MAX517BCPA+ Maxim Integrated Products, MAX517BCPA+ Datasheet - Page 13

• Manufacturer Part Number: MAX517BCPA+
• Description: IC DAC 2-WIRE SRL 8BIT R-R 8-DIP
• Manufacturer: Maxim Integrated Products

Specifications of MAX517BCPA+

• Settling Time: 6µs
• Number Of Bits: 8
• Data Interface: I²C, Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 842mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Number Of Dac Outputs: 1
• Resolution: 8 bit
• Interface Type: Serial (I2C)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Maximum Power Dissipation: 727 mW
• Minimum Operating Temperature: 0 C
• Supply Current: 1.5 mA
• Voltage Reference: External
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

age, both DC and AC signals. The voltage at each REF
input sets the full-scale output voltage for its respective
DAC. The reference voltage must be positive. The
DAC’s input impedance is code dependent, with the
lowest value occurring when the input code is 55 hex or
0101 0101, and the maximum value occurring when the
input code is 00 hex. Since the REF input resistance
(RIN) is code dependent, it must be driven by a circuit
with low output impedance (no more than RIN ÷ 2000)
to maintain output linearity. The REF input capacitance
is also code dependent, with the maximum value
occurring at code FF hex (typically 30pF). The output
voltage for any DAC can be represented by a digitally
programmable voltage source as: V
256, where N is the numerical value of the DAC’s binary
input code.
Figure 14. Early STOP Conditions
Table 1. Unipolar Code Table
DAC CONTENTS
11111111
10000001
10000000
01111111
00000001
00000000
(a)
(b)
SDA
SDA
CONDITION
CONDITION
START
START
______________________________________________________________________________________
0
0
1
1
ADDRESS BYTE
ADDRESS BYTE
0
0
AD3
AD3
or
1
or
1
AD2 AD1 AD0 0 0
AD2 AD1 AD0 0 0 0
or
or
1
1
+ V
ANALOG OUTPUT
REF
+ V
+ V
+ V
+ V
REF
REF
REF
REF
OUT
(
———
ACK
ACK
128
256
0V
(
(
(
(
———
———
———
———
= (N x V
0 0
255
129
127
COMMAND BYTE
256
256
256
256
INTERRUPTED
1
)
0
= ——
COMMAND BYTE
2-Wire Serial 8-Bit DACs with
(POWER DOWN)
0
0 1 1
)
)
)
)
V
(RST) (PD)
RST 1
REF
2
REF
(PD)
STOP CONDITION
0
) /
0
X X
EARLY
0
0 0
ACK
The DAC voltage outputs are internally buffered preci-
sion unity-gain followers that slew up to 1V/µs. The out-
puts can swing from 0V to V
to 0V) output transition, the amplifier outputs typically
settle to 1/2LSB in 6µs when loaded with 10kΩ in paral-
lel with 100pF. The buffer amplifiers are stable with any
combination of resistive loads ≥2kΩ and capacitive
loads ≤300pF.
The MAX517/MAX518/MAX519 are designed for unipo-
lar-output, single-quadrant multiplication where the out-
put voltages and the reference inputs are positive with
respect to AGND. Table 1 shows the unipolar code.
Figure 15. DAC Simplified Circuit Diagram
REF_*
GND
(
SHOWN FOR ALL 1s ON DAC
*REF = V
MAX517/MAX518/MAX519's
STATE REMAINS UNCHANGED.
1
INTERRUPTED
OUTPUT BYTE
1 1
DD
2R
Rail-to-Rail Outputs
FOR THE MAX518
0
STOP CONDITION
0
2R
D0
EARLY
R
)
(
2R
D5
MAX517/MAX518/MAX519
POWER DOWN; INPUT LATCH
UNCHANGED IF RST = 0,
DAC OUTPUT(S) RESET IF RST = 1.
R
DD
Output Buffer Amplifiers
. With a 0V to 4V (or 4V
D6
2R
R
2R
2R
D7
)
OUT_
13