Interested in ADM7151 regulator? - diyAudio
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Old 31st March 2014, 01:20 PM   #1
Nikitas is offline Nikitas  Greece
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Default Interested in ADM7151 regulator?

Analog Devices produces a new regulator ADM7151 (adjustable), ADM7150 (fixed voltages) which has better specifications than TI's TPS7a4700.
Actually as far as I know, this is the best performer today.

I'm planning to make some PCBs to test them with my circuits, using the reference design from the datasheet with a couple minor additions (extra cap, resistor+led for indication). And I was wondering if anybody else is interested in it?

As you already know the more we make, less the cost.

Plus, it comes in SOIC package which is diy-friendly.

Here's the datasheet:
http://www.analog.com/static/importe...ts/ADM7151.pdf

And some features:

Input voltage range: 4.5 V to 16 V
Maximum output current: 800 mA
Adjustable output from 1.5 V to 5.1 V
Low noise
1.0 V rms total integrated noise from 100 Hz to 100 kHz
1.6 V rms total integrated noise from 10 Hz to 100 kHz
Noise spectral density: 1.7 nV√Hz from 10 kHz to 1 MHz
Power supply rejection ratio (PSRR) at 400 mA load
>90 dB from 1 kHz to 100 kHz, VOUT = 5 V
>60 dB at 1 MHz, VOUT = 5 V
Dropout voltage: 0.6 V at VOUT = 5 V, 800 mA load
Initial voltage accuracy: 1%
Voltage accuracy over line, load and temperature: 2%
Quiescent current (IGND): 4.3 mA at no load
Low shutdown current: 0.1 A
Stable with a 10 F ceramic output capacitor
8-lead LFCSP package and 8-lead SOIC package
APPLICATIONS
Regulated power noise sensitive applications
RF mixers, phase-locked loops (PLLs), voltage-controlled
oscillators (VCOs), and PLLs with integrated VCOs
Clock distribution circuits
Ultrasound and other imaging applications
High speed RF transceivers
High speed, 16-bit or greater ADCs
Communications and infrastructure
Cable digital-to-analog converter (DAC) drivers
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Last edited by Nikitas; 31st March 2014 at 01:52 PM.
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Old 31st March 2014, 04:24 PM   #2
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Default PCB for ADM7150

Actually I have purchased 10 pcs ADM7150 and is preparing to make PCBs for 117 and 78xx pinout. Since I don't know how to use PCB layout software, I will go to an electronic shop in Shenzhen (China) in the next few days and ask them to do it for me. I am wondering should I use single side or double sides PCB because double sides cost more than 2 times of single side. What is your opinion?
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Old 31st March 2014, 04:39 PM   #3
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Default Humidity control for ADM7150

Why is it so straight on humidity control of this component? I never received a package with such warning before.
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Old 31st March 2014, 04:54 PM   #4
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I will be using the regulator to drive my DAC that I am using Dexa at this moment. Dexa is excellent but expensive that I would like to try out the differences between Dexa and ADM7150.

The PCB should accomodate the necessary 1uF cermaic and 10uF tantalum through hole capacitors. I don't think I have steady hands to hand solder SMD caps. Do you think it makes a different between through hole and SMD parts? What about making PCBs to accomodate both through hole and SMD parts?
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Old 31st March 2014, 06:11 PM   #5
Nikitas is offline Nikitas  Greece
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My plan is to use double sided pcb with smd components. I don't think that you can get away with one side only.

With regs it doesn't make a huge difference if it is through hole/smd.
The major advantage is size.

If you make a pcb with through hole & smd, then what is the point?

But I am not planning to use the super tiny smd parts. I think that for example tantalum caps and 1206 resistors and easy to solder.
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Old 31st March 2014, 07:37 PM   #6
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I am thinking a group buy that if the PCB can accomodate both through hole and smd parts, it could fit diyer with and without steady hands.
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Old 31st March 2014, 07:44 PM   #7
Nikitas is offline Nikitas  Greece
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Let's see first if there is enough interest to make it a gb.
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Old 4th April 2014, 10:29 PM   #8
Nikitas is offline Nikitas  Greece
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pcb.jpgpcb2.jpg

I'm going to add top and bottom ground planes, I didn't do it yet because nothing else would appear in the screencap.
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Old 5th April 2014, 10:23 AM   #9
DQ828 is offline DQ828  Australia
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I'm interested are you planning to drive yours from a SMPSU?
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Old 5th April 2014, 11:31 AM   #10
Nikitas is offline Nikitas  Greece
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Yes with SMPS. I want to try three different of those that I have and see the results. One is a standard 5v smps for charging my phone, and the other two are 9 and 6v marked as "audio grade".

The plan is to power a buffalo dac and raspberry pi. When Russ White's cap is ready I'm going to switch to that.

I'm going to send today the gerbers for manufacture, I will have them back in about 2 weeks.
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Last edited by Nikitas; 5th April 2014 at 11:34 AM.
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