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HomeProductsResistorsChip Resistor - Surface MountAT0805DRE07221KL
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AT0805DRE07221KL - YAGEO

Manufacturer Part Number
AT0805DRE07221KL
Manufacturer
Yageo
Allelco Part Number
98D-AT0805DRE07221KL
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
45,444 pcs available, New & Original
Parts Description
RES SMD 221K OHM 0.5% 1/8W 0805
Package
0805
Data sheet
AT0805DRE07221K.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 45444
  • Unit Price: $0.099
  • Subtotal: $0.00

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1+ $0.099 $0.10
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

AT0805DRE07221KL Tech Specifications
YAGEO - AT0805DRE07221KL technical specifications, attributes, parameters and parts with similar specifications to YAGEO - AT0805DRE07221KL

Product Attribute Attribute Value
Manufacturer Yageo
Tolerance ±0.5%
Temperature Coefficient ±50ppm/°C
Supplier Device Package 0805
Size / Dimension 0.079" L x 0.049" W (2.00mm x 1.25mm)
Series AT
Resistance 221 kOhms
Ratings AEC-Q200
Power (Watts) 0.125W, 1/8W
Product Attribute Attribute Value
Package / Case 0805 (2012 Metric)
Package Tape & Reel (TR)
Operating Temperature -55°C ~ 155°C
Number of Terminations 2
Height - Seated (Max) 0.024" (0.60mm)
Features Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
Failure Rate -
Composition Thin Film

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8533.21.0030

Frequently Asked Questions(FAQ)

What makes the AT0805DRE07221KL suitable for automotive applications compared to standard thin-film resistors?
The AT0805DRE07221KL is qualified to AEC-Q200 automotive standards and incorporates anti-sulfur coating, which prevents degradation from hydrogen sulfide exposure common in underhood and high-pollution environments. The thin-film construction combined with ±0.5% tolerance and ±50ppm/°C temperature coefficient ensures stable 221 kOhm performance across the -55°C to 155°C operating range typical of automotive powertrain and safety-critical circuits. Moisture resistance at MSL 1 allows the AT0805DRE07221KL to maintain tolerance without conditioning requirements, reducing assembly complexity for high-volume production.
How does the AT0805DRE07221KL's temperature coefficient affect circuit behavior in thermal cycling?
With a ±50ppm/°C temperature coefficient, the AT0805DRE07221KL experiences approximately 0.55% total resistance shift across its full -55°C to 155°C operating window (210°C span). For the 221 kOhm value, this translates to roughly ±1.2 kOhm drift. In sensor signal conditioning or precision feedback networks, this drift must be accounted for in circuit compensation or tolerance budgets. The thin-film composition of the AT0805DRE07221KL provides superior temperature stability compared to carbon-film alternatives, making it preferable for analog front-end circuits where gain or threshold accuracy depends on resistor matching across temperature extremes.
Can the AT0805DRE07221KL be used in high-impedance input circuits without compromising noise performance?
The 221 kOhm resistance value of the AT0805DRE07221KL places it in the mid-to-high impedance range suitable for input biasing, pull-up/pull-down networks, and transimpedance configurations. Thin-film resistors exhibit lower noise (typically 10–15 nV/√Hz) compared to wirewound or thick-film alternatives, making the AT0805DRE07221KL appropriate for low-level analog applications. However, circuit designers must balance the noise advantage against source impedance; at 221 kOhm, the AT0805DRE07221KL generates thermal noise of approximately 1.8 µV RMS across 1 MHz bandwidth. In high-gain amplifier stages, input impedance buffers or precision op-amp circuits should be considered to isolate the AT0805DRE07221KL from sensitive nodes.
What is the practical power dissipation margin when the AT0805DRE07221KL operates at maximum rated current?
The AT0805DRE07221KL is rated for 0.125W (1/8W) continuous dissipation. At the 221 kOhm resistance value, maximum current before reaching 0.125W is approximately 23.8 mA, corresponding to a 527V potential difference—well above typical circuit voltages. In realistic low-voltage designs (5V, 12V, 24V), the AT0805DRE07221KL operates with substantial power margin. For example, at 24V across 221 kOhms, dissipation is only 2.6 mW, consuming less than 2% of rated capacity. This margin permits integration into dense PCB layouts without thermal management concerns and accommodates transient overvoltage events without premature failure.
How does the AT0805DRE07221KL compare to the RT0805DRE07221KL in terms of performance and reliability?
The AT0805DRE07221KL and RT0805DRE07221KL share identical electrical specifications: 221 kOhm ±0.5%, thin-film construction, ±50ppm/°C temperature coefficient, and AEC-Q200 qualification. Both are YAGEO products in the 0805 package with anti-sulfur and moisture-resistant coatings. The primary distinction lies in series designation and potential manufacturing date codes; the AT0805DRE07221KL represents YAGEO's AT series, while the RT variant may reflect different internal process controls or supply-chain batching. From an engineering perspective, substitution between the AT0805DRE07221KL and RT0805DRE07221KL is electrically valid. Procurement should verify lead times and cost; the AT0805DRE07221KL may offer different availability or pricing depending on distributor inventory.
Why is the AT0805DRE07221KL specified as RoHS3 compliant, and what does this mean for long-term supply continuity?
RoHS3 compliance indicates the AT0805DRE07221KL meets the Restriction of Hazardous Substances Directive 2011/65/EU, limiting lead, cadmium, mercury, and other restricted materials in electrical equipment sold in the EU. The AT0805DRE07221KL's RoHS3 status ensures the component will remain available for designs targeting EU markets and prevents supply disruption due to regulatory phase-outs. REACH unaffected status further confirms the AT0805DRE07221KL contains no substances of very high concern (SVHCs) requiring authorization. For new product development or long-lifecycle applications, specifying the AT0805DRE07221KL reduces regulatory risk and simplifies documentation for global distribution.
What design considerations apply when using the AT0805DRE07221KL in high-frequency or mixed-signal circuits?
The AT0805DRE07221KL is a passive resistor without frequency-dependent impedance limitations in typical analog and low-frequency digital applications. However, at 221 kOhm, parasitic inductance and capacitance become relevant at RF frequencies. In PCB layout, minimize loop area between the AT0805DRE07221KL pads and connected nodes to reduce parasitic inductance effects. At frequencies above 10 MHz, the AT0805DRE07221KL may exhibit slightly elevated impedance due to self-resonance, though the magnitude remains negligible for most signal conditioning and biasing functions. In mixed-signal designs, place the AT0805DRE07221KL close to its connected circuit node and avoid routing high-frequency switching signals directly adjacent to resistor traces to prevent capacitive coupling.
How should the AT0805DRE07221KL be handled during assembly and reflow to preserve its anti-sulfur and moisture-resistant properties?
The AT0805DRE07221KL is specified at MSL 1 (unlimited moisture exposure), eliminating the need for desiccant storage or baking before assembly. Anti-sulfur coating and moisture-resistant thin-film design persist through standard reflow soldering (typically 240–260°C peak). However, to maximize reliability in harsh automotive environments, avoid prolonged exposure to high-humidity storage (>90% RH) or corrosive atmospheres before soldering. The AT0805DRE07221KL should be stored in normal conditions (20–25°C, <70% RH) in original packaging. During wave or selective soldering, peak solder temperature should remain below 260°C to prevent coating degradation. Post-reflow cleaning with appropriate solvents does not compromise the AT0805DRE07221KL's protective coatings.
What tolerance stack-up implications arise when using multiple AT0805DRE07221KL resistors in ratio-critical circuits?
The ±0.5% tolerance of the AT0805DRE07221KL is tighter than standard carbon-film resistors (±5%) but typical for thin-film precision components. In precision instrumentation circuits where resistor ratios determine gain or accuracy—such as transimpedance amplifiers or programmable attenuators—individual AT0805DRE07221KL tolerances accumulate. For a two-resistor divider using identical AT0805DRE07221KL values, worst-case ratio error approaches ±1% (both resistors at tolerance extremes). In higher-order networks or filter designs, component matching and temperature tracking become more critical than absolute tolerance; selecting AT0805DRE07221KL resistors from the same manufacturing batch improves consistency.
Can the AT0805DRE07221KL be used as a pull-up resistor in open-drain I2C or CAN bus applications?
The AT0805DRE07221KL's 221 kOhm value exceeds typical pull-up recommendations for standard I2C (1.5–10 kOhm at 5V or 3.3V) and CAN bus termination (120 Ohm), making it unsuitable as a primary bus pull-up. However, the AT0805DRE07221KL is well-suited for secondary functions such as logic input biasing, supply rail filtering, and high-impedance signal conditioning. In isolated I2C slave circuits or low-current safety-critical lines, a single AT0805DRE07221KL may serve as a weak pull-up to a local supply rail, provided bus speed and capacitive loading remain within acceptable limits. Verify signal rise time meets specification when combining the AT0805DRE07221KL with PCB and component parasitic capacitance.
How does the AT0805DRE07221KL perform in precision voltage dividers for analog-to-digital converter input conditioning?
The AT0805DRE07221KL's ±0.5% tolerance and ±50ppm/°C temperature coefficient support precision voltage dividers for ADC input scaling. In a two-resistor divider with a second AT0805DRE07221KL in series (total ~442 kOhm), divider ratio error remains below ±1% across temperature. Thin-film construction minimizes frequency-dependent impedance effects, reducing noise injection into ADC inputs. For 8-bit resolution (0.39% LSB), the AT0805DRE07221KL's tolerance margin accommodates typical system tolerances. However, ADC supply filtering, input buffering, and PCB trace impedance control remain critical; the AT0805DRE07221KL alone does not guarantee ADC accuracy without supporting circuit design.
What is the expected lifetime and failure mechanism of the AT0805DRE07221KL under extended high-temperature operation?
The AT0805DRE07221KL, qualified to AEC-Q200 standards, undergoes accelerated thermal life testing to ensure reliability at automotive peak temperatures (155°C). Thin-film resistors exhibit excellent long-term stability; resistance drift under continuous high-temperature stress typically remains <0.5% over 5000+ hours. The anti-sulfur and moisture-resistant coatings prevent common failure mechanisms (surface oxidation, hydrogen sulfide attack) in underhood or industrial environments. While the AT0805DRE07221KL datasheet does not specify an explicit failure rate (MTBF), AEC-Q200 qualification implies defect rates <100 FIT per JEDEC standards. In practical automotive applications with thermal cycling, solder joint fatigue typically governs component lifetime before resistor degradation becomes a concern.
How does the AT0805DRE07221KL's thin-film construction affect repair and rework operations?
The AT0805DRE07221KL's thin-film substrate is more robust than wirewound resistors during rework but requires careful temperature control. Peak reflow temperatures (240–260°C) do not damage the AT0805DRE07221KL, but rapid thermal cycling during selective removal and reflow can stress solder joints and potentially degrade the substrate coating. For repair, the AT0805DRE07221KL should be removed using localized heat (iron temperature ~350°C, duration <10 seconds per pad) and replaced with new components from the same manufacturing batch to maintain tolerance consistency. Hot-air rework systems are acceptable; avoid excessive dwell time above 260°C. Once soldered, the AT0805DRE07221KL maintains its anti-sulfur properties without additional protective coatings.
What substitution options exist if the AT0805DRE07221KL becomes unavailable, and how do they compare electrically?
Listed substitutes for the AT0805DRE07221KL include the RT0805DRE07221KL (YAGEO alternative series), RN732ATTD2213D100 (Panasonic equivalent at 221 kOhm), and RN732ATTD2213F50. All substitutes maintain 0.125W power rating, thin-film construction, and ±0.5% tolerance in 0805 packaging. Electrical performance is equivalent; differences lie in manufacturer process controls, lead times, and cost. The RN732 variants may offer different temperature coefficients (verify datasheet); if matched temperature tracking is required, batch-source replacements from the same manufacturer as the original AT0805DRE07221KL. For long-term supply security, evaluate alternate value combinations (e.g., parallel or series resistor networks) that achieve the required 221 kOhm function using more readily available components.

Parts with Similar Specifications

The three parts on the right have similar specifications to YAGEO AT0805DRE07221KL

Product Attribute AT0805DRE0721KL AT0805DRE0722K6L AT0805DRE07215KL AT0805DRE07221RL
Part Number AT0805DRE0721KL AT0805DRE0722K6L AT0805DRE07215KL AT0805DRE07221RL
Manufacturer YAGEO YAGEO YAGEO YAGEO
Height - Seated (Max) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Size / Dimension - - - -
Ratings - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Tolerance - - - -
Features - - - Simultaneous Sampling
Failure Rate - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Composition - - - -
Power (Watts) - - - -
Resistance - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Temperature Coefficient - - - -
Number of Terminations - - - -

AT0805DRE07221KL Datasheet PDF

Download AT0805DRE07221KL pdf datasheets and YAGEO documentation for AT0805DRE07221KL - YAGEO.

Datasheets
AT Series, Automotive.pdf

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    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

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AT0805DRE07221KL Image

AT0805DRE07221KL

YAGEO
98D-AT0805DRE07221KL

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