Microchip MD1730 Manual de Usario

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2016 Microchip Technology Inc. DS20005586B-page 1
MD1730
Features
8-Channel Ultrasound Continuous Waveform
(CW) Transmitter with Integrated Beamformer
CW Output ±1V to ±6Vp-p with Low RON
-160 dbc/Hz Ultra-Low Phase Noise at 1 kHz
Offset and 5 MHz
8-Bit Programmable Per-Channel Beamforming
Phase Delay
8-Bit Programmable Dividers for CW Frequency
with Input Clock Frequency up to 250 Mhz
Input Clock Compatible with LVDS/SSTL or
Single-Ended LVCMOS
LVCMOS 2.5V Logic for the Control I/O pins
Fast SPI Interface Supports up to 200 MHz
SPI Interface Supports Daisy Chaining and
Broadcasting Mode
Applications
Medical Ultrasound Imaging System for
Cardiovascular Application
Ultrasound Fetal Heart Monitoring Device
Ultrasound Flow Meter
Programmable Array Pattern Generator
General Description
The MD1730 is an 8-channel ultra-low phase noise CW
transmitter with integrated beamformer. It is designed
for medical ultrasound imaging systems requiring
high-performance CW Doppler mode. The MD1730
has a dedicated signal path designed to minimize
phase noise to the output. In addition, it has a
high-speed SPI interface that enables CW
beamforming features. The outputs of the MD1730 can
swing up to ±6V and each output has a separate
programmable phase delay. Additionally, by
programming the internal frequency divider register,
the MD1730 can output different CW frequencies from
a single clock source. For instance, when the input
clock frequency is 160 MHz and the frequency divider
is set to 16, an output CW frequency of 5 MHz can be
obtained with a phase delay step size of 6.25 ns, which
translates to an angular resolution of 11.25 degrees.
Package Type
2
CLKN
VLL
EN
CBE1
SDO
CKB1
SPIB
CBE0
CKB0
GND
CLKP
EP
1
3
4
6
7
8
9
37
5
10
GND
TXRW
VGP
MD1730
6x6x0.9 mm 36-lead VQFN*
* Includes Exposed Thermal Pad (EP); see Table 3-1.
VDD
SCK
CSN
SDI
11 1512 13 14 181716
26
27
25
24
22
21
20
19
23
36 35 3134 33 28293032
VGN
CNF
VCW-
CPF
V
CW+
CW2
CW3
CW0
CW1
VGN
CW4
CW5
CW6
CW7
CNF
VCW-
CPF
VCW+
8-Channel Ultra-Low Phase Noise
Continuous Waveform Transmitter with Beamformer
MD1730
DS20005586B-page 2 2016 Microchip Technology Inc.
Block Diagram
0 to +
VC W+
C W0
VP F
VNF
+10V
VG P
E N
+2.5V
VL L
TXR W
S P IB
S DI
C S N
S C K
C L K N
C L K P
LVDS / S S T L
C loc k Input
S P I
&
R egis ters
G ND
C W1
MD1730
Thermal
P ad
-10V
S UB
V L L
C L K
C K B 0
C W7
VP F
VNF
0 to -
VC W-
VCW +
VCW -
HIZ[7: 0]
C P F
VP F
VNF
C NF
S DO
Q
MS B
D
0
C K B 1
C B E 1
V L L
C B E 0
+5V
VDD
VG N
C L K
P HD 7~0[7: 0] C WF D[7: 0]
P HD1[7: 0] C WF D[7: 0]
E NAE NA
Q
C L K C L K
Q
P HD7[7: 0] C WF D[7: 0]
E NA
E NA
Q
C L K C L K
Q
8
64
C L K
S C K
VCW +
VCW -
1uF
1uF 2.2uF
2.2uF
1uF
1uF
1uF
1uF
P HD0[7: 0] C WF D[7: 0]
E NA
E NA
Q
C L K C L K
Q
C W2
C W3
C W4
C W5
C W6
6V
6V
2016 Microchip Technology Inc. DS20005586B-page 3
MD1730
MD1730 CW Output via HV2201 Application Block Diagram
+10V
V
GP
+2 to +6V
VCW+
CW0
VPF
VNF
EN
+2.5V
V
LL
TXRW
SPIB
SDI
CSN
SCK
CLKN
CLKP
LVDS / SSLT
Clock Input
SPI
&
Registers
GND
CW1
MD1730
Thermal
Pad
-10V
SUB
VLL
CLK
CKB0
CW7
VPF
VNF
-2 to -6V
VCW-
VCW+
VCW-
HIZ[7:0]
CPF
VPF
VNF
CNF
SDO
Q
MSB
D
0
CKB1
CBE1
VLL
CBE0
+5V
V
DD
V
GN
CLK
PHD7~0[7:0] CWFD[7:0]
PHD1[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
PHD7[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
PHD0[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
8
64
CLK
SCK
VCW+
VCW-
XDCR
XDCR
D
LE
CL
SW0
D
LE
CL
SW1
D
LE
CL
SW2
D
LE
SW6
D
LE
CL
SW7
CLK
8-BIT
SHIFT
REGISTER
DIN
DOUT
LEVEL
SHIFTERS
OUTPUT
SWITCHES
VNN VPP CLR LE GND VDD
LATCHES
CL
TX7
EN
SEL
POS
NEG
B/CW
LVL[3:2]
POS[3:2]
NEG[3:2]
VDD2
High Speed
Gate Buers
VDD2
VDD1
VDD1
VSS
VDD1
High Speed
Gate Buers
Control
Logic and
Level
Transla-
tion
GND
MD1715
1 of 2-ch
TC8020
6 of 12-FET
+10V
VDD2
+10V
VDD1
+10V
AVD D
+90V
SP1
+50V
SP2
-90V
SN1
-50V
DP1
DN1
DP2
DN2
SN2
SP3
SN3
DP3
DN3
GP1
GN1
GP2
GN2
GP3
GN3
OP1
ON1
OP2
ON2
OP3
ON3
-10V
VSS
-10V
AVSSPADGND PAD VSUB
TX0
VDD2
High Speed
Gate Buers
VDD2
VDD1
VDD1
VSS
VDD1
High Speed
Gate Buers
Control
Logic and
Level
Transla-
tion
MD1715
1 of 2-ch
TC8020
6 of 12-FET
+10V
VDD2
+10V
VDD1
+10V
AVD D
+90V
SP1
+50V
SP2
-90V
SN1
-50V
DP1
DN1
DP2
DN2
SN2
SP3
SN3
DP3
DN3
GP1
GN1
GP2
GN2
GP3
GN3
OP1
ON1
OP2
ON2
OP3
ON3
-10V
VSS
-10V
AVSSPADGND PAD VSUB
HV2201
8-ch HV Analog Switch
EN
SEL
POS
NEG
B/CW
LVL[1:0]
POS[1:0]
NEG[1:0]
GND
B/CW LE +3.3V-100V +100V
CW/ B
CW_START
FPGA
FPGA

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: MD1730

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