ADN8810 Datasheet PDF - Analog Devices
Part Number | ADN8810 | |
Description | 12-Bit High Output Current Source | |
Manufacturers | Analog Devices | |
Logo | ||
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ADN8810
FEATURES
High precision 12-bit current source
Low noise
Long term stability
Current output from 0 mA to 300 mA
Output fault indication
Low drift
Programmable maximum current
24-lead 4 mm × 4 mm leadframe chip scale package
3-wire serial interface
APPLICATIONS
Tunable laser current source
Programmable high output current source
Automatic test equipment
GENERAL DESCRIPTION
The ADN8810 is a 12-bit current source with an adjustable
full-scale output current of up to 300 mA. The full-scale out-
put current is set with two external sense resistors. The output
compliance voltage is 2.5 V, even at output currents up to
300 mA.
The device is particularly suited for tunable laser control and
can drive tunable laser front mirror, back mirror, phase, gain,
and amplification sections. A host CPU or microcontroller
controls the operation of the ADN8810 over a 3-wire SPI®
interface. The 3-bit address allows up to eight devices to be
independently controlled while attached to the same SPI bus.
The ADN8810 is guaranteed with ± 4 LSB INL and ± 0.75 LSB
DNL. Noise and digital feedthrough are kept low to ensure low
jitter operation for laser diode applications. Full-scale and
scaled output currents are given in Equations 1 and 2,
respectively.
IFS
≈
VREF
10 × RSN
(1)
IOUT
=
Code × VREF
4096
×
1
RSN
×
⎜⎛
⎜⎝
RSN
15k
+ 0.1⎟⎟⎠⎞
(2)
FUNCTIONAL BLOCK DIAGRAM
5V 5V 3.3V
RESET
4.096V
SERIAL
INTERFACE
ADDRESS
ENCOMP DVDD AVDD PVDD
RESET
FB
VREF
CS
SCLK
ADN8810
IOUT
SDI
ADDR0-2
3 FAULT
RSN
SB AVSS DVSS DGND
RSN
1.6V
RSN
1.6V
D1
FAULT SB
INDICATION
Figure 1.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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ADN8810
TIMING CHARACTERISTICS1, 2
Table 2. Timing Characteristics
Parameter
Description
Min Typ Max Unit
fCLK SCLK Frequency
12.5 MHz
t1 SCLK Cycle Time
80 ns
t2 SCLK Width High
40 ns
t3 SCLK Width Low
40 ns
t4 CS Low to SCLK High Setup
15
ns
t5 CS High to SCLK High Setup
15
ns
t6 SCLK High to CS Low Hold
35
ns
t7 SCLK High to CS High Hold
20
ns
t8 Data Setup
15 ns
t9 Data Hold
2 ns
t10 CS High Pulsewidth
30 ns
t11 RESET Pulsewidth
40 ns
t12 CS High to RESET Low Hold
30
ns
NOTES
1Guaranteed by design. Not production tested.
2Sample tested during initial release and after any redesign or process change that may affect these parameters. All input signals are measured with tr = tf = 5 ns (10%
to 90% of DVDD) and timed from a voltage level of (VIL + VIH)/2.
SCLK
CS
SDI
RESET
t6
t4
t10
t8
t9
A3*
A2
t3
A1 A0
t1
t2
D11 D10
* ADDRESS BIT A3 MUST BE LOGIC LOW
Figure 2. Timing Diagram
t7 t5
D0
t12 t11
Rev. 0 | Page 5 of 16
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADN8810 electronic component. |
Information | Total 16 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ ADN8810.PDF Datasheet ] |
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