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Analog Devices Inc. AD8553ARMZ
- Part No.:
- AD8553ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8553ARMZ.pdf
- Description:
- IC INST AMP 1 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:294
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Product details
Overview
AD8553ARMZ from Analog Devices is a precision auto-zero instrumentation amplifier optimized for low-noise, low-drift signal conditioning in single-supply systems. It delivers 20 μV max input offset voltage, 0.1 μV/°C max drift, 120 dB min CMR at G = 100, rail-to-rail output, and shutdown mode drawing <4 μA - enabling high-accuracy strain gauge and thermocouple amplification in portable medical instruments and weigh scales.
For engineers reviewing the AD8553ARMZ datasheet, AD8553ARMZ pinout, AD8553ARMZ application, or AD8553ARMZ equivalent, this page provides verified technical context, validated pin functions, real-world use-value per application, and two confirmed alternative parts with documented functional and application-level differences - all aligned to the exact AD8553ARMZ-REEL ordering variant.
Technical Context
The AD8553ARMZ employs a current-mode correction architecture that eliminates need for laser-trimmed on-die resistors while achieving sub-μV/°C drift and 0.7 μV p-p (0.01 Hz–10 Hz) noise. Its internal 60 kHz autocorrection clock continuously nulls offset and 1/f noise without external calibration.
It operates from 1.8 V to 5.5 V, supports gain from 0.1 to 10,000 via external R1/R2, and features a dedicated VFB pin (Pin 5) allowing direct access to the internal signal current - enabling configurable voltage- or current-output operation without topology change.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 20 μV max at G = 100 - ensures ≤0.02% error in 100 mV full-scale sensor outputs without trimming. |
| Offset Drift | 0.1 μV/°C max - maintains <1 μV total drift over −40°C to +85°C industrial range. |
| CMR | 120 dB min at G = 100 - rejects >10⁶× common-mode interference in bridge-based sensors. |
| Noise (0.01–10 Hz) | 0.7 μV p-p - enables resolution of sub-μV dc signals in thermocouple and pressure transducer front-ends. |
| Supply Range | 1.8 V to 5.5 V - supports battery-powered portables (e.g., handheld diagnostics) and 3.3 V/5 V industrial rails. |
| Shutdown Current | <4 μA - reduces system standby power by >99.6% vs. active mode (1.3 mA typical). |
| Bandwidth | 1 kHz at G = 1–1000 - sufficient for static and quasi-static measurements (strain, weight, temperature). |
Pinout & Package
AD8553ARMZ is housed in a Pb-free, 10-lead MSOP (RM-10) package measuring 3.0 mm × 3.0 mm × 0.85 mm, with exposed pad for thermal enhancement and JEDEC MO-187-BA compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RGA) | Gain-setting resistor A terminal | Connects to one end of external R1; symmetric layout critical for CMR preservation at G < 10. |
| 2 (VINP) | Noninverting input | Accepts high-impedance differential sensor inputs; input bias current ≤1 nA minimizes loading error. |
| 3 (VCC) | Positive supply | Supports 1.8–5.5 V; requires 0.1 μF ceramic bypass capacitor placed adjacent to pin. |
| 4 (VO) | Rail-to-rail output | Drives 10 kΩ loads; capable of sourcing/sinking ±35 mA; high-Z in shutdown mode enables multiplexing. |
| 5 (VFB) | Feedback node / current output tap | Provides access to internal signal current; enables current-output configuration or external filtering control. |
| 6 (ENABLE) | Shutdown control input | Logic-high (≥2.4 V @ 5 V, ≥1.4 V @ 1.8 V) enables operation; logic-low disables and reduces IDD to <4 μA. |
| 7 (VREF) | Output reference level | Sets output DC bias; draws only ~20 pA, eliminating need for buffer amplifier even with series resistance. |
| 8 (GND) | Analog ground | Primary return path; must be low-impedance and separated from digital ground to preserve PSR/CMR. |
| 9 (VINN) | Inverting input | Differential complement to VINP; matched input impedance preserves CMR across frequency. |
| 10 (RGB) | Gain-setting resistor B terminal | Connects to other end of external R1; trace symmetry with Pin 1 essential for gain accuracy <0.3%. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero architecture with 60 kHz correction clock | Eliminates 1/f noise and drift without external calibration; enables stable dc performance over time and temperature. |
| Current-mode gain setting (G = 2 × R2/R1) | Decouples gain accuracy from resistor matching - CMR remains unaffected by R1/R2 mismatch. |
| VREF pin with 20 pA input current | Permits direct connection to resistor dividers or references without buffer amplifier, saving board space and cost. |
| Internal signal current access (Pin 5) | Allows reconfiguration as current-output device or integration into custom feedback loops without redesign. |
| Shutdown mode with <4 μA quiescent current | Enables power-gating in multi-channel sensor arrays; output goes high-Z, supporting analog multiplexing. |
Applications
| Strain Gauge Amplification | Weigh Scale Front-End |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil or foil strain gauges in load cells. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain (10–1000), rail-to-rail output, and ultra-low offset to resolve microstrain-level changes. Use Value: 20 μV offset and 0.1 μV/°C drift ensure ≤0.002% FS error over temperature - meeting Class III legal-for-trade metrology requirements. |
Use Scenario: Signal conditioning for multi-cell platform scales used in retail, warehouse, and industrial weighing. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage driving 24-bit sigma-delta ADCs with integrated PGA and reference. Use Value: 0.7 μV p-p (0.01–10 Hz) noise enables 200,000+ count resolution without external averaging or filtering. |
| Thermocouple Amplifier | Laser Diode Control Loop |
|
Use Scenario: Cold-junction compensation and amplification of Type-K/J thermocouple outputs in portable medical monitors and HVAC sensors. IC Role / Device Role / Timing Role: High-CMR (120 dB) amplifier rejecting EMI from switching power supplies while preserving sub-μV thermoelectric signals. Use Value: 120 dB CMR at 50/60 Hz suppresses line-frequency pickup; 1.8 V operation extends battery life in handheld units. |
Use Scenario: Closed-loop current regulation for precision laser diodes in optical coherence tomography (OCT) and fiber alignment systems. IC Role / Device Role / Timing Role: Low-drift, low-noise transimpedance amplifier converting photodiode current to stable voltage feedback signal. Use Value: 0.1 μV/°C drift prevents thermal drift-induced laser power drift; shutdown mode enables rapid channel switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8420ARMZ | Fixed gain options (10, 100, 1000); no shutdown; 35 μV max offset; 0.3 μV/°C drift | Better suited for fixed-gain, high-volume industrial sensors where shutdown is unnecessary | Select when gain stability and production cost outweigh need for programmability and ultra-low power. |
| INA333AIDRGT | Zero-drift architecture; 25 μV max offset; 0.1 μV/°C drift; 1.8–5.5 V supply; no VFB pin | Lacks current-output capability and VFB access; optimized for lowest possible cost in consumer-grade sensors | Choose when VFB functionality is unused and board space is constrained - same footprint but no RGA/RGB pins. |
Compared with AD8553ARMZ, AD8420ARMZ trades programmable gain and shutdown for lower cost and higher gain accuracy in fixed configurations, while INA333AIDRGT offers comparable drift and supply range but omits the VFB node and gain-setting flexibility - making AD8553ARMZ uniquely suited for multi-gain, multiplexed, or current-output sensor systems.
Availability
AD8553ARMZ is available at Aetrix Electronics and suitable for strain gauge amplification, weigh scale front-ends, and thermocouple signal conditioning requiring stable component supply across industrial and medical OEM programs.
Supply support for AD8553ARMZ 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 AD8553ARMZ belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically for ultra-low-drift, low-noise dc-coupled measurement in resource-constrained portable and industrial systems.
FAQ
What is the maximum gain achievable with AD8553ARMZ and how is it set?
The AD8553ARMZ supports gains from 0.1 to 10,000, set externally using two resistors: G = 2 × R2/R1. For G = 1000, R1 = 3.92 kΩ and R2 = 1.96 MΩ are recommended. Gain accuracy depends on R1/R2 matching, but CMR remains unaffected by resistor mismatch - a key advantage of its current-mode architecture. The AD8553ARMZ datasheet specifies resistor values and tolerances for each target gain in Table 5.
Does AD8553ARMZ require external filtering, and if so, why?
Yes, AD8553ARMZ requires external RC filtering: C2 across R2 (Pin 5 to VREF) and optionally C3/R3 at VO. This is mandatory to suppress 60 kHz autocorrection clock feedthrough and achieve the specified 0.7 μV p-p noise (0.01–10 Hz). Without C2, output noise increases significantly. For ADC driving, R3 = 100 Ω and C3 = 1 μF form an antialiasing filter - a requirement explicitly stated in the AD8553ARMZ application circuits (Figure 31–36).
Can AD8553ARMZ operate from a 1.8 V supply while maintaining full specifications?
Yes, AD8553ARMZ is fully specified from 1.8 V to 5.5 V. At 1.8 V, it maintains 20 μV max offset (G = 100), 0.25 μV/°C max drift, 100 dB min CMR, and 0.7 μV p-p noise (0.01–10 Hz). Output swing is reduced to 0.075 V to 1.725 V, and short-circuit current drops to ±5 mA - all verified in Table 2 of the AD8553ARMZ datasheet under VS = 1.8 V conditions.
What is the function of Pin 5 (VFB) on AD8553ARMZ beyond feedback?
Pin 5 (VFB) is the internal current-summing node of the AD8553ARMZ's current-mode amplifier. Beyond standard feedback, it allows the device to be configured as a precision voltage-to-current converter (0–30 μA range, Figure 35) or integrated into custom feedback topologies. This dual-role capability - voltage-output amplifier or current-output transducer - is unique to the AD8553ARMZ among Analog Devices' instrumentation amplifiers and enables novel sensor interface architectures.
How does AD8553ARMZ handle reference voltage sourcing, and is a buffer required?
No buffer is required for the VREF pin (Pin 7) of AD8553ARMZ because its input current is only ~20 pA. This allows direct connection to resistor dividers (e.g., 100 kΩ/100 kΩ from VCC) or precision references without degrading CMR - unlike conventional three-op-amp instrumentation amps. The AD8553ARMZ datasheet confirms parasitic resistance in series with VREF does not degrade CMR, reducing BOM count and PCB area versus alternatives like AD620 or INA128.
AD8553ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 400 pA
- Voltage - Input Offset:
- 120 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
AD8553ARMZ FAQ
1.How can I place an order for AD8553ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8553ARMZ 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 AD8553ARMZ reliable?
The price and inventory of AD8553ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8553ARMZ is usually 5 days.
3.What payment methods are accepted for AD8553ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8553ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8553ARMZ?
AD8553ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8553ARMZ 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 AD8553ARMZ?
For technical support, including AD8553ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8553ARMZ requirements.
6.How does Aetrix verify that AD8553ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8553ARMZ 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 AD8553ARMZ meets industry standards.
7.What is the process for return or replacement of AD8553ARMZ?
All AD8553ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8553ARMZ, 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 AD8553ARMZ part is unused and in its original packaging.
Return procedure for AD8553ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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