Datasheet

OPA2684
7
SBOS239D
www.ti.com
TYPICAL CHARACTERISTICS: V
S
= ±5V (Cont.)
At T
A
= +25°C, G = +2, R
F
= 800Ω, and R
L
= 100Ω, unless otherwise noted.
100
10
1
Frequency (Hz)
100 10M1k 10k 100k 1M
INPUT VOLTAGE AND CURRENT NOISE DENSITY
Voltage Noise (nV/√Hz)
Current Noise (pA/√Hz)
Noninverting Current Noise
9.4pA/√Hz
Voltage Noise
3.7nV/√Hz
Inverting Current Noise
17pA/√Hz
2-TONE, 3RD-ORDER
INTERMODULATION DISTORTION
–8 –7 –6 –5 –4 –3 –2 –1453210678
Power at Load (P
O
each tone, dBm)
3rd-Order Spurious Level (dBc)
–50
–60
–70
–80
–90
50Ω
+5V
–5V
50Ω
50Ω
P
I
P
O
800Ω
800Ω
OPA2684
20MHz
10MHz
5MHz
1MHz
50
40
30
20
10
0
C
LOAD
(pF)
1 10010
R
S
vs C
LOAD
R
S
(Ω)
0.5dB Peaking
9
6
3
0
–3
–6
Frequency (MHz)
1 30010 100
SMALL-SIGNAL BANDWIDTH vs C
LOAD
Normalized Gain (dB)
5pF
800Ω
1kΩ
OPA2684
R
S
V
O
+5V
–5V
50Ω
C
L
800Ω
V
I
12pF
100pF
50pF
75pF
20pF
33pF
1kΩ is
Optional
CMRR and PSRR vs FREQUENCY
10
2
10
3
10
4
10
5
10
6
10
7
10
8
Frequency (Hz)
Power-Supply Rejection Ratio (dB)
Common-Mode Rejection Ratio (dB)
70
60
50
40
30
20
10
0
CMRR
+PSRR
–PSRR
OPEN-LOOP TRANSIMPEDANCE GAIN AND PHASE
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
Frequency (Hz)
Open-Loop Transimpedance Gain (dBΩ)
120
100
80
60
40
20
0
Open-Loop Phase (°)
0
–30
–60
–90
–120
–150
–180
20log (Z
OL
)
∠ Z
OL