ADC-228A Datasheet, PDF (1/4 Pages) Murata Power Solutions Inc. – 8-Bit, 20MHz, Complete Flash A/D Converter

www.murata-ps.com
FEATURES
■ _{8-Bit flash A/D converter}
■ _{20MHz sampling rate}
■ _{Complete support circuitry}
■ _{Low power, 900mW}
■ _{Sample-hold not required}
■ _{Three-state outputs}
■ _{MIL-STD-883 versions}
ADC-228A
8-Bit, 20MHz, Complete Flash A/D Converter
PRODUCT OVERVIEW
The ADC-228A combines analog front-end
circuitry and a flash A/D converter to digitize
high-speed analog signals at a rate of 20 million
samples per second. The ADC-228A contains an
8-bit, 20MHz, flash A/D, a wideband analog input
buffer, a precision voltage reference, temperature
compensation circuitry, reference trims, and a
three-state output buffer in a 24-pin package.
The ADC-228A offers significant savings by
combining all of the circuitry in a single package.
Valuable board real estate is saved, and design
time and manufacturing costs are reduced.
The ADC-228A is housed in a 24-pin ceramic
DDIP package and is available in the commercial,
0 to +70°C, or military, –55 to +125°C, tem-
perature ranges. A MIL-STD-883 version is also
available. Operation is from ±15V and +5V power
supplies.
INPUT/OUTPUT CONNECTIONS
Pin
FUNCTION
Pin
FUNCTION
1
+5V SUPPLY
24
BIT 8 (LSB)
2
GROUND
23
BIT 7
3
+5V REFERENCE OUT
22
BIT 6
4
GROUND
21
BIT 5
5
ANALOG INPUT
20
NO CONNECTION
6
GROUND
19
+15V SUPPLY
7
GROUND
18
CLOCK INPUT
8
NO CONNECTION
17
BIT 4
9
NO CONNECTION
16
BIT 3
10
–15V SUPPLY
15
BIT 2
11
CS1
14
BIT 1 (MSB)
12
CS2
13
NO CONNECTION
CS1 11
CS2 12
NO CONNECTION 8
NO CONNECTION 9
CLOCK 18
ANALOG INPUT 5
+15V SUPPLY 19
–15V SUPPLY 10
GROUND 7
GROUND 6
GROUND 4
GROUND 2
+5V SUPPLY 1
INPUT
BUFFER
LINEARIZATION
& TEMPERATURE
COMPENSATION
NETWORK
8-BIT
20MHz
FLASH
CONVERTER
VOLTAGE
REFERENCE
NETWORK
TRI-STATE
BUFFER
13 NO CONNECTION
20 NO CONNECTION
14 BIT 1 (MSB)
15 BIT 2
16 BIT 3
17 BIT 4
21 BIT 5
22 BIT 6
23 BIT 7
24 BIT 8 (LSB)
3 +5V REF. OUT
Ḥ
For full details go to
www.murata-ps.com/rohs
Figure 1. Functional Block Diagram
www.murata-ps.com
Technical enquiries email: [e-mail], tel: [phone]
MDA_ADC-228A.B01 Page 1 of 4