Microlinear ML2035 Technical data
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Serial Input Programmable Sine Wave Generator
February 1997
ML2035
GENERAL DESCRIPTION
The ML2035 is a monolithic sinewave generator whose
output is programmable from DC to 25kHz. No external
components are required. The frequency of the sinewave
output is derived from either an external crystal or clock
input, providing a stable and accurate frequency
reference. The frequency is programmed by a 16-bit serial
data word. The ML2035 has a V
The ML2035 is intended for telecommunications and
modem applications that need low cost and accurate
generation of precise test tones, call progress tones, and
signaling tones.
amplitude of ±VCC/2.
OUT
FEATURES
■ Programmable output frequency - DC to 25kHz
■ Low gain error and total harmonic distortion
■ 3-wire SPI compatible serial microprocessor interface
with double buffered data latch
■ Fully integrated solution - no external components
required
■ Frequency resolution of 1.5Hz (±0.75Hz) with a
12MHz clock input
■ Onboard 3 to 12MHz crystal oscillator
■ Synchronous or asynchronous data loading capability
■ Compatible with ML2031 and ML2032 tone detectors
and ML2004 logarithmic gain/attenuator
BLOCK DIAGRAM
CLK IN
8
LATI
4
SCK
2
SID
3
CRYSTAL
OSCILLATOR
÷4
8-BIT
DAC
8
PHASE
ACCUMULATOR
& 512 POINT
SINE LOOK-UP
TABLE
16
16-BIT DATA LATCH
16
16-BIT SHIFT REGISTER
5kΩ 5kΩ
SMOOTHING
FILTER
-
+
ZERO
DETECT
V
OUT
V
CC
GND
V
6
5
7
SS
1
1
ML2035
PIN CONFIGURATION
ML2035
8-Pin PDIP (P08)
V
SS
SCK
SID
LATI
PIN DESCRIPTION
PIN NAME FUNCTION
1V
SS
2 SCK Serial clock. Digital input which
3 SID Serial input data which programs the
4 LATI Digital input which latches serial data
Negative supply (-5V).
clocks in serial data on its rising
edges.
frequency of V
OUT
.
into the internal data latch on falling
edges.
1
2
3
4
TOP VIEW
8
CLK IN
7
GND
6
V
OUT
5
V
CC
PIN NAME FUNCTION
5V
6V
CC
OUT
Positive supply (5V).
Analog output. V
OUT
swing is ±VCC/2.
7 GND Ground. All inputs and outputs are
referenced to this point.
8 CLK IN Clock input. The internal clock can be
generated by tying a 3 to 12MHz
crystal from this pin to GND, or
applying a digital clock signal directly
to the pin.
2
ABSOLUTE MAXIMUM RATINGS
ML2035
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
Lead Temperature (Soldering, 10 sec) ...................... 260ºC
Thermal Resistance (qJA) .................................... 110ºC/W
maximum ratings are stress ratings only and functional
device operation is not implied.
OPERATING CONDITIONS
V
.............................................................................................. 6.5V
CC
V
............................................................................................. -6.5V
SS
V
.................................................... V
OUT
- 0.3V to VCC + 0.3V
SS
Voltage on any other pin ........ GND - 0.3V to VCC + 0.3V
Input Current ........................................................±25mA
Junction Temperature .............................................. 150ºC
Temperature Range
ML2035CP ................................................. 0ºC to 70ºC
ML2035IP ............................................... -40ºC to 85ºC
VCC Range ...................................................4.5V to 5.5V
VSS Range ................................................. -4.5V to -5.5V
Storage Temperature Range...................... –65ºC to 150ºC
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 4.5V to 5.5V, VSS = -4.5V to -5.5V, CLK IN = 12.352MHz, CL = 100pF, RL = 1kW,
TA = Operating Temperature Range (Note 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
OUTPUT
HD Harmonic Distortion 20Hz to 5kHz -45 dB
(2nd and 3rd Harmonic) 5kHz to 25kHz -40 dB
SND Signal to Noise + Distortion 200Hz to 3.4kHz, -45 dB
f
BW = 20Hz to 4kHz
OUT
20Hz to 25kHz, -40 dB
f
BW = 20 Hz to 75kHz
OUT
V
ICN Idle Channel Noise Power Down Mode, Cmsg Weighted -20 0 dBrnc
Gain Error 20Hz < f
GN
5kHz < f
< 5kHz ±0.15 dB
OUT
< 25kHz ±0.3 dB
OUT
Power Down Mode, 1kHz 50 nV/ÖHz
PSRR Power Supply Rejection Ratio 200mV
Sine, Measured on V
V
V
OSCILLATOR
VIL CLK CLK IN Input Low Voltage 1.5 V
VIH CLK CLK IN Input High Voltage 3.5 V
IIL CLK CLK IN Input Low Current -250 µA
IIH CLK CLK IN Input High Current 250 µA
CIN CLK CLK IN Input Capacitance 12 pF
t
CKI
LOGIC (LATI, SID, SCK)
V
V
I
I
V
OS
P-P
IL
IH
IL
IH
Offset Voltage ±75 mV
OUT
Peak-to-Peak Output Voltage ±VCC/2 V
CLK IN On/Off Period tR = tF = 10ns, 2.5V Midpoint 30 ns
Input Low Voltage 0.8 V
Input High Voltage 2.0 V
Input Low Current VIN = 0V -1 µA
Input High Current VIN = V
, 0 - 10kHz V
P-P
OUT
CC
CC
V
SS
-40 dB
-40 dB
1µA
3
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