OP490GSZ-REEL Analog Devices Inc, OP490GSZ-REEL Datasheet - Page 11

• Manufacturer Part Number: OP490GSZ-REEL
• Description: IC,Operational Amplifier,QUAD,BIPOLAR,SOP,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of OP490GSZ-REEL

• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Slew Rate: 0.012 V/µs
• Gain Bandwidth Product: 20kHz
• Current - Input Bias: 4.2nA
• Voltage - Input Offset: 600µV
• Current - Supply: 60µA
• Voltage - Supply, Single/dual (±): 1.6 V ~ 36 V, ±0.8 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Current - Output / Channel: -
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: OP490GSZ-REELTR

MICROPOWER SINGLE-SUPPLY QUAD VOLTAGE-
OUTPUT 8-BIT DAC
The circuit shown in Figure 23 uses the DAC8408 CMOS quad
8-bit DAC, and the OP490 to form a single-supply quad voltage
output DAC with a supply drain of only 140 μA. The DAC8408
is used in voltage switching mode and each DAC has an output
resistance (≈10 kΩ) independent of the digital input code. The
output amplifiers act as buffers to avoid loading the DACs. The
100 kΩ resistors ensure that the OP490 outputs swing below 0.8 V
when required.
REFERENCE
VOLTAGE
DAC DATA BUS
PIN 9 (LSB) TO PIN 16 (MSB)
1.5V
CONTROL
SIGNALS
DIGITAL
25
24
23
17
18
19
20
4
5
6
R/W
DS1
DS2
A/B
I
I
I
I
I
I
OUT1A
OUT2A/2B
OUT1B
OUT1C
OUT2C/2D
OUT1D
Figure 23. Micropower Single-Supply Quad Voltage Output 8-Bit DAC
DAC8408
DGND
DAC8408
DAC8408
DAC8408
DAC8408
DAC A
DAC B
DAC C
DAC D
28
1/4
1/4
1/4
1/4
Rev. E | Page 11 of 16
V
V
V
V
REF
REF
REF
REF
A
B
C
D
27
21
2
8
10
13
12
2
3
6
5
9
–
+
–
+
–
+
–
+
OP490
OP490
OP490
OP490
1/4
1/4
1/4
1/4
+5V
A
B
C
D
OP490
4
1
11
7
14
8
R1
100kΩ
R2
100kΩ
R3
100kΩ
R4
100kΩ
V
V
V
V
OUT
OUT
OUT
OUT
A
B
C
D
OP490