MAX503CAG Ver la hoja de datos (PDF) - Maxim Integrated
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Fabricante
MAX503CAG Datasheet PDF : 16 Pages
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5V, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC
______________________________________________________________Pin Description
PIN
NAME
FUNCTION
1
D7/ S1
D7 input when A0 = A1 = 1, or S1 input when A0 = 0 and A1 = 1. Always set S1 to 0.*
2
D8/ D0
D8 input when A0 = A1 = 1, or D0 input when A0 = 0 and A1 = 1.*
3
D9/ D1
D9 input when A0 = A1 = 1, or D1 input when A0 = 0 and A1 = 1.*
4
D2
D2 Input Data, or tie to S0 and multiplex when A0 = 1 and A1 = 0.*
5
D3
D3 Input Data, or tie to S1 and multiplex when A0 = 1 and A1 = 0.*
6
D4
D4 Input Data, or tie to D0 and multiplex when A0 = 1 and A1 = 0.*
7
D5
D5 Input Data, or tie to D1 and multiplex when A0 = 1 and A1 = 0.*
8
A0
Address Line A0. With A1, used to multiplex 4 of 12 data lines to load low (NBL), middle (NBM),
and high (NBH) 4-bit nibbles. (12 bits can also be loaded as 8+4.)
9
A1
Address Line A1. Set A0 = A1 = 0 for NBL and NBM, A0 = 0 and A1 = 1 for NBL, A0 = 1 and A1 =
0 for NBM, or A0 = A1 = 1 for NBH. See Table 2 for complete input latch addressing.
10
WR
Write Input (active low). Used with CS to load data into the input latch selected by A0 and A1.
11
CS
Chip Select (active low). Enables addressing and writing to this chip from common bus lines.
12
DGND
Digital Ground
13
REFIN
Reference Input. Input for the R-2R DAC. Connect an external reference to this pin or a jumper to
REFOUT (pin 18) to use the internal 2.048V reference.
14
AGND
Analog Ground
15
CLR
Clear (active low). A low on CLR resets the DAC latches to all 0s.
16
LDAC
Load DAC Input (active low). Driving this asynchronous input low transfers the contents of the input
latch to the DAC latch and updates VOUT.
17
REFGND
Reference Ground must be connected to AGND when using the internal reference. Connect to VDD
to disable the internal reference and save power.
18
REFOUT Reference Output. Output of the internal 2.048V reference. Tie to REFIN to drive the R-2R DAC.
19
VSS
Negative Power Supply. Usually ground for single-supply or -5V for dual-supply operation.
20
VOUT
Voltage Output. Op-amp buffered DAC output.
21
RFB
Feedback Pin. Op-amp feedback resistor. Always connect to VOUT.
22
ROFS
Offset Resistor Pin. Connect to VOUT for G = 1, to AGND for G = 2, or to REFIN for bipolar output.
23
VDD
Positive Power Supply (+5V)
24
D6/S0
D6 input when A0 = A1 = 1, or S0 input when A0 = 0 and A1 = 1. Always set S0 to 0.*
* This applies to 4 + 4 + 4 input loading mode. See Table 2 for 8 + 4 input loading mode.
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