MAX174BEWI-T Maxim Integrated, MAX174BEWI-T Datasheet - Page 9

• Manufacturer Part Number: MAX174BEWI-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX174BEWI-T

• Number Of Channels: 1
• Architecture: SAR
• Conversion Rate: 125 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended
• Snr: Yes
• Interface Type: Parallel
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-28 Wide
• Maximum Power Dissipation: 1000 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 10 V

Figure 3. Analog Equivalent Circuit
Table 1. Truth Table
After the conversion is completed, data can be obtained
by the microprocessor. The ADCs have the required
logic for 8-, 12-, and 16-bit bus interfacing, which is
determined by the 12/8 input. If 12/8 is high, the ADCs
are configured for a 16-bit bus. Data lines D0–D11 may
be connected to the bus as either the 12 MSBs or the 12
LSBs. The other 4 bits must be masked out in software.
For 8-bit bus operation, 12/8 is set low. The format is left
justified, and the even address, A0 low, contains the 8
MSBs. The odd address, A0 high, contains the 4 LSBs,
which is followed by 4 trailing 0s. There is no need to
use a software mask when the ADCs are connected to
an 8-bit bus.
Note that the output cannot be forced to a right-justified for-
mat by rearranging the data lines on the 8-bit bus interface.
CE
0
X
1
1
1
1
1
CS
X
1
0
0
0
0
0
R/C
X
X
0
0
1
1
1
REFIN
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2R* -50I
12/8
X
X
X
X
1
0
0
Industry-Standard, Complete 12-Bit ADCs
R*
A0
X
X
0
1
X
0
1
None
None
Initiate 12-bit conversion
Initiate 12-bit conversion
Enable 12-bit conversion
Enable 8 MSBs
Enable 4 LSBs + 4
trailing 0s
REFIN
2
OPERATION
DAC
2.5kI
MAX174/MX574A/MX674A
Table 2. MAX174/MX574A/MX674A Data
Format for 8-Bit Bus
High Byte
Low Byte
(A0 = 1)
(A0 = 0)
BIPOFF
SAR
9.950kI
HARDWIRING FOR 8-BIT DATA BUSES
MSB
D7
D3
MAX174
MX574A
MX674A
1.6kI
20V
D10
D6
D2
IN
5kI
5kI
27 (MSB)
10V
26 (D10)
16 (LSB)
25 (D9)
24 (D8)
23 (D7)
22 (D6)
21 (D5)
20 (D4)
19 (D3)
18 (D2)
17 (D1)
D5
D9
D1
IN
D4
D8
D0
D3
D7
0
D2
D6
0
D7
D6
D5
D4
D3
D2
D1
D0
D1
D5
0
D0
D4
0