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DAC7558IRHBT
Texas Instruments
IC DAC 12BIT V-OUT 32VQFN
4605 Pcs New Original In Stock
12 Bit Digital to Analog Converter 8 32-VQFN (5x5)
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5.0 / 5.0
- (297 Ratings)
DAC7558IRHBT
Product Overview
1430112
DiGi Electronics Part Number
DAC7558IRHBT-DGManufacturer
Texas Instruments
DAC7558IRHBT
Description
IC DAC 12BIT V-OUT 32VQFNInventory
4605 Pcs New Original In Stock
12 Bit Digital to Analog Converter 8 32-VQFN (5x5)
Quantity
Minimum 1
Minimum 1
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DAC7558IRHBT Technical Specifications
Category
Data Acquisition, Digital to Analog Converters (DAC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Number of Bits
12
Number of D/A Converters
8
Settling Time
5µs
Output Type
Voltage - Buffered
Differential Output
No
Data Interface
SPI, DSP
Reference Type
External
Voltage - Supply, Analog
2.7V ~ 5.5V
Voltage - Supply, Digital
2.7V ~ 5.5V
INL/DNL (LSB)
±0.35, ±0.08
Architecture
String DAC
Operating Temperature
-40°C ~ 105°C
Package / Case
32-VFQFN Exposed Pad
Supplier Device Package
32-VQFN (5x5)
Mounting Type
Surface Mount
Base Product Number
DAC7558
Datasheet & Documents
Manufacturer Product Page
DAC7558IRHBT Specifications
HTML Datasheet
DAC7558IRHBT-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-DAC7558IRHBT
DAC7558IRHBT-DG
TEXTISDAC7558IRHBT
296-26046-2
296-26046-1
296-26046-6
Standard Package
250
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
手頃な価格で、高品質なサービスを受けられて良かったです。
de desembre 02, 2025
The friendly attitude of their staff makes every purchase enjoyable.
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de desembre 02, 2025
Tracking my order was simple and gave me peace of mind.
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The overall shopping process is streamlined and user-centric.
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DiGi Electronics offers excellent support, making every shopping experience smooth and enjoyable.
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Frequently Asked Questions (FAQ)
Can the DAC7558IRHBT safely drive capacitive loads above 100 pF without oscillation, and what external compensation is needed in high-speed industrial control applications?
The DAC7558IRHBT’s buffered voltage output is stable with capacitive loads up to 100 pF under typical conditions, but driving higher capacitances—common in long PCB traces or cable-connected actuators—can cause ringing or instability due to the output amplifier’s phase margin. In practice, we recommend adding a small series resistor (10–50 Ω) between the DAC output and the load to isolate the op-amp from the capacitive load. For loads exceeding 500 pF, consider an external RC snubber or a dedicated buffer stage. Always validate stability with a transient load test in your specific layout, as parasitic inductance and board parasitics significantly affect performance.
What are the key risks when replacing the DAC7558IRHBT with the Maxim MAX5216 or Analog Devices AD5686R in a multi-channel precision voltage reference system?
While the MAX5216 and AD5686R offer similar 12-bit resolution and SPI interfaces, direct replacement of the DAC7558IRHBT introduces several risks: the MAX5216 uses an internal reference (2.048 V), whereas the DAC7558IRHBT requires an external reference—changing this alters full-scale output and requires recalibration. The AD5686R has a lower settling time (1.5 µs vs. 5 µs) but different power-up behavior and requires stricter decoupling due to higher digital noise. Additionally, the AD5686R’s VREF input range is limited to VDD, while the DAC7558IRHBT supports higher external references (up to 5.5 V), affecting dynamic range. Always re-validate INL/DNL performance and thermal drift in your system before qualifying a drop-in replacement.
How does the DAC7558IRHBT’s string DAC architecture impact glitch energy during code transitions, and what mitigation strategies are effective in audio-sensitive or motor control applications?
The DAC7558IRHBT’s string (resistor ladder) architecture inherently produces lower glitch energy compared to R-2R or current-steering DACs, making it suitable for low-noise applications. However, during major code transitions (e.g., 0x000 to 0xFFF), slight imbalances in switch timing can still generate microvolt-level glitches. In sensitive systems like precision motor drives or sensor excitation, use synchronous updates across all eight channels via the LDAC pin to minimize simultaneous switching transients. Additionally, placing a low-pass RC filter (e.g., 1 kΩ + 10 nF, fc ≈ 16 kHz) at each output suppresses high-frequency glitch components without significantly affecting the 5 µs settling time.
Is the DAC7558IRHBT suitable for operation in automotive environments given its -40°C to 105°C rating, and what derating or reliability precautions are necessary for long-term deployment?
Although the DAC7558IRHBT is rated for -40°C to 105°C, this does not automatically qualify it for automotive use (which typically requires AEC-Q100 Grade 2 or better). The part lacks formal automotive certification, so deploying it in under-hood or safety-critical applications introduces reliability risks. For industrial automotive-like environments (e.g., cabin electronics), ensure conservative thermal design: keep junction temperature below 95°C using adequate PCB copper pour under the exposed pad and avoid sustained operation at 105°C. Monitor long-term drift, as string DACs can exhibit increased INL degradation under thermal cycling. Consider conformal coating if humidity exposure is expected, given MSL 2 handling requirements.
What layout and grounding practices are critical when using the DAC7558IRHBT in a mixed-signal PCB with high-speed digital processors to maintain 12-bit accuracy?
To preserve 12-bit performance with the DAC7558IRHBT, isolate analog and digital grounds using a single-point star connection near the power supply, and route the exposed thermal pad directly to the analog ground plane with multiple vias. Keep SPI/DSP signal traces short and away from analog outputs to prevent digital feedthrough. Use separate decoupling: 100 nF ceramic capacitors on both AVDD and DVDD pins, placed within 2 mm of the package. Avoid routing high-frequency digital lines over the analog section. Since the reference is external, route the VREF input with a guard ring tied to AGND and use a low-noise reference IC (e.g., REF5025) with its own bypassing. These steps minimize crosstalk and ensure INL remains within ±0.35 LSB under dynamic loading.
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DAC7558IRHBT CAD Models
Texas Instruments DAC7558IRHBT PCB symbols & footprints
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