High Speed Amplifiers (BW > 50 MHz)
Differential Amplifiers
ADA4930-1/ADA4930-2: Low Power, Ultralow Noise Differential ADC Driver for Low Voltage ADCs
The ADA4930-1 and ADA4930-2 are very low noise, low distortion, high speed differential amplifiers, ideal for driving 1.8 V high performance ADCs with
resolutions up to 14 bits from dc to 70 MHz. The devices feature a low 0.9 V output common-mode voltage on single supply, capable of driving dc-coupled,
1.8 V ADCs all the way to ground.
Features
•ꢀLow input voltage noise: 1.2 nV/√Hz
100
•ꢀLow common-mode output: 0.9 V on single supply
•ꢀExtremely low harmonic distortion
•ꢀ −104 dBc HD2 at 10 MHz
10
•ꢀ −79 dBc HD2 at 70 MHz
•ꢀ −73 dBc HD2 at 100 MHz
•ꢀHigh speed
•ꢀ −3 dB bandwidth of 1.35 GHz, G = 1
1
•ꢀ Slew rate: 3400 V/µs, 25% to 75%
•ꢀ 0.1 dB gain flatness to 380 MHz
•ꢀ0.5 mV typical offset voltage
0
•ꢀExternally adjustable gain
10
100
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
•ꢀSingle-supply operation: 3.3 V or 5 V
Applications
Voltage noise spectral density.
•ꢀADC drivers
•ꢀSingle-ended-to-differential converters
•ꢀIF and baseband gain blocks
•ꢀDifferential buffers
•ꢀLine drivers
Differential Amplifiers
Distortion
Supply
Voltage
(V)
BW @ Slew
Price
@ 1k
(OEM $US)
SFDR1 @ BW
Part
Number
No. of
Amps
ACL
Min
Noise
(nV/ z)
VOS Max
IB
IS/Amp
IOUT
Temp
Disable
Rail-to-Rail1
A
CL Min Rate
Packaging
√
H
(mV) (µA Max) (mA Typ) (mA) Range2
(MHz) (V/ms)
(dBc) (MHz)
ADA4927-1
ADA4927-2
1
2
•
•
3.79
6.29
5,
3 to 5.25
3, 5,
3, 5
5,
3, 5
5
1
1
1
1
1
2
1
1
2300 5000
1350 3400
–91
–88
–90
–84
82
70
30
20
70
50
100
1
1.4
1.15
3.6
2.2
2.6
2.3
3.9
1.3
3.1
2.2
2.5
1
15
24
5.2
30
18
26
1
20 mA
34
65
30
H
LFCSP
LFCSP
LFCSP
LFCSP
LFCSP
LFCSP
ADA4930-1
ADA4930-2
1
2
•
•
3.79
6.29
ADA4932-1
ADA4932-2
1
2
•
•
2.95
5.29
5
560
2800
9.6
80
H
I
ADA4937-1
ADA4937-2
1
2
•
•
3.79
5.69
1900 6000
1000 4700
1400 6800
39.5
37
100
75
ADA4938-1
ADA4938-2
1
2
•
•
3.79
5.69
5
I
ADA4939-1
ADA4939-2
1
2
•
•
3.79
5.69
–77
103
–98
3.4
0.25
2.5
36.5
1.25
9.5
100
45
H
H
H
ADA4940-1
ADA4940-2
1
2
•
•
SOIC/LFCSP
LFCSP
1.89
2.89
3, 5, 65
3, 5
RRO
RRO
230
750
90
ADA4950-1
ADA4950-2
1
2
•
•
2.99
5.29
2900
20
9.2 RTO
N/A
114
LFCSP
3, 5, 65
AD8139
1
1
1
1
1
1
1
1
3, 5, 65
3, 5, 65
3, 5, 65
3, 5, 65
3, 5, 65
5, 65, 612
3, 5, 65
5
1
2
1
1
1
2
2
2
410
800
2000
1200
1150
450
–85
–68
–83
–85
–90
–99
5
5
2.25
25
0.5
7
8
6
24.5
11.5
12
100
60
H5
SOIC/LFCSP
SOIC/MSOP
SOIC/MSOP
SOIC/MSOP
SOIC/LFCSP
SOIC/LFCSP
SOIC/LFCSP
LFCSP
3.75
1.82
1.67
3.75
1.10
3.63
2.42
6.95
AD8131
400
H
AD8132
350
5
8
3.5
2.5
2.6
1.1
0.8
20
7
70
H5
AD8138
320
20
0.5
0.1
0.1
5
7
20
95
I
AD8137
•
•
•
•
RRO
RRO
110
8.25
12 RTO
10.2 RTO
4.8
1
3.2
9.4
2.3
60
20
H5
ADA4922-1
ADA4941-1
ADA4960-1
38
260
3.5
3
40
I
I
I
31
24.5 –110
25
5000 8700
–73 1000
20
17.5
1 RRIO: rail-to-rail input/output, RRO: rail-to-rail output, SS: single supply (IVR includes –VSY).
2
Temp range: H = extended industrial (–40°C to +125°C), I = industrial (–40°C to +85°C).
RTO: Referred to output.
Operational Amplifier Selection Guide
36
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ADI [ ADI ]
