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OPA859QDSGRQ1

Automotive 1.8-GHz unity-gain bandwidth, 3.3-nV/√Hz, FET input amplifier

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

OPA859QDSGRQ1
Datasheet:

OPA859QDSGRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
Amplifier Type:

J-FET
Number of Circuits:

1
Output Type:

Differential
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OPA859QDSGRQ1 General Description

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.

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.

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.

Key Features

AEC-Q100 Qualified for Automotive Applications:
- Temperature grade 1: –40°C to +125°C, T_A
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
- Includes Negative Supply
2.5 V_PP 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

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	Automotive, AEC-Q100
Amplifier Type	J-FET	Number of Circuits	1
Output Type	Differential	Slew Rate	1150V/µs
Gain Bandwidth Product	900 MHz	-3db Bandwidth	1.8 GHz
Current - Input Bias	0.5 pA	Voltage - Input Offset	900 mV
Current - Supply	21mA	Current - Output / Channel	105 mA
Voltage - Supply Span (Min)	3.3 V	Voltage - Supply Span (Max)	5.25 V
Operating Temperature	-40°C ~ 125°C (TA)	Mounting Type	Surface Mount