ADI AD7247ABRZ
- Dual 12-bit voltage output DAC with on-chip 5V reference and laser-trimmed output amplifiers
- Direct 12-bit parallel load with independent CS per channel — no byte sequencing required
- Three pin-selectable output ranges: 0V to +5V, 0V to +10V, and ±5V
- REF OUT/REF IN supports on-chip or external reference without additional components
- 24-lead SOIC package, B-grade ±¼ LSB linearity, –40°C to +85°C industrial operation
The ADI AD7247ABRZ is the B-grade, 24-lead SOIC variant of the AD7247A complete dual 12-bit DAC — a fully integrated LC2MOS device combining two 12-bit voltage output DAC channels, an on-chip 5V Zener reference, dual laser-trimmed output amplifiers, and reference buffer amplifiers on a single monolithic chip. The B grade specifies ±¼ LSB maximum linearity — tighter than the A-grade ±½ LSB — making it the correct choice for designs where DAC accuracy directly constrains system performance. No external user trims are required to achieve the rated specifications from qualified stock.
The AD7247A's defining interface characteristic is its direct 12-bit parallel load: DAC A and DAC B each have their own chip select input (CS_A, CS_B), and 12-bit data loads directly into the selected DAC latch in a single write cycle with the WR strobe. This is the complementary architecture to the AD7237A — where the AD7237A uses byte loading with an asynchronous LDAC for designs constrained to 8-bit buses, the AD7247A uses a direct 12-bit parallel interface for designs where the full 12-bit word is available in one bus transaction. The SOIC package of the AD7247ABRZ makes it the surface-mount choice in the AD7247A family, sharing the same die and electrical specifications as the CERDIP TQ package variants, and pin-compatible with the AD7237ABRZ on the same PCB footprint.
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The AD7247ABRZ sits at the intersection of two selection criteria that together define the right DAC for many precision dual-channel designs: B-grade ±¼ LSB linearity and surface-mount SOIC packaging. For designs where the AD7247A architecture is the right fit — direct 12-bit parallel load, dual independent channel select, complete on-chip integration — the ABRZ variant provides the tightest available accuracy grade in the smallest available package for industrial temperature operation. The SOIC footprint enables higher-density board layouts than the DIP variants, and the B-grade specification gives an accuracy margin over the A-grade AD7247AARZ that is meaningful in precision measurement and closed-loop control applications.
AD7247ABRZ Architecture: Direct 12-Bit Parallel Load vs Byte Loading
The key architectural difference between the AD7247A and its sibling AD7237A is the interface. The AD7247ABRZ accepts a full 12-bit data word in a single write cycle — DAC A selected by CS_A, DAC B by CS_B, data latched on the rising edge of WR. There is no byte sequencing, no upper/lower byte distinction, and no LDAC synchronization signal. For designs with a 12-bit or 16-bit parallel bus, this is a more direct and lower-latency interface than byte loading. For designs constrained to an 8-bit bus, the AD7237ATQ byte-loading variant is the appropriate choice — same die, same analog specifications, different digital interface.
AD7247ABRZ vs AD7247A Family: Grade and Package Selection
| AD7247ABRZ | AD7247AARZ | AD7247ATQ | AD7247ATQ/883B | |
|---|---|---|---|---|
| Package | 24-Lead SOIC | 24-Lead SOIC | 24-Lead CERDIP | 24-Lead CERDIP |
| Grade | B (±¼ LSB) | A (±½ LSB) | A (±½ LSB) | A (±½ LSB) |
| Qualification | Commercial | Commercial | Commercial | MIL-STD-883B |
| Temperature | –40°C to +85°C | –40°C to +85°C | –40°C to +85°C | –55°C to +125°C |
| Best For | SMT, tightest accuracy | SMT, cost-sensitive | Hermetic, industrial | Military programs |
The AD7247ABRZ is the correct choice when surface-mount assembly and B-grade ±¼ LSB linearity are both required. For hermetic packaging in the industrial range, the AD7247ATQ CERDIP is the alternative. For full military qualification and –55°C to +125°C operation, the AD7247ATQ/883B under SMD 5962-90785 01MLA is the procurement path.
Sourcing the ADI AD7247ABRZ
The AD7247ABRZ is an active-production component with consistent availability across industrial instrumentation, process control, and defense-adjacent programs. 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.
- B-grade ±¼ LSB linearity — tighter than A-grade for accuracy-critical closed-loop and measurement designs
- Direct 12-bit parallel load eliminates byte sequencing overhead for designs with 12-bit or 16-bit buses
- SOIC package enables higher-density PCB layouts than DIP variants with identical electrical specifications
- On-chip 5V reference available at REF OUT pin for external signal chain use
- Independent CS_A and CS_B allow asynchronous independent updates of each DAC channel
- Pin-compatible with AD7237ABRZ on the same PCB footprint — interface mode selectable by firmware
- Direct upgrade path to military screening via AD7247ATQ/883B without schematic changes
- Full lot traceability and anti-counterfeit inspection on every order
Frequently Asked Questions (FAQ)
What Is the ADI AD7247ABRZ and How Does It Differ From the AD7237ABRZ?
The AD7247ABRZ is the B-grade, 24-lead SOIC variant of the AD7247A dual 12-bit DAC, using a direct 12-bit parallel load interface with independent CS per channel. The AD7237ATQ AD7237A uses a byte-loading interface — 12-bit data loads in two 8-bit writes via a shared 8-bit bus with an asynchronous LDAC. Both share the same die and analog specifications. Choose the AD7247A for 12-bit or 16-bit parallel buses; choose the AD7237A for 8-bit bus designs.
What Is the Difference Between AD7247ABRZ and AD7247AARZ?
Both are 24-lead SOIC variants of the AD7247A. The ABRZ is B-grade with ±¼ LSB maximum linearity; the AARZ is A-grade with ±½ LSB maximum linearity. All other specifications — reference, output amplifiers, interface, output ranges, and temperature range — are identical. Choose the ABRZ when the tighter linearity specification is needed for precision applications.
Can the AD7247ABRZ Use an External Voltage Reference?
Yes. The REF OUT/REF IN architecture allows an external reference to override the on-chip 5V Zener by driving the REF IN pin. The reference buffer amplifier isolates the external reference from the internal reference — both can coexist. For applications requiring lower drift, external precision references can be connected without disabling the internal reference.
What Is the Military Equivalent of the AD7247ABRZ?
The military equivalent is the AD7247ATQ/883B — the same die in a 24-lead hermetic CERDIP package, processed to MIL-STD-883B, rated for –55°C to +125°C, available under SMD 5962-90785 01MLA. Note that the 883B military variant is available in A-grade only; the B-grade specification is available in commercial and industrial variants only.
How Do I Request a Quote for the ADI AD7247ABRZ?
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 long-term supply agreements for production programs.