ADI AD7476ABKSZ
- 12-bit SAR ADC with 1 MSPS throughput rate and internal track-and-hold amplifier
- SPI-compatible serial interface — CS and SCLK controlled, no pipeline delay
- Single 2.35V to 5.25V supply with VDD-referenced internal reference — no external reference required
- Power-down mode with 1 µA maximum standby current for power-sensitive applications
- 6-lead SC70 package — industry's smallest 12-bit ADC footprint at industrial temperature range
The ADI AD7476ABKSZ is the B-grade, 6-lead SC70 bulk-packed variant of the AD7476A — a 12-bit, 1 MSPS successive approximation ADC that achieves high throughput at extremely low power in the smallest available package for a 12-bit converter. Operating from a single 2.35V to 5.25V supply, it derives its reference directly from VDD, eliminating the external reference component and simplifying the supply design to a single decoupled rail. The track-and-hold amplifier handles input frequencies in excess of 13 MHz, and the conversion rate is determined entirely by the serial clock frequency — a design that allows the system to trade throughput for power consumption by reducing SCLK speed and using power-down mode between conversions.
The SC70 package of the AD7476ABKSZ — six leads in a 2.0 × 2.1 mm footprint — makes it the natural choice when board area is the binding constraint in a 12-bit ADC selection. Three-wire SPI interface with CS and SCLK controls the conversion directly: the input is sampled on the falling edge of CS, and conversion data clocks out MSB-first over SDATA with no pipeline delay. The B-grade specification provides ±1.5 LSB maximum INL — the same linearity as the standard A variant with tighter production testing, appropriate for designs where the ADC's linearity error is a significant contributor to the overall measurement accuracy budget. The ABKSZ suffix denotes bulk packaging in a cut tape strip rather than a reel, suited for prototype and low-volume procurement.
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For procurement teams sourcing the AD7476ABKSZ, the combination of 6-lead SC70 packaging and 1 MSPS throughput at under 3 mW on a 5V supply defines its position in the ADC market: the smallest, lowest-power 12-bit SAR ADC with SPI interface in volume production. The ABKSZ suffix identifies bulk cut-tape packaging — the standard format for prototype and low-to-medium volume builds where reel quantities are excessive. The B-grade linearity specification provides ±1.5 LSB maximum INL with tighter production testing than the standard variant, appropriate for precision sensor interfaces where converter linearity contributes directly to measurement accuracy.
AD7476ABKSZ Architecture: VDD-Referenced SAR for Minimum External Components
The VDD-referenced internal reference is the feature that most reduces external component count in AD7476A-based designs. With no external reference required, the complete ADC circuit is the device itself plus supply decoupling — three signals connect to the processor (CS, SCLK, SDATA), and the full 0V to VDD input range is immediately usable. Power-down mode reduces standby current to 1 µA maximum by asserting CS high after conversion — the device powers back up within 1 µs when CS falls again, making the power-down/wake-up cycle compatible with throughput rates well below 1 MSPS without significant latency penalty. The serial clock flexibility means that any processor with an SPI port — including 3.3V and 5V microcontrollers, DSPs, and FPGAs — can interface directly without level translators when supply voltages are matched.
AD7476ABKSZ vs AD7476A Family: Package and Grade Selection
The AD7476A family offers three package options and two grade levels:
| AD7476ABKSZ | AD7476ABRMZ | AD7476AWYRMZ | |
|---|---|---|---|
| Package | 6-Lead SC70 | 8-Lead MSOP | 8-Lead MSOP |
| Grade | B (±1.5 LSB) | B (±1.5 LSB) | B (±1.5 LSB) |
| Temperature | –40°C to +85°C | –40°C to +85°C | –40°C to +125°C |
| Packaging | Bulk / Cut Tape | Tape and Reel | Tape and Reel |
| Best For | Smallest footprint, prototyping | SMT production, standard size | Extended temp, –40°C to +125°C |
The AD7476ABKSZ is the correct choice when minimum board area is the priority and the –40°C to +85°C industrial range is sufficient. For designs requiring operation beyond +85°C — defense avionics bays, engine compartments, or high-ambient industrial environments — the AD7476AWYRMZ extends the rating to +125°C in the same MSOP package. For production builds requiring tape and reel packaging in the SC70 footprint, the AD7476ABKSZ-500RL7 (500-unit reel) or AD7476ABKSZ-REEL7 (5000-unit reel) are the reel-packaged equivalents.
Sourcing the ADI AD7476ABKSZ
The AD7476ABKSZ is an active-production standard product with broad distribution availability. We carry verified inventory with full lot traceability and anti-counterfeit inspection on every order. Contact us today to confirm availability and request a quote — our team responds within 24 hours.
- ABKSZ suffix is bulk cut-tape — suited for prototype and low-to-medium volume procurement without reel minimum
- VDD-referenced internal reference eliminates external reference component entirely
- No pipeline delay — conversion result is available immediately after the 12th SCLK falling edge
- Power-down mode recovers in under 1 µs — enables sub-MSPS throughput with proportional power reduction
- Compatible with 3.3V and 5V SPI, QSPI, MICROWIRE, and DSP serial interfaces without level translation
- Reel-packaged equivalents available: AD7476ABKSZ-500RL7 (500 unit) and AD7476ABKSZ-REEL7 (5000 unit)
- Pin-compatible with AD7477ABKSZ (10-bit) and AD7478ABKSZ (8-bit) for resolution migration without layout changes
- Full lot traceability and anti-counterfeit inspection on every order
Frequently Asked Questions (FAQ)
What Is the ADI AD7476ABKSZ and What Does the Suffix Mean?
The AD7476ABKSZ is the B-grade, 6-lead SC70, bulk cut-tape variant of the AD7476A — a 12-bit, 1 MSPS SAR ADC with SPI serial interface, VDD-derived internal reference, and power-down mode, rated for –40°C to +85°C industrial operation. The suffix breakdown: A = AD7476A series, B = B grade (±1.5 LSB INL), KSZ = SC70 package bulk/cut-tape.
How Does the AD7476ABKSZ Derive Its Reference From VDD?
The ADC input range spans 0V to VDD, with the full-scale reference taken directly from the supply pin. This means the ADC full-scale range tracks the supply voltage — a characteristic that simplifies circuit design when the analog signal is already ratiometric to the supply, such as resistive sensor bridges or potentiometer-based position sensors. For applications requiring a fixed, supply-independent full-scale range, an external buffered reference must drive VDD or a different ADC with an external reference pin should be selected.
What Is the Difference Between AD7476ABKSZ and AD7476ABKSZ-500RL7?
The AD7476ABKSZ is bulk-packaged cut tape — individual strips of components suited for manual assembly, prototyping, or small production runs. The AD7476ABKSZ-500RL7 is the same device in a 500-unit tape-and-reel format for automated SMT production. The AD7476ABKSZ-REEL7 provides a 5000-unit reel for high-volume production. All three are electrically identical.
Is the AD7476ABKSZ Pin-Compatible With Lower-Resolution Variants?
Yes. The AD7477ABKSZ (10-bit) and AD7478ABKSZ (8-bit) use the same 6-lead SC70 pinout and are direct pin-compatible substitutes. Resolution can be changed between 8, 10, and 12 bits without PCB modification — only the part number changes. This enables hardware-compatible product families with software-selectable resolution tiers.
How Do I Request a Quote for the ADI AD7476ABKSZ?
Submit an inquiry through our website contact form or email our sales team directly. We will respond within 24 hours with pricing, availability, and lead time — and can discuss volume pricing or long-term supply agreements if needed.