OP470GS Analog Devices Inc, OP470GS Datasheet - Page 13

• Manufacturer Part Number: OP470GS
• Description: Operational Amplifier (Op-Amp) IC
• Manufacturer: Analog Devices Inc
• Type: General Purpose Amplifierr

Specifications of OP470GS

• No. Of Amplifiers: 4
• Bandwidth: 6MHz
• Slew Rate: 2V/µs
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +85°C
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Rohs Status: RoHS non-compliant
• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Gain Bandwidth Product: 6MHz
• Current - Input Bias: 25nA
• Voltage - Input Offset: 400µV
• Current - Supply: 9mA
• Voltage - Supply, Single/dual (±): 9 V ~ 36 V, ±4.5 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Rail/rail I/o Type: No
• Number Of Elements: 4
• Unity Gain Bandwidth Product: 6MHz
• Common Mode Rejection Ratio: 100dB
• Input Offset Voltage: 1mV
• Input Bias Current: 60nA
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): ±5/±9/±12/±15V
• Voltage Gain In Db: 124.61dB
• Power Supply Rejection Ratio: 120dB
• Power Supply Requirement: Dual
• Shut Down Feature: No
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): ±4.5V
• Dual Supply Voltage (max): ±18V
• Technology: Bipolar
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Package Type: SOIC W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Output Type: -
• Current - Output / Channel: -
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Not Compliant

Figure 14. Noise Density of Low Noise Amplifier, G = 1000
DIGITAL PANNING CONTROL
Figure 15 uses a DAC-8408, quad 8-bit DAC to pan a signal
between two channels. The complementary DAC current out-
puts two of the DAC-8408’s four DACs drive current-to-voltage
converters built from a single quad OP470. The amplifiers have
complementary outputs with the amplitudes dependent upon
the digital code applied to the DAC. Figure 16 shows the comple-
mentary outputs for a 1 kHz input signal and digital ramp applied
to the DAC data inputs. Distortion of the digital panning con-
trol is less than 0.01%.
REV. B
100
0%
90
10
SIDE A IN
SIDE B IN
PINS 9 (LSB) – 16 (MSB)
5V
DAC SELECT
DAC DATA BUS
1k
1k
Figure 15. Digital Panning Control Circuit
DAC-8408GP
V
V
A/B
R/W
DS1
DS2
REF
REF
A
C
DGND
DAC A
DAC B
DAC C
DAC D
V
5V
DD
–13–
I
I
OUT2A/2B
OUT2C/2D
I
OUT1A
I
I
I
R
R
R
R
OUT1B
OUT1C
OUT1D
Gain error due to the mismatching between the internal DAC
ladder resistors and the current-to-voltage feedback resistors is
eliminated by using feedback resistors internal to the DAC. Of
the four DACs available in the DAC-8408, only two DACs, A
and C, actually pass a signal. DACs B and D are used to pro-
vide the additional feedback resistors needed in the circuit. If
the VREFB and VREFD inputs remain unconnected, the
current-to-voltage converters using RFBB and RFBD are unaf-
fected by digital data reaching DACs B and D.
FB
FB
FB
FB
A
B
C
D
A OUT
A OUT
Figure 16. Digital Panning Control Output
20pF
20pF
20pF
20pF
100
0%
90
10
1/4
OP470E
1/4
OP470E
1/4
OP470E
1/4
OP470E
5V
+15V
–15V
5V
A OUT
A OUT
B OUT
B OUT
1ms
OP470