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參數(shù)資料
| 型號(hào)： | MAX550BC |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Power, +2.5V to +5.5V, 8-Bit Voltage-Output DAC in レMAX |
| 中文描述： | 低功耗，2.5V至5.5V，8位電壓輸出DAC最大的レ |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 112K |
| 代理商： | MAX550BC |
_______________Detailed Desc ription
Analog S ec tion
The MAX550B is an 8-bit, voltage-output digital-to-ana-
log converter (DAC). The DAC consists of an R-2R lad-
der network that converts 8-bit digital inputs into
equivalent analog output voltages in proportion to the
applied reference voltage (Figure 1). The MAX550B’s
output is unbuffered and has a typical output resis-
tance of 32k
. The power-supply range is from +2.5V
to +5.5V.
Reference Input
The voltage applied at REF sets the full-scale output for
the DAC and may range from 2.5V to V
DD_
. The REF
input resistance is code-dependent, with the lowest
value (typically 32k
) occurring when the DAC register
is loaded with a code of 01010101 (55 hex). To mini-
mize INL errors, the reference voltage source should
have less than 6
output impedance.
M
Low-Power, +2.5V to +5.5V, 8-Bit
Voltage-Output DAC in μMAX
6
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
PIN
1
2
NAME
GND
OUT
FUNCTION
Ground
DAC Output Voltage
3
CS
Chip-Select Input. A logic low on
CS
enables serial data to be clocked into the input shift
register. Programming commands are executed at
CS
’s rising edge.
4
5
6
7
8
DIN
SCLK
V
DD2
REF
V
DD1
Serial Data Input. Data is clocked into the 16-bit input shift register on SCLK’s rising edge.
Serial Clock Input. Data is clocked in on SCLK’s rising edge.
Connect to V
DD1
External Reference Voltage Input for DAC (2.5V to V
DD_
)
Positive Power Supply (+2.5V to +5.5V)
2R
R
R
R
R
2R
2R
2R
2R
REF
GND
DAC REGISTER
OUT
MSB
LSB
GND
2R
R
R
R
2R
2R
2R
Figure 1. DAC Simplified Circuit Diagram
NOTE: SWITCH POSITIONS SHOWN FOR DAC CODE FF HEX.
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