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Lens Driver. HV895 Datasheet

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Lens Driver. HV895 Datasheet






HV895 Driver. Datasheet pdf. Equivalent




HV895 Driver. Datasheet pdf. Equivalent





Part

HV895

Description

Liquid Lens Driver



Feature


HV895 Liquid Lens Driver Features ► Dr ives capacitive loads up to 200pF ► P rogrammable drive amplitude (up to 60VR MS) ► On-chip boost converter ► No external inductor www.DataSheet4U.com I2C interface ► Low operating curr ent (≤20mA) ► Low standby current ( ≤1.0µA) ► Controlled drive edge re duces EMI ► 1.0mm × 6.0mm flip-chip General Description The HV895 is designed .
Manufacture

Supertex

Datasheet
Download HV895 Datasheet


Supertex HV895

HV895; to drive liquid lenses of up to 200pF wi th a 1.5kHz waveform at amplitudes up t o 60VRMS, controlled via an I2C interfa ce. A single byte (AMP) written to the HV895 controls the operation of the dri ver. Setting AMP = 01h to FFh controls output amplitude in 255 monotonic steps . Setting AMP = 00h causes the HV895 to go into low power standby mode, consum ing less than 1.0µ.


Supertex HV895

A. When active, the HV895 draws less tha n 20mA. A charge pump boost converter i ntegrated on-chip provides the high vol tage necessary for driving the lens. No external inductors or diodes are neede d. Two ceramic 0402 size capacitors are the only external components required for a complete lens driver circuit. The narrow die size and only 2 small exter nal components all.


Supertex HV895

ow an entire lens driver circuit to be i ncorporated inside a camera module. An H-bridge output stage provides AC drive to the lens, allowing the use of a sin gle high voltage boost converter while providing alternating polarity to the l ens. Controlled rising and falling edge s on the drive waveform reduces EMI. Th e HV895 is offered in a 1.0mm × 6.0mm lead-free solderbum.

Part

HV895

Description

Liquid Lens Driver



Feature


HV895 Liquid Lens Driver Features ► Dr ives capacitive loads up to 200pF ► P rogrammable drive amplitude (up to 60VR MS) ► On-chip boost converter ► No external inductor www.DataSheet4U.com I2C interface ► Low operating curr ent (≤20mA) ► Low standby current ( ≤1.0µA) ► Controlled drive edge re duces EMI ► 1.0mm × 6.0mm flip-chip General Description The HV895 is designed .
Manufacture

Supertex

Datasheet
Download HV895 Datasheet




 HV895
HV895
Liquid Lens Driver
Features
Drives capacitive loads up to 200pF
Programmable drive amplitude (up to 60VRMS)
On-chip boost converter
No external inductor
www.DataSheeIt24CU.icnotmerface
Low operating current (≤20mA)
Low standby current (≤1.0µA)
Controlled drive edge reduces EMI
1.0mm × 6.0mm flip-chip
Applications
Cell phone and PDA cameras
Bar code readers
Web and laptop cameras
Biometric scanners
Ultracompact cameras
Typical Application Circuit
I2C bus
General Description
The HV895 is designed to drive liquid lenses of up to 200pF with
a 1.5kHz waveform at amplitudes up to 60VRMS, controlled via an
I2C interface.
A single byte (AMP) written to the HV895 controls the operation of
the driver. Setting AMP = 01h to FFh controls output amplitude in
255 monotonic steps. Setting AMP = 00h causes the HV895 to go
into low power standby mode, consuming less than 1.0µA. When
active, the HV895 draws less than 20mA.
A charge pump boost converter integrated on-chip provides the
high voltage necessary for driving the lens. No external inductors
or diodes are needed. Two ceramic 0402 size capacitors are the
only external components required for a complete lens driver
circuit. The narrow die size and only 2 small external components
allow an entire lens driver circuit to be incorporated inside a
camera module.
An H-bridge output stage provides AC drive to the lens, allowing
the use of a single high voltage boost converter while providing
alternating polarity to the lens. Controlled rising and falling edges
on the drive waveform reduces EMI.
The HV895 is offered in a 1.0mm × 6.0mm lead-free solder-
bumped flip-chip.
VDD
1.7 -2.95V
VIN
2.65 - 5.5V
CIN
2.2μF
6.3V
VDD
SDA
SCL
VIN1
VIN2
HV895
OUT1
OUT2
HV GND1 GND2
CHV
4.7nF
100V
Liquid Lens
100 -200pF




 HV895
HV895
Ordering Information
Device
Die Option
HV895BD
This product is RoHS compliant (‘Green’)
Lead-free
solder-bumped die
Ball Configuration
DUM1
GND1
DUM2
VIN1
VDD
SDA
GND2
SCL
VIN2
HV
www.DataSheet4U.com
Absolute Maximum Ratings
Parameter
Value
VIN, VDD
SDA, SCL
-0.5V to 6.5V
-0.5V to 6.5V
Operating temperature
-40°C to +85°C
Storage temperature
-65°C to +150°C
Device may not meet specifications, but will incur no damage.
OUT2
OUT1
Solder-bumped Die
(bottom view)
Product Marking
HV 8 9 5 B D
YW
LLLLLLLLLL
Orientation
mark
Y = Year
W = Week
L = Lot Number
Solder-bumped Die
(top view)
Recommended Operating Conditions
Sym Parameter
Min Typ Max Units Conditions
VIN Supply voltage
2.65 -
5.5
V
VDD I2C logic level reference
1.70 - 2.95
V
tVIN Time for VIN to ramp to 90%(1)
- - 2.0 ms
CIN Supply bypass capacitor
- 2.2 -
μF
CHV High voltage storage capacitor
24 -
- x CLOAD
CLOAD Load (lens) capacitance
100 150 200
pF
fSCL I2C clock
- - 400 kHz
TA Ambient temperature
-25 - +85 OC
Notes:
1. To assure the driver powers up in standby state. No damage will occur if ramped up slower.
---
---
---
---
100V rating
---
---
---
Electrical Specifications (Over recommended operating conditions @ 25OC unless otherwise specified)
Sym Parameter
Min Typ Max Units Conditions
IIN VIN supply current
IDD VDD supply current
HV
Output voltage of internal boost
converter
-
- 500 nA AMP = 00h, SDA = V , SCL = V
DD DD
8.0 20 mA AMP = FFh, SDA = VDD, SCL = VDD
-
- 500 nA AMP = 00h, SDA = VDD, SCL = VDD
9.0 12 μA AMP = FFh, SDA = VDD, SCL = VDD
71 75 79
V CLOAD = 0pF
2




 HV895
HV895
Electrical Specifications (cont.)(Over recommended operating conditions @ 25OC unless otherwise specified)
Sym Parameter
Min Typ Max Units Conditions
VOUT(AC) AC output voltage
-
9.0
55.0
0
9.6
59.7
-
10.0
62.7
VRMS
AMP = 00h
AMP = 01h
AMP = FFh
VOUT(DC)
DNL
DC output offset voltage
Differential non-linearity (guaran-
teed monotonic)
-2.0 0 +2.0 V ---
-0.5 - +0.5 LSB ---
fOUT Output frequency
D Transition time (fraction of period)
X
www.DataSheet4U.com
dV/dt Output slope
tSU Startup time to 90% amplitude1
tA Amplitude response time1
1.0 1.5 2.0 kHz ---
- 4.7 -
% ---
- 4.7 - V/μs CLOAD = 150pF, VIN = 3.8V
- - 20 ms AMP = 00h → FFh, CHV = 4.7nF
-
-
5.0
ms
Over any 1-step AMP increment or
decrement (except 00h)
VIL Logic low input voltage
- - 0.30 x VDD ---
VIH Logic high input voltage
0.7 -
- x VDD ---
VOL Logic low output voltage
- - 0.2 x VDD ILOAD = 3.0mA
IL Logic low input current
- - 10 μA VDD = 1.70 - 2.95V
IH Logic high input current
- - 10 μA VDD = 1.70 - 2.95V
CLI Logic input capacitance
- - 10 pF VDD = 1.70 - 2.95V, grounded or open
Notes:
1. Measured from the rising edge of the I2C acknowledge bit that terminates transmission of the AMP data byte.
Block Diagram and Typical Application
VANA
2.65 – 5.50V
CIN
2.2µF
VDIG
6.3V
1.70 – 2.95V
VIN2
VIN1 DC/DC
GND1
CHV
4.7nF
100V
HV
DAC
VDD
8
Host
Controller
I2C bus
SDA
SCL
Control amp
enable
Osc
GND2
HV895
H-bridge
driver
OUT1
OUT2
CLENS
100 – 200pF
3



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