Datasheet ULPO-RB2 32.768 kHz

PETERMANN-TECHNIK GmbH
Lechwiesenstr. 13 ∙ D-86899 ∙ Landsberg am Lech
Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
ULTRA-LOW POWER OSCILLATOR
SERIES „ULPO-RB2“
FEATURES
APPLICATIONS
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Ultra-Low Power Oscillator for Low Cost
Excellent long time reliability
Pin-compatible to 2012 XTAL SMD packaging
±20 ppm frequency tolerance at 25°C
Ultra-low power: <1 µA
Supports coin-cell or super-cap battery backup voltages
VDD supply range: 1.5V to 3.63V over -40°C to +85°C
Oscillator output eliminates external load caps
Internal filtering eliminates external VDD bypass cap
Pb-free, RoHS and REACH compliant / [email protected]°
Smart Phones
Tablets
Health and Wellness Monitors
Fitness Watches
Sport Video Cams
Wireless Keypads
Ultra-Small Notebook PC
Pulse-per-Second (pps) Timekeeping
RTC Reference Clock
Battery Management Timekeeping
Wearables
IoT
GPS
Smart Metering
Home Automation
GENERAL DATA
PARAMETER AND CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
CONDITION
FREQUENCY
Fixed Output Frequency
F_out
32.768
kHz
FREQUENCY STABILITY
Frequency Tolerance [1]
Frequency Stability
F_tol
F_stab
[2]
25°C Aging
-1
20
PPM
TA = 25°C, post reflow, VDD: 1.5V – 3.63V
75
PPM
TA = -10°C to +70°C, VDD: 1.5V – 3.63V
100
PPM
TA = -40°C to +85°C, VDD: 1.5V – 3.63V
250
PPM
TA = -10°C to +70°C, VDD: 1.2V – 1.5V
1
PPM
1st Year
+70
°C
Commercial
OPERATING TEMPERATURE RANGE
Operating Temperature Range
T_use
Storage Temperature Range
T_stor
VDD
-10
–
-40
–
+85
°C
Industrial
-55
–
+125
°C
Storage
1.2
3.63
V
TA = -10°C to +70°C
1.5
3.63
V
TA = -40°C to +85°C
SUPPLY VOLTAGE AND CURRENT CONSUMPTION
Operating Supply Voltage
Core Operating Current [3]
Output Stage Operating Current [3]
Power-Supply Ramp
Start-up Time at Power-up [4]
IDD
IDD_out
0.90
0.065
t_VDD_Ramp
t_start
180
µA
TA = 25°C, VDD: 1.8V. No load
1.3
µA
TA = -10°C to +70°C, VDD max: 3.63V. No load
1.4
µA
TA = -40°C to +85°C, VDD max: 3.63V. No load
0.125
μA/Vpp
100
ms
TA = -40°C to +85°C, 0 to 90% VDD
300
ms
TA = -40°C ≤ TA ≤ +50°C, valid output
450
ms
TA = +50°C < TA ≤ +85°C, valid output
TA = -40°C to +85°C, VDD: 1.5V – 3.63V. No load
Notes: 1.Measured peak-to-peak. Tested with Agilent 53132A frequency counter. Due to the low operating frequency, the gate time must be ≥100 ms to ensure an accurate
frequency measurement.
2.Stability is specified for two operating voltage ranges. Stability progressively degrades with supply voltage below 1.5V. Measured peak-to-peak. Inclusive of Initial
Tolerance at 25°C, and variations over operating temperature, rated power supply voltage and load.
3.Core operating current does not include output driver operating current or load current. To derive total operating current (no load), add core operating current +
(0.065 µA/V) * (peak-to-peak output Voltage swing).
4. Measured from the time VDD reaches 1.5V.
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PETERMANN-TECHNIK GmbH
Lechwiesenstr. 13 ∙ D-86899 ∙ Landsberg am Lech
Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
GENERAL DATA (continued)
SYMBOL
PARAMETER AND CONDITIONS
MIN.
TYP.
MAX.
UNIT
CONDITION
STANDARD LVCMOS OUTPUT OPTION, TA = -40°C TO +85°C, TYPICAL VALUES ARE AT TA = 25°C
Output Rise/Fall Time
100
tr, tf
200
50
Output Clock Duty Cycle
DC
48
Output Voltage High
VOH
90%
Output Voltage Low
VOL
52
10%
10-90% (VDD), 15 pF load, Vdd = 1.5V to 3.63V
ns
10-90% (VDD), 5 pF load, Vdd ≥ 1.62V
%
0.9xVDD
VDD: 1.5V – 3.63V. IOH = -10 μA, 15 pF
0.1xVDD
VDD: 1.5V – 3.63V. IOL = 10 μA, 15 pF
PROGRAMMABLE, REDUCED SWING OUTPUT (ADAPTABLE TO CUSTOMER REQUIREMENST, FACTORY PROGRAMMED)
Output Rise/Fall Time
tf, tf
Output Clock Duty Cycle
DC
48
200
ns
52
%
30-70% (VOL/VOH), 10 pF Load
V
ULPO-RB2 does not internally AC-couple. This output description is intended for a receiver that is AC-coupled. See Table 2
for acceptable swing options.
VDD: 1.5V – 3.63V, 10 pF Load, IOH / IOL = ±0.2 μA.
AC-coupled Programmable Output Swing
V_sw
0.20 to
0.80
DC-Biased Programmable Output Voltage
High Range
VOH
0.60 to
1.225
V
VDD: 1.5V – 3.63V. IOH = -0.2 μA, 10 pF Load. See Table 1 for
acceptable VOH/VOL setting levels.
DC-Biased Programmable Output Voltage
Low Range
VOL
0.35 to
0.80
V
VDD: 1.5V – 3.63V. IOL = 0.2 μA, 10 pF Load. See Table 1 for
acceptable VOH/VOL setting levels.
Programmable Output Voltage Swing
Tolerance
-0.055
T_jitt
Period Jitter
0.055
35
V
nsRMS
TA = -40°C to +85°C, VDD = 1.5V to 3.63V.
Cycles = 10,000, TA = 25°C, VDD = 1.5V – 3.63V
EXCELLENT RELIABILITY DATA
MTBF
500 million hours
Shock Resistance
10.000 g
Vibration Resistance
70 g
PIN DESCRIPTION
SMD Pin
Symbol
I/O
1
GND
Power Supply
Ground
2
GND
Power Supply
Ground
3
CLK Out
OUT
VDD
Power Supply
4
Functionality
No Connect. Will not respond to any input signal. When interfacing to an MCU’s XTAL input pins, this pin is typically connected to
the receiving IC’s X Out pin. In this case, the ULPO-RB2 will not be affected by the signal on this pin. If not interfacing to an XTAL
oscillator, leave pin 1 floating (no connect).
Oscillator clock output. When interfacing to an MCU’s XTAL, the CLK Out is typcally connected to the receiving IC’s X IN pin. The
ULPO-RB2 oscillator output includes an internal driver. As a result, the output swing and operation is not dependent on capacitive loading. This makes the output much more flexible, layout independent, and robust under changing environmental and
manufacturing conditions.
Connect to power supply 1.5V ≤ Vdd ≤ 3.63V for operation over -40°C to +85°C temperature range. Under normal operating conditions, VDD does not require external bypass/decoupling capacitor (s). Internal power supply filtering will reject more than ±150
mVpp with frequency components through 10 MHz. Contact Petermann-Technik for applications that require a wider operating
supply voltage range.
FIGURE 1. SMD PACKAGE (TOP VIEW)
VDD
4
NC
1
3
CLK OUT
2
GND
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PETERMANN-TECHNIK GmbH
Lechwiesenstr. 13 ∙ D-86899 ∙ Landsberg am Lech
Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
DESCRIPTION
The ULPO-RB2 is an ultra-small and ultra-low power 32.768 kHz
oscillator optimized for mobile and other battery-powered applications. The ULPO-RB2 is pin-compatible and footprint compatible to
existing 2.0x1.2mm 32.768 kHz XTALs when using the recommended
solder pad layout. And unlike standard oscillators, the ULPO-RB2
features a factory programmable output that reduces the voltage
swing to minimize power.
The 1.2V to 3.63V operating supply voltage range makes it an ideal
solution for mobile applications that incorporate a low-voltage, battery-back-up source such as a coin-cell or super-cap.
When measuring the ULPO-RB2 output frequency with a frequency
counter, it is important to make sure the counter's gate time is
>100ms. The slow frequency of a 32 kHz clock will give false readings
with faster gate times.
For applications that require a wider supply voltage range>3.63V, or
operating frequency below 32.768 kHz, please consult PetermannTechnik.
FIGURE 4. ULPO-RB2 vs. QUARTZ
The ULPO-RB2 is a replacement to the 32.768 kHz XTAL in the 2.0x1.2
mm (2012) package. Unlike XTAL resonators, the ULPO-RB2 oscillators requires a power supply (VDD) and ground (GND) pin. VDD and
GND pins are conveniently placed between the two large XTAL pins.
When using the recommended solder pad layout (SPL), the ULPORB2 footprint is compatible with existing 32.768 kHz XTALs in the SMD
package 2.0x1.2mm. Figure 3 shows the comparison between the
quartz XTAL footprint and the ULPO-RB2 footprint. For applications
that require the smallest footprint solution, consider ULPO-RB1 XO
available in a 1.2mm2 housing.
Frequency Stability (ppm)
150
XTAL FOOTPRINT COMPATIBILITY (SMD PACKAGE)
ULPO-RB2-Ind.-Temp. Specification
100
50
ULPO-RB2 Measured
0
-50
Quartz XTAL
–160 to –220 ppm Over Temp
-100
-150
-40
-20
ULPO-RB2
X OUT
Connect to
X OUT or NC
x
GND 2 x
4 VDD
3
X IN
Clock Out
Connect to X IN
Top View
Top View
1
FREQUENCY STABILITY
The ULPO-RB2 is factory calibrated to guarantee frequency stability
to be less than ±20 ppm at room temperature and less than ±100 ppm
over the full -40°C to +85°C temperature range. Unlike quartz crystals that have a classic tuning fork parabola temperature curve with a
25°C turnover point, the ULPO-RB2 temperature coefficient is extremely flat across temperature. The device maintains less than ±100
ppm frequency stability over the full operating temperature range
when the operating voltage is between 1.5 and 3.63V as shown in
Figure 4.
0
20
40
60
80
Temperature (C°)
FIGURE 3. ULPO-RB2 FOOTPRINT COMPATIBILITY
WITH QUARTZ XTAL FOOTPRINT [5]
Quartz (2012)
ULPO-RB2
±20 ppm Max@ 25C
POWER SUPPLY NOISE IMMUNITY
In addition to eliminating external output load capacitors common
with standard XTALs, this device includes special power supply filtering and thus, eliminates the need for an external VDD bypassdecoupling capacitor. This feature further simplifies the design and
keeps the footprint as small as possible. Internal power supply filtering is designed to reject AC-noise greater than ±150 mVpp magnitude
and beyond 10 MHz frequency component.
OUTPUT VOLTAGE
The ULPO-RB2 has two output voltage options. One option is a standard rail-to-rail DC-coupled LVCMOS output swing. The second option
is the programmable reduced swing output allowing to reduce current and which is fully adaptable to customers requirement. Output
swing is customer specific and programmed between 200 mV and 800
mV.
Functionality is guaranteed over the 1.2V - 3.63V operating supply
voltage range. However, frequency stability degrades below 1.5V and
steadily degrades as it approaches the 1.2V minimum supply due to
the internal regulator limitations. Between 1.2V and 1.5V, the frequency stability is ±250 ppm max over temperature.
Note: 5.On the ULPO-RB2 device, X IN is not internally connected and will not
respond to any signal. It is acceptable to connect to chipset X OUT.
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
For DC-coupled applications, output VOH and VOL are individually fac-
Table 1 shows the supported programmable output swing VOH, VOL
tory programmed to the customers’ requirement. VOH programming
factory programming options.
range is between 600 mV and 1.225V in 100 mV increments. Similarly,
VOL programming range is between 350 mV and 800 mV. For example:
a PMIC or MCU is internally 1.8V logic compatible, and requires a
TABLE 1. ACCEPTABLE VOH/VOL PROGRAMMABLE OUTPUT
SWING LEVELS
1.2V VIH and a 0.6V VIL. Simply select ULPO-RB2 factory programming
code to be “D14” and the correct output thresholds will match the
downstream IC or MCU input requirements. Interface logic will vary
by manufacturer and we recommend that you review the input voltage requirements for the input interface.
VOL/VOH
1.225
1.100
1.000
0.800
D28
D18
D08
0.700
D27
D17
D07
D97
0.525
D26
D16
D06
D96
D86
0.500
D25
D15
D05
D95
D85
D75
D04
D94
D84
D74
D64
D03
D93
D83
D73
D63
For DC-biased output configuration, the minimum VOL is limited to
0.400
D14
350mV and the maximum allowable swing (VOH - VOL) is 750mV. For
0.350
D13
0.900
0.800
0.700
0.600
example, 1.1V VOH and 400mV VOL is acceptable, but 1.2V VOH and 400
mV VOL is not acceptable.
When the output is interfacing to an XTAL input that is internally ACcoupled, the ULPO-RB2 output can be factory programmed to match
the input swing requirements. For example, if a IC or MCU input is
internally AC-coupled and requires an 800mV swing, then simply
choose the ULPO-RB2 programming code “AA8” in the part number.
It is important to note that the ULPO-RB2 does not include internal
Table 2 shows the supported AC coupled Swing levels. The “ACcoupled” terminology refers to the programming description for applications where the downstream chipset includes an internal ACcoupling capacitor, and therefore, only the output swing is important
and VOH/VOL are not relevant.
TABLE 2. ACCEPTABLE AC-COUPLED SWING LEVELS
AC-coupling capacitors. Please see the Part Number Ordering sec-
SWING
0.800
0.700
0.600
0.500
0.400
0.300
0.250
0.200
Output Code
AA8
AA7
AA6
AA5
AA4
AA3
AA2
AA1
tion at the end of the datasheet for more information about the part
number ordering scheme.
POWER-UP
The ULPO-RB2 starts-up to a valid output frequency within 300 ms
(150ms typ). To ensure the device starts-up within the specified limit,
EXAMPLE:
+
make sure the power-supply ramps-up in approximately 10 - 20ms
(to within 90% of VDD). Start-up time is measured from the time VDD
reaches 1.5V. For applications that operate between 1.2V and 1.5V,
the start-up time will be longer.
ULPO-RB2 PROGRAMMABLE OUTPUT SWING
Programmable output swing part number coding: AA2. Example
part number: ULPO-RB2-2012-75-D-32.768kHz-T-AA2
+
Output voltage swing: 0.250V
The values listed in Tables 1 and -2 are nominal values at 25°C and
will exhibit a tolerance of ±55 mV across VDD and -40°C to 85°C operating temperature range.
ULPO-RB2 FULL SWING LVCMOS OUTPUT
Figure 4 shows a typical ULPO-RB2 output waveform (into a 10 pF
load) when factory programmed for a 0.70V swing and DC bias (V OH/
VOL) for 1.8V logic:
The ULPO-RB2 can be factory programmed to generate full-swing
LVCMOS levels. Figure 5 shows the typical LVCMOS waveform (V DD =
1.8V) at room temperature into a 15 pF load.
EXAMPLE:
+ Programmable output swing part number coding: D14. Example
part number: ULPO-RB2-18-2012-75-D-32.768kHz-T-D14
FIGURE 6. LVCMOS WAVEFORM (VDD = 1.8V) INTO 15 PF LOAD
+ VOH = 1.1V, VOL = 0.4V (VSW = 0.70V)
FIGURE 5. ULPO-RB2 OUTPUT WAVEFORM (10 PF LOAD)
EXAMPLE:
+LVCMOS output part number coding is always S (standard version)
+Example part number: ULPO-RB2-33-2012-75-D-32.768kHz-T-S
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
CALCULATING LOAD CURRENT
NO LOAD SUPPLY CURRENT
TOTAL SUPPLY CURRENT WITH LOAD
When calculating no-load power for the ULPO-RB2, the core and output
driver components need to be added. Since the output voltage swing
can be programmed for reduced swing between 250 mV and 800 mV,
the output driver current is variable. Therefore, no-load operating
supply current is broken into two sections; core and output driver. The
equation is as follows:
To calculate the total supply current, including the load, follow the
equation listed below. Note the 30% reduction in power with programmable output swing.
Total Supply Current (no load) = IDD Core + (65nA/V)(Voutpp)
EXAMPLE 1: FULL-SWING LVCMOS
EXAMPLE 1: FULL-SWING LVCMOS
+ VDD = 1.8V
+ IDD Core = 900nA (typ)
+ Voutpp = 1.8V (LVCMOS)
Supply Current = 900nA + (65nA/V)(1.8V) = 1017nA
EXAMPLE 2: PROGRAMMED REDUCED SWING
+
+
+
VDD = 1.8V
IDD Core = 900nA (typ)
Voutpp (Programmable) = VOH – VOL = 1.1V - 0.6V = 500 mV
Supply Current = 900nA + (65nA/V)(0.5V) = 932nA
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Total Current = IDD Core + IDD Output Driver (65nA/V*Voutpp) + Load
Current (C*V*F)
+
+
+
+
+
+
VDD = 1.8V
IDD Core = 900nA
Load Capacitance = 10pF
IDD Output Driver: (65nA/V)(1.8V) = 117nA
Load Current: (10pF)(1.8V)(32.768kHz) = 590nA
Total Current = 900nA+117nA+590nA = 1.6µA
EXAMPLE 2: PROGRAMMED REDUCED SWING
+
+
+
+
+
+
+
VDD= 1.8V
IDD Core = 900nA
Load Capacitance = 10pF
Voutpp (Programmable): VOH – VOL = 1.1V - 0.6V = 500mV
IDD Output Driver: (65nA/V)(0.5V) = 33nA
Load Current: (10pF)(0.5V)(32.768kHz) =164nA
Total Current = 900nA + 33nA + 164nA = 1.1µA
PAGE 5 OF 10 I SPEC 01 I REV.00 I NOVEMBER 2014
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
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TYPICAL OPERATING CURVES
FIGURE 8. FREQUENCY STABILITY OVER TEMPERATURE
Number of Devices
Frequency Stability (PPM)
FIGURE 7. INITIAL TOLERANCE HISTOGRAM
Initial Tolerance (ppm)
TA = 25°C Post Reflow, No underfill
FIGURE 10. OUTPUT STAGE CURRENT OVER TEMPERATURE
Core Current (uA)
Output Stage Current (nA/Vpp)
FIGURE 9. CORE CURRENT OVER TEMPERATURE
Temperature (°C)
Temperature (°C)
Temperature (°C)
Voltage (V)
FIGURE 11. START-UP TIME
Time (sec)
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TYPICAL OPERATING CURVES
Frequency Error (ppm)
FIGURE 12. POWER SUPPLY NOISE REJECTION
(+/-150MV NOISE)
Noise Injection Frequency (Hz)
FIGURE 13. PROGRAMMABLE OUTPUT SWING WAVEFORM
(VOH = 1.1V, VOL = 0.4V; ULPO-RB2)
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FIGURE 14. LVCMOS OUTPUT WAVEFORM
(VSWING = 1.8V, ULPO-RB2)
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DIMENSIONS AND PATTERNS
RECOMMENDED LAND PATTERN (UNIT:MM)
PACKAGE SIZE – DIMENSIONS (UNIT:MM)
ONLY SPL
2.0 X 1.2 MM SMD
6
6
#4
#4
#3
#1
XTAL COMPATIBLE SPL
#2
#3
#1
#2
6
REFLOW SOLDER PROFILE
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[email protected] ∙ www.petermann-technik.com
ORDERING INFORMATION
OSCILLATOR
FAMILY
SUPPLY VOLTAGE
“X1“ any 1.2-3.63 for –10/+70°C
“X2“ any 1.5-3.63 for –40/+85°C
ULPO-RB2
TEMPERATURE
RANGE
“D” for -10 +70°C
“W” for -40 +85°C
FREQUENCY
32.768kHz
ULPO-RB2-X1-2012-75-D-32.768kHz-T-S
FREQUENCY
STABILITY
“75” for ±75 PPM
(-10 to 70ºC )
“100” for ±100 PPM
(-40 to 85ºC)
PACKING METHOD
“T”: TAPE & REEL
3000 pcs. per Reel
Smaller quantities possible
PACKAGE SIZE
OUTPUT DRIVE
STRENGTH
“2012” for 2.0 X 1.2 mm
“S” Standard
(datasheet limits)
For Rail-to-Rail LVCMOS
DC-coupled
Please contact
PETERMANN-TECHNIK for
other values
EXAMPLE: ULPO-RB2-X1-2012-75-D-32.768kHz-T-S
PLEASE INDICATE YOUR REQUIRED PARAMETERS
EXPRESS SAMPLES ARE DELIVERABLE ON THE SAME DAY
IF ORDERED UNTIL 02:00 PM!
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
PREMIUM QUALITY BY
PETERMANN-TECHNIK
OUR COMPANY IS CERTIFIED ACCORDING TO ISO
9001:2008 IN OCTOBER 2013 BY THE DMSZ CERTIFIKATION GMBH.
THIS IS FOR YOU TO ENSURE THAT THE PRINCIPLES OF QUALITY MANAGEMENT ARE FULLY IMPLEMENTED IN OUR QUALITY MANAGEMENT
SYSTEM AND QUALITY CONTROL METHODS ALSO
DOMINATE OUR QUALITY STANDARDS.
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