Datasheet ULPO-RB1 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 32.768 kHz
SERIES „ULPO-RB1“
FEATURES
APPLICATIONS
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Ultra-Low Power Oscillator for Low Cost
Excellent long time reliability
Smallest footprint 1.5 x 0.8 mm
Ultra-low power: <1 µA
Directly interfaces to XTAL inputs
Supports coin-cell or super-cap battery backup voltages
Oscillator output eliminates external load caps
Internal filtering eliminates external VDD bypass cap
Programmable output swing to reduce power
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
F_tol
Frequency Tolerance[1]
F_stab
Frequency Stability[2] )
25°C Aging
10
PPM
TA = 25°C, post reflow, Vdd: 1.5V – 3.63V.
20
PPM
TA = 25°C, post reflow with board-level underfill, 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.
1.0
PPM
1st Year
+70
°C
Commercial
F_aging
-1.0
Operating Temperature Range
T_use
-10
–
-40
–
+85
°C
Industrial
Storage Temperature Range
T_stor
-55
–
+125
°C
Storage
VDD
1.2
3.63
V
TA = -10°C to +70°C
1.5
3.63
V
TA = -40°C to +85°C
OPERATING TEMPERATURE RANGE
SUPPLY VOLTAGE AND CURRENT CONSUMPTION
Operating Supply Voltage
Core Operating Current
IDD
[3]
Output Stage Operating Current
Power-Supply Ramp
Start-up Time at Power-up [4]
[3]
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
TA = -40°C to +85°C, Vdd: 1.5V – 3.63V. No load
100
ms
VDD Ramp-Up 0 to 90% VDD, TA = -40°C to +85°C
300
ms
TA = 25°C ±10°C, valid output
450
ms
TA = -40°C to +70°C, valid output
500
ms
TA = +85°C, valid output
Notes: 1.No board level underfill. Measured as peak-to-peak/2. Inclusive of 3x-reflow and ±20% load variation. 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. Initial offset is defined as the frequency deviation from the ideal 32.768 kHz at room temperature, post reflow.
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 +
output driver operating current, which is a function of the output voltage swing. See the description titled, Calculating Load Current.
4. Measured from the time VDD reaches 1.5V.
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PETERMANN-TECHNIK GmbH
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
GENERAL DATA (continued)
PARAMETER AND CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
CONDITION
nsRMS
Cycles = 10,000, TA = 25°C, VDD = 1.5V – 3.63V
200
ns
10-90% (VDD), 15 pF Load VDD= 1.5V to 3.63V
52
%
JITTER PERFORMANCE (TA = OVER TEMP)
Period Jitter
T_jitt
35
LVCMOS OUTPUT (STANDARD VERSION TA = –40/+85°C, TYPICAL VALUES ARE AT TA = 25°C)
Output Rise/Fall Time
tf, tf
100
Output Clock Duty Cycle
DC
48
Output Voltage High
VOH
90%
Output Voltage Low
VOL
10%
V
VDD: 1.5V – 3.63V. IOH = -10μA, 15 pF Load
V
VDD: 1.5V – 3.63V. IOL = 10μA, 15 pF Load
PROGRAMMABLE, REDUCED SWING OUTPUT (ADAPTABLE ACCORDING TO CUSTOMERS REQUIREMENT)
Output Rise/Fall Time
tf, tf
Output Clock Duty Cycle
DC
48
200
ns
52
%
30-70% (VOL/VOH), 10 pF Load
AC-coupled Programmable Output Swing
V_sw
0.20 to
0.80
V
ULPO-RB1 does not internally AC-couple. This output description is intended for a receiver that is AC-coupled.
VDD: 1.5V – 3.63V, 10 pF Load, IOH / IOL = ±0.2 μA.
DC-Biased Programmable Output Voltage High
Range
VOH
0.6 to
1.225
V
VDD: 1.5V – 3.63V. IOH = -0.2 μA, 10 pF Load.
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.
V
TA = -40°C to +85°C, VDD = 1.5V to 3.63V.
Programmable Output Voltage Swing
Tolerance
-0.055
0.055
EXCELLENT RELIABILITY DATA
MTBF
500 million hours
Shock Resistance
10.000 g
Vibration Resistance
70 g
PIN DESCRIPTION
Pin
Symbol
1,4
GND
I/O
Functionality
Power Supply
Connect to ground. Acceptable to connect pin 1 and 4 together. Both pins must be connected to GND.
Ground
2
CLK Out
OUT
3
VDD
Power Supply
Oscillator clock output. The CLK can drive into a Ref CLK input or into an ASIC or chip-set’s 32kHz XTAL input. When driving into an
ASIC or chip-set oscillator input (X IN and X Out), the CLK Out is typically connected directly to the XTAL IN pin. No need for load
capacitors. The output driver is intended to be insensitive to capacitive loading.
Connect to power supply 1.5V ≤ Vdd ≤ 3.63V. Under normal operating conditions, V DD does not require external bypass/
decoupling capacitor(s). For more information about the internal power-supply filtering, see Power-Supply Noise Immunity
section in the detailed description. Contact factory for applications that require a wider operating supply voltage range.
FIGURE 1. 1.5X0.8 MM PACKAGE (TOP VIEW)
GND
1
4
GND
CLK OUT
2
3
VDD
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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-RB1 is the smallest, lowest power 32.768 kHz oscillator optimized for mobile and other battery powered applications.
The silicon oscillator technology enables the smallest footprint
w i t h 1 . 5x 0 .8 mm packaging. This device reduces the 32.768 kHz
footprint by as much as 85% compared to existing 2.0 x 1.2 mm SMD XTAL package. Unlike XTALs, the ULPO-RB1 oscillator output enables greater component placement flexibility and eliminates external load capacitors, thus saving additional component count and board
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 to keep the footprint as small as possible. Internal power supply filtering is designed to reject more than ±150 mV
noise and frequency components from low frequency to more than 10
space. And unlike standard oscillators, the ULPO-RB1 features pro-
MHz.
grammable output swing, a factory programmable output that reduces
OUTPUT VOLTAGE
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.
The ULPO-RB1 oscillators consist of a silicon resonators and a programmable analog circuit using a key sealing process ensuring best
performance and reliability.
The ULPO-RB1 has two output voltage options. One option is a standard LVCMOS rail-to-rail DC-coupled output swing, which is mostly
used. The second option is the programmable reduced swing output
for reducing current consumption. Output swing is customer specific
and factory programmed between 200 mV and 800 mV. For DCcoupled applications, output VOH and VOL are individually factory
programmed to the customers’ requirement. VOH programming
FREQUENCY STABILITY
range is between 600 mV and 1.225V in 100 mV increments. Similarly,
The ULPO-RB1 is factory calibrated to guarantee frequency stabil-
ple; an IC or µP is internally 1.8V logic compatible and requires a 1.2V
ity to be less than ±10 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-RB1 temperature coefficient is
extremely flat across temperature. The device maintains less than
± 100 ppm frequency stability over the full operating temperature
range of –40/+85°C when the operating voltage is between 1.5 and
3.63V as shown in Figure 2.
VOL programming range is between 350 mV and 800 mV. For examVIH and a 0.6V VIL. Simply select ULPO-RB1 programmable output
swing factory programming code to be “D14” and the correct output
thresholds will match the downstream IC or µP input requirements.
Interface logic will vary by manufacturer and we recommend that you
review the input voltage requirements for the input interface. For DC
-biased output configuration, the minimum VOL is limited to 350mV
and the maximum allowable swing VOH - VOL) is 750mV. For example, 1.1V VOH and 400mV VOL is acceptable, but 1.2V VOH and 400 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.
VOL is not acceptable.
When the Output is interfacing to an XTAL input that is internally ACcoupIed, the ULPO-RB1 output can be factory programmed to match
the input swing requirements. For example, if a PMIC or MCU input is
internally AC-coupIed and requires an 800mV swing, then simply
When measuring the ULPO-RB1 output frequency with a frequency
counter, it is important to make sure the counter's gate time is
>100ms. The slow frequency of a 32.768 kHz clock will give false readings with faster gate times.
Contact Petermann-Technik for applications that require a wider
supply voltage range >3.63V or lower frequency options as low as
1Hz.
choose the ULPO-RB1 programming code "AA8" in the part number.
It is important to note that the ULPO-RB1 does not include internal
AC-coupling capacitors. Please see the Part Number Ordering section at the end of the datasheet for more information about the part
number ordering scheme.
FIGURE 2. PETERMANN-TECHNIK vs. QUARTZ
Frequency Stability (ppm)
150
ULPO-RB1-Industrial Temp Specification
100
50
ULPO-RB1 Measured
ULPO-RB1 ±10 ppm
max. @ 25°C
0
-50
Quartz XTAL
-100
-150
-40
–160 to –220 ppm over temp
-20
0
20
40
60
80
Temperature (C°)
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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
POWER-UP
TABLE 2. ACCEPTABLE AC-COUPLED SWING LEVELS
The ULPO-RB1 starts-up to a valid output frequency within 300 ms
(150ms typ). To ensure the device starts-up within the specified limit,
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.
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
EXAMPLE:
+
ULPO-RB1 PROGRAMMABLE OUTPUT SWING
Figure 4 shows a typical ULPO-RB1 output waveform (into a 10 pF
Programmable output swing part number coding: AA2. Example
part number: ULPO-RB1-1508-75-D-32.768KHZ-T-AA2
load) when factory programmed for a 0.70V swing and DC bias (VOH/
+
VOL) for 1.8V logic:
The values listed in Tables 1 and -2 are nominal values at 25°C and
EXAMPLE:
will exhibit a tolerance of ±55 mV across VDD and -40°C to 85°C oper-
+ Programmable output swing part number coding: D14. Example
part number: ULPO-RB1-18-1508-75-D-32.768KHZ-T-D14
Output voltage swing: 0.250V
ating temperature range.
ULPO-RB1 FULL SWING LVCMOS OUTPUT
The ULPO-RB1 can be factory programmed to generate full-swing
+ VOH = 1.1V, VOL = 0.4V (VSW = 0.70V)
LVCMOS levels. Figure 4 shows the typical LVCMOS waveform (V DD =
1.8V) at room temperature into a 15 pF load.
FIGURE 3. ULPO-RB1-33-1508-75-D-32.768KHZ-T-S OUTPUT
WAVEFORM (10 PF LOAD)
EXAMPLE:
+Standard LVCMOS rail-to-rail output part number coding is always S
+Example part number: ULPO-RB1-33-1508-75-D-32.768KHZ-T-S
FIGURE 4. LVCMOS WAVEFORM (VDD = 1.8V) INTO 15 PF LOAD
Table 1 shows the supported programmable output swing VOH, VOL
factory programming options.
TABLE 1. ACCEPTABLE VOH/VOL PROGRAMMABLE OUTPUT
SWING LEVELS
VOL/VOH
1.225
1.100
1.000
0.800
D28
D18
D08
0.900
0.800
0.700
0.600
0.700
D27
D17
D07
D97
0.525
D26
D16
D06
D96
D86
0.500
D25
D15
D05
D95
D85
D75
0.400
D14
D04
D94
D84
D74
D64
0.350
D13
D03
D93
D83
D73
D63
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. For these applications, refer to Table 2
for the acceptable voltage swing options.
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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-RB1, 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
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
Supply Current = 900nA + (65nA/V)(1.8V) = 1017nA
EXAMPLE 2: PROGRAMMED REDUCED SWING
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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+
+
+
+
+
+
+
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
PETERMANN-TECHNIK GmbH
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
TYPICAL OPERATING CURVES
FIGURE 6. FREQUENCY STABILITY OVER TEMPERATURE
Number of Devices
Frequency Stability (PPM)
FIGURE 5. INITIAL TOLERANCE HISTOGRAM
Temperature (°C)
Initial Tolerance (ppm)
TA = 25°C Post Reflow, No underfill
FIGURE 8. OUTPUT STAGE CURRENT OVER TEMPERATURE
Core Current (uA)
Output Stage Current (nA/Vpp)
FIGURE 7. CORE CURRENT OVER TEMPERATURE
Temperature (°C)
Temperature (°C)
Voltage (V)
FIGURE 9. START-UP TIME
Time (sec)
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
TYPICAL OPERATING CURVES
Frequency Error (ppm)
FIGURE 10. POWER SUPPLY NOISE REJECTION
(+/-150MV NOISE)
Noise Injection Frequency (Hz)
FIGURE 11. PROGRAMMABLE OUTPUT SWING WAVEFORM
(VOH = 1.1V, VOL = 0.4V, ULPO-RB1)
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FIGURE 12. LVCMOS OUTPUT WAVEFORM
(VSWING = 1.8V, ULPO-RB1)
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
DIMENSIONS AND PATTERNS
RECOMMENDED LAND PATTERN (UNIT:MM)
PACKAGE SIZE – DIMENSIONS (UNIT:MM)
1.55 X 0.85 MM
Ø 0.25 (4x) NSMD pads
#2
#1
Polymer
coating
#4
1.00 BSC
#3
#3
#2
0.41
#1
0.315±0.015
#4
0.41
BSC
#3
0.84±0.02
#4
0.60 max
0.04
1.54±0.02
#1
#2
1.00
0.35 (4x) Soldermask
opening
(soldermask openings shown with heavy dashed line)
Recommended 4-mil (0.1mm) stencil thickness
REFLOW SOLDER PROFILE
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Tel: +49/8191/305395 ∙ Fax: +49/8191/305397
[email protected] ∙ www.petermann-technik.com
ORDERING INFORMATION
SUPPLY VOLTAGE
OSCILLATOR
FAMILY
“X1“ ANY 1.2-3.63 FOR –10/+70°C
“X2“ ANY 1.5-3.63 FOR –40/+85°C
ULPO-RB1
TEMPERATURE
RANGE
FREQUENCY
32.768kHz
“D” for -10 +70°C
“W” for -40 +85°C
ULPO-RB1-X1-1508-75-D-32.768kHz-T-S
FREQUENCY
STABILITY
“75” for ±75 PPM
(-10 to 70ºC)
“100” for ±100 PPM
(-40 to 85ºC)
PACKAGE SIZE
“1508” for 1.5 X 0.8 mm
PACKING METHOD
“T”: TAPE & REEL
“T”: TAPE & REEL
3000 pcs. per Reel
Smaller quantities possible
OUTPUT DRIVE
STRENGTH
“S” Standard
(datasheet limits)
For rail-to-rail LVCMOS
DC-coupled
Please contact PETERMANN-TECHNIK for
other values
EXAMPLE: ULPO-RB1-X1-1508-75-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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