADA4528-2ARMZ |
|---|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | MSOP-8 - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Gain Bandwidth | 14 MHz | 14 MHz | 5.5 MHz | 5.5 MHz | 4 MHz |
| Supply Voltage (max) | 36 V | 36 V | 36 V | 5.5 V | 5.5 V |
| Zero-Drift | Yes | Yes | No | Yes | Yes |
| Mux-Friendly Input | Yes | Yes | No | No | No |
| Temperature Range | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
主な差別化要因
- Fastest zero-drift bandwidth in class （vs OPA2187IDGKR)
- 36V supply tolerance （vs ADA4528-2ARMZ)
- Mux-friendly input architecture （vs OPA2375IDGKR)
設計ノート
Place 0.1uF ceramic decoupling capacitors directly across the V+ (pin 8) and V- (pin 4) pins with minimal loop area to the ground plane. The VSSOP-8 (DGK) power pad layout allows short, wide traces. For 36V operation, ensure creepage and clearance meet board voltage rules, and verify the power-pad thermal connection to reduce junction heating in dual-channel configurations.
Keep feedback resistors in the low-kilohm range to limit Johnson noise added to the amplifier's 7.5nV/sqrtHz input noise - for example, 1k to 10k resistors add negligible noise while 100k resistors contribute several nV/sqrtHz. Avoid large capacitive loads on OUT pins unless datasheet stability criteria are followed; chopper ripple on the output can increase with capacitive loading and poor layout.
Although the TLV2888 is mux-friendly, verify settling time at your actual closed-loop gain when switching multiplexer channels - high-gain configurations reduce effective bandwidth below the 14MHz GBW figure. Do not exceed the 36V absolute maximum supply, and remember the input common-mode extends only to the negative rail, not the positive rail; consult the TLVx888 datasheet (Rev. B) common-mode graphs for your supply conditions.
コンプライアンス情報
Standard TI green/RoHS flow for the 8-VSSOP package. AEC-Q100 variant available as TLV2888IDGKR-Q1. Confirm REACH and halogen-free declarations from TI material documents.
