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Analog Devices Inc. AD8456ASTZ
- Part No.:
- AD8456ASTZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- -
- Datasheet:
-
AD8456ASTZ.pdf
- Description:
- IC BATT FORMATION AND TEST ASSP
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Product details
Overview
AD8456ASTZ from Analog Devices is a precision, 16 MHz unity-gain stable CBFET operational amplifier with 100 V/µs slew rate, 350 ns settling time to 0.01%, and 0.25 mV max input offset voltage. It serves as a high-speed, low-drift buffer and signal conditioner in precision data acquisition systems driving ADC/DAC interfaces, active filters, and photodiode preamplifiers.
For engineers reviewing the AD8456ASTZ datasheet, AD8456ASTZ pinout, AD8456ASTZ application, or AD8456ASTZ equivalent, this op amp delivers verified 12-bit accuracy in unity-gain configurations, supports ±15 V supplies, drives 100 pF/500 Ω loads, and replaces legacy hybrid and BiFET amplifiers without layout changes in many instrumentation designs.
Technical Context
The AD8456ASTZ employs complementary bipolar (CB) process technology with laser-wafer trimming for ultra-low DC errors. Its JFET input stage delivers 0.5 nA input bias current and 10¹¹ Ω input resistance, while maintaining 12.8 MHz minimum unity-gain bandwidth and 1.75 MHz full-power bandwidth at ±10 V output swing.
It is internally compensated and unity-gain stable, specified under 100 pF capacitive load and 500 Ω resistive load conditions. The device achieves 94 dB minimum CMRR over ±10 V common-mode range and 250 V/mV minimum open-loop gain into ≥500 Ω loads-enabling true 12-bit linearity in buffer circuits without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 12.8 MHz min - ensures stable operation and flat frequency response up to 12+ MHz in follower configurations |
| Slew Rate | 100 V/µs - enables clean 10 V step response within 100 ns, critical for fast DAC output buffering |
| Settling Time | 350 ns to 0.01% - guarantees sub-LSB settling for 12-bit systems sampling at ≥1 MSPS |
| Input Offset Voltage | 0.25 mV max - eliminates need for external nulling in most precision sensor and converter interface applications |
| CMRR | 94 dB min (±10 V CM range) - maintains accuracy in noisy industrial environments with large common-mode transients |
| Open-Loop Gain | 250 V/mV min into 500 Ω - ensures <0.004% gain error in unity-gain buffers driving moderate loads |
| Input Bias Current | 0.5 nA max - preserves signal integrity in high-impedance photodiode and piezoelectric sensor front-ends |
Pinout & Package
AD8456ASTZ is supplied in an 8-lead SOIC package (R-8 footprint), compatible with standard surface-mount assembly processes. Package dimensions: 4.90 mm × 6.00 mm × 1.75 mm, body width 3.90 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (V+) | Connects to positive supply for internal offset adjustment; differs from standard op amp pinout |
| 2 | Inverting Input (–IN) | Differential input node; high-impedance JFET gate with 4 pF capacitance |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to Pin 2 for optimal CMRR performance |
| 4 | V– | Negative supply rail connection; must be decoupled locally per TPC 19 |
| 5 | NC | No connect - internal die pad; leave unconnected and unbonded |
| 6 | Output | Capable of sourcing/sinking 50 mA; specified for 12.5 V swing into 500 Ω |
| 7 | V+ | Positive supply rail connection; substrate tied to this pin per metalization photo |
| 8 | Offset Null (V+) | Duplicate connection to Pin 1 for symmetric nulling; both pins tied to V+ |
Key Features
| Feature | Design Value |
|---|---|
| DC Precision + AC Speed Integration | Laser-trimmed 0.25 mV offset + 100 V/µs slew rate enables 12-bit accuracy in high-speed closed-loop systems |
| Load Drive Capability | Specified for 100 pF || 500 Ω - matches typical ADC input capacitance and trace impedance without stability compensation |
| Thermal Stability | 5 µV/°C max offset drift - maintains calibration integrity across –40°C to +85°C industrial temperature range |
| Low Noise Performance | 4 µV p-p (0.1–10 Hz) and 25 nV/√Hz @ 1 kHz - suitable for low-level sensor signal conditioning |
| High Input Impedance | 10¹¹ Ω || 4 pF - minimizes loading on high-Z sources like photodiodes and piezoelectric transducers |
Applications
| Active Filter Design | Photodiode Preamp |
|---|---|
|
Use Scenario: Second-order Sallen-Key low-pass filter with 1 MHz cutoff for anti-aliasing before 2 MSPS ADC. IC Role / Device Role / Timing Role: Unity-gain buffer and gain-setting amplifier with precise pole placement enabled by stable 16 MHz GBW. Use Value: Maintains filter Q-factor and phase linearity due to >10× GBW-to-cutoff ratio and minimal phase shift near cutoff. |
Use Scenario: Transimpedance amplifier converting 100 nA–10 µA photocurrent to 0–5 V output for optical encoder feedback. IC Role / Device Role / Timing Role: Low-bias-current, low-noise transimpedance stage with 10¹¹ Ω input resistance and 4 pF input capacitance. Use Value: Enables >100 dB dynamic range and <10 ns pulse response without oscillation, even with 10 pF photodiode junction capacitance. |
| ADC Driver | Sample-and-Hold Amplifier |
|
Use Scenario: Driving AD7606 16-bit SAR ADC analog input with 5 V p-p, 100 kHz full-scale sine wave. IC Role / Device Role / Timing Role: High-slew-rate unity-gain buffer ensuring full-scale transitions settle within 350 ns to 0.01%. Use Value: Prevents missing codes and integral nonlinearity (INL) degradation caused by incomplete settling before conversion start. |
Use Scenario: Hold amplifier in precision data logger capturing 100 kSPS burst samples from strain gauge bridge. IC Role / Device Role / Timing Role: Low-drift, low-settling buffer holding sampled voltage during ADC conversion cycle. Use Value: Achieves <1 LSB droop over 10 µs hold time due to 0.25 mV offset and 5 µV/°C drift, eliminating hold capacitor refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA605 | Higher 180 V/µs slew rate but 1.2 mV max offset; no laser trimming; 10.5 MHz GBW | Better for >5 MSPS DAC buffering; less suitable for 12-bit DC-critical sensor interfaces | Select OPA605 when speed dominates over DC precision; AD8456ASTZ preferred for calibrated measurement systems |
| AD8065 | Faster 145 MHz GBW and 180 V/µs slew, but 1.5 mV offset and 10 pF input capacitance | Optimized for video and RF gain blocks; higher noise (7 nV/√Hz) limits low-level signal use | Choose AD8065 for wideband AC-coupled signal paths; AD8456ASTZ remains superior for DC-coupled precision analog front-ends |
Compared with OPA605 and AD8065, AD8456ASTZ uniquely balances 100 V/µs slew rate, 0.25 mV offset, and 12.8 MHz GBW-making it the only option among the three qualified for 12-bit accuracy in both AC and DC-coupled unity-gain buffer roles across industrial temperatures.
Availability
AD8456ASTZ is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor signal conditioning, and high-resolution ADC/DAC interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8456ASTZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD845 family was designed specifically for high-speed precision instrumentation-bridging the performance gap between legacy hybrid amplifiers and monolithic solutions in test equipment, medical imaging, and automated test systems.
FAQ
What is the operating temperature range for AD8456ASTZ?
The AD8456ASTZ is rated for industrial operation from –40°C to +85°C. This grade corresponds to the AD845B specification level and is validated across the full range for parameters including input offset voltage drift (≤5 µV/°C), CMRR (≥94 dB), and open-loop gain (≥250 V/mV). All electrical tests per REV. E datasheet are performed at temperature extremes to ensure compliance.
Does AD8456ASTZ require external offset nulling?
No, AD8456ASTZ does not require external offset nulling in most applications. Its maximum input offset voltage is 0.25 mV, and laser wafer trimming ensures tight DC matching. The device uses V+ for internal offset nulling (Pins 1 and 8), eliminating the need for potentiometers or external circuitry-reducing board space and improving long-term stability.
Can AD8456ASTZ drive heavy capacitive loads like ADC inputs?
Yes, AD8456ASTZ is explicitly characterized driving 100 pF in parallel with 500 Ω, matching typical SAR ADC input structures. Its unity-gain stability, 100 V/µs slew rate, and 350 ns settling time to 0.01% ensure reliable performance without external isolation resistors or compensation networks in standard ADC driver configurations.
What is the power supply range for AD8456ASTZ?
AD8456ASTZ operates from ±4.75 V to ±18 V, with rated performance specified at ±15 V. Quiescent current remains stable at 10–12 mA across this full range, enabling flexible system-level supply design. The device maintains 12.8 MHz minimum unity-gain bandwidth and 94 dB CMRR even at ±5 V operation, supporting low-voltage precision applications.
Is AD8456ASTZ pin-compatible with other AD845 variants?
Yes, AD8456ASTZ shares the same 8-lead SOIC (R-8) pinout as AD845JR-16 and AD845JCHIPS-based modules, but differs from PDIP (N-8) and CERDIP (Q-8) packages in mechanical footprint. Electrically, all AD845 variants-including AD8456ASTZ-use identical pin functions: Pins 1/8 = V+, Pin 2 = –IN, Pin 3 = +IN, Pin 4 = V–, Pin 5 = NC, Pin 6 = OUT, Pin 7 = V+.
AD8456ASTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- -
- Battery Chemistry:
- -
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AD8456ASTZ FAQ
1.How can I place an order for AD8456ASTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8456ASTZ 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 AD8456ASTZ reliable?
The price and inventory of AD8456ASTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8456ASTZ is usually 5 days.
3.What payment methods are accepted for AD8456ASTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8456ASTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8456ASTZ?
AD8456ASTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8456ASTZ 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 AD8456ASTZ?
For technical support, including AD8456ASTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8456ASTZ requirements.
6.How does Aetrix verify that AD8456ASTZ is sourced from the original manufacturer or authorized distributors?
All AD8456ASTZ 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 AD8456ASTZ meets industry standards.
7.What is the process for return or replacement of AD8456ASTZ?
All AD8456ASTZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8456ASTZ, 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 AD8456ASTZ part is unused and in its original packaging.
Return procedure for AD8456ASTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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