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R/D Converters (VRDC)

High-performance R/D Converter compatible with all resolver signal methods.
By adopting a new R/D conversion method, high-speed and high-precision angle detection have been realized.

※This product uses the results of a project subsidized by the New Energy and Industrial Technology Development Organization (NEDO).

Features

High-performance R/D output (Main-RDC)
・R/D conversion of all resolver signal methods is possible.
・Simultaneous output of angle data and speed data
・High-speed, high-resolution, high-precision real-time data (acceleration modeless)
R/D conversion function Triple redundancy ^※1
・Main-RDC (Real-Time PLL system): 1 system
・Sub-RDC (PLL system): 2 systems
Health monitoring function ^※1
・RDC output data comparison
・Various anomaly detection
Various built-in functions ^※1
・Serial communication SILK®^※2 for servo sensors that can connect multiple sensors to bus communication
・R/D conversion bandwidth setting

　※1：Functions may be limited in combination with resolvers other than VRS and BRS resolvers.
　※2：SILK® is a trademark of Tamagawa Seiki Co., Ltd.

Specifications

Resolver	VRS (Two-phase excitation / two-phase output)	VRT (Two-phase excitation / one-phase output)	VRX (One-phase excitation / two-phase output)
Resolution	65,536 (= 2¹⁶）
Tracking rate	240,000 min^-1
Conversion accuracy	±16 LSB	±32 LSB	±64 LSB
Max. Angular acceleration	100,000 to 13,000,000 rad/s² (Depends on bandwidth setting)	60,000 to 8,800,000 rad/s² (Depends on bandwidth setting)
Settling time	1.5 to 12.5 ms (Depends on bandwidth setting)	2.0 to 15.0 ms (Depends on bandwidth setting)
Output response	±0.15 °/10,000 min^-1(Equivalent to input/output delay of 2.5 us)
Output form	Parallel + A,B,Z + Serial (SPI or NRZ)
Power requirement	+3.3 V±10 %（46 mA）
Outline	48 pin TQFP (7 mm×7 mm) Pin to pin: 0.5 mm
Operating temperature	-40 to +125℃

Outline

Dimension ：mm

Functional Block Diagram

Pin Description

No.	Symbol	Class	Remarks	No.	Symbol	Class	Remarks	No.	Symbol	Class	Remarks
1	COSMNT	A/O	COS monitor	17	D0	DO(BUS)	D0	33	A1	D/O(I)	Phase Encoder pulse A1
2	S3	A/I	S3 input	18	D1	DO(BUS)	D1	34	B1	D/O(I)	Phase Encoder pulse B1
3	S1	A/I	S1 input	19	D2	DO(BUS)	D2	35	ERRHLD	D/O	Anomaly detection (hold)
4	COSMNTB	A/O	COS monito（reversal）	20	D3	DO(BUS)	D3	36	DGND	―	Digital GND
5	SINMNTB	A/O	SIN monito（reversal）	21	D4	DO(BUS)	D4	37	XTAL	―	Resonator connection
6	S2	A/I	S2 input	22	D5	DO(BUS)	D5	38	CLKIN	D/I	Ext. clock input
7	S4	A/I	S4 input	23	D6	DO(BUS)	D6	39	VREGC	―	Internal power supply
8	SINMNT	A/O	SIN monitor	24	D7	DO(BUS)	D7	40	VCC	―	Analog power supply
9	AGND	―	Analog GND	25	VDD	―	Digital power supply	41	RI4	A/I	R4 input
10	TEST2	D/I	Test terminal	26	RD（INHB）	D/I	Read (Inhibit)	42	RI2	A/I	R2 input
11	TEST1	D/I	Test terminal	27	CSB	D/I	Chip select	43	R4	A/O	R4 output
12	ERRSTB	D/I	Error reset	28	TX/SO	D/O	Serial communication 1	44	R2	A/O	R2 output
13	DBSEL0	D/I	BUS output select 0	29	RX/SI	D/I	Serial communication 1	45	R1	A/O	R1 output
14	DBSEL1	D/I	BUS output select 1	30	TXEN/SCSB	DO/DI	Serial communication 1	46	R3	A/O	R3 output
15	DBSEL2	D/I	BUS output select 2	31	SCK	D/I	Serial communication 1	47	RI1	A/I	R1 input
16	DBSEL3	D/I	BUS output select 3	32	Z1	D/O(I)	Phase Encoder pulse Z1	48	RI3	A/I	R3 input

Note:
１．“No.” corresponds to the pin number of terminal.
２．“Class” means the following :
　*A/I : Analog input
　*A/O : Analog output
　*A/O (I) : Analog output (I/O is switched by control terminal input.)
　*D/I : Digital input
　*D/O : Digital output
　*D/O (I) : Digital output (Input is added internally.)
　*D/O (BUS) : Digital output (3-state output)
３． No.10 TEST2 signal and No. 11 TEST1 signal are signals that do not directly participate in operations, and normally, TEST1 is bypassed with the digital power supply (VDD) and TEST2 with digital GND (DGND).
When they are not connected to anything, they are internally pulled up or pulled down respectively.