Instrustar MDSO-LA

Instrustar MDSO-LA

Status	planned
Channels	2
Samplerate	48MHz
Analog bandwidth	20MHz
Vertical resolution	8bit
Triggers	none (SW-only)
Input impedance	1MΩ‖25pF
Memory	none
Display	none
Connectivity	USB
Website	instrustar.com

The Instrustar MDSO-LA is a USB-based

• 2-channel oscilloscope with an analog bandwidth of 20MS/s and 48MS/s sampling rate,
• 8/16-channel logic analyzer with a max. sampling rate of 24MHz.

Hardware

• USB: Cypress CY7C68013A-100AXC (FX2LP) (datasheet)
• 256-byte I²C EEPROM: 2x Microchip 24LC02BI (datasheet)
• 16-Bit bus transceiver with 3-state outputs: TI SN74LVC16245A (datasheet)
• 8-channel analog mux/demux: 2x NXP 74HC4051D (datasheet)
• 1A low-dropout voltage regulator (3.3V): Advanced Monolithic Systems AMS1117-3.3 datasheet)
• 2W, fixed input, isolated & unregulated dual/single output DC/DC converter: Mornsun A_S-2WR2 (A0505S-2WR2) (datasheet)
• ADC 8-bit, 40MHz, dual ADC: Analog Devices AD9288 (datasheet)
• 1.4GHz current feedback amplifiers with enable: 2x Intersil EL5166 (datasheet)
• 145 MHz FastFET Opamps: 2x AD8065: (datasheet), markings "HRA"
• Crystal: 24MHz

The device has a switch. Depending on the position it comes up with different USB VID/PIDs:

• MDSO-LA: [TODO] (used for oscilloscope mode)
• Saleae Logic: 0925:3881 Lakeview Research Saleae Logic (Saleae Logic VID/PID, so fx2lafw works out of the box)

Cypress FX2 pinout:

PD5	1-	O	-56	PD4
PD6	2-		-55	PD3
PD7	3-		-54	PD2
GND	4-		-53	PD1
CLKOUT	5-		-52	PD0
VCC	6-		-51	*WAKEUP
GND	7-		-50	VCC
RDY0/*SLRD	8-		-49	RESET#
RDY1/*SLWR	9-		-48	GND
AVCC	10-		-47	PA7 (Activate analog mode vs digital mode)
(24MHz crystal) XTALOUT	11-		-46	PA6 (74HC4051, S2)
(24MHz crystal) XTALIN	12-		-45	PA5 (74HC4051, S1)
AGND	13-		-44	PA4 (74HC4051, S0)
AVCC	14-		-43	PA3 (74HC4051, S0)
(USB D+) DPLUS	15-		-42	PA2 (774HC4051, S1)
(USB D-) DMINUS	16-		-41	PA1 (74HC4051, S2)
AGND	17-		-40	PA0
VCC	18-		-39	VCC
GND	19-		-38	CTL2
(CTL0, AD9288 ENCA/B) *IFCLK	20-		-37	CTL1
RESERVED	21-		-36	CTL0 (IFCLK, AD9288 ENCA/B)
(EEPROM SCL) SCL	22-		-35	GND
(EEPROM SDA) SDA	23-		-34	VCC
VCC	24-		-33	GND
PB0	25-		-32	PB7
PB1	26-		-31	PB6
PB2	27-		-30	PB5
PB3	28-		-29	PB4

NXP 74HC4051D (upper/lower, CH1/CH2) pinout:

Y4 1-   O -16 VCC Y6 2- -15 Y2 Z 3- -14 Y1 Y7 4- -13 Y0 Y5 5- -12 Y3 (GND) E# 6- -11 S0 (PA3) VEE 7- -10 S1 (PA2) GND 8- -9 S2 (PA1)

Y4 1-   O -16 VCC Y6 2- -15 Y2 Z 3- -14 Y1 Y7 4- -13 Y0 Y5 5- -12 Y3 (GND) E# 6- -11 S0 (PA4) VEE 7- -10 S1 (PA5) GND 8- -9 S2 (PA6)

Microchip 24LC02B (top / bottom) pinout: There are 2 for the 2 possible hardware configurations (as MSDO-LA or as USBee)

(VCC) A0 1-   O -8 VCC (GND) A1 2- -7 WP (GND) (GND) A2 3- -6 SCL (FX2 SCL) VSS 4- -5 SDA (FX2 SDA or NC)

Analog Devices AD9288 pinout:

AD9288 pins	Description
S1, S2	S1=VCC, S2=GND. "Normal operation, data align disabled".
DFS	Tied to GND. Data format select = "offset binary" (not "twos complement").
AINA, AINB	Analog input channels.
D0A-D7A	Connected to FX2 PB0-PB7.
D0B-D7B	Connected to FX2 PD0-PD7.

Photos

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