OPA858 5.5GHz Gain Bandwidth Product, Gain of 7V/V Stable, FET Input Amplifier

1 Features

• High gain bandwidth product: 5.5GHz

• Decompensated, gain ≥ 7V/V (stable)

• Ultra-low bias current MOSFET inputs: 10pA

• Low input voltage noise: 2.5nV/√Hz

• Slew rate: 2000V/µs

• Low Input capacitance:

– Common-mode: 0.6pF

– Differential: 0.2pF

• Wide input common-mode range:

– 1.4V from positive supply

– Includes negative supply

• 2.5VPP output swing in TIA configuration

• Supply voltage range: 3.3V to 5.25V

• Quiescent current: 20.5mA

• Package: 8-pin WSON

• Temperature range: –40°C to +125°C

2 Applications

• Optical time domain reflectometry (OTDR)

• 3D scanner

• Laser distance measurement

• Solid-state scanning LIDAR

• Optical ToF position sensor

• Drone vision

• Industrial robot LIDAR

• Vacuum robot LIDAR

• Silicon photomultiplier (SiPM) buffer amplifier

• Photomultiplier tube post amplifier

+

±

VBIAS

CF

RF

3.5 V

5 V

+

±

VREF

TDC7201

(Time-to-

Digital

Converter)

Pulsed Laser

Diode

Rx

Lens

+

±

VBIAS

CF

RF

3.5 V

5 V

+

±

VREF

Tx

Lens

MSP430

Controller

Start 1

Stop 1

Start 2

Stop 2

OPA858

OPA858

TLV3501

TLV3501

High-Speed Time-of-Flight Receiver

3 Description

The OPA858 is a wideband, low-noise operational

amplifier

with

CMOS

inputs

for

wideband

transimpedance and voltage amplifier applications.

When the device is configured as a transimpedance

amplifier (TIA), the 5.5GHz gain bandwidth product

(GBWP) enables high closed-loop bandwidths at

transimpedance gains in the range of tens to

hundreds of kilohms.

The following graph shows the bandwidth and

noise performance of the OPA858 as a function of

the photodiode capacitance when the amplifier is

configured as a TIA. The total noise is calculated

along a bandwidth range extending from dc to the

calculated frequency (f) on the left scale. The OPA858

package has a feedback pin (FB) that simplifies the

feedback network connection between the input and

the output.

The OPA858 is optimized to operate in optical time-of-

flight (ToF) systems where the OPA858 is used with

time-to-digital converters, such as the TDC7201. Use

the OPA858 to drive a high-speed analog-to-digital

converter (ADC) in high-resolution LIDAR systems

with a differential output amplifier, such as the

THS4541 or LMH5401 devices.

Package Information

PART NUMBER(1)

PACKAGE(2)

PACKAGE SIZE(3)

OPA858

DSG (WSON, 8) 2.00mm × 2.00mm

Bare die

0.751mm × 0.705mm

(1)

See the Device Comparison Table.

(2)

For more information, see Section 12.

(3)

The package size (length × width) is a nominal value and

includes pins, where applicable.

Photodiode capacitance (pF)

0

2

4

6

8

10

12

14

16

18

20

0

20

50

30

100

40

150

50

200

60

250

70

300

80

350

90

400

100

450

110

D209

f-3dB, RF = 10 k:

f-3dB, RF = 20 k:

IRN, RF = 10 k:

IRN, RF = 20 k:

Photodiode Capacitance vs Bandwidth and Noise

OPA858

SBOS629B – APRIL 2018 – REVISED MAY 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.