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Resolver / Digital converters (Smartcoder)

Smartcoder is a R/D (Resolver to Digital) conversion IC, which converts resolver signals into digital absolute position angle signals.
It is usable in a wide range of applications, including vehicle/robot/machine tool related applications, in combination with brushless resolvers such as our Smartsyn and Singlsyn.

Smartcoder AU6805シリーズ

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User's Manual



・Adopts R/D conversion based on a proven digital tracking system
・Low cost, small size and light weight
・Satisfying fail check functions
(1) Abnormality detection
Capable of detecting abnormal resolver signals, breaking of resolver signals, abnormal R/D conversion and abnormally high temperature of a IC
(2) Built in self test
Conducts a self test on R/D conversion and abnormality detection
・Realization of system/cost reduction based on all-in-one concepts
(1) Integrated with an excttation amplifier (Output current: 1 OmA rms/20mA rms)
(2) Integrated with an operation clock
・Enhancement of functions corresponding to various applications
(1) Requires no phase adjustment to excitation signals (Allowable range: Within土45゜)
(2) Variable setting of controlling bandwidth (fBW) (Selectable from 7 types of fixed values or automatic adjustment)
(3) Capable of digital conversion of linear hall IC signals and R/D parallel connections to resolvers
(4) Output redundancy (Triple redundancy-Parallel/Pulse/Serial output)


Model AU6805
Resolution 4,096(=212
Tracking rate 240,000min-1( When fBW is fixed.)
Convers1on accuracy ±4 LSB
Max. angular acceleration 3,000,000 rad/sec2(When fBW is automatic adjustment.)
Settling time 1.5ms(When input step is 180゜,and fBW is automatic adjustment.)
Output response ±0.2°/10,000min-1
Output form 12bit binary code Positive logic parallel+ A,B,Z + Serial 1/F
Power requirement +5V±10% (45mA: When the excitation amplifier is set at 10mA rms.)
Excitation power supply Integrated with a constant current control method excitation amplifier (10mArms / 20mArms)
Outline 48pin LQFP(7×7)、Pin to pin: 0.5mm
Operating temperature -40~+125℃

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