19-4240; Rev 0; 8/08
High-Voltage Liquid Lens Driver
MAX14515
General Description
The MAX14515 high-voltage liquid lens driver features a
high-voltage differential output controlled through an I
2
C
interface. The MAX14515 uses a charge-pump-based
boost converter and integrated H-bridge to provide a
compact lens driver solution with minimal external com-
ponents to achieve a small overall footprint suitable for
small space constraints inside camera modules.
The MAX14515 features an 8-bit monotonic DAC with a
single differential high-voltage output controlled by a
2-wire I
2
C interface to set the amplitude. The high-volt-
age outputs are capable of delivering up to 42V
RMS
(min) into a 220pF liquid lens load at 1.0kHz (min).
The MAX14515 also features two power-saving modes
(shutdown mode and sleep mode) to minimize power
consumption when the device is inactive. Shutdown
mode places the device in a low-power state that resets
all registers and disables the I
2
C interface to reduce cur-
rent below 500nA (max). In sleep mode, the power-on
reset circuit remains active. If no activity is detected on
the I
2
C interface, current consumption is less than 3µA.
The MAX14515 operates over the +2.7V to +5.5V sup-
ply voltage range, ideal for portable applications using
lithium ion battery sources. The MAX14515 is specified
over the -40°C to +85°C extended temperature range
and is available in a small (1mm x 2mm) 8-bump WLP
package.
Features
o
Small Footprint for Placement Inside Camera
Modules
o
47V
RMS
Maximum Output (C
LENS
= 220pF)
o
I
2
C-Compatible Interface for Setting Output
Voltage
o
8-Bit Output Voltage Resolution
o
Guaranteed Monotonic Output
o
±15kV Human Body Model ESD Protection on
Outputs
o
Low 500nA (max) Shutdown Current
o
+2.7V to +5.5V Input Voltage Range
o
Space-Saving, 8-Bump WLP (1mm x 2mm) Package
Applications
Autofocus Camera Modules
Barcode Readers
Webcams
PART
MAX14515EWA+
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 WLP
TOP
MARK
+AAA
+Denotes
a lead-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
(BUMP SIDE DOWN)
1
Typical Application Circuit
0.1μF
2.8V
1μF
1.8V
MAX14515
2
3
4
V
DD
SCL
EN
GND
V
A
LIQUID
LENS
V
B
V
REF
SDA
+
A
MAX14515
V
A
GND
SCL
EN
B
SDA
V
DD
V
REF
V
B
IMAGE
SIGNAL
PROCESSOR
WLP
1mm x 2mm
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
High-Voltage Liquid Lens Driver
MAX14515
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
DD
........................................................................-0.3V to +6.0V
V
A,
V
B
.....................................................................-0.3V to +52V
V
REF
.........................................MAX (-0.3V, V
DD
- 0.3V) to +6.0V
SDA, SCL, EN........................................................-0.3V to +6.0V
Continuous Power Dissipation (T
A
= +70°C):
8-Bump WLP (derate 5.2mW/°C above +70°C)...........416mW
Junction-to-Ambient Thermal Resistance (q
JA
) (Note 1)
8-Bump WLP ..............................................................192°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, C
VDD
= 0.1µF, C
REF
= 1µF, C
LENS
= 220pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
V
DD
= +2.8V and T
A
= +25°C.) (Note 2)
PARAMETER
Input Voltage
Input Supply Current
Reference Output Voltage
Shutdown Supply Current
Sleep Supply Current
POR Threshold
HIGH-VOLTAGE OUTPUTS (V
A
, V
B
)
Peak Output Voltage (Note 3)
Output RMS Voltage
Output Voltage Ripple
Pulldown Strength
Output Switching Frequency
CONTROL INPUTS (SDA, SCL, EN)
Input Logic-High Voltage
Input Logic-Low Voltage
Output Logic-Low Voltage
Input Low Leakage Current
Input High Leakage Current
Input Capacitance
V
IH
V
IL
V
OL
I
IL
I
IH
C
IN
I
SINK
= 3mA
EN = V
CC
EN = GND
0.01
0.01
0.01
10
1.5
0.5
0.4
6
0.5
2.5
V
V
V
µA
µA
pF
V
PEAK
V
RMS
V
RPL
RL
PD
f
LENS
VP = 0x01
VP = 0xFF
VP = 0x01
VP = 0xFF
C
LENS
= 120pF
SM
= 0
1
1.1
42
±250
2
1.2
10
52
10
47
V
V
mV
kΩ
kHz
SYMBOL
V
DD
I
DD
V
REF
I
SHDN
I
SLEEP
V
TH_POR
EN = GND
SM
= 0,
SDA = SCL
V
EN
= 1.8V, V
DD
= 4.2V
V
EN
= V
DD
, V
DD
= 2.8V
1
8
1.2
3
2.6
Peak output voltage register (VP) = 0xFF
CONDITIONS
MIN
2.7
9
5.5
500
TYP
MAX
5.5
UNITS
V
mA
V
nA
µA
V
2
_______________________________________________________________________________________
High-Voltage Liquid Lens Driver
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, C
VDD
= 0.1µF, C
REF
= 1µF, C
LENS
= 220pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
V
DD
= +2.8V and T
A
= +25°C.) (Note 2)
PARAMETER
Resolution
Least Significant Bit
Integral Nonlinearity
Differential Nonlinearity
SYMBOL
N
LSB
INL
DNL
(Note 5)
VP = any value to any other value
transition; time to settle within 7 LSBs of
final value, Figure 1
Peak output voltage register = FFh
Time to settle within 7 LSBs of peak value,
Figure 1
Figure 2
100
400
1.3
0.6
1.3
0.6
0.6
0
100
300
300
0.6
400
Human Body Model
IEC 61000-4-2
Human Body Model
±15
±4
±2
0.9
(Note 4)
-4
-1
CONDITIONS
MIN
TYP
8
157.5
+4
+1
MAX
UNITS
Bits
mV
LSB
LSB
OUTPUT-VOLTAGE STATIC PERFORMANCE (V
A
, V
B
)
MAX14515
OUTPUT VOLTAGE DYNAMIC PERFORMANCE (V
A
, V
B
)
Peak-Output Voltage Settling Time
Output Slew Rate
Wake-Up Time
Shutdown Time
I
2
C INTERFACE
Serial-Clock Frequency
Bus Free Time Between START and
STOP Condition
Hold Time for Repeated START
Condition
Low Period for SCL Clock
High Period for SCL Clock
Setup Time for Repeated START
Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL Signals
Fall Time of Both SDA and SCL Signals
Setup Time for STOP Condition
Capacitive Load for Each Bus Line
ESD PROTECTION
V
A,
V
B
All Other Pins
kV
kV
f
SCL
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
r
t
f
t
SU:STO
C
b
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs
pF
t
SV
SR
V
t
WAKE
t
SHDN
1
5
2
ms
V/µs
ms
µs
Note 2:
Note 3:
Note 4:
Note 5:
All devices are tested at T
A
= +25°C. All temperature limits are guaranteed by design.
V
PEAK
is the average peak output voltage of V
A
or V
B
.
V
PEAK
= 9.5V + (N-1) x 0.1575, (accuracy ±3%).
Guaranteed monotonic.
_______________________________________________________________________________________
3
High-Voltage Liquid Lens Driver
MAX14515
Timing Diagrams
V
A
- V
B
t
WAKE
t
SV
SDA
WAKE
COMMAND
SET VP
COMMAND
Figure 1. Wake-Up and Peak Output Voltage Settling Timing Diagram
4
_______________________________________________________________________________________
High-Voltage Liquid Lens Driver
Timing Diagrams (continued)
MAX14515
V
A
- V
B
t
SHDN
50μs
SDA
EN
SLEEP
COMMAND
OR EN LOW
EN
HIGH
I
2
C
READY
Figure 2. Shutdown/Sleep Mode Timing Diagram
_______________________________________________________________________________________
5
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