Data Sheet
FEATURES
Fully differential
Extremely low power with power-down feature
2.6 mA quiescent supply current @ 5 V
450 µA in power-down mode @ 5 V
High speed
110 MHz large signal 3 dB bandwidth @ G = 1
450 V/µs slew rate
12-bit SFDR performance @ 500 kHz
Fast settling time: 100 ns to 0.02%
Low input offset voltage: ±2.6 mV max
Low input offset current: 0.45 µA max
Differential input and output
Differential-to-differential or single-ended-to-differential
operation
Rail-to-rail output
Adjustable output common-mode voltage
Externally adjustable gain
Wide supply voltage range: 2.7 V to 12 V
Available in small SOIC package
Qualified for automotive applications
Low Cost, Low Power,
Differential ADC Driver
FUNCTIONAL BLOCK DIAGRAM
AD8137
–IN
1
V
OCM 2
V
S+ 3
+OUT
4
8
7
6
5
+IN
PD
04771-0-001
V
S–
–OUT
Figure 1.
3
2
G=1
NORMALIZED CLOSED-LOOP GAIN (dB)
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
R
G
= 1kΩ
V
O, dm
= 0.1V p-p
–11
–12
0.1
1
04771-0-002
G=5
G=2
G = 10
APPLICATIONS
ADC drivers
Automotive vision and safety systems
Automotive infotainment systems
Portable instrumentation
Battery-powered applications
Single-ended-to-differential converters
Differential active filters
Video amplifiers
Level shifters
10
FREQUENCY (MHz)
100
1000
Figure 2. Small Signal Response for Various Gains
GENERAL DESCRIPTON
The
is a low cost differential driver with a rail-to-rail
output that is ideal for driving ADCs in systems that are sensitive
to power and cost. The
is easy to apply, and its internal
common-mode feedback architecture allows its output common-
mode voltage to be controlled by the voltage applied to one pin.
The internal feedback loop also provides inherently balanced
outputs as well as suppression of even-order harmonic distortion
products. Fully differential and single-ended-to-differential gain
configurations are easily realized by the
External
feedback networks consisting of four resistors determine the
closed-loop gain of the amplifier. The power-down feature is
beneficial in critical low power applications.
The
is manufactured on Analog Devices, Inc.,
proprietary second-generation XFCB process, enabling it to
achieve high levels of performance with very low power
consumption.
The
is available in the small 8-lead SOIC package and
3 mm × 3 mm LFCSP package. It is rated to operate over the
extended industrial temperature range of −40°C to +125°C.
Rev. E
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.
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