High Voltage, Precision

Operational Amplifier

Data Sheet

ADA4700-1

FEATURES

Low input offset voltage: 0.2 mV typical

High output current drive: 30 mA

Wide range of operating voltage: ±5 V to ±50 V

High slew rate: 20 V/µs typical

High gain bandwidth product: 3.5 MHz typical

Thermal regulation at junction temperature >145°C

Ambient temperature range: −40°C to +85°C

Low input bias current ≤ 15 nA typical

APPLICATIONS

Automated and bench top test equipment

High voltage regulators and power amplifiers

Data acquisition and signal conditioning

Piezo drivers and predrivers

General-purpose current sensing

PIN CONFIGURATION

Figure 1.

GENERAL DESCRIPTION

The ADA4700-1 is a high voltage, precision, single-channel

operational amplifier with a wide operating voltage range (±5 V

to ±50 V) and relatively high output current drive. Its advanced

design combines low power (170 mW for a ±50 V supply), high

bandwidth (3.5 MHz), and a high slew rate with unity-gain stability

and phase inversion free performance. The ability to swing near

rail to rail at the output enables designers to maximize signal-

to-noise ratios (SNRs).

The ADA4700-1 is designed for applications requiring both ac and

dc precision performance, making the ADA4700-1 useful in a

wide variety of applications, including high voltage test equipment

and instrumentation, high voltage regulators and power amplifiers,

power supply control and protection, and as an amplifier or buffer

for transducers with wide output ranges. It is particularly well

suited for high intensity LED testing applications where it provides

highly accurate voltage and current feedback as well as a predriver

to provide accurate voltage and/or current sourcing stimulus to

the LED string under test.

The ADA4700-1 is specified over the industrial temperature range

of −40°C to +85°C and includes thermal regulation at a junction

temperature greater than 145°C and an integrated current limit.

The ADA4700-1 is available in a thermally enhanced, 8-lead SOIC

package with an exposed pad.

Figure 2. Slew Rate

NC

–IN

+IN

V–

NC

V+

OUT

NC

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

ADA4700-1

NOTES

1. NC = NO CONNECT. DO NOT

CONNECT TO THIS PIN.

2. CONNECT EXPOSED PAD TO V–

OR LEAVE FLOATING.

50

–50

–40

–30

–20

–10

0

10

20

30

40

5

–5

–4

–3

–2

–1

0

1

2

3

4

0

5

10

15

20

25

30

35

40

TIME (µs)

OUTPUT

INPUT

ADA4700-1

VSY = ±50V

AV = 20V/V

RL = 2kΩ

Rev. 0

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