Overview
The ADP7142ARDZ-1.8-R7 is a CMOS, low dropout (LDO) linear regulator produced by Analog Devices Inc. This device operates from an input voltage range of 2.7 V to 40 V and provides up to 200 mA of output current, making it ideal for regulating high-performance analog and mixed-signal circuits. The ADP7142 features an advanced proprietary architecture that ensures high power supply rejection, low noise, and excellent line and load transient response with a small 2.2 µF ceramic output capacitor.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 2.7 | 40 | V | |
| Output Voltage (VOUT) | 1.2 | 5.0 | V | |
| Output Current (IOUT) | 200 | mA | ||
| Output Voltage Accuracy | -0.8 | +0.8 | % | |
| Power Supply Rejection Ratio (PSRR) at 10 kHz | 88 | dB | ||
| Output Noise (VOUT ≤ 5 V) | 11 | µV rms | ||
| Operating Supply Current (IGND) at IOUT = 0 mA | 50 | 140 | µA | |
| Shutdown Current (IGND-SD) | 1.8 | 10 | µA |
Key Features
- Low noise: 11 µV rms independent of fixed output voltage
- High power supply rejection ratio (PSRR): 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz
- Wide input voltage range: 2.7 V to 40 V
- Maximum output current: 200 mA
- Initial accuracy: ±0.8%
- User programmable soft start with an external capacitor (available in LFCSP and SOIC packages)
- Compact packages: 6-lead LFCSP (2 mm × 2 mm), 5-lead TSOT, and 8-lead SOIC
- Excellent thermal performance
- Adjustable output voltage using an external feedback divider
Applications
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
- Automotive
- High-performance analog and mixed-signal circuits
- VCO VTUNE control and precision amplifiers
Q & A
- What is the input voltage range of the ADP7142?
The input voltage range of the ADP7142 is from 2.7 V to 40 V.
- What is the maximum output current of the ADP7142?
The maximum output current of the ADP7142 is 200 mA.
- What are the available output voltage options for the ADP7142?
The ADP7142 is available in 15 fixed output voltage options ranging from 1.2 V to 5.0 V, with additional voltages available by special order.
- How is the output noise of the ADP7142?
The output noise of the ADP7142 is 11 µV rms independent of the output voltage for fixed options of 5 V or less.
- What is the power supply rejection ratio (PSRR) of the ADP7142?
The PSRR of the ADP7142 is 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz.
- Can the output voltage of the ADP7142 be adjusted?
Yes, each fixed output voltage can be adjusted above the initial set point using an external feedback divider.
- What packages are available for the ADP7142?
The ADP7142 is available in a 6-lead LFCSP, a 5-lead TSOT, and an 8-lead SOIC.
- Does the ADP7142 support user programmable soft start?
Yes, user programmable soft start with an external capacitor is available in the LFCSP and SOIC packages.
- What are some typical applications of the ADP7142?
The ADP7142 is used in communications and infrastructure, medical and healthcare, industrial and instrumentation, automotive, and high-performance analog and mixed-signal circuits.
- How does the ADP7142 achieve excellent thermal performance?
The ADP7142 achieves excellent thermal performance due to its compact package designs, such as the 6-lead LFCSP (2 mm × 2 mm), which provides a small, low-profile footprint.
