FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
The AL1209H is a CMOS 8-bit A/D converter for
micom
applications.
It
is
a
SAR
(Successive
Approximation Register) A/D converter which consists
of SAR, R_string DAC, 11bit resolution comparator
and output register buffer.
The
maximum
conversion
rate
of
AL1209H
is
200KSPS and supply voltage is 5V single.
TYPICAL APPLICATIONS
MICOM
Battery Charger
Game Pack
Digital Still Camera
Other Low power equipments.
FEATURES
Resolution : 8-bit
Differential Linearity Error : 0.3 LSB(typ)
Integral Linearity Error : 0.5 LSB(typ)
Maximum Conversion Rate : 200KSPS
Low Power Consumption : 4mW(typ.)
Power Supply : 5V Single
8-BIT 200KSPS ADC
AL1209H
SAMSUNG ELECTRONICS Co. LTD
Ver 1.3 (Apr. 2002)
No responsibility is assumed by SEC for its use nor for any infringements of patents
or other rights of third parties that may result from its use. The content of this data
sheet is subject to change without any notice.
DAC
SAR
OUTREG
COP
+
-
8
AIN
DOUT[7:0]
WRITE
CKGEN
FLAG
EOC
D7...D0
DAOUT
SEC ASIC
AL1209H
8-BIT 200KSPS ADC
MIXED
CORE PIN DESCRIPTION
NAME
I/O
TYPE
I/O PAD
PIN DESCRIPTION
REFP
AI
pia_bb
Internal Reference Top Bias. +5.0V
REFN
AI
pia_bb
Internal Reference Bottom Bias
VDDA
AP
vdda
Analog Power (+5.0V)
VSSA
AG
vssa
Analog Ground
AIN
AI
pia_bb
Analog Input
Input Span : REFN ~ REFP
CLK
DI
pic_bb
Clock Input
DOUT[7:0]
DO
pic_bb
Digital Output
WRITE
DI
pic_bb
A/D Conversion Start Signal
STOP
DI
pic_bb
Power Down
RESET
DI
pic_bb
System Reset
VBB
AG/DG
vbba
Analog/Digital Sub Bias
VSS
DG
vsst
Digital Ground
VDD
DP
vdd5t
Digital Power (+5.0V)
CORE CONFIGURATION
I/O TYPE ABBR.
AI : Analog Input
DI : Digital Input
AO : Analog Output
DO : Analog Output
AP : Analog Power
AG : Analog Ground
DP : Digital Power
DG : Digital Ground
AB : Analog Bidirection
DB : Digital Bidirection
AIN
STOP
REFN
WRITE
DOUT[0] (LSB)
DOUT[7] (MSB)
DOUT[1]
DOUT[2]
DOUT[3]
DOUT[4]
DOUT[5]
DOUT[6]
RESET
REFP
al1209h
CLK
VBB
VSS
VDD
VDDA
VSSA
REFP REFN
2/11
SEC ASIC
AL1209H
8-BIT 200KSPS ADC
MIXED
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Supply Voltage
VDD
5.0
V
Analog Input Voltage
AIN
REFN to REFP
V
Digital Input Voltage
CLK
VSS to VDD
V
Digital Output Voltage
V
OH
, V
OL
VSS to VDD
V
Reference Voltage
REFN/REFP
VSS to VDD
V
Storage Temperature Range
Tstg
-45 to 150
C
Operating Temperature Range
Topr
0 to 70
C
NOTES
1. ABSOLUTE MAXIMUM RATING specifies the values beyond which the device may be damaged permanently.
Exposure to ABSOLUTE MAXIMUM RATING conditions for extended periods may affect reliability. Each
condition value is applied with the other values kept within the following operating conditions and function
operation under any of these conditions is not implied.
2. All voltages are measured with respect to VSS unless otherwise specified.
3. 100pF capacitor is discharged through a 1.5k
resistor (Human body model)
RECOMMENDED OPERATING CONDITIONS
Characteristics
Symbol
Min
Typ
Max
Unit
Supply Voltage
VDDA - VSSA
VDD - VSS
4.75
5.0
5.25
V
Supply Voltage Difference
VDDA - VDD
-0.1
0.0
0.1
V
Reference Input Voltage
REFP
REFN
-
-
VDD
VSS
-
-
V
Analog Input Voltage
AIN
REFN
-
REFP
V
Clock High Time
Clock Low Time
Tpwh
Tpwl
-
-
49
49
-
-
ns
Digital Input 'L' Voltage
Digital Input 'H' Voltage
V
IL
V
IH
-
4.5
-
-
0.5
-
V
Operating Temperature
Topr
0
-
70
C
NOTES
1. It is strongly recommended that all the supply pins (VDDA, VDD) be powered from the same source to avoid
power latch-up.
3/11
SEC ASIC
AL1209H
8-BIT 200KSPS ADC
MIXED
DC ELECTRICAL CHARACTERISTICS
Characteristics
Symbol
Min
Typ
Max
Unit
Conditions
Resolution
-
-
8
-
bits
Reference Current
IREF
-
195
220
uA
REFP : 5.0V
REFN : 0.0V
Differential Linearity Error
DLE
-
0.3
0.5
LSB
AIN : REFN ~ REFP
(Ramp Input)
Integral Linearity Error
ILE
-
0.5
1.0
LSB
Fck : 2KHz
12MHz
Bottom Offset Voltage Error
EOB
-
6
19.5
mV
EOB = AIN(0,1) - REFN
Top Offset Voltage Error
EOT
-
19.5
39
mV
EOT = REFP - AIN(254,255)
NOTES
1. Converter Specifications (unless otherwise specified)
VDDA=5.0V
VDD=5.0V
VSSA=GND
VSS=GND VBB=GND
REFP=5.0V
REFN=0.0V
Ta=25 C
2. TBD : To Be Determined
3. Because of inserting the power down mode, EOT is over 1-LSB. If you don't use, REFP can be located at dot-line
and EOT is the same as EOB. See fig1.
AC ELECTRICAL CHARACTERISTICS
Characteristics
Symbol
Min
Typ
Max
Unit
Conditions
Clock High Time
Tpwh
-
49
-
ns
AIN : 1, 4KHz
(Sine Input)
fCK=12MHz.
Clock Low Time
Tpwl
-
49
-
ns
Conversion Rate
Fs
-
200
300
KSPS
Dynamic Supply Current
Is
-
0.8
1.2
mA
about the CORE
-
1.9
2
mA
output load=50pF, testpins are not
envolved.
-
5.1
5.8
mA
output load=50pF, testpins are
envolved.
100
-
-
nA
Power Down Mode
Power Dissipation
PD
-
4
6.5
mW
at A/D operating. about the
CORE
500
-
-
nW
Power Down Mode. about the
CORE
REFP
REFN
power down
fig1.
4/11
SEC ASIC
AL1209H
8-BIT 200KSPS ADC
MIXED
TIMING DIAGRAM
CLK
RESET
WRITE
~
~
~
previous digital datas
digital data out
AIN
STOP
48*CLK
54*CLK
CLK
RESET
WRITE
DOUT[7:0]
~
~
~
previous digital datas
digital data out
AIN
STOP
48*CLK
54*CLK(minimum interval time)
CLK
RESET
WRITE
~
~
previous digital datas maintains
digital data out
AIN
STOP
1. A/D operation
2. at STOP mode.
DOUT[7:0]
5/11
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