ml2037 Micro Electronics Corporation, ml2037 Datasheet

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ml2037

Manufacturer Part Number
ml2037
Description
500khz, Serial Input, Programmable Sine Wave Generator With Digital Gain Control
Manufacturer
Micro Electronics Corporation
Datasheet

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Part Number:
ml2037IS
Manufacturer:
ML
Quantity:
20 000
GENERAL DESCRIPTION
The ML2037 is a precision programmable sine wave
generator with a frequency range of DC to 500kHz. The
device is capable of generating a wide frequency range
of low distortion sine waves with no external passive
components. The frequency of the sine wave output is
programmed by a 16-bit word that is loaded through a
serial input. The sine wave output frequency is determined
by the programmed value and the clock frequency. The
clock frequency is derived from either an external crystal
connected to the device or an external clock input to
provide a stable and accurate frequency reference.
The sine wave output of the ML2037 is filtered and has a
programmable amplitude that is digitally programmed in
0.5V steps. The maximum amplitude is 2.0V
at a 2.5V level. The device functions from a single 5V
power supply and has a shutdown pin to put the device
into a low power mode that disables the output. A sync
input is provided to allow the synchronization of more
than one device in a system.
BLOCK DIAGRAM
Sine Wave Generator with Digital Gain Control
16
13
9
1
5
3
7
4
6
2
AGND
CLK IN
D GND
D GND
CLK OUT
S ENABLE
S CLK
S DATA IN
SYNC
DV CC
OSCILLATOR
CRYSTAL
AV CC
500kHz, Serial Input, Programmable
2
P-P
REFERENCE
11
centered
16-BIT SHIFT REGISTER
16-BIT DATA LATCH
12
ACCUMULATOR
SINE LOOK-UP
AV CC
512 POINT
PHASE
TABLE
8-BIT
DAC
8
16
16
SHDN
FEATURES
Programmable output frequency:
3-wire SPI compatible serial interface with double
buffered latch for programming the frequency
Digital gain control for programming output amplitude
SYNC input for synchronization of multiple sine waves
Shutdown pin for sleep mode
Single 5V power supply operation
8
SMOOTHING
CONTROL &
G0
GAIN
FILTER
DC to 400kHz—using a crystal
DC to 500kHz—using an external digital clock
14
G1
15
OUT
10
ML2037*
October 1998
1

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ml2037 Summary of contents

Page 1

... The sine wave output of the ML2037 is filtered and has a programmable amplitude that is digitally programmed in 0.5V steps. The maximum amplitude is 2. 2.5V level. The device functions from a single 5V power supply and has a shutdown pin to put the device into a low power mode that disables the output ...

Page 2

... SHDN A logic high on this pin causes the output of the generator to shut off and places the low power standby mode. 2 ML2037 16-Pin PDIP (P16) 16-Pin Wide SOIC (S16W) D GND SYNC 2 ...

Page 3

... CLK OUT to CLK IN Frequency Ratio Lead Temperature (Soldering, 10 sec) ..................... 260ºC Thermal Resistance ( Plastic DIP ....................................................... 80ºC/W SOIC .............................................................. 105ºC/W OPERATING CONDITIONS 7V + 0.3V CC Temperature Range ML2037CX ................................................. 0ºC to 70ºC ML2037IX ............................................... -40ºC to 85º 4.75V to 5.25V, SHDN = 0V, CLK IN = 25.6MHz (crystal Operating Temperature Range (Note 1) ...

Page 4

... ML2037 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER OSCILLATOR (Continued) t CLK OUT Rise Time R t CLK OUT Fall Time F LOGIC V Input Low Voltage IL V Input High Voltage IH I Input Low Current IL I Input High Current IH V Output Low Voltage OL V Output High Voltage OH f Serial Clock Frequency ...

Page 5

... The resultant voltage on V OUT harmonic distortion components at least 40dB below the fundamental. The ML2037 has a 2-bit (G1, G0) digital gain control. With the gain input equal to logic 00, the sine wave amplitude is equal to 0.5V control input increases the output amplitude in 0.5V steps to a maximum of 2.0V accurate to within ± ...

Page 6

... ML2037 BINARY PHASE ACCUMULATOR CRYSTAL CLK IN OSCILLATOR Figure 1. Detailed Block Diagram of the ML2037. 6 16-BIT S DATA IN SHIFT REGISTER (16 BITS) • • • 16-BIT S ENABLE DATA LATCH (16 BITS) • • • • • • – 21-BIT ADDER SUM (21 BITS) • ...

Page 7

... The frequency of this clock can be anything from 0 to 32MHz. However, at clock frequencies below 5MHz, the sine wave output begins to exhibit "staircasing". The ML2037 has a clock output that can be used to drive other external devices. The CLK OUT output is a buffered output from the oscillator which runs at one half the frequency of CLK IN ...

Page 8

... ML2037 CLOCK OSCILLATOR µCONTROLLER Figure 3. Synchronizing Two ML2037 Sine Wave Generators. 8 CLK IN S DATA IN S CLK OUT S ENABLE SYNC ML2037 CLK IN S DATA IN S CLK OUT S ENABLE SYNC ML2037 ...

Page 9

... BSC (1.40 - 1.65) (2.54 BSC) 0.015 MIN (0.38 MIN) SEATING PLANE 0.016 - 0.022 (0.40 - 0.56) Package: S16W 16-Pin Wide SOIC 0.291 - 0.301 0.398 - 0.412 (7.39 - 7.65) (10.11 - 10.47) 0.050 BSC (1.27 BSC) 0.095 - 0.107 (2.41 - 2.72) 0º - 8º 0.005 - 0.013 SEATING PLANE (0.13 - 0.33) ML2037 0.295 - 0.325 (7.49 - 8.26) 0.008 - 0.012 0º - 15º (0.20 - 0.31) 0.022 - 0.042 0.009 - 0.013 (0.56 - 1.07) (0.22 - 0.33) 9 ...

Page 10

... ML2037CP (OBS) ML2037CS (OBS) ML2037IP (OBS) ML2037IS (EOL) © Micro Linear 1998 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; ...

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