36 V, 18 MHz, Low Noise, Fast Settling
Single Supply, RRO, JFET Op Amp
Data Sheet
ADA4625-1/ADA4625-2
FEATURES
PIN CONFIGURATION
Wide gain bandwidth product: 18 MHz typical
High slew rate: 48 V/µs typical
ADA4625-1
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
Low voltage noise density: 3.3 nV/√Hz typical at 1 kHz
Low peak-to-peak noise: 0.15 µV p-p, 0.1 Hz to 10 Hz
Low input bias current: 15 pA typical at TA = 25°C
Low offset voltage: 80 µV maximum at TA = 25°C
Offset voltage drift: 1.2 µV/°C maximum at TA = −40°C to 85°C
Fast settling: 0.01% in 700 ns typical
Wide range of operating voltages
OUT
NC
TOP VIEW
(Not to Scale)
NOTES
1. NC = NO CONNECTION. DO NOT CONNECT TO THIS PIN.
2. EXPOSED PAD. CONNECT THE EXPOSED PAD TO GND,
V+ OR V– PLANE, OR LEAVE IT FLOATING.
Figure 1.
Dual-supply operation: 2.5 V to 18 V
Single-supply operation: 5 V to 36 V
Input voltage range includes V−
The ADA4625-1/ADA4625-2 are unity-gain stable, and there is
no phase reversal when input range exceeds either supply rail by
200 mV. The output is capable of driving loads up to 1000 pF
and/or 600 Ω loads.
Rail-to-rail output
High capacitive load drive capability
Output short-circuit current: 46 mA
No phase reversal
The ADA4625-1/ADA4625-2 are specified for operation over
the extended industrial temperature range of −40°C to +125°C
and operates from +5 V to +36 V ( 2.5 V to 18 V) with specifi-
cations at +5 V and 18 V. The devices are available in an 8-lead
SOIC package with an exposed pad (EPAD).
Unity-gain stable
APPLICATIONS
PLL filter amplifiers
100
V
V
= 5V
= ±18V
SY
SY
Transimpedance amplifiers
Photodiode sensor interfaces
Low noise charge amplifiers
GENERAL DESCRIPTION
The ADA4625-1/ADA4625-2 build on Analog Devices, Inc.,
high voltage, single-supply, rail-to-rail output (RRO), precision
junction field effect transistor (JFET) input op amps, taking that
product type to a level of speed and low noise that has not been
made available to the market previously.
10
The ADA4625-1/ADA4625-2 provide optimal performance in
high voltage, high gain, and low noise applications. The input
common-mode voltage range includes the negative supply, and
the output swings rail to rail. This enables the user to maximize
dynamic input range in low voltage, single supply applications
without the need for a separate negative voltage power supply
for ground sense.
1
1
10
100
1k
10k
100k
FREQUENCY (Hz)
Figure 2. Voltage Noise Density vs. Frequency
Table 1. Related Precision JFET Operational Amplifiers
Single
Dual
Quad
Not applicable
AD8510
AD8610
ADA4610-1
ADA4622-1
ADA4627-1/ADA4637-1 Not applicable
AD823A
AD8512
AD8620
ADA4610-2
ADA4622-2
Not applicable
AD8513
Not applicable
ADA4610-4
ADA4622-4
Not applicable
The combination of wide bandwidth, low noise, and low input
bias current makes the ADA4625-1/ADA4625-2 especially
suitable for phase-locked loop (PLL), active filter amplifiers and
for high tuning voltage (VTUNE), voltage controlled oscillators
(VCOs) and preamplifiers where low level signals require an
amplifier that provides both high amplification and wide
bandwidth.
Rev. A
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