adc12041 National Semiconductor Corporation, adc12041 Datasheet - Page 6

• Manufacturer Part Number: adc12041
• Description: 12-bit Plus Sign 216 Khz Sampling Analog-to-digital Converter
• Manufacturer: National Semiconductor Corporation

www.national.com
t
t
t
t
t
t
t
t
t
t
t
t
t
V
I
C
TPR
CSWR
WRCS
WR
WRSETFalling
WRHOLDFalling
WRSETRising
WRHOLDRising
CSRD
RDCS
RDDATA
RDDATA
RDHOLD
t
t
t
t
OFF
Z
CAL
CONV
AcqSYNCOUT
The following specifications apply to the ADC12041, 13-bit data bus width, V
= 50 pF on data I/O lines
Digital Logic Input/Output Characteristics
Symbol
Converter AC Characteristics
Digital Timing Characteristics
The following specifications apply to the ADC12041 for V
version mode, f
2.048V common-mode voltage, and minimum acquisition time, unless otherwise specified. Boldface limits apply for T
= T
OL
The following specifications apply to the ADC12041 for V
version mode, f
2.048V common-mode voltage, and minimum acquisition time, unless otherwise specified. Boldface limits apply for T
= T
IN
Symbol
Symbol
MIN
MIN
to T
to T
MAX
MAX
Logic Low Output Voltage
TRI-STATE Output Leakage Current
D12–D0 Input Capacitance
CLK
Throughput Rate
Falling Edge of CS
to Falling Edge of WR
Active Edge of WR
to Rising Edge of CS
WR Pulse Width
Write Setup Time
Write Hold Time
Write Setup Time
Write Hold Time
Falling Edge of CS to Falling
Edge of RD
Rising Edge of RD
to Rising Edge of CS
Falling Edge of RD to Valid Data
Falling Edge of RD to Valid Data
Read Hold Time
; all other limits T
CLK
; all other limits T
Auto Zero Time
Full Calibration Time
CLK Duty Cycle
Conversion Time
Acquisition Time
(Programmable)
= 12.0 MHz, R
= 12.0 MHz, R
Parameter
Parameter
Parameter
A
A
S
S
= T
= T
= 25 , source impedance for V
= 25 , source impedance for V
J
J
= 25˚C
= 25˚C
Sync-Out Mode
Minimum for 13 Bits
Maximum for 13 Bits
Conditions
Sync-Out Mode (SYNC Bit = “0”)
9 Clock Cycles of Acquisition Time
WMODE = “1”
WMODE = “1”
WMODE = “0”
WMODE = “0”
8-Bit Mode (BW Bit = “0”)
13-Bit Mode (BW Bit = “1”)
V
I
V
V
OUT
A
A
OUT
OUT
S
+ = V
+ = V
+ = V
Conditions
= 1.6 mA
= 0V
=5V
6
D
D
D
Conditions
+ = 5V, V
+ = 4.5V
+ = 5V, V
REF
REF
(Continued)
+ and V
+ and V
(Note 10)
REF
REF
Typical
A
4946
+ = V
78
50
44
79
+ = 4.096V, V
+ = 4.096V, V
9
REF
REF
(Note 10)
−
D
−
Typical
+ = 5V, f
0.4
10
1 , fully differential input with fixed
1 , fully differential input with fixed
4946 clks + 120 ns
78 clks + 120 ns
79 clks + 120 ns
(Note 10)
9 clks + 120 ns
Typical
REF
REF
CLK
222
20
40
26
23
(Note 11)
0
0
0
0
− = 0.0V, 12-bit + sign con-
− = 0.0V, 12-bit + sign con-
Limits
= 12 MHz, t
40
60
44
(Note 11)
Limits
±
0.4
2.0
(Note 11)
Limits
30
20
20
58
44
32
5
5
f
= 3 ns and C
clks (max)
clks (max)
clks (max)
clks (max)
clks (max)
µA (max)
% (max)
% (min)
V (max)
(Limit)
(Limit)
A
ns (max)
ns (max)
ns (max)
A
Unit
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
Unit
(Limit)
pF
%
= T
= T
Unit
kHz
ns
ns
ns
ns
L
J
J