AD7893BR-10REEL7 - 12-Bit SAR ADC, 6µs, Serial | Analog Devices
MPN: AD7893BR-10REEL7 ✓ NakahandaAD7893BR-10REEL7 Ulas
What is a SAR ADC? A successive-approximation register ADC is a precision converter class that uses a binary-search algorithm against an internal DAC to digitize an analog input one bit at a time per clock cycle. SAR ADCs occupy the middle ground between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest), and they excel in multiplexed data acquisition, instrumentation, and process-control loops where 10-16 bit accuracy at 100 kSPS-1 MSPS suffices. The AD7893 family is one of the legacy Analog Devices LC2MOS precision converters and remains popular for retrofit and refresh designs.
Key specifications include 12-bit resolution, sampling rate of approximately 117 kSPS per the datasheet, 6 microsecond typical conversion time, single +5 V supply, and an input range of ±10 V (the -10 speed grade featured on this part). It also offers low power consumption, a hardware shutdown pin (extending battery life in portable applications), and a high-speed serial data output that minimizes board-level digital noise coupling.
Designed in Analog Devices' LC2MOS process - a mixed-technology node that combines precision bipolar circuitry with low-power CMOS logic - the AD7893 achieves tight dc accuracy (linearity, full-scale, and offset error) alongside specified dynamic performance including total harmonic distortion and signal-to-noise ratio. The integrated track-and-hold eliminates the need for an external sample-and-hold stage, and the serial interface reduces pin count versus parallel-output ADCs.
Typical applications include industrial process-control data acquisition, precision instrumentation input stages, motor control current/voltage sensing, portable and battery-powered measurement equipment, point-of-load monitoring in distributed control systems, and retrofit upgrades for legacy Mini-DIP based designs.
When designing with this part, pay attention to the analog input bandwidth and source impedance - the track-and-hold aperture interacts with input RC networks and degrades THD if source impedance is too high. Decouple VDD with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin and keep the analog/digital ground return paths separated to avoid digital-noise induced linearity drift.
This page synthesizes distributor pricing, a drop-in alternatives table including the RoHS-compliant AD7893BRZ-10REEL7, application recommendations, and practical design notes not curated into the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na AD7893BR-10REEL7 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok AD7893BR-10REEL7 (parehas na form factor at footprint) — pagkakaiba sa Conversion Time, Input Type, Operating Temperature, Package, Architecture.
AD7893BRZ-10REEL7
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
AD7893ARZ-10REEL
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →AD7893BRZ-10REEL
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
AD7893BR-10REEL
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →AD7893AR-10REEL
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →AD7892BR-1
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →AD7893BR-10REEL7 Mga Pinakamataas na Rating at Electrical Characteristics
| Pangangasiwaan | 12 bits |
| Number of Inputs | 1 |
| Converter Type | SAR (Successive Approximation) |
| Rate ng Pagkupita | 117 kSPS |
| Conversion Time | 6 µs typical |
| Architecture | LC2MOS (mixed bipolar + CMOS) |
| Volte ng Pagbibigay | +5 V single supply |
| Analog Input Range | ±10 V |
| Data Interface | Serial (high-speed) |
| Track/Hold Amplifier | On-chip |
| Internal Clock | Yes (on-chip) |
| Shutdown Pin | Yes (hardware power-down) |
| Packhaging | 8-SOIC (3.90 mm body width) |
| Uri ng Pagpapasok | Surface Mount |
| Temperature na Operasyon | -40 °C to +85 °C (industrial) |
| Input Type | Pseudo-bipolar / unipolar (per datasheet) |
| Tindminan RoHS | Non-RoHS (SnPb); use AD7893BRZ-10REEL7 for RoHS |
| Packaging | Tape & Reel, 7-inch reel |
Pin Configuration ng AD7893BR-10REEL7
| Pin 1 | VDD — +5 V analog and digital supply |
| Pin 2 | AGND — Analog ground return |
| Pin 3 | REF — Reference voltage input (sets full-scale accuracy) |
| Pin 4 | VIN — Analog input, ±10 V range on -10 grade |
| Pin 5 | SCLK — External serial clock for data read-out |
| Pin 6 | SDATA — Serial data output (LSB or MSB first per datasheet) |
| Pin 7 | DGND — Digital ground return |
| Pin 8 | SHDN — Hardware shutdown (active per datasheet) |
Tipikal na mga Gamit
AD7893BR-10REEL7 ay nararapat para sa 6 aplikasyons: Industrial Process Control Data Acquisition, Precision Instrumentation Input Stage, Motor Control Current/Voltage Sensing, Portable and Battery-Powered Measurement Equipment, Point-of-Load Monitoring and Distributed Control, Retrofit of Legacy 8-Pin Mini-DIP ADC Designs.
Industrial Process Control Data Acquisition
The AD7893BR-10REEL7 fits industrial process control data acquisition with its ±10 V input range that directly accepts transducer-conditioned signals (4-20 mA derived voltages, ±10 V PLC outputs) without external scaling. The 6 µs SAR conversion runs reliably in multiplexed thermocouple, pressure, and flow front ends scanning dozens of channels per second. The serial interface reduces board footprint versus parallel ADCs and keeps digital-switching noise out of the analog signal path, improving measurement stability. On-chip track/hold and shutdown simplify channel-by-channel power management across isolated signal chains.
Inirekomenda
Precision Instrumentation Input Stage
In bench-top multimeters, chart recorders, and laboratory instrumentation, the AD7893BR-10REEL7 provides a calibrated 12-bit front end with specified linearity, full-scale and offset errors. The ±10 V bipolar-tolerant input scale handles ±10 V standard instrument ranges directly; the on-chip track/hold stabilizes transient readings for transients up to 117 kSPS. The combination of DC accuracy specs and dynamic SNR/THD makes the ADC suitable for both DC panel meters and audio-bandwidth signal analyzers. The shutdown pin supports portable operation, allowing idling between measurements to extend battery life in field instruments.
Inirekomenda
Motor Control Current/Voltage Sensing
The AD7893BR-10REEL7 functions as the ADC in closed-loop motor-control boards, sampling shunt-resistor-derived current signals and DC bus voltages at 117 kSPS. The ±10 V input range is well-matched to ±10 V around-shunt op-amp outputs from current-sense amplifiers, requiring no extra signal conditioning. The serial data output simplifies routing on motor-drive PCBAs where high-side switching generates intense EMI - unlike parallel ADCs it reduces pin count and radiated noise. Hardware shutdown enables low-power standby between control cycles in battery-powered traction and robotics subsystems.
Inirekomenda
Portable and Battery-Powered Measurement Equipment
The AD7893BR-10REEL7 is ideal for portable data loggers and handheld instruments due to its single +5 V supply (often a low-dropout regulator from a Li-ion cell) and the hardware shutdown pin that lowers quiescent current between measurement bursts. SAR architecture offers the lowest idle-to-active wake time versus sigma-delta ADCs, making it ideal for intermittent-sampling wearables and field tools. The 8-SOIC package is small enough for handhelds, and serial output requires only two microcontroller pins. The -40 °C to +85 °C industrial temperature grade enables outdoor and cold-chain deployments.
Inirekomenda
Point-of-Load Monitoring and Distributed Control
In distributed control systems and rack-mount equipment, the AD7893BR-10REEL7 monitors per-rail voltages, temperatures, and current with high accuracy. The SAR architecture delivers deterministic timing for synchronous sample-and-display updates, and the serial data stream allows easy isolation across isolators or opto-couplers. The ±10 V input range accommodates 24 V industrial bus signals via simple resistive dividers. On-chip shutdown supports per-channel power management in densely populated backplanes where active channels cycle through hundreds of measurement points each second.
Inirekomenda
Retrofit of Legacy 8-Pin Mini-DIP ADC Designs
The AD7893BR-10REEL7 directly replaces the legacy 8-pin Mini-DIP-packaged AD7893 in PCB retrofits where the SOIC footprint is acceptable. Its pin-for-pin and electrical compatibility with the original Mini-DIP SOIC variant enables design refresh without layout changes, while the modern reel-pack format supports high-speed reflow assembly. Designers upgrading older instrumentation maintain the same conversion time, sampling rate, and serial protocol - firmware porting is minimal. The RoHS-compliant AD7893BRZ-10REEL7 is the preferred long-term replacement for production retrofit programs.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for AD7893BR-10REEL7 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | AD7893BRZ-10REEL7 | AD7893ARZ-10REEL | AD7893BRZ-10REEL | AD7893BR-10REEL | AD7893AR-10REEL | AD7892BR-1 |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC (3.90 mm) - same | 8-SOIC - same family footprint |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Conversion Time / Sample Rate | 6 µs / 117 kSPS (-10 grade) | 6 µs / 117 kSPS - same | 6 µs / 117 kSPS - same | 6 µs / 117 kSPS - same | 6 µs / 117 kSPS - same | 6 µs / 117 kSPS - same | 5 µs / 200 kSPS faster |
| Approx. 100-piece Price (USD) | 14.95 | 14.95 (RoHS variant) | 12.50 | 13.50 | 14.50 | 11.95 | 14.95 |
| Shutdown Pin | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Pangunahing mga Pagkakaiba
- Non-RoHS SnPb finish is one of the only AD7893 grades still in active production (kumpara saAD7893BRZ-10REEL7)
- 7-inch reel (REEL7) packaging for compact assembly lines (kumpara saAD7893BRZ-10REEL (13-inch reel))
- Grade B linearity for industrial instrumentation calibration accuracy (kumpara saAD7893ARZ-10REEL (Grade A))
- ±10 V input on +5 V supply eliminates external resistor dividers (kumpara saAD7892BR-1 (sibling, different grade))
Talaan ng Disenyo
Decouple VDD with a 0.1 µF X7R ceramic capacitor placed within 5 mm of pin 1 of the AD7893BR-10REEL7. Add a 10 µF tantalum or low-ESR electrolytic bulk capacitor if the supply traces are longer than 50 mm. Although the LC2MOS converter has modest supply current, noisy digital or switching supplies couple into the analog supply and corrupt the ±10 V input linearity - a ferrite bead on VDD is recommended for boards with shared analog/digital rails.
Keep the analog ground (pin 2) and digital ground (pin 7) returns separated internally and joined at a single point near the power entry. Route SCLK and SDATA away from the analog input pin 4 to avoid capacitive coupling of clock edges into the VIN trace. Route REF pin 3 traces short and place its decoupling capacitor as close to the IC as possible to preserve ADC linearity across temperature.
Estimated: with a 1 kΩ source impedance, the AD7893BR-10REEL7's ±10 V input front end adds approximately 0.5 % of full-scale error due to finite settling through the track/hold. For 12-bit accuracy, keep source impedance below 100 Ω by buffering with a low-offset op-amp driver (AD8628 or equivalent). Verify with the input bandwidth specification in the manufacturer datasheet. Slower or improperly-settled VIN edges will directly manifest as higher THD in dynamic waveforms.
Do not exceed the SCLK rate specified in the AD7893 datasheet - faster clocks may violate the serial readback timing window. Avoid operating the part with VIN outside the ±10 V range on the -10 grade for extended periods, as internal ESD protection can leak into conversion accuracy. Always assert the SHDN pin per datasheet polarity for shutdown to engage; leaving it floating leaves the part active and increases supply current.
Impormasyon ng Pagsunod sa Kautusan
SnPb finish is not RoHS-compliant - use lead-free AD7893BRZ-10REEL7 for new RoHS designs. Reach status and conflict-mineral compliance per Analog Devices product page; halogen-free status not specified.
