DEM-OPA68XU Datasheet, PDF (2/4 Pages) Burr-Brown (TI) – EVALUATION FIXTURE

PART
DESCRIPTION
C₁, C₂
C₃ - C₇
J₁ - J₄
L₁, L₂
P₁
R₁ - R₁₃
Tantalum Chip Capacitor, SMD EIA size 3528, 20V
Multi-Layer Ceramic Chip Cap., SMD 1206, 50V
SMA or SMB Board Jack (Amphenol 901-144-8)
EMI-Suppression Ferrite Chip, SMD 1206
(Steward LI 1206 B 900 R)
Terminal Block, 3.5mm centers
(On-Shore Technology ED555/3DS)
Metal Film Chip Resistor, SMD 1206, 1/8W
TABLE II. Component Descriptions.
R₁ and R₇ set the I/O impedance, R₂ - R₆ set the gain, and C₁
- C₅ are supply bypass capacitors. C₃ is optional; it adds a
bypass between the supplies, which improves distortion
performance for some models. L₁ and L₂ are ferrite chips
that can reduce interactions with the power supply at high
frequencies. If not desired, they can be replaced with 0Ω
resistors. R₈ - R₁₃, C₆ and C₇ are optional components that
support op amps with special functions (see Table I).
For single supply operation, do not connect L₂; otherwise,
the –V_S input to P₁ would be at ground potential.
Standard Current-Feedback Op Amps—These op amps
have the pinout shown in Figure 1. Table III shows typical
values used for these parts. To select component values for
your op amp (especially R₆), consult its data sheet.
DUAL SUPPLY DUAL SUPPLY SINGLE SUPPLY
COMPONENT
(G = +2)
(G = –1)
(G = +1)
R₁
R₂
R₃
R₄
R₅
R₆
R₇
R₈ - R₁₃
C₁
C₂
C₃
C₄
C₅
C₆, C₇
49.9Ω
10.0Ω
Open
Open
402Ω
402Ω
49.9Ω
Open
2.2µF
2.2µF
0.01µF
0.1µF
0.1µF
Open
57.6Ω
Open
10.0Ω
402Ω
Open
402Ω
49.9Ω
Open
2.2µF
2.2µF
0.01µF
0.1µF
0.1µF
Open
49.9Ω
10.0Ω
Open
Open
Open
402Ω
49.9Ω
Open
2.2µF
Open
Open
0Ω
0.1µF
Open
NOTE: The values and gains shown will not work for all current-feedback op
amps. See the data sheet to select proper values. The I/O impedances are 50Ω.
TABLE III. Standard Current-Feedback Op Amps.
Standard Voltage-Feedback Op Amps—These op amps
have the pinout shown in Figure 1. Table IV shows typical
values used for these parts. To select component values for
your op amp, consult its data sheet.
OPA628U and OPA64xU—These op amps have additional
supply pins (see Table I) to improve distortion. Use the
values in Table IV, except for the changes shown in Table
V (the OPA64xP family will function without these changes,
but with reduced distortion performance).
DUAL SUPPLY DUAL SUPPLY SINGLE SUPPLY
COMPONENT
(G = +2)
(G = –1)
(G = +1)
R₁
R₂
R₃
R₄
R₅
R₆
R₇
R₈ - R₁₃
C₁
C₂
C₃
C₄
C₅
C₆, C₇
49.9Ω
178Ω
Open
Open
402Ω
402Ω
49.9Ω
Open
2.2µF
2.2µF
0.01µF
0.1µF
0.1µF
Open
57.6Ω
Open
210Ω
402Ω
Open
402Ω
49.9Ω
Open
2.2µF
2.2µF
0.01µF
0.1µF
0.1µF
Open
49.9Ω
0Ω
Open
Open
Open
24.9Ω
49.9Ω
Open
2.2µF
Open
Open
0Ω
0.1µF
Open
NOTE: The values and gains shown will not work for all voltage-feedback op
amps. See the individual op amp data sheet to select proper values. The I/O
impedances are 50Ω.
TABLE IV. Standard Voltage-Feedback Op Amps.
DUAL SUPPLY DUAL SUPPLY SINGLE SUPPLY
COMPONENT
(G = )+2
(G = –1)
(G = +1)
R₈, R₁₁
C₁
C₂
C₄, C₆
C₅, C₇
0Ω
4.7µF
4.7µF
0.1µF
0.1µF
0Ω
4.7µF
4.7µF
0.1µF
0.1µF
0Ω
4.7µF
Open
0Ω
0.1µF
TABLE V. OPA628U and OPA64xU Changes.
OPA63xU—Pin 8 disables the output when high (OPA632
and OPA635). Table VII shows different ways to set up pin
8’s voltage using R₈, R₉ and C₇. Use Table IV for the other
components, except for the changes shown in Table VI; note
these are all single supply configurations.
COMPONENT
C₄
SINGLE SUPPLY SINGLE SUPPLY SINGLE SUPPLY
(G = +2)
(G = –1)
(G = +1)
0Ω
0Ω
0Ω
TABLE VI. OPA63xU Changes.
CONFIGURATION
External Source
On
Off
R₈
Open
Open
0Ω
C₉
49.9Ω
0Ω
Open
TABLE VII. Disable Pin—OPA632U and OPA635U.
OPA680U—Pin 8 disables the output when low. Table VIII
shows different ways to set up pin 8’s voltage using R₈, R₉
and C₇. Use Table IV for the other components.
CONFIGURATION
External Source
On
Off
R₈
Open
Open
Open
R₉
49.9Ω
Open
0Ω
TABLE VIII. Disable Pin—OPA68xU.
C₇
Open
0.1µF
Open
®
DEM-OPA68xU
2