파트넘버.co.kr ZN448E 데이터시트 PDF


ZN448E 반도체 회로 부품 판매점

8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER



ETC 로고
ETC
ZN448E 데이터시트, 핀배열, 회로
ZN448/ZN449
8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER
DS3013 - 2.2
The ZN448 and ZN449 are 8-bit successive
approximation A-D converters designed to be easily
interfaced to microprocessors. All active circuitry is contained
on-chip including a clock generator and stable 2.5V bandgap
reference, control logic and double buffered latches with
reference.
Only a reference resistor and capacitor, clock resistor and
capacitor and input resistors are required for operation with
either unipolar or bipolar input voltage.
FEATURES
s Easy Interfacing to Microprocessor, or operates as a
'Stand-Alone' Converter
s Fast: 9 microseconds Conversion time Guaranteed
s Choice of Linearity: 0.5 LSB - ZN448, 1 LSB - ZN449
s On-Chip Clock
s Choice of On-Chip or External Reference Voltage
s Unipolar or Bipolar Input Ranges
s Commercial Temperature Range
ORDERING INFORMATION
Device type
Linearity Operating
error (LSB) temperature
ZN448E
0.5 0°C to +70°C
ZN449D
1 0°C to +70°C
ZN449E
1 0°C to +70°C
Package
DP18
MP18
DP18
BUSY (END OF CONVERSION) 1
RD (OUTPUT ENABLE) 2
CLOCK 3
WR (START CONVERSION) 4
REXT 5
VIN
VREF IN
6
7
VREF OUT 8
GROUND 9
18 DB0 (LSB)
17 DB1
16 DB2
15 DB3
14 DB4
13 DB5
12 DB6
11 DB7 (MSB)
10 +VCC (+5V)
ZN448/9E (DP18)
BUSY (END OF CONVERSION)
RD (OUTPUT ENABLE)
CLOCK
WR (START CONVERSION)
REXT
VIN
VREF IN
VREF OUT
GROUND
1
2
3
4
5
6
7
8
9
ZN449D (MP18)
18
17
16
15
14
13
12
11
10
Fig.1 Pin connection - top view
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7 (MSB)
+VCC (+5V)
ANALOGUE
INPUT
VREF IN
6
7
8
VREF OUT
2.5V
REFERENCE
8-BIT DAC
GROUND 9
VCC (+5V) 10
SUCCESSIVE
APPROXIMATION REGISTER
3-STATE BUFFERS
11 12 13 14 15 16 17 18
DB7
DB0
Fig.2 System diagram
COMPARATOR
+
-
5
REXT
CLOCK
GENERATOR
INTERFACE
AND
CONTROL
LOGIC
3 CK RC OR
EXT CLOCK
4
WR
1
BUSY
2
RD


ZN448E 데이터시트, 핀배열, 회로
ZN448/9
ABSOLUTE MAXIMUM RATINGS
Supply voltage VCC
Max. voltage, logic and VREF input
Operating temperature range
Storage temperature range
+7
+VCC
0°C to +70°C (MP and DP package)
-55°C to +125°C
ELECTRICAL CHARACTERISTICS (at VCC = 5V, Tamb = 25°C and fCLK = 1.6MHz unless otherwise specified).
Parameter
ZN448
Linearity error
Differential linearity error
Zero transition
(0000000000000001)
Full-scaletransition
(11111110 11111111)
Min. Typ. Max.
Units
Conditions
- - ±0.5
- - ±0.75
12 15 18
2.545 2.550 2.555
LSB
LSB
mV
V
DP package
VREF = 2.560V
ZN449
Linearity error
Differential linearity error
Zero transition
(0000000000000001)
Full-scaletransition
(11111110 11111111)
-
-
7
10
2.542
-
-
12
15
2.550
±1
±1
17
20
2.558
LSB
LSB
mV MP package
mV DP package
V VREF = 2.560V
All Types
Resolution
Linearity temperature coefficient
Differential linearity temperature coefficient
Full-scale temperature coefficient
Zero temperature coefficient
Reference input range
Supply voltage
Supply current
Power consumption
Comparator
Input current
Input resistance
Tail current
Negative supply
Input voltage
On-chip reference
Output voltage
ZN448
ZN449
Slope resistance
V temperature coefficient
REF
Reference current
8- -
bits
- ±3 - ppm/°C
- ±6 - ppm/°C
- ±2.5 - ppm/°C
- ±8 - µV/°C
1-3
V
4.5 5 5.5
V
- 25 40
mA
- 125 200 mW
-1-
- 100 -
25 65 150
-3 -5 -30
-0.5 - +3.5
µA
V
IN
=
+3V,
R
EXT
=
82k
k
µA V - = -5V
V
V
2.520
2.520
-
-
4
2.550
2.550
0.5
50
-
2.580
2.600
2
-
15
V
ppm/°C
mA
R
REF
=
390
C
REF
=
4µ7
2




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