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ETIC

ET2110 Datasheet Preview

ET2110 Datasheet

INTERPOLATION DEVICE

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INTERPOLATION DEVICE
(Interpolation factors of 1X or 10X)
ET2110
FEATURES
Interpolation factor pin selectable (1X/10X)
Index gating pin selectable (90/180 electrical
degrees of interpolated pulse)
Leading edge of gated index pulse occurs at
270 electrical degrees of analog input cycle,
regardless of interpolation factor selected
Interfaces directly with ET2010 Analog
Signal Processor and ET7272 Line Driver
Single supply operation
Handles Sine/Cosine inputs from DC to
125KHz
Sine/Cosine input voltage range 400mVpp to
4Vpp on 2.5VDC reference
Outputs are NPN Collector with 4K pull-up;
sink up to 4mA external load
Outputs TTL and CMOS compatible
DESCRIPTION
This ET2110 is a monolithic bipolar integrated circuit designed to facilitate increased resolution in optical encoder
applications by converting the incoming sine and cosine signals to an interpolated quadrature digital output at 1 or
5 times the input frequency. Please refer to the Timing Diagram. The device inputs receive photodiode signals
which have been amplified and conditioned to optimize the interpolation function. This conditioning may be
obtained from a companion device, the analog signal processor, ET2010. Following interpolation processing by the
ET2110, the output signal can be fed into a line driver device, such as the ET7272B, for driving extended loads.
Please see the Application Circuit.
In addition to processing the data channel information, the ET2110 provides a channel for the index signal which
controls the gating of the index pulse relative to the 0° and 90° input waveforms. Index gating is provided to
generate a pulse that commences at 270 electrical degrees of the analog input cycle. Width of the index pulse is
either 90 or 180 electrical degrees of the interpolated pulse (pin selectable).
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Operating Temperature Range
Storage Temperature Range
Supply Voltage Range
TA
TS
VCC
Min.
-40
-55
4.5
Max.
120
150
5.5
Units Comments
°C
V
Page 1 of 5
East Texas Integrated Circuits, 275 W. Campbell Rd. Suite 310, Richardson, TX 75080 ph.(972)234-5656 fax (972)234-5657
E-mail to Sales@etic-avago.com or visit our website, www.etic-avago.com .




ETIC

ET2110 Datasheet Preview

ET2110 Datasheet

INTERPOLATION DEVICE

No Preview Available !

ELECTRICAL CHARACTERISTICS
Unless otherwise specified, typical values given at VCC=5V, TA = 25°C, and VIN = 1.6V(P-P).
Parameters
Analog Supply Current
Digital Supply Current
Hysteresis REF Voltage
SIG_REF Input Current, high
Z_SIG Input Current, high
10X Select Input Current, high
Z_SEL Input Current, high
0_SIG, 90_SIG, and 180_SIG
SIG_REF Input Current, low
Z_SIG Input Current, low
10X Select Input Current, low
Z_SEL Input Current,low
Low Level Output Voltage,
A_OUT, B_OUT, and Z_OUT
High Level Output Voltage,
A_OUT, B_OUT, and Z_OUT
Quadrature Error (1X mode) ,
A_OUT to B_OUT (leading edges)
Quadrature Error (10X mode) ,
A_OUT to B_OUT (leading edges)
Pulse Symmetry (width), in 1X and
10X modes, A_OUT, B_OUT, and
Z_OUT
Frequency Response at Digital
Outputs
Internal Pull-up Resistor
Symbol
ICCA
ICCD
VREF
ISIG_REF
IZ SIG
I10X
ISEL
ISIG
ISIG_REF0
IZ SIG0
I10X0
ISEL0
VOL
VOH
E1X
E10X
PW10X
fCO
RINT
Min.
---
---
2.48
0
0
-50
-50
-2
-100
-500
-200
-200
---
4.9
-2
-20
-10
1000
3.0
Typ.
15.0
6.0
2.53
17
90
-25
-25
---
-47
-350
-125
-125
---
---
---
---
---
--
--
Max.
19.0
9.0
2.58
50
200
0
0
2
0
-100
0
0
400
Units
mA
mA
V
uA
µA
uA
uA
mA
uA
µA
uA
uA
mV
Test Conditions
VCC = 5.5V
VCC = 5.5V
SIG_REF=2.5V
VIN = 4.0V
VIN = 4.0V
VIN = 4.0V
VIN = 4.0V
VIN = 0V
VIN = 0V
VIN = 0V
VIN = 0V
Vcc=4.5V, IOL=4mA
-- V
VCC = 5.5V,
IOH = -100uA
2 °e * Note 3
20 °e * Note 3
10 %
-- KHz Note 1
5.0 KOhm Note 1
NOTES:
1. This is not a test parameter, but guaranteed by design.
2. Unused inputs should be connected to ground.
3. This symbol represents electrical degrees.
Page 2 of 5
East Texas Integrated Circuits, 275 W. Campbell Rd. Suite 310, Richardson, TX 75080 ph.(972)234-5656 fax (972)234-5657
E-mail to Sales@etic-avago.com or visit our website, www.etic-avago.com .


Part Number ET2110
Description INTERPOLATION DEVICE
Maker ETIC
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ET2110 Datasheet PDF






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