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Renesas ISL28230CRZ
- Part No.:
- ISL28230CRZ
- Manufacturer:
- Renesas
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ISL28230CRZ.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,143
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Product details
Overview
ISL28230CRZ from Renesas Electronics is a dual-channel micropower, rail-to-rail input/output operational amplifier optimized for precision DC-coupled sensing in battery-powered systems. It delivers 40 µV max input offset voltage, 150 nV/°C max offset drift, 20 µA per amplifier quiescent current, and 400 kHz gain-bandwidth - enabling high-gain current sense and temperature measurement in handheld medical devices and industrial sensors.
For engineers reviewing the ISL28230CRZ datasheet, ISL28230CRZ pinout, ISL28230CRZ application, or ISL28230CRZ equivalent, key selection criteria include its guaranteed low-drift performance across –40°C to +125°C, DFN-8 package thermal efficiency (θJC = 12°C/W), and verified rail-to-rail operation on 1.8V–5.5V single supply or ±0.9V–±2.75V dual supply.
Technical Context
The ISL28230CRZ employs complementary CMOS input stages with parallel PMOS/NMOS transistors to achieve true rail-to-rail input swing beyond both supply rails by 100 mV, while maintaining high impedance at differential inputs up to 6.5 V. Its output stage uses common-source PMOS/NMOS devices delivering rail-to-rail swing within 50 mV of either rail into 10 kΩ.
With 150 dB open-loop gain and 1.1 µVP-P (0.01 Hz–10 Hz) input noise, the device supports stable high-gain DC amplification - demonstrated in reference designs achieving <100 nV input sensitivity - without requiring complex chopper or auto-zero architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±40 µV max - ensures ≤400 mV total DC error at G=10⁴, critical for µV-level sensor signal conditioning |
| Offset Drift | 150 nV/°C max - limits temperature-induced output drift to ≤1.5 mV/°C at G=10⁴, enabling stable long-term measurements |
| Supply Current | 20 µA per amplifier typical - enables >1-year battery life in 2xAA-powered portable instrumentation |
| Gain-Bandwidth | 400 kHz - supports closed-loop gains up to ~1000 with usable phase margin in low-noise sensor front ends |
| Rail-to-Rail I/O | Inputs swing to V− −100 mV / V+ +100 mV; outputs swing to V− +18 mV / V+ −20 mV @ 10 kΩ - maximizes dynamic range in low-voltage systems |
| Input Bias Current | 250 pA max @ 0°C–70°C - preserves accuracy in high-impedance bridge and thermistor interfaces without guard traces |
| CMRR / PSRR | 110 dB / 105 dB min - rejects supply and common-mode noise in noisy industrial environments |
Pinout & Package
ISL28230CRZ is housed in an 8-lead 3 mm × 3 mm DFN package (RoHS-compliant, exposed thermal pad). The package provides low thermal resistance (θJC = 12°C/W) and requires connection of the paddle to V− for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+_A | Non-inverting input of Amplifier A - accepts signals from V− −100 mV to V+ +100 mV with high Z (>10¹³ Ω) |
| 2 | IN−_A | Inverting input of Amplifier A - matched to IN+_A for low input offset; no internal clamp diodes |
| 3 | V− | Negative supply rail - connects to thermal pad; must be lowest potential node for ESD and thermal integrity |
| 4 | OUT_A | Output of Amplifier A - drives loads to within 18 mV of V− and 20 mV of V+ @ 10 kΩ |
| 5 | OUT_B | Output of Amplifier B - independent output stage; 15 mA short-circuit current limit protects against overload |
| 6 | IN−_B | Inverting input of Amplifier B - electrically isolated from Amplifier A; crosstalk <−140 dB @ 1 kHz |
| 7 | IN+_B | Non-inverting input of Amplifier B - identical specs to IN+_A; supports dual-sensor or differential pair topologies |
| 8 | V+ | Positive supply rail - supplies both amplifiers; PSRR ≥105 dB rejects ripple in shared power domains |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Enables direct interface to sensors operating near supply rails (e.g., 0–3.3 V thermocouple outputs) without level-shifting |
| Low 1/f noise corner | Sub-0.1 Hz corner frequency allows clean amplification of ultra-low-frequency signals (e.g., strain gauge drift monitoring) |
| High open-loop gain | 150 dB ensures <0.001% gain error at G=1000, eliminating need for external trimming in precision regulation loops |
| ESD robustness | 4 kV HBM rating protects against handling damage during PCB assembly and field service in unshielded enclosures |
| Thermal pad integration | Exposed paddle tied to V− reduces junction-to-board θJA to 53°C/W - critical for sustained operation in sealed medical housings |
Applications
| Bi-directional Current Sense | Temperature Measurement |
|---|---|
Use Scenario: High-side current monitoring in Li-ion battery protection circuits using 0.2 Ω shunt resistor. IC Role / Device Role / Timing Role: Precision difference amplifier with rail-to-rail input accepting common-mode voltages up to VBAT. Use Value: 40 µV offset enables accurate detection of ±10 mA load changes at 3.3 V supply with <1% error over –40°C to +85°C. |
Use Scenario: Linearized RTD or thermistor interface in portable patient monitors. IC Role / Device Role / Timing Role: Low-drift, low-power instrumentation amplifier front end with 250 pA bias current. Use Value: 150 nV/°C drift contributes <0.15 °C error over full range - meets Class A clinical thermometer accuracy requirements. |
| Electronic Weigh Scales | Precision Strain Gauge Sensor |
Use Scenario: Microcontroller-based platform measuring 1–5 kg loads via full-bridge load cell. IC Role / Device Role / Timing Role: First-stage gain amplifier in 24-bit sigma-delta ADC front end. Use Value: 1.1 µVP-P (0.01–10 Hz) noise floor resolves <10 µg resolution at 100 Hz sampling without averaging. |
Use Scenario: Industrial pressure transducer with 350 Ω Wheatstone bridge output. IC Role / Device Role / Timing Role: Low-bias, high-Z buffer for bridge excitation and differential amplification. Use Value: 250 pA input bias prevents >10 ppm bridge imbalance error - eliminates need for active guarding in 0.05% FS accuracy systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture (chopper-stabilized); 0.02 µV/°C drift vs. ISL28230CRZ's 150 nV/°C; higher 350 µA supply current | Better for sub-µV drift-critical DC applications (e.g., laboratory calibrators); less suitable for multi-year battery life | Choose OPA2333AIDR when drift <0.1 µV/°C is mandatory and power budget allows ≥17× higher current |
| MCP6V82-E/SN | Auto-zero topology; 0.25 µV max offset; 1.6 µVP-P (0.1–10 Hz) noise; 60 µA supply current; SOIC-8 only | Higher noise and current than ISL28230CRZ; lacks DFN thermal performance for compact sealed enclosures | Choose MCP6V82-E/SN only if legacy SOIC-8 footprint compatibility is required and thermal constraints permit |
Compared with OPA2333AIDR and MCP6V82-E/SN, the ISL28230CRZ uniquely balances ultra-low drift, micropower operation (20 µA), and DFN thermal efficiency - making it the optimal choice for space-constrained, battery-operated precision analog front ends where long-term stability and low self-heating are co-prioritized.
Availability
ISL28230CRZ is available at Aetrix Electronics and suitable for bi-directional current sense, temperature measurement, electronic weigh scales, and precision strain gauge sensor applications requiring stable component supply across industrial and medical product lifecycles.
Supply support for ISL28230CRZ 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT markets.
The ISL28230CRZ belongs to Renesas' ISL28x30 precision op amp family, engineered specifically for ultra-low-power, high-accuracy signal conditioning in battery-powered medical, test, and industrial instrumentation.
FAQ
What is the maximum operating temperature range for the ISL28230CRZ?
The ISL28230CRZ is a full-grade device rated for operation from –40°C to +125°C. This extended range is confirmed in the Ordering Information table (page 20) and Recommended Operating Conditions (page 5) of the FN7623 Rev.8.00 datasheet, making it suitable for under-hood automotive sensors and industrial control modules where ambient temperatures exceed 85°C.
Does the ISL28230CRZ require external compensation capacitors for unity-gain stability?
No, the ISL28230CRZ is internally compensated and stable at unity gain (AV = +1) across all specified load conditions, including CL ≤ 3.7 pF and RL ≥ 1 kΩ. Figure 14 in the datasheet confirms stable gain response up to 10 MHz with 3.7 pF capacitive load, and the Electrical Specifications table lists "Gain Bandwidth Product" as 400 kHz without qualification - confirming inherent unity-gain stability for the ISL28230CRZ.
How is the thermal pad on the ISL28230CRZ DFN package connected?
The exposed thermal pad on the ISL28230CRZ DFN package (L8.3x3J outline) must be soldered to the PCB and electrically connected to the V− pin (Pin 3) for optimal thermal dissipation and ESD performance. This requirement is explicitly stated in the Pin Descriptions section (page 4) and Package Outline Drawing notes (page 17), where the pad is labeled "Paddle" and designated "Connect to most negative supply."
Can the ISL28230CRZ drive capacitive loads greater than 100 pF?
Yes - the ISL28230CRZ maintains stability with capacitive loads up to at least 824 pF, as validated in Figure 14 (Gain Response vs Load Capacitance) of the datasheet. At CL = 824 pF and AV = +1, the device exhibits no peaking and retains >45° phase margin, enabling direct interface to ADC input capacitors, long cables, or filtering networks without isolation resistors.
Is the ISL28230CRZ pin-compatible with other members of the ISL28x30 family?
No - the ISL28230CRZ (DFN-8) has a different pinout than the ISL28230CUZ (MSOP-8) and ISL28230CBZ (SOIC-8), despite sharing identical electrical specifications. Pin assignments differ across packages: for example, V+ is Pin 8 in DFN but Pin 8 in SOIC/MSOP is OUT_B. This is confirmed in the Pin Assignments diagrams (pages 3–4) and Package Outline Drawings (pages 13–19) of FN7623 Rev.8.00.
ISL28230CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 400 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 20µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
ISL28230CRZ FAQ
1.How can I place an order for ISL28230CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL28230CRZ 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 ISL28230CRZ reliable?
The price and inventory of ISL28230CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL28230CRZ is usually 5 days.
3.What payment methods are accepted for ISL28230CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL28230CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL28230CRZ?
ISL28230CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL28230CRZ 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 ISL28230CRZ?
For technical support, including ISL28230CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL28230CRZ requirements.
6.How does Aetrix verify that ISL28230CRZ is sourced from the original manufacturer or authorized distributors?
All ISL28230CRZ 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 ISL28230CRZ meets industry standards.
7.What is the process for return or replacement of ISL28230CRZ?
All ISL28230CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL28230CRZ, 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 ISL28230CRZ part is unused and in its original packaging.
Return procedure for ISL28230CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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