My Inquiry
My Account
Analog Devices Inc. AD8045ACPZ-R2
- Part No.:
- AD8045ACPZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
AD8045ACPZ-R2.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:242
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8045ACPZ-R2 from Analog Devices is a unity-gain stable, voltage-feedback operational amplifier optimized for ultralow distortion, high-speed signal conditioning in precision RF and data acquisition systems. It delivers 1 GHz −3 dB bandwidth (G = +1), 1350 V/µs slew rate, and −90 dBc SFDR at 20 MHz, enabling use as an ADC driver in 14-bit, 65 MSPS systems like the AD9244.
For engineers reviewing the AD8045ACPZ-R2 datasheet, AD8045ACPZ-R2 pinout, AD8045ACPZ-R2 application, or AD8045ACPZ-R2 equivalent, key selection criteria include harmonic distortion performance at 5–70 MHz, low 3 nV/√Hz input voltage noise, thermal management via exposed paddle, and compatibility with ±5 V or single +5 V supply operation.
Technical Context
The AD8045ACPZ-R2 employs Analog Devices' second-generation XFCB bipolar process and an H-bridge input stage to achieve simultaneous high slew rate (1350 V/µs) and low distortion (−101 dBc HD2/HD3 at 5 MHz). Its low-distortion LFCSP pinout physically separates +IN from −VS to suppress second-harmonic generation and integrates a dedicated feedback pin to minimize parasitic inductance in high-frequency layouts.
It operates across −40°C to +125°C with a wide 3.3 V to 12 V supply range and supports both dual-supply (±5 V) and single-supply (+5 V) configurations. The exposed paddle must be left floating or connected to −VS - not ground - to maintain specified distortion and thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 1000 MHz at G = +1, ±5 V supply - enables baseband-to-IF amplification up to 1 GHz without gain peaking. |
| Slew Rate | 1350 V/µs - supports full-scale 2 V step settling in <8 ns, critical for driving fast ADCs without slewing-induced distortion. |
| Input Voltage Noise | 3 nV/√Hz at 100 kHz - preserves SNR in low-amplitude, wideband sensor and IF amplifier stages. |
| Harmonic Distortion | −101 dBc HD3 at 5 MHz (LFCSP) - meets stringent SFDR requirements for ultrasound and ATE instrumentation. |
| Supply Current | 15 mA typical - balances power efficiency with high-speed performance in thermally constrained LFCSP layouts. |
| Operating Temp Range | −40°C to +125°C - qualified for extended industrial and automotive under-hood signal chain applications. |
| Input Offset Voltage | 1.0 mV max - ensures dc accuracy in active filter and DAC buffer configurations without external trimming. |
Pinout & Package
The AD8045ACPZ-R2 is housed in a 3 mm × 3 mm, 8-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle (EPAD), offering θJA = 93°C/W on a 4-layer JEDEC board. The EPAD must be electrically isolated or connected to −VS - not ground - to preserve distortion specs and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | FEEDBACK | Dedicated feedback node - enables shortest possible trace to inverting input, minimizing layout-induced phase shift and ringing. |
| 2 | −IN | Inverting input - referenced to feedback network; requires matched source impedance to +IN for optimal CMRR. |
| 3 | +IN | Noninverting input - physically isolated from −VS pin to reduce second-harmonic coupling in LFCSP variant. |
| 4 | −VS | Negative supply - EPAD connection point; grounding this pin degrades HD2 by >10 dB. |
| 5, 8 | NIC | No internal connection - must remain unconnected; no routing or copper fill permitted. |
| 6 | OUTPUT | Output driver - capable of sourcing/sinking 70/140 mA; requires local 0.1 µF bypass capacitor within 2 mm. |
| 7 | +VS | Positive supply - bypassed independently from −VS; PSRR >65 dB up to 100 kHz. |
| EPAD | Thermal & Electrical Reference | Exposed paddle - must be soldered to PCB thermal pad tied to −VS or left floating; provides 35°C/W θJC path. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Distortion LFCSP Pinout | Separates +IN and −VS pins to reduce second-harmonic generation by >8 dB vs. standard SOIC layout. |
| Dedicated Feedback Pin | Eliminates need for output-to-inverting-input trace routing, cutting parasitic inductance by >50% in compact layouts. |
| Exposed Paddle Thermal Path | Reduces junction-to-board thermal resistance to 35°C/W, enabling 150 mW continuous dissipation at +85°C ambient. |
| Wide Supply Range | Operates from +3.3 V single supply to ±6 V dual supply - supports legacy ±5 V systems and modern low-voltage signal chains. |
| High Slew Rate / Low Noise Trade-off | 1350 V/µs slew rate achieved with only 3 nV/√Hz input voltage noise - rare combination for GHz-class op amps. |
Applications
| Ultrasound Front-End Amplifier | High-Speed ADC Driver |
|---|---|
Use Scenario: Amplifying weak, wideband echo signals (1–15 MHz) from piezoelectric transducers before digitization. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain block with dc-coupled signal path and 1 GHz bandwidth to preserve transient fidelity. Use Value: −101 dBc HD3 at 5 MHz ensures clean spectral representation of tissue harmonics, directly improving image resolution and contrast. | Use Scenario: Driving the analog inputs of 14-bit, 65 MSPS ADCs such as the AD9244 in dc-coupled differential mode. IC Role / Device Role / Timing Role: Precision differential driver providing matched gain, phase, and settling (<7.5 ns to 0.1%) across both channels. Use Value: SFDR of −90 dBc at 20 MHz enables >78 dB ENOB at Nyquist, exceeding ADC's intrinsic linearity limit. |
| Active IF Filter (90 MHz LPF) | ATE Signal Source Conditioning |
Use Scenario: Implementing a 4-pole Sallen-Key low-pass filter at 90 MHz for antialiasing or IF channel selection. IC Role / Device Role / Timing Role: High-slew-rate gain stage enabling full-power bandwidth >1200 V/µs to avoid slew-limited distortion at 2 Vp-p. Use Value: 1350 V/µs slew rate and 400 MHz G = +2 bandwidth ensure flat group delay and minimal passband ripple up to 90 MHz. | Use Scenario: Generating precise, low-jitter test waveforms (sine, pulse, ramp) in automated test equipment with <0.01% THD. IC Role / Device Role / Timing Role: Output buffer and level shifter delivering programmable amplitude/offset into 50 Ω loads with nanosecond settling. Use Value: 7.5 ns 0.1% settling time and −63 dBc HD3 at 70 MHz support multi-tone stimulus generation without intermodulation artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Lower 1.5 nV/√Hz noise but 700 MHz bandwidth and −82 dBc HD3 at 20 MHz; no exposed paddle. | Better for ultra-low-noise preamp stages below 500 MHz; unsuitable for >1 GHz ADC drivers or 90 MHz filters. | Select LMH6629MA/NOPB when input noise dominates system SNR and bandwidth ≤700 MHz suffices. |
| ADA4898-1ARZ | 1 GHz bandwidth, but 4.5 nV/√Hz noise and −85 dBc HD3 at 20 MHz; SOIC-8 only, no LFCSP option. | Preferred for dual-supply precision instrumentation where layout space allows SOIC; lacks LFCSP thermal advantage. | Choose ADA4898-1ARZ for cost-sensitive, non-thermal-constrained designs requiring laser-trimmed offset (<100 µV). |
Compared with LMH6629MA/NOPB and ADA4898-1ARZ, the AD8045ACPZ-R2 uniquely combines 1 GHz bandwidth, −101 dBc HD3, and LFCSP thermal performance - making it the only choice for compact, high-SFDR ADC driver and IF filter applications demanding both speed and spectral purity.
Availability
AD8045ACPZ-R2 is available at Aetrix Electronics and suitable for ultrasound front-end amplifiers, high-speed ADC drivers, active IF filters, and ATE signal sources requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for AD8045ACPZ-R2 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, serving precision instrumentation, communications, and industrial markets since 1965.
The AD8045ACPZ-R2 belongs to Analog Devices' high-speed op amp product line, engineered specifically for applications demanding simultaneous GHz bandwidth, ultralow distortion, and robust thermal performance in miniaturized packages.
FAQ
What is the correct biasing method for the exposed paddle on the AD8045ACPZ-R2?
The exposed paddle (EPAD) on the AD8045ACPZ-R2 must be either left electrically floating or connected directly to the −VS supply rail - never to ground or +VS. Connecting EPAD to ground degrades second-harmonic distortion by >10 dB and increases thermal resistance. Soldering the EPAD to a PCB thermal pad tied to −VS optimizes both distortion performance and thermal dissipation, achieving θJC = 35°C/W.
Can the AD8045ACPZ-R2 operate from a single +5 V supply?
Yes, the AD8045ACPZ-R2 supports single +5 V operation with input common-mode range from 1.2 V to 3.8 V and output swing of 1.1 V to 4.0 V (RL = 1 kΩ). However, harmonic distortion degrades - e.g., HD3 falls from −101 dBc (±5 V) to −83 dBc at 5 MHz - due to reduced headroom. For optimal SFDR, dual ±5 V supply is recommended.
Does the AD8045ACPZ-R2 require external compensation for unity-gain stability?
No, the AD8045ACPZ-R2 is internally compensated for unity-gain stability. It achieves 1 GHz −3 dB bandwidth with G = +1 and exhibits no peaking or ringing in standard noninverting configurations. External series resistor (RS) at the input is recommended only for high-frequency gain peaking suppression - not for stability - and is unnecessary in most G = +1 layouts.
How does the dedicated FEEDBACK pin (Pin 1) improve layout in high-frequency circuits?
The dedicated FEEDBACK pin on the AD8045ACPZ-R2 eliminates the need to route feedback from OUTPUT (Pin 6) back to −IN (Pin 2), reducing trace length by >70% and parasitic inductance by >50%. This minimizes phase lag in the feedback loop, preserving phase margin above 45° up to 500 MHz and preventing oscillation in compact RF layouts.
What is the maximum capacitive load the AD8045ACPZ-R2 can drive without external compensation?
The AD8045ACPZ-R2 can drive up to 15 pF (with 30% overshoot) under +5 V supply and 18 pF under ±5 V supply in G = +2 configuration. Driving larger capacitive loads - such as ADC input capacitance (>20 pF) - requires a series "snubber" resistor (RSNUB) between OUTPUT and load to dampen resonance. Typical RSNUB values range from 5 Ω to 22 Ω, selected per load capacitance and required settling behavior.
AD8045ACPZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1350V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 GHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 16mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 3.3 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LFCSP (3x3)
AD8045ACPZ-R2 FAQ
1.How can I place an order for AD8045ACPZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8045ACPZ-R2 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 AD8045ACPZ-R2 reliable?
The price and inventory of AD8045ACPZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8045ACPZ-R2 is usually 5 days.
3.What payment methods are accepted for AD8045ACPZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8045ACPZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8045ACPZ-R2?
AD8045ACPZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8045ACPZ-R2 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 AD8045ACPZ-R2?
For technical support, including AD8045ACPZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8045ACPZ-R2 requirements.
6.How does Aetrix verify that AD8045ACPZ-R2 is sourced from the original manufacturer or authorized distributors?
All AD8045ACPZ-R2 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 AD8045ACPZ-R2 meets industry standards.
7.What is the process for return or replacement of AD8045ACPZ-R2?
All AD8045ACPZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD8045ACPZ-R2, 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 AD8045ACPZ-R2 part is unused and in its original packaging.
Return procedure for AD8045ACPZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8045ACPZ-R2 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
