ADP7185
ADP7185
RECOMMENDED FOR NEW DESIGNS-500 mA, Ultralow Noise, High PSRR, Low Dropout Linear Regulator
- Part Models
- 10
- 1ku List Price
- Starting From $2.47
Viewing:
Overview
- Input voltage range: −2.0 V to −5.5 V
- Maximum output current: −500 mA
- Fixed output voltage options: −0.5 V to −4.5 V
- Adjustable output from −0.5 V to −VIN + 0.5 V
- Low output noise: 4 μV rms from 100 Hz to 100 kHz
- Noise spectral density: 20 nV/√Hz, 10 kHz to 1 MHz
- PSRR at −500 mA load
- 68 dB at 10 kHz
- 50 dB at 100 kHz
- 40 dB at 1 MHz
- Low dropout voltage: −190 mV typical at −500 mA load
- Initial output voltage (VOUT) accuracy: ±0.5%
- Output voltage accuracy over line, load, and temperature: ±2.2%
- Operating supply current (IGND): −0.6 mA typical at no load
- Low shutdown current: −2 μA typical at VIN = −5.5 V
- Stable with small 4.7 μF ceramic input and output capacitor
- Positive or negative enable logic
- Current-limit and thermal overload protection
- 8-lead, 2 mm × 2 mm LFCSP package
The ADP7185 is a complementary metal oxide semiconductor (CMOS), low dropout (LDO) linear regulator that operates from −2.0 V to −5.5 V and provides up to −500 mA of output current. This high output current LDO is ideal for regulation of high performance analog and mixed signal circuits operating from −0.5 V down to −4.5 V. Using an advanced proprietary architecture, the ADP7185 provides high power supple rejection ratio (PSRR) and low noise, and it achieves excellent line and load transient response with a small 4.7 μF ceramic output capacitor.
The ADP7185 is available in 15 fixed output voltage options. The following voltages are available from stock: −0.5 V, −1.0 V, −1.2 V, −1.5 V, −1.8 V, −2.0 V, −2.5 V, −3.0 V, and −3.3 V.
Additional voltages available by special order are −0.8 V, −0.9 V, −1.3 V, −2.8 V, −4.2 V, and −4.5 V. An adjustable version is also available which allows output voltages that range from −0.5 V to −VIN + 0.5 V with an external feedback divider.
The enable logic feature is capable of interfacing with positive or negative logic levels for maximum flexibility.
The ADP7185 regulator output noise is 4 μV rms independent of the output voltage. The ADP7185 is available in an 8-lead, 2 mm × 2 mm LFCSP, making it not only a very compact solution but also providing excellent thermal performance for applications requiring up to −500 mA of output current in a small, low profile footprint.
Applications
- Regulation to noise sensitive applications: analog-to-digital converters (ADCs), digital-to-analog converters (DACs), precision amplifiers
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
Documentation
Data Sheet 1
User Guide 1
Brochure 2
Student Zone Article 1
Rarely Asked Question 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADP7185ACPZN-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN0.5-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN1.0-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN1.2-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN1.5-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN1.8-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN2.0-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN2.5-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN3.0-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) | ||
| ADP7185ACPZN3.3-R7 | 8-Lead LFCSP (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3094 | RECOMMENDED FOR NEW DESIGNS | −20V, 500mA, Ultralow Noise, Ultrahigh PSRR Negative Linear Regulator |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- ADP7185
- ADP7185-0.5
- ADP7185-1
- ADP7185-1.2
- ADP7185-1.5
- ADP7185-1.8
- ADP7185-2
- ADP7185-2.5
- ADP7185-3
- ADP7185-3.3
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
ADP7183/ADP7185 Evaluation Board
Resources
Reference Designs
High Precision, Wide Bandwidth Current Measurement Signal Chain