OPA859-Q1
OPA859-Q1
www.ti.com
SBOSA59 – FEBRUARY 2021
SBOSA59 – FEBRUARY 2021
OPA859-Q1 1.8-GHz Unity-Gain Bandwidth, 3.3-nV/√Hz, FET Input Amplifier
1 Features
3 Description
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AEC-Q100 Qualified for Automotive Applications:
– Temperature grade 1: –40°C to +125°C, TA
High Unity-Gain Bandwidth: 1.8 GHz
Gain Bandwidth Product: 900 MHz
Ultra-Low Bias Current MOSFET Inputs: 10 pA
Low Input Voltage Noise: 3.3 nV/√Hz
Slew Rate: 1150 V/µs
Low Input Capacitance:
– Common-Mode: 0.6 pF
– Differential: 0.2 pF
Wide Input Common-Mode Range:
– 1.4 V from Positive Supply
The OPA859-Q1 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 0.9-GHz gain bandwidth product
(GBWP) enables high closed-loop bandwidths in low-
capacitance photodiode applications.
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The graph below shows the bandwidth and noise
performance of the OPA859-Q1 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
OPA859-Q1 package has a feedback pin (FB) that
simplifies the feedback network connection between
the input and the output.
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– Includes Negative Supply
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2.5 VPP Output Swing in TIA Configuration
Supply Voltage Range: 3.3 V to 5.25 V
Quiescent Current: 20.5 mA
Package: 8-Pin WSON
Temperature Range: –40°C to +125°C
The OPA859-Q1 is optimized to operate in optical
time-of-flight (ToF) systems where the OPA859-Q1 is
used with time-to-digital converters, such as the
TDC7201. Use the OPA859-Q1 to drive a high-speed
analog-to-digital converter (ADC) in high-resolution
LIDAR systems with a differential output amplifier,
such as the THS4541-Q1.
2 Applications
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Automotive LIDAR
Time of flight (ToF) Camera
Optical Time Domain Reflectometry (OTDR)
3D Scanner
Laser Distance Measurement
Solid-State Scanning LIDAR
Optical ToF Position Sensor
Drone Vision
Device Information
PART NUMBER(1)
PACKAGE
BODY SIZE (NOM)
OPA859-Q1
WSON (8)
2.00 mm × 2.00 mm
(1) For all available packages, see the package option
addendum at the end of the data sheet.
Silicon Photomultiplier (SiPM) Buffer Amplifier
Photomultiplier Tube Post Amplifier
CF
225
150
135
120
105
90
f-3dB, RF = 2 kW
200
f-3dB, RF = 5 kW
RF
VBIAS
IRN, RF = 2 kW
IRN, RF = 5 kW
Rx
Lens
175
5 V
TLV3501
+
œ
150
125
100
75
3.5 V
+
OPA859
Stop 2
Start 2
VREF
œ
CF
RF
75
TDC7201
(Time-to-
Digital
VBIAS
60
5 V
Converter)
TLV3501
+
œ
50
45
3.5 V
+
OPA859
Stop 1
Start 1
VREF
œ
25
30
0
15
0
2
4
6
8
10
12
14
Photodiode capacitance (pF)
16
18
20
Tx
Lens
D409
MSP430
ꢀController
Pulsed Laser
Diode
Photodiode Capacitance vs Bandwidth and Noise
High-Speed Time-of-Flight Receiver
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.
Product Folder Links: OPA859-Q1
Copyright © 2021 Texas Instruments Incorporated
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