Inter-m GEQ-1231D, Руководство по обслуживанию

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GENERAL DESCRIPTION
The AD7819 is a high speed, microprocessor-compatible, 8-bit analog-to-digital converter with a maximum
throughput of 200kSPS. The converter operates off a single 2.7V to 5.5V supply and contains a 4.5µs
successive approximation A/D converter, track/hold circuitry, on-chip clock oscillator and 8-bit wide parallel
interface. The parallel interface is designed to allow easy interfacing to microprocessors and DSPs. Using
only address decoding logic the AD7819 is easily mapped into the microprocessor address space.
When used in its power-down mode, the AD7819 automatically powers down at the end of a conversion
and powers up at the start of a new conversion. This feature significantly reduces the power consumption
of the part at lower throughput rates. The AD7819 can also operate in a high speed mode where the part is
not powered down between conversions. In this mode of operation the part is capable of providing 200
kSPS throughput.
The part is available in a small, 16-lead 0.3" wide, plastic dual-in-line package (DIP); in a 6-lead, 0.15"
wide, narrow body small outline IC (SOIC) and in a 16-lead, narrow body, thin shrink small outline package
(TSSOP).
AD7819 2.7V to 5.5V, 200 kSPS 8-bit SAMPLING ADC
FEATURES
– 8-Bit ADC with 4.5 µs Conversion Time
– On-Chip Track and Hold
– Operating Supply Range : 2.7V to 5.5V
– Specifications at 2.7V-3.6V and 5V ± 10%
– 8-Bit Parallel Interface : 8-Bit Read
– Power Performance
Normal Operation : 10.5mW,V
DD
=3V
– Automatic Power-Down : 57.75µW@1kSPS,V
DD
=3V
– Analog Input Range : 0V to V
REF
– Reference Input Range : 1.2V to V
DD
FUNCTIONAL BLOCK DIAGRAM
SO14 :
plastic small outline package; 14 leads; body width 3.9 mm
NOTE : Plastic or metal protrusions of 0.15 mm maximum per side are not included.
DIMENSIONS
(inch dimensions are derived from the original mm dimensions)
Unit
A
max.
A
1
A
2
A
3
b
p
c D (1) E (1) e H
E
L L
P
Q v w y z (1)
European
Projection
Issue Date
SOT108-1 076E06S MS-012AB
91-08-13
95-01-23
mm
inches
1.75
0.069
0.25
0.10
0.0098
0.0039
0.49
0.36
0.019
0.014
4.0
3.8
0.16
0.15
6.2
5.8
0.24
0.23
1.05
0.041
0.25
0.01
0.25
0.01
0.1
0.004
8°
0°
0.7
0.3
0.028
0.012
1.0
0.4
0.039
0.016
0.7
0.6
0.028
0.024
1.27
0.050
8.75
8.55
0.35
0.34 0.25
0.19
0.0098
0.0075
1.45
1.25
0.057
0.049
0.25
0.01
Outline
Version
Iec Jedec Eiaj
References