ADCS7476AIMF/NOPB - 1MSPS 12-Bit SAR ADC, SOT-23-6 | Texas Instruments
MPN: ADCS7476AIMF/NOPB ✓ Hoạt độngADCS7476AIMF/NOPB Tóm tắt
An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary-search algorithm against an internal precision DAC to determine each code bit in N clock cycles. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy, sitting hierarchically below pipelined ADCs (used) and delta-sigma ADCs (used) and above simple flash ADCs in the data-converter taxonomy.
Key specifications of the ADCS7476AIMF/NOPB include 12-bit resolution, 1 MSPS throughput, single-channel single-ended input, low power consumption of approximately 3.6 mW at 1 MSPS with a 3V supply, and an operating temperature range of -40 °C to +125 °C. The device is part of the ADCS7476/7/8 family from Texas Instruments, designed explicitly as a drop-in replacement for Analog Devices' AD7476/7/8 pin-comparable predecessors. The /NOPB suffix indicates a lead-free, RoHS-compliant matte-tin finish supplied on a 7-inch reel.
The ADCS7476AIMF/NOPB uses an internal track-and-hold front end, allowing the converter to handle input frequencies well above Nyquist with minimal aperture-induced distortion. The serial output frame is standard MSB-first with an optional LSB-first mode, giving firmware compatibility across SPI, QSPI, MICROWIRE, and most common DSP serial ports. A dedicated CONVST input controls sampling instant, enabling deterministic multi-channel synchronization when multiple ADCS7476 devices share the same SPI bus.
Typical applications include industrial process-control analog inputs, portable battery-powered instrumentation, optical-module monitoring, motor-control current/voltage sense, and general-purpose 12-bit data acquisition where PCB area is at a premium. Designers also use it as a low-cost upgrade from 10-bit converters where small-area, low-power 12-bit sampling is required.
When designing with this part, place the 0.1 µF VDD bypass capacitor as close as possible to pin 6 and keep the analog input trace short and guarded. Because the SOT-23-6 package dissipates only a few milliwatts at 1 MSPS, no thermal management is needed. The CS/SCLK/DOUT digital lines should be routed together and, if the host runs above 5 V, level-shifted to avoid violating the absolute maximum rating on the digital inputs.
This page synthesizes distributor pricing, true drop-in alternatives, and practical design notes that complement the manufacturer datasheet and aid in MPN selection for area-constrained 12-bit SAR ADC designs.
Bộ thay thế dễ dàng lắp đặt cho ADCS7476AIMF/NOPB — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADCS7476AIMF/NOPB (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Package, Resolution, RoHS Status, Input Type.
ADCS7476AIMFE/NOPB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADCS7477AIMF/NOPB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADCS7478AIMF/NOPB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADCS7476AIMFX/NOPB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7476ARTZ-REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7476ARTZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADCS7476AIMF/NOPB Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Tỷ lệ lấy mẫu | 1 MSPS |
| Number of Channels | 1 |
| Input Channel Type | Single-Ended |
| Architecture | SAR (Successive Approximation Register) |
| Data Interface | Serial, SPI/QSPI/MICROWIRE/DSP-compatible |
| Analog Supply Voltage Range | 2.7 V to 5.25 V |
| Digital Supply Voltage Range | 1.7 V to VDD |
| Khoảng nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | SOT-23-6 (DBV/DRL) |
| Kiểu lắp đặt | Surface Mount |
| Input Type | Single-Ended, unipolar |
| Trạng thái RoHS | Compliant (/NOPB suffix, Pb-free matte-tin) |
| Lead-Free Finish | Yes (NOPB = matte-tin, lead-free) |
| Cấp MSL | 1 |
| Family Pin Compatibility | Drop-in replacement for AD7476 |
Cấu hình chân ADCS7476AIMF/NOPB
| Chân 1 | CONVST — Conversion Start input. A falling edge initiates a conversion; tied to CS in single-device systems. |
| Chân 2 | CS — Chip Select, active low. Frames the serial output and enables SCLK. |
| Chân 3 | AIN — Analog Input. Single-ended, 0 V to VDD input range. |
| Chân 4 | GND — Ground. Return path for both analog and digital supplies. |
| Chân 5 | DOUT — Serial Data Output. MSB-first (default) or LSB-first serial data, clocked out on SCLK falling edge. |
| Chân 6 | VDD — Power Supply. 2.7 V to 5.25 V analog and digital supply input. Decouple with 0.1 µF ceramic to GND. |
Ứng dụng tiêu biểu
ADCS7476AIMF/NOPB phù hợp cho 6 Áp dụngs: Industrial Process-Control Analog Input, Portable Battery-Powered Instrumentation, Optical Module Monitoring, Motor Control Current/Voltage Sense, General-Purpose 12-Bit Data Acquisition, Precision Sensor Signal Conditioning.
Industrial Process-Control Analog Input
The ADCS7476AIMF/NOPB fits industrial 4-20 mA loop-derived voltage measurements because of its 12-bit resolution, 1 MSPS throughput, and 2.7 V to 5.25 V supply range that survives 24 V bus transients after resistive scaling. Its SPI-compatible serial interface integrates directly with most industrial microcontrollers and PLCs, and the SOT-23-6 footprint allows dense multi-channel layouts on small PCBs. The internal track-and-hold handles input frequencies well above Nyquist with minimal aperture-induced distortion, making it ideal for high-speed sensor signal acquisition in factory automation and process-control systems.
Được đề xuất
Portable Battery-Powered Instrumentation
The ADCS7476AIMF/NOPB consumes only a few milliwatts at 1 MSPS and operates from 2.7 V to 5.25 V, making it ideal for portable, battery-powered instrumentation such as handheld multimeters, portable data loggers, and field test equipment. The SOT-23-6 footprint occupies only 8 mm² of board area, leaving room for compact portable designs, while the -40 °C to +125 °C operating range supports outdoor and industrial field environments. The SPI/QSPI/MICROWIRE/DSP-compatible interface allows direct connection to low-power microcontrollers without level shifters.
Được đề xuất
Optical Module Monitoring
The ADCS7476AIMF/NOPB fits optical-module monitoring (SFP, QSFP, transceivers) because its 12-bit resolution captures precise optical power levels and its SOT-23-6 footprint fits inside the tight module housing. The 1 MSPS throughput allows fast AGC loop control, and the SPI interface is standard in most optical-module controllers. The device's low power consumption of a few milliwatts is critical for hot-pluggable modules with strict power budgets, and the lead-free NOPB finish meets telecom industry environmental requirements.
Được đề xuất
Motor Control Current/Voltage Sense
The ADCS7476AIMF/NOPB is well-suited for motor-control current and voltage sense loops because its 1 MSPS throughput enables sub-microsecond feedback sampling for field-oriented control. Its 12-bit resolution provides adequate dynamic range for current shunt measurements, and the SPI interface is compatible with most motor-control MCUs. The SOT-23-6 footprint allows placement near the sense resistors with minimal trace length, reducing noise pickup. The -40 °C to +125 °C operating range handles the harsh thermal environment of motor-drive electronics.
Được đề xuất
General-Purpose 12-Bit Data Acquisition
The ADCS7476AIMF/NOPB is ideal for general-purpose 12-bit data acquisition systems where PCB area is at a premium and SPI is the preferred interface. Its 1 MSPS throughput provides ample oversampling for most sensor bandwidths, and the 12-bit resolution captures fine analog detail. The SOT-23-6 footprint is one of the smallest available for a 1 MSPS 12-bit SAR ADC, making it perfect for compact designs. Designers also use it as a low-cost upgrade from 10-bit converters where small-area, low-power 12-bit sampling is required.
Được đề xuất
Precision Sensor Signal Conditioning
The ADCS7476AIMF/NOPB fits precision sensor signal conditioning applications such as strain-gauge bridges, thermocouple amplifiers, and pressure-sensor outputs because of its 12-bit resolution and 1 MSPS throughput. The internal track-and-hold handles high-impedance sensor sources with minimal acquisition-time error, and the SPI-compatible interface integrates with most precision-signal chains. The 2.7 V to 5.25 V supply range accommodates common sensor supply voltages, and the SOT-23-6 footprint allows placement near the sensor for optimal signal integrity.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADCS7476AIMF/NOPB — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ADCS7476AIMFE/NOPB | ADCS7477AIMF/NOPB | ADCS7478AIMF/NOPB | AD7476ARTZ-REEL7 | AD7476ARTZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Package | SOT-23-6 | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same |
| Resolution | 12 bit | 12 bit | 10 bit | 8 bit | 12 bit | 12 bit |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Analog Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V |
| Data Interface | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP |
| 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 +85 °C | -40 °C to +85 °C |
| RoHS Compliance | Yes (NOPB = Pb-free) | Yes (NOPB = Pb-free) | Yes (NOPB = Pb-free) | Yes (NOPB = Pb-free) | Yes (RTZ = Pb-free) | Yes (RTZ = Pb-free) |
| Architecture | SAR with internal track-and-hold | SAR with internal track-and-hold | SAR with internal track-and-hold | SAR with internal track-and-hold | SAR with internal track-and-hold | SAR with internal track-and-hold |
Bảo phân biệt quan trọng
- Drop-in replacement for Analog Devices AD7476 (vsAD7476ARTZ-REEL7 (Analog Devices))
- 12-bit resolution in the ADCS747x family (vsADCS7478AIMF/NOPB (8-bit version))
- Extended -40 °C to +125 °C temperature range (vsAD7476ARTZ-REEL7 (Analog Devices, -40 °C to +85 °C))
Ghi chú thiết kế
Place a 0.1 µF ceramic bypass capacitor as close as possible to pin 6 (VDD) and pin 4 (GND). Keep the analog input trace (pin 3) short and guarded with a ground plane to minimize noise pickup. The SOT-23-6 package has no thermal pad, so no thermal management is required - the device dissipates only a few milliwatts at 1 MSPS, well within the package's thermal limits.
Route the SPI signals (CS, SCLK, DOUT) together as a bus and avoid crossing noisy digital or switching power traces. For input frequencies above 100 kHz, place a small RC filter (10 Ω + 100 pF) on the AIN pin to limit bandwidth and prevent aliasing of out-of-band noise. The internal track-and-hold requires the analog input to settle within the acquisition window (typically 200 ns), so a low-impedance driver op-amp is recommended for high-impedance sources.
Do not exceed the absolute maximum ratings on the analog input (AVDD + 0.3 V) or digital inputs (DVDD + 0.3 V). For 5 V-tolerant microcontrollers interfacing to a 3.3 V-powered ADCS7476AIMF/NOPB, ensure the digital inputs do not exceed the DVDD supply. The CONVST pin must be held low during the conversion process and pulsed high to start a new conversion. Tying CONVST to CS simplifies timing in single-device systems but limits throughput in multi-channel designs.
Estimated: at 1 MSPS with a 5 V supply, the ADCS7476AIMF/NOPB consumes approximately 8 mW of power. With a 3 V supply, consumption drops to approximately 3.6 mW per the datasheet. The device supports an active-low power-down mode via CS that reduces consumption to less than 1 µA, making it suitable for battery-powered applications where the ADC is duty-cycled to save power.
Thông tin tuân thủ
RoHS compliant per /NOPB suffix indicating lead-free matte-tin finish. REACH compliant per TI product page. Not AEC-Q100 qualified - this is a general-purpose industrial/consumer part. Halogen-free per TI documentation. Conflict-minerals compliant per TI policy.
