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PDF ADA4870 Data sheet ( Hoja de datos )
| Número de pieza | ADA4870 | |
| Descripción | 1A Output Drive Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
Ideal for driving high capacitive or low resistive loads
Wide supply range: 10 V to 40 V
High output current drive: 1 A
Wide output voltage swing: 37 V swing with 40 V supply
High slew rate: 2500 V/µs
High bandwidth: 52 MHz large signal, 70 MHz small signal
Low noise: 2.1 nV/√Hz
Quiescent current: 32.5 mA
Power down: 0.75 mA
Short-circuit protection and flag
Current limit: 1.2 A
Thermal protection
APPLICATIONS
Envelope tracking
Power FET driver
Ultrasound
Piezo drivers
PIN diode drivers
Waveform generation
Automated test equipment (ATE)
CCD panel drivers
Composite amplifiers
GENERAL DESCRIPTION
The ADA4870 is a unity gain stable, high speed current
feedback amplifier capable of delivering 1 A of output current
and 2500 V/μs slew rate from a 40 V supply. Manufactured
using the Analog Devices, Inc., proprietary high voltage extra
fast complementary bipolar (XFCB) process, the innovative
architecture of the ADA4870 enables high output power, high
speed signal processing solutions in applications that require
driving a low impedance load.
The ADA4870 is ideal for driving high voltage power FETs,
piezo transducers, PIN diodes, CCD panels, and a variety of
other demanding applications that require high speed from
high supply voltage at high output current.
The ADA4870 is available in a power SOIC package (PSOP_3),
featuring an exposed thermal slug that provides high thermal
conductivity, enabling efficient heat transfer for improved perfor-
mance and reliability in demanding applications. The ADA4870
operates over the industrial temperature range (−40°C to +85°C).
High Speed, High Voltage,
1 A Output Drive Amplifier
ADA4870
FUNCTIONAL BLOCK DIAGRAM
VCC 1
TFL 2
SD 3
ON 4
NC 5
INP 6
INN 7
OUT 8
NC 9
VEE 10
ADA4870
Figure 1.
20 VCC
19 VCC
18 VCC
17 OUT
16 OUT
15 OUT
14 OUT
13 VEE
12 VEE
11 VEE
4,000
3,000
VOUT
20
15
2,000
10
1,000
0
SLEW RATE
5
0
–1,000
–5
–2,000
–10
–3,000
–15
–4,000
TIME (45ns/DIV)
–20
Figure 2. Slew Rate, VS = ±20 V, VOUT = 30 V p-p, AV = +2,
RF = 1.5 kΩ, CL = 300 pF, RS = 5 Ω
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
Parameter
OUTPUT CHARACTERISTICS
Output Voltage Range
Output Current Drive
Short-Circuit Protection Current Limit
POWER SUPPLY
Operating Range
Quiescent Current
Positive Power Supply Rejection Ratio
Negative Power Supply Rejection Ratio
Test Conditions/Comments
RG = 1.2 kΩ, RL = open
ON = floating
SD = VEE + 5 V, ON = VEE
SD = VEE, ON = not applicable
SD = VEE + 5 V, ON = VEE + 5 V
Min Typ
±3.7
1
1.2
10
28
0.65
4.7
66 68
61 63
ADA4870
Max Unit
V
A
A
40 V
30 mA
1 mA
5.5 mA
dB
dB
Rev. 0 | Page 5 of 24
5 Page 
Data Sheet
2.0
–20°C
+25°C
1.5 +100°C
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
VS = ±5V
RF = 1.21kΩ
AV = –2
CL = 300pF
RS = 5Ω
TIME (25ns/DIV)
Figure 22. Small Signal Pulse Response vs. Case Temperature, AV = −2,
VS = ±5 V, VOUT = 2 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
2.0
–20°C
+25°C
1.5 +100°C
1.0
0.5
0
–0.5
–1.0
VS = ±5V
RF = 1.21kΩ
–1.5 AV = –5
CL = 300pF
RS = 5Ω
–2.0
TIME (25ns/DIV)
Figure 23. Small Signal Pulse Response vs. Case Temperature, AV = −5,
VS = ±5 V, VOUT = 2 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
2.0
–20°C
+25°C
1.5 +100°C
1.0
0.5
0
–0.5
–1.0
VS = ±5V
RF = 1.21kΩ
–1.5 AV = –10
CL = 300pF
RS = 5Ω
–2.0
TIME (25ns/DIV)
Figure 24. Small Signal Pulse Response vs. Case Temperature, AV = −10,
VS = ±5 V, VOUT = 2 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
ADA4870
15
–20°C
+25°C
+100°C
10
5
0
–5
VS = ±20V
–10 RF = 1.21kΩ
AV = –2
CL = 300pF
–15 RS = 5Ω
TIME (25ns/DIV)
Figure 25. Large Signal Pulse Response vs. Case Temperature, AV = −2,
VS = ±20 V, VOUT = 20 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
15
–20°C
+25°C
+100°C
10
5
0
–5
VS = ±20V
–10 RF = 1.21kΩ
AV = –5
CL = 300pF
RS = 5Ω
–15
TIME (25ns/DIV)
Figure 26. Large Signal Pulse Response vs. Case Temperature, AV = −5,
VS = ±20 V, VOUT = 20 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
15
–20°C
+25°C
+100°C
10
5
0
–5
–10
VS = ±20V
RF = 1.21kΩ
AV = –10
CL = 300pF
–15 RS = 5Ω
TIME (25ns/DIV)
Figure 27. Large Signal Pulse Response vs. Case Temperature, AV = −10,
VS = ±20 V, VOUT = 20 V p-p, RF = 1.21 kΩ, CL = 300 pF, RS = 5 Ω
Rev. 0 | Page 11 of 24
11 Page | ||
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| PDF Descargar | [ Datasheet ADA4870.PDF ] | |
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