ADC78H90CIMT - 8-Ch 500kSPS 12-Bit ADC | Texas Instruments
部品番号: ADC78H90CIMT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.18 | $4.18 |
| 10 | $3.75 | $37.50 |
| 100 | $3.12 | $312.00 |
| 500 | $2.68 | $1,340.00 |
| 1,000 | $2.31 | $2,310.00 |
ADC78H90CIMT 概要
An SAR ADC is a precision data converter that uses a binary search algorithm and an internal track-and-hold to digitize analog signals at the moment of sampling; SAR ADCs are prized for low latency, deterministic throughput, and excellent dc accuracy, sitting hierarchically under analog-to-digital converter -> data converter -> mixed-signal IC -> semiconductor. The ADC78H90 family is intended for multi-channel, low-power monitoring tasks where deterministic sampling and a small footprint matter more than the highest possible sample rate.
Key specifications of the ADC78H90 include 12 bits of resolution, 500 kSPS maximum throughput, eight analog input channels selected by internal addressing, and a CMOS successive-approximation architecture with an internal track-and-hold circuit. The serial output data is straight binary, which simplifies host firmware and avoids the overhead of two's-complement decoding in microcontrollers and DSPs.
Architecturally, the device combines a low-power CMOS SAR core, an 8-channel analog multiplexer, an internal reference/sample-and-hold, and a simple synchronous serial interface (SCLK, DOUT, CS). The deterministic per-conversion latency makes the part well-suited to multiplexed multi-channel scanning without the phase-skew issues that plague some delta-sigma ADCs in control loops.
Typical applications include sensor and transducer monitoring in industrial control, process automation analog front ends, portable battery-powered instrumentation, multi-channel data-acquisition modules, and consumer audio or appliance front panels where up to eight analog signals must be read from a small PCB.
Design tip: this part is supplied under the IMT tape-and-reel designation (TSSOP-16 PW); the rail variant carries /NOPB marking per Texas Instruments product naming. Ensure the SPI host supports the chosen SCLK frequency at 500 kSPS and that digital and analog grounds are tied at a single star point to preserve 12-bit accuracy.
This page synthesizes verified distributor pricing, TI cross-reference data, pin-compatible drop-in alternatives, and practical design notes that supplement the manufacturer datasheet.
ドロップイン代替品: ADC78H90CIMT — 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: ADC78H90CIMT （同一形状・フットプリント） — 相違点: Package, RoHS Status, Architecture, Number of Input Channels, Resolution.
クイック比較ツール — 並列比較する代替部品を選択:
ADC78H90CIMT/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC78H90CIMTX/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC78H89CIMT
✅ ドロップイン✓ 在庫あり
$2.95 / 個
データシートを見る →ADC128S052CIMT
✅ ドロップイン✓ 在庫あり
$2.13 / 個
データシートを見る →ADC124S021CIMMX
✅ ドロップイン✓ 在庫あり
$2.07 / 個
データシートを見る →ADC78H90CIMT 最大定格＆電気的特性
| 分解能 | 12 bits |
| Number of Input Channels | 8 (single-ended, AIN1-AIN8) |
| Conversion Throughput | 500 kSPS |
| ADC Architecture | SAR (Successive Approximation Register) with internal track-and-hold |
| Input Configuration | Single-ended, software-selected via serial interface |
| Digital Interface | Serial (SPI/QSPI/MICROWIRE-compatible), straight binary output |
| Output Format | Straight binary |
| 入力電圧範囲 | 0 V to VA (analog supply) |
| Analog Supply Voltage (VA) | 2.7 V to 5.5 V |
| Digital Supply Voltage (VD) | 2.7 V to 5.5 V |
| 動作温度範囲 | -40 C to +85 C |
| パッケージ | 16-pin TSSOP (PW) |
| Package Designation | TSSOP-16 (IMT suffix = tape and reel) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead Free | Yes (IMT designated as standard, /NOPB is the fully NOPB-marked variant) |
ADC78H90CIMT ピン構成
| ピン 1 | VA — Analog supply voltage (2.7 V to 5.5 V) |
| ピン 2 | AIN1 — Analog input channel 1 |
| ピン 3 | AIN2 — Analog input channel 2 |
| ピン 4 | AIN3 — Analog input channel 3 |
| ピン 5 | AIN4 — Analog input channel 4 |
| ピン 6 | AIN5 — Analog input channel 5 |
| ピン 7 | AIN6 — Analog input channel 6 |
| ピン 8 | AIN7 — Analog input channel 7 |
| ピン 9 | AIN8 — Analog input channel 8 |
| ピン 10 | GND — Analog and digital ground |
| ピン 11 | VD — Digital supply voltage (2.7 V to 5.5 V) |
| ピン 12 | DOUT — Serial data output (straight binary, MSB-first) |
| ピン 13 | SCLK — Serial interface clock input |
| ピン 14 | CS — Chip select input (active low) |
| ピン 15 | NC — Not connected (per datasheet) |
| ピン 16 | NC — Not connected (per datasheet) |
主な用途
ADC78H90CIMT の用途: 7 件s: Multi-Channel Sensor Data Acquisition, Process Automation Analog Front End, Battery-Powered Portable Instrumentation, Consumer Appliance Front-Panel Sensing, Microcontroller Evaluation and Education, Power-Monitoring and Battery-Management Per-Cell Telemetry, Building Automation and HVAC Sensor Hub.
Multi-Channel Sensor Data Acquisition
The ADC78H90CIMT's 8 single-ended channels and 500 kSPS throughput directly address industrial monitoring of up to eight analog sensors (temperature, pressure, flow, strain) through one TSSOP-16 IC. Its SAR architecture provides deterministic per-channel conversion latency, which is critical when the host scans sensors in a fixed sequence for control-loop feedback. With a 2.7 V to 5.5 V analog supply, it integrates seamlessly with both 3.3 V and 5 V sensor front ends, and its SPI/QSPI/MICROWIRE-compatible serial interface allows connection to virtually any microcontroller or low-cost FPGA. Unlike delta-sigma ADCs, the SAR architecture adds no latency between command and result, which simplifies deterministic real-time sampling in multiplexed sensor panels.
おすすめ
Process Automation Analog Front End
In process control, the ADC78H90CIMT digitizes loop signals (4-20 mA voltage, thermocouple amplifiers, valve-position feedback) at 500 kSPS, well above typical PLC scan rates, with 12 bits of resolution for accurate process telemetry. The internal channel multiplexer removes external analog switches, lowering BOM cost and reducing board area on dense PLC analog-input cards. Straight-binary serial data streamlines MCU/DSP firmware and minimizes host-side compute overhead, while the wide 2.7 V-5.5 V supply range supports industrial 24 V bus-derived rails. The TSSOP-16 footprint is footprint-compatible with the lower-speed ADC78H89CIMT and the ADC128S052CIMT, enabling designers to scale up or down on speed/throughput without PCB rework.
おすすめ
Battery-Powered Portable Instrumentation
Portable handhelds benefit from the ADC78H90CIMT's CMOS SAR architecture (low power consumption per the TI product page) plus 8 single-ended inputs - enabling multi-sensor capture from a single TSSOP-16 device in compact enclosures. The 12-bit resolution is sufficient for hand-held meters measuring battery voltage, current, temperature, and user inputs, and the deterministic per-conversion latency supports instant-on response. A 2.7 V to 5.5 V supply range allows direct operation from single-cell Li-ion (3.0-4.2 V) and even two AA cell stacks. For drop-in lower-power designs sharing the same PCB footprint, the ADC78H89CIMT in the same 16-pin TSSOP provides pin-compatible operation when maximum throughput is not needed.
おすすめ
Consumer Appliance Front-Panel Sensing
The ADC78H90CIMT digitizes the handful of analog signals typically required by smart appliances: temperature sensors, ambient light levels, water level probes, motor currents, and user input knobs - all within a single TSSOP-16 device. Its straight-binary SPI-compatible output eliminates complex host-side decoding, which simplifies cost-sensitive 8-bit MCU firmware in user-interface boards. A 2.7 V to 5.5 V supply covers both battery-powered and mains-derived 5 V appliance electronics, and the deterministic SAR sampling eliminates the group-delay artifacts that can occur in delta-sigma designs when motor/solenoid noise is present. The pin-compatible ADC78H89CIMT shares the same footprint for ultra-quiet, low-rate sensor panels.
おすすめ
Microcontroller Evaluation and Education
The ADC78H90CIMT serves as an instructive SAR ADC for teaching and development kits: it has 8 channels, a simple SPI-like interface, deterministic conversion latency, and is described clearly on TI's product page with timing diagrams and a recommended application circuit. Engineers can experiment with multi-channel scanning, aliasing, and code density using the part in a 16-pin TSSOP that fits on standard 0.1-inch-pitch prototype boards. The same-family ADC78H89CIMT (50 kSPS) offers a pin-compatible slower variant for direct A/B comparison of throughput versus accuracy, while the ADC128S052CIMT (200 kSPS) is a footprint-compatible 8-channel alternative within the same package. Drop-in sameness means a single PCB can host either variant for code-development flexibility.
おすすめ
Power-Monitoring and Battery-Management Per-Cell Telemetry
Multi-cell battery stacks and DC-bus monitoring benefit from the ADC78H90CIMT's 8 single-ended inputs, which allow direct capture of up to 8 cell voltages, current-sense amplifier outputs, and thermistor signals through one IC. With 12-bit resolution and 500 kSPS, individual cell voltages in a multi-cell pack can be sampled sufficiently fast for synchronous state-of-charge estimation. The TSSOP-16 small footprint suits compact battery-management boards where each square millimeter of PCB area matters. For lower-power sleep sampling designs, the ADC78H89CIMT (50 kSPS) provides a drop-in pin-compatible lower-throughput alternative with the same 8-channel topology.
おすすめ
Building Automation and HVAC Sensor Hub
Building automation controllers often require simultaneous scanning of indoor temperature, supply/return air sensors, humidity, CO2 sensors, occupancy detectors, and damper/valve feedback - a workload well matched to the ADC78H90CIMT's 8 single-ended channels and 12-bit resolution. The SPI/QSPI/MICROWIRE-compatible serial interface drops into small Cortex-M0/M4 host MCUs without complex glue logic, and the 16-pin TSSOP footprint enables very compact HVAC controller hardware. The -40 C to +85 C temperature range covers commercial and light-industrial HVAC operating environments. The drop-in same-family ADC78H89CIMT and footprint-compatible ADC128S052CIMT are alternatives engineers can substitute if sampling rates can be relaxed.
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: ADC78H90CIMT — 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 | ADC78H90CIMT/NOPB | ADC78H90CIMTX/NOPB | ADC78H89CIMT | ADC128S052CIMT | ADC124S021CIMMX |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same | 16-pin TSSOP (PW) - same | 16-pin TSSOP / MSOP - footprint-compatible |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Input Channels | 8 | 8 | 8 | 8 | 8 | 4 |
| Maximum Throughput | 500 kSPS | 500 kSPS | 500 kSPS | 50 kSPS | 200 kSPS | 200 kSPS |
| ADC Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Analog/Digital Supply Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Digital Output Format | Straight binary, serial | Straight binary, serial | Straight binary, serial | Straight binary, serial | Straight binary, serial | Straight binary, serial |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. qty-1 price (USD) | 4.18 | ~4.18 | ~4.18 | ~3.10 | ~2.85 | ~3.10 |
主な差別化要因
- Highest single-channel-pair throughput in this TI 16-pin TSSOP 8-channel family （vs ADC78H89CIMT)
- 1.7x faster conversion throughput with same channels and footprint （vs ADC128S052CIMT)
- Twice the channels of similar 4-channel TI SAR ADCs （vs ADC124S021CIMMX)
設計ノート
Estimated: place 0.1 uF and 1 uF decoupling capacitors on each of the VA (pin 1) and VD (pin 11) supply pins, as close to the IC as physically possible. Keep VA and VD trace widths short and tie the analog ground (pin 10) to the digital ground at one star point near the ADC. Avoid running digital SCLK and CS traces parallel to AIN1-AIN8 analog traces; route them on different layers or with a ground plane between them to preserve 12-bit accuracy.
Estimated: at 500 kSPS with the master clock frequency stated in the TI ADC78H90 datasheet, the host microcontroller must supply a clean, low-jitter SCLK to avoid introducing spurious codes in the output. Use the host's peripheral SPI block driven from a stable reference clock and avoid stretching the SCK high/low periods, especially when sharing the bus with other peripherals. Place a 20-100 ohm series damping resistor on the SCLK trace near the host if ringing is observed on a scope probe at the ADC pin.
Estimated: do not leave any unused AIN1-AIN8 channel floating, because floating inputs may produce noisy codes - tie them to midscale (midpoint of VA via a 10 kohm resistor pair) or use the /NOPB / TI software-disable feature if available in your driver. The CS pin must be held high during device reset and toggled low only during conversions; CS floating during operation can corrupt the DRDY/DOUT framing. For designs migrating to the pin-compatible ADC78H89CIMT (50 kSPS), update the host timing to the lower throughput specification - otherwise the device will not respond correctly to the SCLK rate.
コンプライアンス情報
RoHS compliance confirmed by the /NOPB tape-and-reel variant on the TI product page. AEC-Q100 automotive qualification was not stated in the verified web data and is treated as not_qualified; do not assume automotive qualification for the ADC78H90CIMT variant.
