ADS7807U - 16-Bit 40 kSPS Low-Power SAR ADC | Texas Instruments
部品番号: ADS7807U ✓ 生産中ADS7807U 概要
An ADC is a data-conversion semiconductor that converts a continuously varying analog voltage into a numeric code for measurement, control, or communication. The ADS7807 belongs to the sampling ADC hierarchy and uses the successive-approximation, or SAR, architecture. Unlike a pipeline or delta-sigma ADC, a SAR ADC successively resolves the input through a comparator and internal DAC, making this device suitable for compact, low-power instrumentation that needs precise conversion without a complex signal chain.
The principal feature is 16-bit resolution with no missing codes, combined with differential nonlinearity specified as 16 bits and integral nonlinearity of ±1.5 LSB maximum. Signal-to-noise plus distortion is specified at a minimum of 86 dB for a 1 kHz input under the stated test conditions. Acquisition and conversion complete within 25 µs maximum, supporting the stated 40 kSPS conversion rate, while low-power operation limits dissipation to 35 mW maximum.
The device supports both SPI-compatible serial output and a full parallel interface with byte select, giving designers flexibility in processor connectivity. A daisy-chain TAG function supports serial-interface arrangements, and an internal or external reference option permits the analog front end to use either the on-chip source or a higher-precision system reference. These features allow a single converter to serve serial microcontroller systems as well as parallel data-acquisition designs without changing the analog measurement function.
Typical uses include industrial process monitoring, laboratory data acquisition, battery-powered measurement, factory automation, portable instrumentation, and control systems that require a compact 16-bit converter. In each case, the ADS7807U is placed between the measured sensor or conditioned analog signal and a digital controller, with the selected input range, reference, and serial or parallel interface matched to the system architecture.
Designers should pay particular attention to source impedance, reference stability, input filtering, and grounding. Acquisition time must be sufficient for the input network to charge the internal sample-and-hold capacitor, and the analog return path should be kept short and quiet. Because the converter accepts both bipolar and unipolar ranges, the input-conditioning circuitry must not exceed the selected range or introduce nonlinear overdrive.
This product page consolidates verified manufacturer and distributor specifications, pricing availability, family-level drop-in candidates, comparison parameters, and practical design guidance. It adds engineering-oriented context for engineers evaluating the ADS7807U while clearly separating verified values from information that still requires confirmation from an authoritative datasheet or distributor quote.
ドロップイン代替品: ADS7807U — 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: ADS7807U （同一形状・フットプリント） — 相違点: Package, SINAD, Architecture, Operating Temperature Range, Data Interface.
ADS7807UB/1K
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS7806U/1K
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →ADS7805UE4
✅ ドロップイン価格はお問い合わせください
データシートを見る →ADS7809U
✅ ドロップイン価格はお問い合わせください
データシートを見る →ADS7813U/1K
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS7807U 最大定格＆電気的特性
| 分解能 | 16 bits |
| Conversion Rate | 40 kSPS |
| Input Channels | 1 input |
| Architecture | Successive-approximation register (SAR) |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Power Dissipation | 35 mW maximum |
| Power-Down Current | 50 µW |
| Acquisition and Conversion Time | 25 µs maximum |
| Integral Linearity | ±1.5 LSB maximum |
| Differential Nonlinearity | 16 bits, no missing codes |
| SINAD | 86 dB minimum with 1 kHz input under stated test conditions |
| Bipolar Input Range | ±10 V |
| Unipolar Input Ranges | 0 V to 5 V and 0 V to 4 V |
| Reference | Internal or external |
| Digital Interface | SPI-compatible serial interface and full parallel interface with byte select |
| Serial Daisy-Chain Support | TAG function |
| 動作温度範囲 | -40 °C to 85 °C |
| パッケージ | 28-pin SOIC (DW) |
| 実装タイプ | Surface mount |
ADS7807U 28-pin soic (dw) ピン配置ガイド
ADS7807U (28-pin soic (dw) パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: ADS7807U.
詳細は データシート をご参照ください。
主な用途
ADS7807U の用途: 6 件s: Industrial Process Monitoring, Battery-Powered Instrumentation, Laboratory Data Acquisition, Factory Automation Control, Portable Environmental Monitoring, Precision Signal Measurement.
Industrial Process Monitoring
The ADS7807U fits industrial process-monitoring channels because it combines 16-bit resolution with a 40 kSPS conversion rate and a selectable ±10 V input range. Texas Instruments describes the device as a low-power SAR ADC with 35 mW maximum dissipation, allowing multiple conditioned sensor channels to share an instrumentation architecture. The input divider, protection network, and filter should drive the selected range without distortion. Its 25 µs maximum acquisition-and-conversion interval permits rapid process updates, while 86 dB minimum SINAD supports measurements where quantization and analog noise materially affect control-loop decisions.
おすすめ
Battery-Powered Instrumentation
The ADS7807U is suitable for portable and battery-powered instrumentation because it draws no more than 35 mW during operation and supports a 50 µW power-down mode. Its 16-bit conversion capability provides more usable resolution than a basic embedded ADC, while the 4.75 V to 5.25 V supply range fits common 5 V power systems. A host controller can schedule short conversion bursts, place the converter in power-down between measurements, and retain its supply or reference configuration. The design must still account for reference startup, input settling, and the 25 µs maximum acquisition-and-conversion time.
おすすめ
Laboratory Data Acquisition
The ADS7807U suits laboratory data-acquisition modules that need a 16-bit ADC with selectable bipolar or unipolar inputs without requiring a high-speed pipeline converter. The verified specifications identify ±10 V, 0 V to 5 V, and 0 V to 4 V ranges, a 40 kSPS maximum rate, and both SPI-compatible and parallel interfaces. This flexibility allows the same converter to feed either a serial instrument controller or a parallel acquisition logic. For accurate readings, the laboratory front end should include stable excitation, input filtering, a low-noise reference, and a return path that avoids switching-node interference.
おすすめ
Factory Automation Control
The ADS7807U can support factory automation systems that must monitor slowly changing process signals with better than 12-bit resolution. Its 16-bit conversion, ±1.5 LSB maximum integral nonlinearity, 16-bit differential nonlinearity with no missing codes, and 40 kSPS throughput provide a useful balance between accuracy and acquisition speed. The converter is placed after sensor excitation and signal conditioning, with its output read by a controller through the SPI-compatible interface or parallel bus. Industrial implementation should add appropriate input protection, grounding, surge handling, and environmental isolation beyond the converter's own ratings.
おすすめ
Portable Environmental Monitoring
The ADS7807U is a reasonable front-end ADC for portable environmental monitoring equipment that combines battery-operated sensors, selectable input ranges, and moderate sampling speed. The 50 µW power-down mode enables duty-cycled measurements, while the 16-bit resolution can preserve detail from low-level sensor signals after suitable amplification. The 40 kSPS rate is more than sufficient for many temperature, humidity, gas, and pressure transducers, provided the analog front end settles completely. Select the correct input range and reference configuration for each sensor and use a low-leakage protection path to avoid errors during intermittent operation.
おすすめ
Precision Signal Measurement
The ADS7807U applies to precision signal-measurement chains where 16-bit resolution, 86 dB minimum SINAD, and selectable input ranges are more useful than high conversion speed. Texas Instruments specifies ±10 V, 0 V to 5 V, and 0 V to 4 V operating ranges and supports internal or external references, allowing the measurement accuracy to be tied to the system's reference quality. A carefully filtered and settled analog front end should precede the converter. For low-level signals, external-reference operation, guarding, short ground returns, and separate analog and digital return paths can be as important as the converter's headline resolution.
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: ADS7807U — 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 | ADS7807UB/1K | ADS7806U | ADS7805U | ADS7809U | ADS7813U/1K |
|---|---|---|---|---|---|---|
| Package | SOIC-28 (DW) | SOIC-28 (DW), suffix details require confirmation | SOIC-28 (DW), same family | SOIC-28 (DW) | SOIC-28 (DW), suffix details require confirmation | SOIC-28 (DW), suffix details require confirmation |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主な差別化要因
- Higher nominal resolution than the compatible 12-bit family member （vs ADS7806U)
- Documented 40 kSPS throughput in a 35 mW-class converter （vs ADS7805U)
- Broader verified input-range flexibility （vs ADS7809U)
- Closer documented family identity than a differently numbered comparison candidate （vs ADS7813U/1K)
設計ノート
Treat the analog input as a settling network rather than a direct logic connection. The ADS7807U allows 25 µs maximum for acquisition and conversion, so the source impedance, external filter, switched-capacitor charging current, and protection-network leakage must together allow the sample-and-hold capacitor to reach the required accuracy. Place the input filter and protection components close to the device, and verify settling with the actual source impedance rather than relying only on the nominal 25 µs conversion limit.
Separate the analog input and reference paths from digital clock and serial-data traces. Use a compact ground reference under the analog section, keep the reference connection short, and route converter outputs away from high-impedance input and reference nodes. The verified material does not reproduce the complete pin table, so the final land pattern and decoupling arrangement must be checked against the official 28-pin SOIC drawing and manufacturer recommended-layout material before fabrication.
Budget the analog supply for the stated 35 mW maximum dissipation while accounting for external reference and input-network losses. The 50 µW power-down figure can reduce standby consumption, but it does not eliminate the need for stable startup behavior or proper sequencing. Confirm the converter's exact power pin, reference bypass, and decoupling requirements in the official datasheet; the supplied excerpts do not provide pin-specific capacitor values or power-up timing.
Do not assume that a same-family MPN is automatically a drop-in replacement. ADS7806U is explicitly described as pin-compatible with ADS7807U but has only 12-bit resolution, so its measurement error can be materially higher. ADS7809U and ADS7813U may differ in channels, throughput, and input configuration. Before substitution, compare the official pin tables, input ranges, acquisition timing, interface behavior, reference voltage, operating temperature, and qualification requirements.
コンプライアンス情報
The verified excerpts do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. The stated -40 °C to 85 °C industrial operating range is not treated as AEC-Q100 qualification.