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DS4000
Digitally Controlled (DC)-TCXO
FEATURES
Aging
≤1.0ppm
per Year
Frequency Stability ±1.0ppm from -40°C to
+85°C
Frequency Versus Supply Stability of
±1.0ppm per Volt
−=
Base Frequency is Digitally Tunable by
±6.0ppm
−=
One Fixed-Frequency Output and One
(n + 1) or 2(n + 1) Division of the Base
Frequency Output
Temperature Measurements from -40C° to
+85°C with 10-Bit/+0.25°C Resolution and
±3°C Accuracy
2-Wire Serial Interface
GENERAL DESCRIPTION
The DS4000 digitally controlled temperature-
compensated crystal oscillator (DC-TCXO)
features a digital temperature sensor, one fixed-
frequency temperature-compensated square-wave
output (F
1
), one programmable temperature-
compensated square-wave output (F
2
), and digital
communication for frequency tuning (SDA,
SCL).
APPLICATIONS
Reference Oscillators in PLL Circuits
Global Positioning Systems
SATCOM
Telecom
Wireless Base Stations
ORDERING INFORMATION
PART
DS4000A0/WBGA
DS4000A0-N/WBGA
DS4000CW/WBGA
DS4000CW-N/WBGA
TEMP RANGE PIN-PACKAGE
0°C to +70°C
12 BGA
-40°C to +85°C 12 BGA
0°C to +70°C
12 BGA
-40°C to +85°C 12 BGA
Ordering information continued at end of data sheet.
PIN CONFIGURATION
TOP VIEW
A B
SCL
SDA
A0
GND
OSC
N.C.
GND
6
5
4
3
2
1
C D
F
2
V
CC
F
1
V
OSC
GND
GND
BGA
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
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102302
DS4000
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground
Storage Temperature Range
Soldering Temperature Range
-0.3V to +6.0V
-55°C to +85°C
See IPC/JEDEC J-STD-020A (2x max)
These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time can affect reliability.
OPERATING RANGE
RANGE
Commercial
Industrial
TEMP RANGE
0°C to +70°C
-40°C to +85°C
V
CC
5V ±5%
5V ±5%
RECOMMENDED DC OPERATING CONDITIONS
(Over the operating range)
PARAMETER
Supply Voltage
Oscillator Supply Voltage
Input Logic High
Input Logic Low
SYMBOL
V
CC
V
OSC
V
IH
V
IL
CONDITIONS
Notes 1, 2
Notes 1, 2
Note 1
Note 1
MIN
4.75
4.75
2.2
-0.3
TYP
5.0
5.0
MAX
5.25
5.25
V
CC
+ 0.3
+0.8
UNITS
V
V
V
V
DC ELECTRICAL CHARACTERISTICS
(Over the operating range)
PARAMETER
Active Supply Current
Active Oscillator Supply
Current
Output Logic High 2.4V
Output Logic Low 0.4V
Input Leakage
I/O Leakage
Temperature Conversion Time
SYMBOL
I
CC
I
OSC
I
OH
I
OL
I
LI
I
LO
t
CONVT
CONDITIONS
Notes 3, 4
Notes 3, 4
Note 1
Note 1
MIN
TYP
1.5
3.5
MAX
2
5.5
UNITS
mA
mA
mA
-1
4
1
1
mA
µA
µA
ms
Note 3
250
300
Note 1:
All voltages are referenced to ground.
Note 2:
For ±10% operating range, contact factory.
Note 3:
Typical values are at +25°C and nominal supplies.
Note 4:
These parameters are measured with the outputs disabled.
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DS4000
AC ELECTRICAL CHARACTERISTICS: TCXO
(Over the operating range)
PARAMETER
Output Frequency
Frequency Stability vs.
Temperature
Voltage
Aging
F
1
, F
2
Rise and Fall Time, 10%
to 90%
Max Output Capacitive Load
Duty Cycle
Phase Noise F1 Output, 10kHz
SYMBOL
F
1
F
2
CONDITION
CMOS (Note 5)
MIN
10
TYP
MAX
20
UNITS
MHz
∆F/T
A
∆F/V
∆F/Yr
t
R
, t
F
C
L
t
W
/ t
φ
N
Note 6
-1.0
+1.0
ppm
ppm/V
ppm/Yr
4
10
40
50
-130
60
ns
pF
%
dBc/Hz
Note 5:
F
1
is the base frequency as defined by the package markings. F
2
is a programmable frequency output. The output frequency of F
2
is
derived from the base frequency, F
1
, by programming the F
2
frequency select register and duty cycle (DC) bit in the TCXO control
register. The minimum output frequency is F
1
/ (2
8
+ 1) with DC = 0 and F
1
/ [2 x (2
8
+ 1)] with DC = 1.
Note 6:
10MHz, 5V, +25°C with one of the two outputs enabled.
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DS4000
AC ELECTRICAL CHARACTERISTICS: 2-WIRE SERIAL INTERFACE
(V
CC
= 4.75 to 5.25V, T
A
= -40°C to +85°C)
PARAMETER
SCL Clock Frequency
Bus Free Time Between
a STOP and START
Condition
Hold Time (Repeated)
START Condition
Low Period of SCL
Clock
High Period of SCL
Clock
Setup Time for a
Repeated START
Condition
Data Hold Time
SYMBOL
f
SCL
CONDITION
Fast mode
Standard mode
Fast mode
MIN
0
0
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0
0
100
250
20 + 0.1C
B
20 + 0.1C
B
20 + 0.1C
B
20 + 0.1C
B
0.6
4.0
TYP
MAX
400
100
UNITS
kHz
t
BUF
Standard mode
Fast mode (Note 7)
Standard mode (Note 7)
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
µs
t
HD:STA
µs
µs
t
LOW
t
HIGH
µs
t
SU:STA
Standard mode
Fast mode (Note 8)
Standard mode (Note 8)
Fast mode (Note 9)
Standard mode (Note 9)
µs
0.9
0.9
t
HD:DAT
µs
Data Setup Time
t
SU:DAT
ns
300
1000
300
1000
ns
Rise Time of Both SDA
and SCL
Fall Time of Both SDA
and SCL
Setup Time for STOP
Condition
Capacitive Load for
Each Bus Line
Input Capacitance
t
R
Fast mode (Note 9)
Standard mode (Note 9)
Fast mode (Note 10)
Standard mode (Note 10)
Fast mode
Standard mode
ns
t
F
t
SU:STO
C
B
C
I
µs
400
5
pF
pF
Note 10
Note 7:
After this period, the first clock pulse is generated.
Note 8:
The maximum t
HD:DAT
has only to be met if the device does not stretch the LOW period (t
LOW
) of the SCL signal.
Note 9:
A fast-mode device can be used in a standard mode system, but the requirement t
SU:DAT
>250ns must then be met. This is automatically
the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL
signal, it must output the next data bit to the SDA line t
RMAX
+ t
SU:DAT
(1000 + 250 = 1250ns) before the SCL line is released.
Note 10:
C
B
: Total capacitance of one bus line in pF.
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DS4000
Figure 1. Timing Diagram
PIN DESCRIPTIONS
PIN
1, 11, 12
2
3
4
5
6
7
8
9
10
NAME
GND
N.C.
GND
OSC
A
0
SDA
SCL
F
2
V
CC
F
1
V
OSC
FUNCTION
Ground. DC power is provided to the device on these pins.
No Connection
Oscillator Ground. DC power is provided to the oscillator on these pins.
2-Wire Slave Address Input. This pin is used to configure the slave address.
2-Wire Serial-Data Input/Output. SDA is the input/output pin for the 2-wire
serial interface. The SDA pin is open drain and requires an external pullup
resistor.
2-Wire Serial-Clock Input. SCL is used to synchronize data movement on the
serial interface. The SCL pin is open drain and requires an external pullup
resistor.
DC-TCXO Frequency Output
Power Supply. DC power is provided to the device on these pins.
DC-TCXO Frequency Output
Oscillator Power Supply. DC power is provided to the oscillator on these
pins.
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