3470BB_ND14001E00

SM3470BB
Interpolation Encoder IC
OVERVIEW
The SM3470B is an interpolation IC for encoders. It accepts displacement detection, 2-phase analog signals (A and B phases) and a zero
point detection analog signal (Z phase) from an encoder, interpolates the signals by a specified interpolation factor, and outputs
corresponding 2-phase digital signals (A and B phases) and a zero point detection digital signal (Z phase). It incorporates a built-in
EEPROM for interpolation switching and input signal adjustment functions, providing support for system miniaturization and high-speed
input/output signal operation.
FEATURES
▪ Interpolation switching function: ×1, 2, 4, 8, 16, 32, 5, 10, 20 (selectable)
▪ Adjustment function: Offset adjustment
▪ Supply voltage: 2.7 to 5.5V
▪ Operating temperature range: –40 to +125°C
▪ Input frequency: 500kHz (max)
▪ Output frequency: 2.5MHz (max)
▪ Package: QFN24 (size: 4mm × 4mm)
ORDERING INFORMATION
Device
Package
*1
SM3470BB-G
24 pin QFN
*1. “-G” option code lead-free package
0.2 S B
PACKAGE DIMENSIONS
4.00±0.1
0.2 S A
0.75
0.75
A
C0.11
0.50
2.40 ±0.1
0.45±0.1
0.65 MAX
0.05 MAX
0 MIN
// 0.2 S
0.22±0.05
0.15
2.40 ±0.1
3
.0
C0
4.00±0.1
B
0.50
0.22±0.05
0.05
M
S AB
S
0.08 S
[unit:mm]
SEIKO NPC CORPORATION - 1
SM3470BB
PINOUT
B
BN
A
AN
Z
ZN
IO1
NC
NC
IO2
IO3
VPP
QFN24 package
(Top view)
PIN DESCRIPTION
Pin No.
Name
I/O
1
VSS
-
Function
Ground
2
NC
-
No connection
3
VDD
-
Power supply
4
DA
O
Displacement detector signal output (A)
5
DB
O
Displacement detector signal output (B)
6
DZ
O
Zero point detector signal output (Z)
7
IO1
O
General-purpose output 1
8
NC
-
No connection
9
NC
-
No connection
10
IO2
O
General-purpose output 2
11
IO3
O
General-purpose output 3
12
VPP
-
EEPROM access high-voltage pulse
13
DATA
I/O
14
CLK
I
Serial interface clock input with pull-down resistor
15
CE
I
Serial interface enable input with pull-down resistor
16
NC
-
No connection
17
NC
-
No connection
18
NC
-
No connection
19
ZN
I
Zero point detector inverse-phase signal input
20
Z
I
Zero point detector signal input
21
AN
I
Displacement detector signal (–cos) input
22
A
I
Displacement detector signal (cos) input
23
BN
I
Displacement detector signal (–sin) input
24
B
I
Displacement detector signal (sin) input
25
TP
-
Thermal pad. Connect to VSS or leave OPEN.
*. I: Input pin
O: Output pin
Serial interface data input/output with pull-down resistor
I/O: Input/Output pin
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SM3470BB
BLOCK DIAGRAM
SPECIFICATIONS
Absolute Maximum Ratings
VSS=0V
Parameter
Symbol
Condition
*1
Supply voltage 1
VDD
Supply voltage 2*1
VPP
*1,*3
Input voltage
VIN
*1,*3
Output voltage
VOUT
*2
Junction temperature
Tj
Power dissipation*1
PD
Storage temperature*4
Rating
Unit
VDD pin
–0.3 to +6.5
V
VPP pin
VDD to +20.0
V
–0.3 to VDD+0.3
V
–0.3 to VDD+0.3
V
*5
Input pins
*6
Output pins
+150
°C
1570
mW
Tstg1
–40 to +125
°C
EEPROM data retention temperature
Tstg2
+125
°C
EEPROM rewrite cycles
NW
10
cycles
Ta=25°C*7
*1. Parameters must not exceed ratings, not even momentarily. If a rating is exceeded, there is a risk of IC failure,
deterioration in characteristics, and decrease in reliability.
*2. Parameters should not exceed ratings. If a rating is exceeded, there is a risk of deterioration in characteristics and decrease in reliability.
*3. VDD value is the recommended operating voltage rating.
*4. Stored separately without packing material in Nitrogen or vacuum atmosphere.
*5. CE, CLK, DATA, A, AN, B, BN, Z, and ZN terminals.
*6. DATA, DA, DB, DZ, IO1, IO2, and IO3 terminals.
*7. 114.3×76.2×1.6mm, 150% wiring ratio, FR-4 4-layer board (with thermal pad connections).
Dissipation will vary due to differences in board specifications and footprint pattern.
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SM3470BB
Power Dissipation
2000
Power dissipation Pd [mW]
1800
1600
1400
1200
1000
800
600
400
200
0
0
25
50
75
100
125
Operating temperature Ta [°C]
Recommended Operating Conditions
The recommended operating conditions are the conditions for which the electrical characteristics are guaranteed.
VSS=0V
Parameter
Symbol
Supply voltage 1
VDD
Condition
MIN
VDD pin
*1
VPP pin, when writing to EEPROM
TYP
MAX
Unit
2.7
5.5
V
19
19.5
V
Supply voltage 2
VPP
Input voltage
VIN
VSS
VDD
V
Operating temperature range
Ta
–40
+125
°C
*1. Use with the VPP terminal open-circuit when not accessing EEPROM.
Note. Operation outside the recommended operating conditions may adversely affect reliability. Use only within specified ratings.
Electrical Characteristics
DC Electrical Characteristics
Recommended operating conditions using reference circuit, unless otherwise noted
Parameter
Current consumption
Logic input voltage
Logic input current
Logic output voltage
Symbol
IDD
VIH
VIL
IIH
IIL
Condition
MIN
*1
VDD, No load
CE, CLK, DATA
CE, CLK, DATA
VOH
DATA, Iout = +1mA
VOL
DATA, Iout = –1mA
TYP
25
MAX
Unit
36
mA
0.7VDD
VDD
VSS
0.3VDD
20
200
–1
VDD–0.4
0.3
V
μA
V
*1. Typical conditions: VDD=5V, Ta=25°C, 16x interpolation, no output load
SEIKO NPC CORPORATION - 4
SM3470BB
Analog Circuit Electrical Characteristics
VDD=2.7 to 5.5V, VSS=0V, Ta=–40 to +125°C unless otherwise noted
Parameter
Input voltage range*1
Output voltage*2
Symbol
Conditions
VinHL
Min
1
VoutH
Iout = +1.5mA, digital output
VoutL
Iout = –1.5mA, digital output
Typ
Max
Unit
VDD–1
V
VDD–0.4
V
0.3
V
Input frequency
fin
500
kHz
Output frequency
fout
2.5
MHz
3
Degrees
10
ns
Angular error*3
(max – min)
ARAL
VDD=5.0V, 16x interpolation,
10kHz input frequency,
single-ended input,
3.0Vpp input amplitude
Rise/Fall time
trf
0.1VDD to 0.9VDD, CL=20pF
*1. A, AN, B, BN, Z, and ZN terminals.
*2. DA, DB, DZ, IO1, IO2, and IO3 terminals.
*3. The angular error expresses the variation from the ideal phase difference of interpolation outputs DA and DB as a phase difference of the input period.
Converting 3° and expressing as a percentage of the output period gives 13.3% using equation (1) below.
3 deg× 16 x
= 13.3%
360 deg
(1)
(where 16x is the interpolation factor)
SEIKO NPC CORPORATION - 5
SM3470BB
Serial Interface AC Characteristics
VDD=2.7 to 5.5V, VSS=0V, Ta=–40 to +125°C unless otherwise noted
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
CLK cycle
tCLK
1000
ns
CLK HIGH pulse width
tWH
400
ns
CLK LOW pulse width
tWL
400
ns
CLK rise/fall time
tRF
CE setup time
tCS
200
ns
CE hold time
tCH
200
ns
Write data setup time
tDS
Write mode, DATA pin
100
ns
Write data hold time
tDH
Write mode, DATA pin
100
ns
Data propagation delay
tRD
Read mode, CL=20pF
200
ns
Output disable time
tRZ
CL=20pF, DATA pin
200
ns
Interface waiting time
tSI
500
ns
EEPROM write time
tMW
25
ms
100
ns
tSI
CE
tCLK
tCS
CLK
tRF
1
tDS
tRF
90%
90%
10%
10%
tWL
2
tWH
3
tDS
4
5
6
14
tMW
tMW
15
16
tCH
tDH
DATA
(WRITE)
tRD
tRZ
DATA
(READ)
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SM3470BB
FUNCTIONAL DESCRIPTION
Adjustment Circuit
The adjustment circuit block accepts displacement detection 2-phase analog signals from the encoder (A-phase and B-phase) and the
zero-point detection analog signal (Z-phase) and perform offset adjustment.
The offset adjustment is set according to register data. For details, see “Analog Adjustment Bit Assignment.”
In the offset adjustment sequence, first adjust the internal reference voltage (VDD/2) offsets (FA, FB, FZ) for the inverting output amplifier
(monitoring IO1, IO2, IO3), then adjust the offsets (FAN, FBN, FZN) for the non-inverting output amplifier (monitoring DA, DB, DZ).
If the A/B/Z-phase inputs are used as single-ended inputs, the AN, BN, and ZN inputs can be set to VDD/2 level according to the operating
mode.
A(cos)
AMP
AN(-cos)
ANsig(-cos)
×(-1)
Asig(cos)
AMP
Offset
adjustment
data
FA[7:0]
B(sin)
Offset
adjustment
data
FAN[4:0]
BNsig(-sin)
AMP
BN(-sin)
×(-1)
Offset
adjustment
data
FB[7:0]
Z
Bsig(sin)
AMP
Offset
adjustment
data
FBN[4:0]
ZNsig
AMP
ZN
×(-1)
Zsig
AMP
Offset
adjustment
data
FZ[5:0]
Offset
adjustment
data
FZN[2:0]
Offset adjustment example (VDD=5.0V)
2600
2400
2200
2800
2600
2400
2200
2000
2000
1800
1800
0
32
64
96
128 160 192 224 256
Offset voltage adjustment data FA,(FB)
Z phase non-inverting output
2550
2525
2540
2520
non-inverting output offset [mV]
3000
non-inverting output offset [mV]
3000
2800
A(B)phase non-inverting output
Z phase inverting output
3200
inverting output offset [mV]
inverting output offset [mV]
A(B)phase inverting o u t put
3200
2530
2520
2510
2500
2490
2480
2470
2460
8
16
24
32
40
48
56
Offset voltage adjustment data FZ
64
2510
2505
2500
2495
2490
2485
2480
2475
2450
0
2515
2470
0
4
8
12
16
20
24
28
32
Offset voltage adjustment data FAN,FBN
0
1
2
3
4
5
6
7
8
Offset voltage adjustment data FZN
SEIKO NPC CORPORATION - 7
SM3470BB
Interpolation Circuit
The interpolation circuit passes the input signals, with offset correction by the adjustment circuit, through a resistance network divider,
converts the signals to binary using comparators, and outputs 2-phase digital signals corresponding to the interpolation factor selected by
register data using logical operation processing.
The interpolation factor can be set to one of nine values: ×1, 2, 4, 8, 16, 32, 5, 10, or 20. The interpolation factor is set using 4-bit (TB[3:0])
data written to the register.
ANsig(-cos)
Buffer
DA
Buffer
DB
Buffer
DZ
Asig(cos)
BNsig(-sin)
Resisor
Ladder
Comparator
Logic
Bsig(sin)
Zsig
Comparator
interpolation
select data
TB[3:0]
Z pulse width
select data
ZTW
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SM3470BB
Timing Diagrams
Interpolation Function and Z-phase Input/Output Timing
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SM3470BB
SEIKO NPC CORPORATION - 10
SM3470BB
Power-ON Timing
VDD
Power On Reset release
NG
EEPROM
ALL-DATA READ
EEPROM
Function
DATA
Verify
OK
Output
(DA,DB,DZ)
Output disable
Hi-Z
Output enable
When power is applied, the settings written in EEPROM and the adjustment data are automatically transferred to the register. During this
interval, the outputs are disabled (Hi-Z). If there is a discrepancy between the data written to the resister and the EEPROM data after data
verification, the EEPROM settings are automatically transferred again and then the outputs are enabled if the data matches. The automatic
transfer time is 200µs or less. During this interval, the VPP terminal should be left open. If a voltage is applied to VPP, the automatic
transfer of settings is aborted.
Serial Interface
The IC has a built-in EEPROM for the register for the analog circuit adjustment and operating mode settings, and for data retention. The
EEPROM is accessed using a 3-wire serial interface.
The CE, CLK, and DATA signal inputs are used only when writing and reading data, and should not be modified at other times to prevent
incorrect operation.
The serial interface is disabled during the interval while the settings are automatically transferred from EEPROM to the register after power
is applied.
Data Format
CE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R/W
R/E
A2
A1
A0
D8
D7
D6
D5
D4
D3
D2
D1
D0
15
16
CLK
DATA
Address
Read/Write
L: Read
H: Write
Data
Access destination: Register/EEPROM
L: Register
H: EEPROM
* The read and write data are not guaranteed if there are too many or too few CLK pulses.
* Control the EEPROM data write time using the HIGH-level pulse time of the 15th and 16th pulses on CLK.
* The operating mode setting is ignored when writing to EEPROM. The mode is set when writing to the register.
SEIKO NPC CORPORATION - 11
SM3470BB
Input voltage
VPP Terminal
Apply the high-voltage write-pulse voltage (VPP) to the EEPROM program terminal VPP only after the voltage (VDD) rising edge on VDD.
Also, the falling edge of VPP should precede the falling edge of VDD.
VPP
VDD
Time
Address Structure
Mode
Address
Data
A2
A1
A0
D8
D7
0
0
0
ZI
ABI
0
0
1
-
-
Offset voltage adjustment (A-phase inverting
output amplifier)
0
1
0
-
FA[7:0]
Offset voltage adjustment (B-phase inverting
output amplifier)
0
1
1
-
FB[7:0]
Offset voltage adjustment (Z-phase
non-inverting/inverting output amplifier)
1
0
0
Offset voltage adjustment (A-phase
non-inverting output amplifier)
1
0
1
-
-
-
-
FAN[4:0]
Z-phase output pulse setting, Offset voltage
adjustment (B-phase non-inverting output
amplifier)
1
1
0
ZTW
0*2
-
-
FBN[4:0]
1
1
1
-
-
-
-
Input, interpolation factor, operating mode
settings
-*1
-*1
D6
D5
D4
D3
D2
TB[3:0]
-
-
D1
D0
MC[2:0]
-
FZN[2:0]
-
-
-
-
-
-
FZ[5:0]
-
-
-
*1. Address 001 and 111 are prohibited for use.
*2. This bit should be set to 0.
*3. All EEPROM data is set to 0 when shipped from the factory.
SEIKO NPC CORPORATION - 12
SM3470BB
Analog Adjustment Bit Assignment
■ Analog input setting
■ Interpolation factor setting TB[3:0]
Z
ABI
Analog input setting
0
0
A-phase, B-phase
Z-phase differential input
0
1
A-phase, B-phase single-ended input
Z-phase differential input
1
0
A-phase, B-phase differential input
Z-phase single-ended input
1
1
A-phase, B-phase
Z-phase single-ended input
* Single-ended inputs AN, BN, ZN = VDD/2 level.
TB3
TB2
TB1
TB0
Interpolation factor
0
0
0
0
1
-
0
0
1
2
-
0
1
0
4
-
0
1
1
8
-
1
0
0
16
-
1
0
1
32
-
1
1
0
5
-
1
1
1
20
1
0
0
0
10
■Operating mode setting (output terminal setting)
MC2
MC1
MC0
DA pin
DB pin
DZ pin
IO1 pin
IO2 pin
IO3 pin
Notes
0
0
0
A-phase
interpolation
output
B-phase
interpolation
output
Z-phase output
Hi-Z
Hi-Z
Hi-Z
Digital
single-ended
output
1
A-phase
interpolation
output
B-phase
interpolation
output
Z-phase output
0
A-phase
amplifier
non-inverting
output
B-phase
amplifier
non-inverting
output
Z-phase
amplifier
non-inverting
output
A-phase
amplifier
non-inverting
output
B-phase
amplifier
non-inverting
output
Z-phase
amplifier
non-inverting
output
0
0
0
1
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
A-phase
A-phase
Z-phase
interpolation
interpolation
inverting output
inverting output inverting output
(DZ inverse)
(DA inverse)
(DB inverse)
Hi-Z
Hi-Z
Hi-Z
A-phase
B-phase
Z-phase
amplifier
amplifier
amplifier
inverting output inverting output inverting output
Digital
differential
output
Analog
single-ended
output
Analog
differential
output
Not used
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SM3470BB
■ Offset voltage adjustment 1 (FA[7:0], FB[7:0])
F7
F6
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2995
2991
2988
2984
2980
2976
2972
2968
2964
2960
2956
2952
2949
2945
2941
2937
2933
2929
2925
2921
2917
2913
2910
2906
2902
2898
2894
2890
2886
2882
2878
2874
2871
2867
2863
2859
2855
2851
2847
2843
2839
2835
2832
2828
2824
2820
2816
2812
2808
2804
2800
2796
2793
2789
2785
2781
2777
2773
2769
2765
2761
2757
2754
2750
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
[mV]
F7
F6
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2746
2742
2738
2734
2730
2726
2722
2718
2715
2711
2707
2703
2699
2695
2691
2687
2683
2679
2676
2672
2668
2664
2660
2656
2652
2648
2644
2640
2637
2633
2629
2625
2621
2617
2613
2609
2605
2601
2598
2594
2590
2586
2582
2578
2574
2570
2566
2562
2559
2555
2551
2547
2543
2539
2535
2531
2527
2523
2520
2516
2512
2508
2504
2500
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
-
[mV]
Offset voltage example at VDD=5.0V.
SEIKO NPC CORPORATION - 14
SM3470BB
■ Offset voltage adjustment 2 (FA[7:0], FB[7:0])
F7
F6
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2496
2492
2488
2484
2481
2477
2473
2469
2465
2461
2457
2453
2449
2445
2442
2438
2434
2430
2426
2422
2418
2414
2410
2406
2403
2399
2395
2391
2387
2383
2379
2375
2371
2367
2364
2360
2356
2352
2348
2344
2340
2336
2332
2328
2325
2321
2317
2313
2309
2305
2301
2297
2293
2289
2286
2282
2278
2274
2270
2266
2262
2258
2254
2250
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
[mV]
F7
F6
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2247
2243
2239
2235
2231
2227
2223
2219
2215
2211
2208
2204
2200
2196
2192
2188
2184
2180
2176
2172
2169
2165
2161
2157
2153
2149
2145
2141
2137
2133
2130
2126
2122
2118
2114
2110
2106
2102
2098
2094
2091
2087
2083
2079
2075
2071
2067
2063
2059
2055
2052
2048
2044
2040
2036
2032
2028
2024
2020
2016
2013
2009
2005
2001
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
[mV]
* Offset voltage example at VDD=5.0V.
SEIKO NPC CORPORATION - 15
SM3470BB
■ Offset voltage adjustment (FZ[5:0])
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
[mV]
F5
F4
F3
F2
F1
F0
Offset
[mV]
Tolerance
[mV]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2996
2980
2964
2948
2932
2916
2900
2884
2868
2852
2836
2820
2804
2788
2772
2756
2740
2724
2708
2692
2676
2660
2644
2628
2612
2596
2580
2564
2548
2532
2516
2500
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2484
2468
2452
2436
2420
2404
2388
2372
2356
2340
2324
2308
2292
2276
2260
2244
2228
2212
2196
2180
2164
2148
2132
2116
2100
2084
2068
2052
2036
2020
2004
1988
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
* Offset voltage example at VDD=5.0V.
■ A/B-phase non-inverting output amplifier offset
Voltage adjustment (FAN[4:0], FBN[4:0])
FN4
FN3
FN2
FN1
FN0
Offset
[mV]
Tolerance
[mV]
FN4
FN3
FN2
FN1
FN0
Offset
[mV]
Tolerance
[mV]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2541
2538
2535
2532
2530
2527
2524
2522
2519
2516
2514
2511
2508
2505
2503
2500
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2497
2495
2492
2489
2487
2484
2481
2478
2476
2473
2470
2468
2465
2462
2460
2457
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
2.7
* Offset voltage example at VDD=5.0V.
SEIKO NPC CORPORATION - 16
SM3470BB
■ Z-phase non-inverting output amplifier offset
Voltage adjustment (FZN[2:0])
■ Z-phase output pulsewidth setting
See “Z-phase Output Timing” on Page 9-10
FN2
FN1
FN0
Offset
[mV]
Tolerance
[mV]
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
2518
2512
2506
2500
2494
2488
2482
2476
6.0
6.0
6.0
6.0
6.0
6.0
6.0
ZTW
Pulse width (T=output period)
0
T/4 (DA=LOW, DB=LOW)
1
T (clockwise direction,
sync on DA falling edge)
Offset voltage example at VDD=5.0V.
TYPICAL APPLICATION CIRCUITS
Typical Application Circuit 1
Operating condition: A/B-phase differential input (ABI=0)
(Register setting)
Z-phase single-ended input (ZI=1)
Digital single-ended output (MC[2:0]=000)
0.01uF
1uF
VDD
5V
DA
IO1
A(cos)
A
AN(-cos)
DB
IO2
AN
SM3470B
B(sin)
B
BN(-sin)
DZ
IO3
BN
Z
Z
CE
CLK
DATA
ZN
0.01uF
VSS
Writer
board
VPP
Typical Application Circuit 2
Operating condition: A/B-phase differential input (ABI=0)
(Register setting):
Z-phase not used, single-ended input setting (ZI=1)
Digital single-ended output (MC[2:0]=000)
0.01uF
1uF
VDD
5V
DA
IO1
A(cos)
AN(-cos)
B(sin)
BN(-sin)
A
DB
IO2
AN
SM3470B
B
DZ
IO3
BN
Z
CE
CLK
DATA
ZN
VSS
Writer
board
VPP
SEIKO NPC CORPORATION - 17
SM3470BB
Typical Application Circuit 3
Operating condition: A/B-phase single-ended input (ABI=1)
*1: AN and BN are set to VDD/2 internally.
(Register setting):
Z-phase not used, single-ended input setting (ZI=1)
Digital single-ended output (MC[2:0]=000)
0.01uF
1uF
5V
VDD
DA
IO1
A(cos)
A
※1 VDD/2
DB
IO2
AN
SM3470B
B(sin)
B
※1 VDD/2
DZ
IO3
BN
Z
CE
CLK
DATA
ZN
VSS
Writer
board
VPP
Typical Application Circuit 4
Operating condition: A/B-phase differential input (ABI=0)
(Register setting):
Z-phase not used, single-ended input setting (ZI=1)
Digital single-ended output (MC[2:0]=000)
0.01uF
1uF
5V
VDD
DA
IO1
A(cos)
A
DB
IO2
AN
B(sin)
SM3470B
B
DZ
IO3
BN
Z
Vref
CE
CLK
DATA
ZN
VSS
Writer
board
VPP
SEIKO NPC CORPORATION - 18
SM3470BB
Please pay your attention to the following points at time of using the products shown in this document.
1. The products shown in this document (hereinafter ”Products”) are designed and manufactured to the generally accepted standards of
reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and
measurement equipment. The Products are not designed and manufactured to be used in any other special equipment requiring
extremely high level of reliability and safety, such as aerospace equipment, nuclear power control equipment, medical equipment,
transportation equipment, disaster prevention equipment, security equipment. The Products are not designed and manufactured to be
used for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the Products.
If you wish to use the Products in that apparatus, please contact our sales section in advance.
In the event that the Products are used in such apparatus without our prior approval, we assume no responsibility whatsoever for any
damages resulting from the use of that apparatus.
2. NPC reserves the right to change the specifications of the Products in order to improve the characteristics or reliability thereof.
3. The information described in this document is presented only as a guide for using the Products. No responsibility is assumed by us for any
infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise
under any patents or other rights of the third parties. Then, we assume no responsibility whatsoever for any damages resulting from that
infringements.
4. The constant of each circuit shown in this document is described as an example, and it is not guaranteed about its value of the mass
production products.
5. In the case of that the Products in this document falls under the foreign exchange and foreign trade control law or other applicable laws and
regulations, approval of the export to be based on those laws and regulations are necessary. Customers are requested appropriately take
steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
1-9-9, Hatchobori, Chuo-ku,
Tokyo 104-0032, Japan
Telephone: +81-3-5541-6501
Facsimile: +81-3-5541-6510
http://www.npc.co.jp/
Email:sales@npc.co.jp
ND14001-E-00 2014.07
SEIKO NPC CORPORATION - 19