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Analog Devices Inc. AD7303BRM-REEL
- Part No.:
- AD7303BRM-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7303BRM-REEL.pdf
- Description:
- IC DAC 8BIT DUAL R-R 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:45,000
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Product details
Overview
AD7303BRM-REEL from Analog Devices is a dual 8-bit parallel-input voltage-output DAC operating from a single +2.7 V to +5.5 V supply, featuring rail-to-rail buffered outputs, internal/external reference selection, and power-down mode consuming ≤1 µA at 25°C. It delivers 2 µs max settling time, ±1 LSB relative accuracy, and simultaneous DAC update via LDAC - used in portable instrumentation for programmable gain/offset calibration.
For engineers reviewing the AD7303BRM-REEL datasheet, AD7303BRM-REEL pinout, AD7303BRM-REEL application, or AD7303BRM-REEL equivalent, key selection criteria include its dual-channel 8-bit resolution, TSSOP-20 package compatibility, 2.7–5.5 V single-supply operation, rail-to-rail output swing, and support for both internal (VDD/2) and external (1.0 V to VDD/2) reference sources.
Technical Context
The AD7303BRM-REEL implements a current-source DAC architecture followed by an on-chip I/V converter with gain of 2, enabling 0 V to VDD output range. Its double-buffered parallel interface supports two update modes: automatic (LDAC tied low) and simultaneous (LDAC-controlled), with register-level control via CS, WR, A/B, and CLR signals.
Reference selection is handled by an internal comparator that switches between VDD/2 and external REFIN based on voltage threshold (~1 V below VDD). Power-down is asserted via active-low PD pin, disabling bias loops and output amplifiers while preserving register contents and yielding 13 µs wake-up time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - defines 256 discrete output voltage steps per channel |
| Relative Accuracy | ±1 LSB max - ensures monotonic transfer function across full code range |
| Output Voltage Range | 0 V to VDD - rail-to-rail swing enabled by integrated output buffers |
| Settling Time | 2 µs max - guarantees stable analog output within 8-bit accuracy after code change |
| Supply Voltage | +2.7 V to +5.5 V - supports battery-powered systems including 3.3 V and 5 V logic domains |
| Power-Down Current | 1 µA max at 25°C - enables ultra-low standby power in portable equipment |
| Digital Crosstalk | 0.2 nV·s typ - minimizes interference between DAC A and DAC B during code updates |
Pinout & Package
AD7303BRM-REEL is housed in a 20-lead TSSOP package (RU-20), measuring 6.5 mm × 4.4 mm × 1.2 mm, with exposed pad for thermal enhancement and standard JEDEC MO-153 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Parallel data inputs | 8-bit bus loading DAC input registers on rising edge of CS or WR |
| CS | Chip select | Active-low enable for data latching; allows multi-DAC address decoding |
| WR | Write strobe | Active-low signal triggering register load; timing-critical for microprocessor interface |
| A/B | DAC channel select | High = DAC A, Low = DAC B - determines which register receives data |
| PD | Power-down control | Active-low entry into <1 µA standby mode; preserves register state |
| LDAC | Load DAC latch | Asynchronous update trigger for simultaneous output update of both DACs |
| CLR | Asynchronous clear | Active-low reset forcing zero-code output on both channels regardless of register content |
| REFIN | Reference input | Accepts 1.0 V to VDD/2 external reference; ties to VDD selects internal VDD/2 source |
| VOUTA / VOUTB | Analog outputs | Rail-to-rail buffered voltage outputs with 40 Ω DC impedance and 7.5 V/µs slew rate |
| VDD, AGND, DGND | Power and ground | Separate analog/digital grounds minimize noise coupling; VDD powers all circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit DACs | Enables two synchronized or independently controlled analog outputs in one compact TSSOP-20 package |
| On-chip rail-to-rail output buffers | Eliminates need for external op-amps in most applications; supports 10 kΩ || 100 pF load |
| Internal/external reference selection | Auto-switching comparator simplifies design: tie REFIN to VDD for VDD/2, or apply 1.0–VDD/2 external reference |
| Double-buffered parallel interface | Prevents partial updates; allows safe asynchronous LDAC-triggered simultaneous output changes |
| Power-down mode | Reduces IDD to ≤1 µA while retaining DAC register contents - critical for battery life in portable instruments |
Applications
| Programmable Gain/Offset Calibration | Digital Attenuator Control |
|---|---|
Use Scenario: Calibrating sensor front-end gain and offset in handheld test equipment using microcontroller-generated correction values. IC Role / Device Role / Timing Role: Dual DAC provides independent analog bias voltages for programmable amplifier and offset nulling circuits. Use Value: ±1 LSB relative accuracy ensures precise correction over temperature; rail-to-rail output covers full sensor signal range without external level-shifting. |
Use Scenario: Setting attenuation levels in RF or audio signal paths via digitally controlled voltage-variable resistors or multiplier-based attenuators. IC Role / Device Role / Timing Role: AD7303BRM-REEL generates precision reference voltages controlling analog multiplier gain or JFET-based variable resistance. Use Value: 2 µs settling time enables fast reconfiguration; low digital crosstalk (0.2 nV·s) prevents channel-to-channel interference during dynamic adjustment. |
| Portable Battery-Powered Instrumentation | Bipolar Signal Generation |
Use Scenario: Power-sensitive medical or field-deployable measurement devices requiring long runtime and stable analog outputs. IC Role / Device Role / Timing Role: Dual DAC supplies calibrated excitation voltages and reference levels for ADC biasing and sensor drive. Use Value: 1 µA power-down current extends battery life; single 2.7–5.5 V supply eliminates need for auxiliary rails in compact designs. |
Use Scenario: Generating symmetric ±5 V analog waveforms or control signals from a single 5 V supply in embedded waveform generators. IC Role / Device Role / Timing Role: AD7303BRM-REEL drives external op-amp circuitry (e.g., AD820) configured for inverting summing to achieve bipolar output. Use Value: Internal VDD/2 reference and gain-of-2 architecture simplify bipolar scaling; 8-bit resolution supports 20 mV step size in ±5 V range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 8-bit voltage-output DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7302BRUZ-REEL | Same architecture and pinout; identical TSSOP-20 package and electrical specs; differs only in tape-and-reel packaging suffix (-REEL vs -REEL7) | No functional difference; both support same reference modes, power-down, and timing | Select AD7303BRM-REEL when sourcing from distributors specifying RU-20 package with M suffix (moisture-sensitive level 3) |
| MAX522EUA+ | Single-supply dual 8-bit DAC in 8-pin µMAX; lacks LDAC, CLR, and internal reference; requires external op-amps for rail-to-rail output | Lower pin count but higher BOM cost and board area due to external components; no simultaneous update capability | Choose AD7303BRM-REEL when simultaneous channel update, integrated buffers, or internal reference are required |
Compared with AD7302BRUZ-REEL, AD7303BRM-REEL offers identical functionality with verified moisture-sensitivity compliance for automated assembly; versus MAX522EUA+, it delivers lower system-level complexity through integrated buffers, reference selection, and dual-channel synchronization - reducing layout risk and calibration overhead.
Availability
AD7303BRM-REEL is available at Aetrix Electronics and suitable for portable instrumentation, sensor calibration systems, and programmable attenuator modules requiring stable component supply, consistent TSSOP-20 packaging, and guaranteed industrial temperature range (–40°C to +105°C).
Supply support for AD7303BRM-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The AD7303 is part of Analog Devices' precision DAC product line, designed specifically for low-power, single-supply embedded systems requiring dual-channel programmable analog outputs with minimal external components.
FAQ
What is the operating temperature range for the AD7303BRM-REEL?
The AD7303BRM-REEL is rated for –40°C to +105°C, matching the B-grade specification defined in the AD7302/AD7303 datasheet. This industrial temperature range is validated across all electrical parameters including relative accuracy (±1 LSB), power consumption, and settling time, making AD7303BRM-REEL suitable for harsh-environment embedded applications without derating.
Does the AD7303BRM-REEL support simultaneous updating of both DAC outputs?
Yes, the AD7303BRM-REEL supports simultaneous updating via the LDAC pin: when LDAC is taken low asynchronously, both DAC A and DAC B outputs update together with the contents of their respective DAC registers. This feature is essential for coordinated analog signal generation and is confirmed in the functional block diagram and timing specifications of the AD7303BRM-REEL datasheet.
Can the AD7303BRM-REEL operate from a 3.3 V supply?
Yes, the AD7303BRM-REEL operates from +2.7 V to +5.5 V, fully supporting 3.3 V nominal systems. At VDD = 3.3 V, typical supply current is 2.3 mA (both DACs active), and power-down current remains ≤1 µA. The internal VDD/2 reference yields 1.65 V, producing 0–3.3 V output range - verified in Figures 6 and 7 of the AD7303BRM-REEL datasheet.
What is the maximum capacitive load the AD7303BRM-REEL output can drive?
The AD7303BRM-REEL output buffer is characterized for a load of 10 kΩ || 100 pF to VDD and GND, with 2 µs max settling time and 7.5 V/µs slew rate. Driving heavier capacitive loads (>100 pF) may degrade settling behavior and increase glitch impulse; for >500 pF, external isolation or buffering is recommended per Figure 27's application guidance.
How does reference selection work on the AD7303BRM-REEL?
The AD7303BRM-REEL uses an internal comparator to auto-select between internal VDD/2 and external REFIN: if REFIN is tied to VDD, the internal reference activates; if REFIN is ≥1 V below VDD (e.g., 1.0–2.75 V for 5.5 V VDD), the external reference is selected. This behavior is documented in the General Description and Figure 20 of the AD7303BRM-REEL datasheet.
AD7303BRM-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Number of Bits:
- -
- Number of D/A Converters:
- -
- Settling Time:
- -
- Output Type:
- -
- Differential Output:
- -
- Data Interface:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- INL/DNL (LSB):
- -
- Architecture:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7303BRM-REEL FAQ
1.How can I place an order for AD7303BRM-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7303BRM-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7303BRM-REEL reliable?
The price and inventory of AD7303BRM-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7303BRM-REEL is usually 5 days.
3.What payment methods are accepted for AD7303BRM-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7303BRM-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7303BRM-REEL?
AD7303BRM-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7303BRM-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7303BRM-REEL?
For technical support, including AD7303BRM-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7303BRM-REEL requirements.
6.How does Aetrix verify that AD7303BRM-REEL is sourced from the original manufacturer or authorized distributors?
All AD7303BRM-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7303BRM-REEL meets industry standards.
7.What is the process for return or replacement of AD7303BRM-REEL?
All AD7303BRM-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7303BRM-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7303BRM-REEL part is unused and in its original packaging.
Return procedure for AD7303BRM-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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