ML2037CP Micro Linear, ML2037CP Datasheet

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ML2037CP

Manufacturer Part Number
ML2037CP
Description
500 kHz,serial input, programmable sine wave generator with digital gain control
Manufacturer
Micro Linear
Datasheet
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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ML2037CP Summary of contents

Page 1

Sine Wave Generator with Digital Gain Control GENERAL DESCRIPTION The ML2037 is a precision programmable sine wave generator with a frequency range 500kHz. The device is capable of generating a wide frequency range of low distortion sine ...

Page 2

ML2037 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION GND Ground connection for the digital sections of the IC. 2 SYNC Synchronization input. Holding this pin low stops the sine wave output, and resets the phase to zero. ...

Page 3

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied ................................................................................. CC Voltage on any ...

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 ...

Page 5

FUNCTIONAL DESCRIPTION The ML2037 is composed of a programmable frequency generator, a sine wave generator, a crystal oscillator, and a digital interface. The functional block diagram is shown in Figure 1. PROGRAMMABLE FREQUENCY GENERATOR The programmable frequency generator produces a ...

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) • • • • • ...

Page 7

FUNCTIONAL DESCRIPTION microprocessor crystals meet the above requirements, but it is recommended to test the selected crystal in circuit to insure proper operation. Suitable crystals can be purchased from the following suppliers: ECS, Inc. FOX Electronics M-TRON Industries An external ...

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

PHYSICAL DIMENSIONS 16 PIN 0.02 MIN (0.50 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) 0.400 - 0.414 (10.16 - 10.52) 16 PIN 0.024 - 0.034 (0.61 - 0.86) (4 PLACES) ...

Page 10

... ML2037 ORDERING INFORMATION PART NUMBER 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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