Imaging AFEs Forum - Recent Threads

Need Help for Ultrasonic Imaging Applications of LM96570/LM96550/LM96530/AFE5805

SHIWEI WU — Thu, 09 May 2013 06:44:27 GMT

Hi, everyone. I recently use a set of TI product for ultrasonic imaging. Here are several problem that I have met. Really Need your help T_T !

Q1: I have already read Mariusz’s post (http://e2e.ti.com/support/other_analog/imaging_afes/f/239/t/230591.aspx) about how to get two or more chips LM96570 synchronous in multichannel application. So I have the same doubt because I need to use four chip with my application.

Q2: There are so many supply voltages for LM96550 to make it work well. How to simplify this supply design? Take my design for example. And please let me know if there is any unreasonable point.

I use a power-supply module to supply +50V and -50V; then use LDO to generate +40V and -40V from +50V and -50V respectively; use LDO to generate +10V and -10V from input power supply +12V and -12V respectively; and input power supply +3.3V.(Power +12V, -12V, +3.3V, is external input power)

Q3: A serious problem, that the power supply pin called VDD/VSS is break through being shorted with GND, is occurred during our firstly use. Why? It confuses me.

The schematic is showed as follow figure 1. The LM96550 is configured “CW” mode, so its output pulse is default 10MHz positive & negative high voltage pulse, as we measured in figure 2. When power on, this pulse is driving the LM96530. And the supply current grows high abnormally. Then we power it down immediately, and find that the power supply pin VDD/VSS have already been break through, shorted with GND.

It doesn’t make sense that the LM96530 is declared to accept the continuous wave up to +/- 60V in datasheet. But do NOT give the maximum acceptable frequency of continuous wave. So I guess that whether the frequency is too high that causes fatal damage to LM96530!!! Anyone can confirm my assumption.

Figure 1.

Figure 2.

Q4: LM96530 can be work well under single trigger. We find a fact that LM96530 can NOT be completely switched off. See figure 3, we input a high voltage pulse (the blue line indicated, almost -50V which is lasting 250ns) which results in some leakage peak (the yellow line indicated) at high voltage pulse edge location.

Figure 3.

Q5: Following Q4, we switch on one channel of LM96530. The output of LM96530 shows as figure 4, with a strong oscillation lasting about 5 us. When we put a 100nF cap between LM96530 output and GND close to LM96530, the result shows in figure 5. The effect is remarkable. So is it recommended to put such a cap at the each output of LM96530? But there is still an echo-like wave at rising edge, witch maybe wrongly regarded as front reflecting wave. Is there a way to eliminate it?

Figure 4.

Figure 5.

Q6: It’s sure that LM96511 is compatible with LM96530. But, if I replace LM96511 with AFE5805, is it still compatible with the output Vpp of LM96530. What’s the maximum analog input signal for AFE5805? In datasheet, it declares input voltage of LNA to be 250mVpp and internal diodes to be 600mVpp.

Thanks for your help !

SHIWEI

AFE5805 LVDS TEST PATTERNS and LVDS receive

haiteng wu — Thu, 16 May 2013 02:27:50 GMT

I set EN_RAMP to "1", cause all the channels to output a repeating full-scale ramp pattern, and use altlvds_rx in FPGA to receive the ramp signal, I can see the ramp pattern in Signal Tap,but the data is not all right, regularly three datas are the same after three datas increments as the figures below show.

When I put sine signal to AFE5805 input pin, the same phenomenon happens.What causes this phenomenon,AD converter or LVDS receive ?

AFE5808A TEST MODE 5K-resistors accuracy ?%

cafain — Thu, 16 May 2013 08:09:06 GMT

Please tell me the accuracy of the resistance of 5kΩ contained in the path of the TEST MODE AFE5808A.
(AFE5808A DataSheet p.60-61)

(Resistance accuracy of 5kΩ contained in the path of the TEST MODE AFE5808A What is the "%".)

AFE5809EVM ON BOARD CLOCK @ 8MHz in CW mode?

Enrico Urru — Fri, 17 May 2013 08:55:33 GMT

Hello, I need your help!

I want to know if it is possible to use the local oscillator internal on the AFE5809EVM card , to drive Ultrasound probes ( 8 Mhz), or if I need to use an external oscillator at 8 MHz., in CW Mode.

Then, in the User's Guide, (SLOU338A–October 2012–Revised November 2012), at page 23, paragraph 9.3, it is not clear how to set the capacitors configuration to use External Clock for CW Mode.

First, 8 capacitors are indicated (The manufacture default setup uses ON BOARD CLOCK, with which C154, C155, C156, and C157 are installed. To switch to an external clock, these four capacitors must be uninstalled and capacitors C49,C50,C52, and C53 must be installed) ,

then in the table 1 below, there are others 8 different capacitors (C27 ,C28, C100 , C102, C29, C30, C25 , C26) .

there's an error? what are the right capacitors?

Thanks a lot for your support!
regards,
Enrico

LM96551

Grzegorz G��sowski — Mon, 12 Nov 2012 09:47:08 GMT

I have to design an ultrasound transmit pulser for my BSc Thesis. I've choosen LM96551 pulser, but I have a problem with connecting two supply voltages: VPF and VNF.

In datasheet we can see a block diagram, where these inputs are connecting form VPP(VNN) by capacitors, but, in my opinion, it will be better to use resistors (but I haven't enough knowledge to deal with this problem).

I admit that it would be very helpful to see electrical scheme of TX-SDK-V1.

I would be grateful for any help,

Grzegorz.

About TX-SDK-V1 powersupply?

Fu-Sheng Jiang — Tue, 07 May 2013 11:37:21 GMT

Hi,

I have a question about powersupply.

There +/- 50V , +/-10V , +/-5 , +/- 3.3 , sub and with ground on the TX-SDK-V1 kit.

Could you tell me what is using for by different Voltage ?? And is it turn on the same time??,But there is very hardly to find so many channel powersupply.

Because the ground is only one. So only can do one thing at the same time. I don't know what is the right Amp for the voltage?

The TX-SDK-V1 powersupply's banana connecter link on powersupply's +50 V / ground / -50 V. And using for driving HV pulsar.

The +/- 3.3 V with ground is using for FPGA.

And then...?

Could you give me the answer which about powersupply??

Thanks so much~

DRV201YMBR

jayaram boopalan — Sat, 11 May 2013 06:52:32 GMT

Hello,

we are using the voice coil motor (VCM),we intend to change the direction of the motor using driver, the part number of driver is "DRV201YMBR" , So please do inform is it possible to change the direction(To and fro) of VCM using the driver.

Regards

Jayaram

Mindflow Consultants

Software/Disc for TX-SDK-V2/NOPB?

Spiros Kotopoulis — Fri, 26 Apr 2013 14:30:13 GMT

I just received a TX-SDK-V2/NOPB and the GUI software disc was missing. Does anyone have an ISO or can it be downloaded anywhere online?

Any help/advice is greatly appreciated!

AFE0064 output current

Iolanda fuduli — Fri, 03 May 2013 06:21:27 GMT

Dears,

I'm using two AFE0064 coupled with an ADS8363. I have broken one of the two chips and I do not know if there is something wrong in my setup. I was trying to get the linearity of the output versus the integration time, this is the setup:

- setting of the AFE: range 7, INPUTz=0, sequential mode Half clock cycle clock input 2MHz

- 10Mohm resistors connected to the AFE's inputs, one side of the resistor connected to a voltage variable from 0v to 1.7v.

At the beginning I set the voltage on the resistor to 0v and integration time 14us so I was expecting 1.68v/10Mohm*14us=2.35nC instead the response of the chip was about the 45% FS, then I set 50us IT and the output was about 65% and with 100us was 75% while I was expecting a full scale. I did the same test using 1.2v instead of 0v and the chip shows a good linearity from 0% to FS. I kept playing around with voltage and integration time and now the chip it is actually broken.

I couldn't find any indication on the data-sheet about a maximum input current or anything else which could justify this behaviour. I send you in attachment a graph of the output versus IT with 0.4v applied on the resistors when the chip was still working, any help will be really appreciated as we got 10 more board in production.

best regards

Iolanda

Software/Disc for TX-SDK-V1?

Fu-Sheng Jiang — Tue, 07 May 2013 11:19:04 GMT

Hi,

I am davinciJ. There is no driver and software in TX-SDK-V1 EVM kit.

And the TI sales said pass a link to download,but not yet recieve.

Could you help me to deal with this problem?

My Email :davincij2010@gmail.com

Thanks so much~

functioning of LM 96570

chandu dusa — Sat, 02 Feb 2013 04:35:32 GMT

I am working with LM96570 for portable ultra sound system design.By reading the data sheet i got the idea about how to program the delay values and dalay patterns.But I am unable get the what delay values and what delay patterns to be programmed.Please give me idea about the calculation of delay values.

In datasheet default delay values and delay patterns are mentioned,Are they produce beem steering or else what is the purpose of those default values.

Thank you.

Questions about TX-SDK-V2 EVB

Valeri Repin — Mon, 08 Apr 2013 00:49:18 GMT

This EVB comes with "1 Set of 8 SAMTEC RF Connector-to-SMA bulkhead cables". Is it okay to use these cables to connect transducer to the board? The on-board SMA female connectors are they standard nothing special? Another question is about supply voltages 5V, 10V, 40V, 50V are they dual pos/neg voltages? Please provide the information about current consumption on all voltages. What is proper power-on (and power-off?) sequence?

Thanks in advance,

Valeriy

Minimum number power supply to LM96551

Samir Kumar Biswas — Sat, 13 Apr 2013 09:42:16 GMT

Dear all ,

Please help me on IC LM96551. I am using LM96551 for pulsing ultrasound transducer. I need four power supply such as VDD/VDN= +/- 10V , VPP/VNN = +/-50V, VSUB= -55V and VLL=+5V and there are another two floating power supply VPF = VPP-10V and VNF=VNN+10V. any one has any idea and/or has come across the optimum number power supply for this IC LM96551. sharing previous working knowledge will be more helpful. Or any suggestion is most welcome.

Waiting for your kind reply and help

FPGA TTL signal amplification with LM96551 and Pulsing ultrasound transducer

Samir Kumar Biswas — Mon, 15 Apr 2013 07:43:24 GMT

Dear all ,

Planning to use FPGA NI 5752 TTL signal and amplifying it with LM96551 for Pulsing ultrasound transducer. I am using LM96551 for circuiting and pulsing ultrasound transducer. I need four power supply such as VDD/VDN= +/- 10V , VPP/VNN = +/-50V, VSUB= -55V and VLL=+5V and there are another two floating power supply VPF = VPP-10V and VNF=VNN+10V. anyone has any idea and/or has come across the optimum number power supply for this IC LM96551. sharing previous working knowledge will be more helpful. Or any suggestion is most welcome.

Waiting for your kind reply and help

minimum voltage/power to VPF (8,53 pin) and VNF (10,51 pin ) pin of LM96551

Samir Kumar Biswas — Mon, 15 Apr 2013 08:59:53 GMT

Dear all ,

Planning to use FPGA NI 5752 TTL signal and amplifying it with LM96551 for pulsing ultrasound transducer. I need four power supply such as VDD/VDN= +/- 10V , VPP/VNN = +/-50V, VSUB= -55V and VLL=+5V and there are another two floating power supply VPF = VPP-10V and VNF=VNN+10V. Anyone has any knowledge of minimum voltage or power to VPF/VNF. sharing previous working knowledge will be more helpful. Or any suggestion is most welcome.

Waiting for your kind reply and help

VSP5620/VSP5621/VSP5622/ datasheet remarks

Lucas Kociszewski — Wed, 10 Apr 2013 13:29:40 GMT

Hello,

I found some mistakes in VSP562x datasheet (16 bit 4 channel, CCD/CMOS Sensor Analog Front End With LED Driver) , I have signed NDA for this product.

In document there is no explanation of CLK_CFG4 register (Clock configuration 4).

In addition there is no information about Clock configuration 3 register (neither in the register map nor register definition), but Clock configuration 2 and 5 registers exist.

Where I can get the latest version of this datasheet? I wrote to asktexas@ti.com but they redirected me here.

Thanks in advance

single channel ultrasound?

Calum Mackinnon — Mon, 08 Apr 2013 16:51:21 GMT

Hi,

I have a customer looking for single channel ultrasound - they are well aware of the AFE580x family of devices but don't need that many channels. Do you have a discrete design we could offer them? They are only interested in the ADC/DAC and then towards the front end analogue side - they have their processing needs covered.

Calum

Ho can I connect a 12-pin CMOS sensor output to the 27-pin ISP header TMS320DM642?

Belen Rubio — Sat, 06 Apr 2013 19:36:32 GMT

Hi, I'm trying to connect a 12-pin output cable form CIS scanner sensor to the header TMS320DM642. Is it possible?

I don't have access to the specifications of the CMOS sensor (scanner) since it is kind of a hack, would it make sense to think that this 12-pin flex cable follows a standard order? Which options do I have to make this connection happen? Any recommendations? Thanks.

VSP01M02

Ivan Ng — Wed, 03 Apr 2013 09:00:40 GMT

Is VSP01M02 still supported. there appears to be a broken link on ti.com and ESP does not return any valid product result as well.

Ivan

is there any AFE which have more operate range than SONY CXD5148?

Arvin Andy — Wed, 03 Apr 2013 02:39:14 GMT

Now ,I have a CCD(SONY ICX673) board,which work with cxd5148 and cxd4140, when the amplified times of the CXD5148 is set 6, the image around the lamp is a white area,and when the amplified times of the cxd5148 is set 1 times,the details image around the lamp can be seen, I think the sony CXD5148 is saturated ;

and i want to find a more operating range product to solve the problem,is TI have any one?

need help for LM96551 power supply

kuda wu — Fri, 29 Mar 2013 14:54:53 GMT

Dear sir,

I have to choose LM96551 as my ultrasound HV pulser, but power supply for LM96551 VNN, VPP and VSUB, I can't find any document or reference designs.

Who can help me to make recommendations? Thanks so much.

kuda

AFE5808/HSMC-ADC-bridge compatibility

Chris Grieves — Wed, 13 Mar 2013 12:52:55 GMT

Hi there

I'm looking at using the AFE5808 connected to Altera's DE3 via the HSMC-ADC-Bridge.

Firstly, I'm just checking that the 5808 and the hsmc-adc-bridge are compatible?.... From what I can see the 5808 has the QTH-060-01-L-D-A connector and the bridge board has the QSH-060-01-L-D-A connector, so they should be compatible.

Secondly, the Altera DE3 has HSTC connectors rather than HSMC connectors. As far as I understand the HSTC connectors are compatible with HSMC daughter cards as long as the I/O standards for HSMC connected pins are according to the High Speed Mezzanine Card (HSMC) specification. Can you confirm that this is the case for the HSMC-ADC-Bridge?

Thanks in advance

Chris

TPS650250

David Zlater — Mon, 25 Mar 2013 15:15:39 GMT

In the TPS650250 datasheet 3,3uH is "required for output voltages >2.8V" but this is a bit confusing since w.c. ripple current is at VOUT = VIN/2, see analysis below. It is also a bit confusing that SLVU731A has a 3,3uH inductor for the 1,1V supply without explanation. In the two example diagrams in the datasheet, one has 2,2uH for all 3 DCDCs, and one has 3,3uh for the 3,3V reg.

If ripple current is the issue then there is a double fault in the texts mentioned. It should read: "Larger inductance might be a good idea the closer VOUT is to VIN/2".

Analysis: I_RIPPLE = VOUT*(1-VOUT/VIN)/f/L; dI_RIPPLE/dVOUT = (1-2*VOUT/VIN)/f/L; Maximum I_RIPPLE is when dI_RIPPLE/dVOUT i e VOUT = VIN/2. In our case we have VIN = 5V so w.c. in for VOUT = 2,5V (and max allowed VIn is 6V so it won't get much higher in any application).

Analog input range of AFE5801 when AC coupling is used

Junwei Du — Sun, 17 Mar 2013 23:53:31 GMT

Hello,

I fount the analog input range of AFE5801 is –0.3V to MIN (3.6V, AVDD3 + 0.3V). If I have a negative signal, like -0.9V, (0.45 for positive input and -0.45 for negative input), is it mean I CAN NOT use AC coupling?

Thanks.

CDCLVD1204 to driver four AFE 5801

Junwei Du — Sun, 17 Mar 2013 23:49:01 GMT

Hi,

I want to use CDCLVD1204 as clock distribution to driver four AFE 5801, as CDCLVD1204 is quite simple compared to LMK00304. But compred to LMK00304, the Jitter is bigger.

Is it OK to use CDCLVD1204?

Thanks.

Imaging AFEs Forum - Recent Threads

Need Help for Ultrasonic Imaging Applications of LM96570/LM96550/LM96530/AFE5805

AFE5805 LVDS TEST PATTERNS and LVDS receive

AFE5808A TEST MODE 5K-resistors accuracy ?%

AFE5809EVM ON BOARD CLOCK @ 8MHz in CW mode?

LM96551

About TX-SDK-V1 powersupply?

DRV201YMBR

Software/Disc for TX-SDK-V2/NOPB?

AFE0064 output current

Software/Disc for TX-SDK-V1?

functioning of LM 96570

Questions about TX-SDK-V2 EVB

Minimum number power supply to LM96551

FPGA TTL signal amplification with LM96551 and Pulsing ultrasound transducer

minimum voltage/power to VPF (8,53 pin) and VNF (10,51 pin ) pin of LM96551

VSP5620/VSP5621/VSP5​622/ datasheet remar​ks​

single channel ultrasound?

Ho can I connect a 12-pin CMOS sensor output to the 27-pin ISP header TMS320DM642?

VSP01M02

is there any AFE which have more operate range than SONY CXD5148?

need help for LM96551 power supply

AFE5808/HSMC-ADC-bridge compatibility

TPS650250

Analog input range of AFE5801 when AC coupling is used

CDCLVD1204 to driver four AFE 5801

VSP5620/VSP5621/VSP5622/ datasheet remarks