®
®
ADS-230/ADS-231
Low-Power, 12-Bit, 1.0/1.5MHz
Sampling A/D Converter
FEATURES
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12-bit resolution
1.0 and 1.5MHz throughput rates
Small 44-pin Leaded Chip Carrier
Single +5V supply
Low power, 75 and 200mW maximum
Low power "standby" mode
Outstanding dynamic performance
No missing codes over temperature
Built-in sample-and-hold
Optional two-channel input multiplexer
Ideal for both time and frequency-domain applications
INPUT/OUTPUT CONNECTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
FUNCTION
AGND
V
BS
V
B
V
R/16
V
T
V
TS
CH1
IN
NC
CH2
IN
NC
MUX OUT
ANALOG INPUT
AGND
AV
S
DGND C
SEL
PD
DGND C
MD
OE
RD
S/H
PIN
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
FUNCTION
AV
S
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
NC
BIT 10
BIT 11
BIT 12 (LSB)
EOC
INT
NC
DGND D
DGND C
DV
S
TEST
CS
GENERAL DESCRIPTION
The ADS-230 and ADS-231 are 12-bit, high speed CMOS
sampling analog-to-digital converters capable of minimum
sampling rates of 1.0 and 1.5MHz, respectively. Both models
feature excellent dynamic performance including a typical
SNR of 72dB for the ADS-230 and 70dB for the ADS-231.
The ADS-230 and ADS-231 are packaged in a small 44-pin
plastic Leaded Chip Carrier (LCC). Each model contains a
fast-settling sample/hold amplifier, a multipass (three-step
flash) A/D converter, timing and control logic, three-state
outputs, a two-channel multiplexer, and digital error correction
circuitry. Digital input and output levels are TTL.
Requiring only a single +5V supply, the ADS-230 typically
dissipates only 60mW and the ADS-231 only 170mW. Both
models offer a low-power "standby" mode resulting in typical
power dissipations of 100µW and 250µW, respectively. The
units offer a maximum unipolar input range of 0 to +5V. The
exact value of the input range is determined by an externally
applied reference voltage. Both models operate over the
extended –40 to +85°C temperature range.
AV
S
14,44
DV
S
25
V
TS
6
V
T
5
V
R/16
4
V
B
3
V
BS
2
PIN
43
42
41
40
39
38
37
36
35
33
32
31
29
ANALOG INPUT 12
SAMPLE
AND HOLD
12-BIT A/D CONVERTER
OUTPUT LATCH
AND
THREE-STATE
BUFFER
MUX OUT 11
CH1
IN
7
MULTIPLEXER
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
INT
EOC
CH2
IN
9
TIMING AND CONTROL CIRCUITRY
30
16
SEL
26,18,15
DGND C
27
DGND D
1,13
AGND
24
TEST
23
CS
22
S/H
21
RD
20
OE
19
MD
17
PD
Figure 1. ADS-220/-231 Simplified Block Diagram
DATEL, Inc., Mansfield, MA 02048 (U.S.A.)
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Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356
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Email: sales@datel.com
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Internet: www.datel.com
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
