ADP1761

RECOMMENDED FOR NEW DESIGNS

1 A, Low V_IN, Low Noise, CMOS Linear Regulator

Data Sheet (Rev. D) Product Selection Table

Part Models: 18
1ku List Price: Starting From $3.64

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Overview

1 A maximum output current
Low input voltage supply range
- V_IN = 1.10 V to 1.98 V, no external bias supply required
Fixed output voltage range: V_{OUT_FIXED} = 0.9 V to 1.5 V
Adjustable output voltage range: V_{OUT_ADJ} = 0.5 V to 1.5 V
Ultralow noise: 2 μV rms, 100 Hz to 100 kHz
Noise spectral density
- 4 nV/√Hz at 10 kHz
- 3 nV/√Hz at 100 kHz
Low dropout voltage: 30 mV typical at 1 A load
Operating supply current: 4.5 mA typical at no load

±1.5% fixed output voltage accuracy over line, load, and temperature
Excellent power supply rejection ratio (PSRR) performance
- 67 dB typical at 10 kHz at 1 A load
- 51 dB typical at 100 kHz at 1 A load
Excellent load/line transient response
Soft start to reduce inrush current
Optimized for small 10 μF ceramic capacitors
Current-limit and thermal overload protection
Power-good indicator
Precision enable
16-lead, 3 mm × 3 mm LFCSP package
AEC-Q100 qualified for automotive applications

The ADP1761 is a low noise, low dropout (LDO) linear regulator. It is designed to operate from a single input supply with an input voltage as low as 1.10 V, without the requirement of an external bias supply to increase efficiency and provide up to 1 A of output current.

The low 30 mV typical dropout voltage at a 1 A load allows the ADP1761 to operate with a small headroom while maintaining regulation and providing better efficiency. The ADP1761 is optimized for stable operation with small 10 μF ceramic output capacitors.

The ADP1761 delivers optimal transient performance with minimal board area.

The ADP1761 is available in fixed output voltages ranging from 0.9 V to 1.5 V. The output of the adjustable output model can be set from 0.5 V to 1.5 V through an external resistor connected between VADJ and ground.

The ADP1761 has an externally programmable soft start time by connecting a capacitor to the SS pin. Short-circuit and thermal overload protection circuits prevent damage in adverse conditions. The ADP1761 is available in a small 16-lead LFCSP package for the smallest footprint solution to meet a variety of applications.

APPLICATIONS

Regulation to noise sensitive applications such as radio frequency (RF) transceivers, analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuits, phase-locked loops (PLLs), voltage controlled oscillators (VCOs) and clocking integrated circuits
Field-programmable gate array (FPGA) and digital signal processor (DSP) supplies
Medical and healthcare
Industrial and instrumentation
Automotive

Part Models: 18
1ku List Price: Starting From $3.64

Documentation

Data Sheet 1

ADP1761: 1 A, Low V_IN, Low Noise, CMOS Linear Regulator Data Sheet (Rev.D) 03/14/2016

User Guide 1

UG-954: Evaluating the ADP1761/ADP1762/ADP1763 Low VIN, Low Noise, CMOS Linear Regulators (Rev.0) 04/18/2016

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
ADP1761ACPZ-0.9-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-1.0-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-1.1-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-1.2-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-1.3-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-1.5-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ0.95-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761ACPZ1.25-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-0.9-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-1.0-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-1.1-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-1.2-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-1.3-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-1.5-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ0.95-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADP1761WACPZ1.25-R7	16-Lead LFCSP (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

ADP1761
ADP1761-0.9
ADP1761-0.95
ADP1761-1.0
ADP1761-1.1
ADP1761-1.2
ADP1761-1.25
ADP1761-1.3
ADP1761-1.5

ADI Linear Regulator Design Tool and Parametric Search

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Evaluation Kits

Direct RF to Baseband Transmit Radio

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Features and Benefits

TX
- 16-bit 12GSPS RFDAC
- JESD204B Interface
  - 8 lanes up to 12.5Gbps
- 1x/2x/4x/6x/8x/12x/16x/24x/32x Interpolation
- 64-bit NCO at max rate
- Analog Modes of Operation:
  - Normal Mode: 6GSPS DAC rate
    - Synthesis up to 2.5GHz (1st Nyquist)
  - Mix Mode: 6GSPS DAC rate
    - Synthesis in 2nd & 3rd Nyquist zones
  - 2X Normal Mode: 12GSPS DAC rate
    - Synthesis up to 6GHz (1st Nyquist)
  - Excellent dynamic performance
RX
- 3.2GHz full power bandwidth at 2.5GSPS
  - Noise Density = -149.5dBFs/Hz, ENOB = 9.5 bits
  - SFDR = 77 dBc at 1GHz Ain (2.5Gsps)
  - SFDR = 77dBc at 1.8GHz Ain (2.5Gsps)
- +/-0.3 LSB DNL, +/-1.0 LSB INL
- Dual supplies : 1.3V and 2.5V
- 8 or 6 Lane JESD204B Outputs
- Programmable clipping threshold for Fast Detect output
- Two Integrated wide band digital down converters (DDC) per channel
  - 10-bit complex NCO
  - 2 cascaded half band filters (dec/8, dec/16)
- Timestamp for synchronous processing alignment
  - SYSREF Setup/Hold detector
- Programmable Interrupt (IRQ) event monitor

Product Details

The AD-FMComms11-EBZ board is a system platform board for communication infrastructure applications that demonstrates the Direct to RF (DRF) transmitter and observation receiver architecture. Using high sample rate RFDAC(s) and RFADC(s), a number of components in previous generation transmitters can be eliminated, such as mixers, modulators, IF amplifiers and filters. The objective being to bring the ADC or DAC as close to the antenna as possible, leading to possibly more cost effective and efficient communications solution.

It is composed of multi-GSPS RF ADC and DAC, AD9625 and AD9162 respectively. The transmit path contains a balun, low pass filter, gain block and variable attenuation to produce an output appropriate for a power amplifier module. Along the observation path, the PA output is coupled back into the board through a variable attenuator, a balun and finally the ADC. Clock management is taken care of on board; all the necessary clocks are generated from a reference. Power management is present as well.

Resources

AD-FMCOMMS11-EBZ User Guide
5/31/2019

AD-FMCOMMS11-EBZ Design & Integration Files
3/8/2023

ADP1761/ADP1762/ADP1763 Evaluation Board

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Features and Benefits

Input voltage range: 1.1 V to 1.98 V
Output current range
– ADP1761: 0 mA to 1 A
– ADP1762: 0 mA to 2 A
– ADP1763: 0 mA to 3 A
Output voltage accuracy: ±1.5%
Operating temperature range: −40°C to +125°C

Product Details

The ADP1761, ADP1762, and ADP1763 evaluation boards demonstrate the functionality of the ADP1761, ADP1762, and ADP1763 series of linear regulators.

Simple device measurements, such as line and load regulation, dropout voltage, and ground current, are demonstrated with only a single voltage supply, a voltmeter, an ammeter, and load resistors.

For full details on the ADP1761, ADP1762, and ADP1763 line regulators, see the ADP1761, ADP1762, and ADP1763 data sheets, which should be consulted in conjunction with the user guide, UG-954, when using this evaluation board.