Products
INA821 low-power, instrumentation amp
Parameters
| Number of channels (#) 1 | 1 |
| Vs (Max) (V) 36 | 36 |
| Vs (Min) (V) 4.5 | 4.5 |
| Input offset (+/-) (Max) (uV) 35 | 35 |
| Gain (Min) (V/V) 1 | 1 |
| Gain (Max) (V/V) 10000 | 10000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) 7 | 7 |
| Features Super-beta, Small Size, Overvoltage Protection | Super-beta, Small Size, Overvoltage Protection |
| CMRR (Min) (dB) | 136 |
| Input offset drift (+/-) (Max) (uV/C) | 0.4 |
| Input bias current (+/-) (Max) (nA) | 0.5 |
| Iq (Typ) (mA) | 0.6 |
| Bandwidth at min gain (Typ) (MHz) | 4.7 |
| Gain error (+/-) (Max) (%) | 0.15 |
| Operating temperature range (C) | ‘-40 to 125 |
| Type | Resistor |
| Output swing headroom (to negative supply) (Typ) (V) | 0.15 |
| Output swing headroom (to positive supply) (Typ) (V) | -0.15 |
| Input common mode headroom (to negative supply) (Typ) (V) | 2 |
| Input common mode headroom (to positive supply) (Typ) (V) | -2 |
| Noise at 0.1 Hz-10 Hz (Typ) (uVpp) | 0.14 |
| Gain non-linearity (+/-) (Max) (%) | 0.0015 |
Features
Low offset voltage: 10 µV (typ), 35 µV (max)
Gain drift: 5 ppm/°C (G = 1),
35 ppm/°C (G > 1) (max)
Noise: 7 nV/√Hz
Bandwidth: 4.7 MHz (G = 1), 290 kHz (G = 100)
Stable with 1-nF capacitive loads
Inputs protected up to ±40 V
Common-mode rejection: 112 dB, G = 10 (min)
Power supply rejection: 110 dB, G = 1 (min)
Supply current: 650 µA (max)
Supply range:
Single-supply: 4.5 V to 36 V
Dual-supply: ±2.25 V to ±18 V
Specified temperature range: –40°C to +125°C
Packages: 8-pin SOIC, VSSOP, and WSON
Description
The INA821 is a high-precision instrumentation amplifier that offers low power consumption and operates over a wide single-supply or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device has high precision as a result of super-beta input transistors, which provide low input offset voltage, offset voltage drift, input bias current, and input voltage and current noise. Additional circuitry protects the inputs against overvoltage up to ±40 V.
The INA821 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 92 dB across the full input common-mode range. The device is designed for low-voltage operation from a 4.5-V single supply, and dual supplies up to ±18 V.
The INA821 is available in 8-pin SOIC, VSSOP, and WSON packages, and is specified over the –40°C to +125°C temperature range.
1. Who are the staff in your R & D department? What are your qualifications?
-R & D Director: formulate the company’s long-term R & D plan and grasp the direction of research and development; Guide and supervise r&d department to implement company r&d strategy and annual R&D plan; Control the progress of product development and adjust the plan; Set up excellent product research and development team, audit and training related technical personnel.
R & D Manager: make new product R & D plan and demonstrate the feasibility of the plan; Supervise and manage the progress and quality of r&d work; Research new product development and propose effective solutions according to customer requirements in different fields
R&d staff: collect and sort out key data; Computer programming; Conducting experiments, tests and analyses; Prepare materials and equipment for experiments, tests and analyses; Record measurement data, make calculations and prepare charts; Conduct statistical surveys
2. What is your product research and development idea?
- Product conception and selection product concept and evaluation product definition and project plan design and development product testing and validation launch to market
