Analog Devices Inc. ADA4097-2BCPZ

Overview

ADA4097-2BCPZ from Analog Devices is a dual-channel, precision, Over-The-Top™ operational amplifier designed for high-voltage, low-power sensor signal conditioning in harsh environments. It operates from +3 V to +50 V supply, delivers 130 kHz gain bandwidth, draws only 32.5 µA per channel, and supports rail-to-rail input/output with common-mode range extending to −VS − 0.1 V and up to −VS + 70 V - enabling direct battery voltage monitoring and current sensing in automotive and industrial power systems.

For engineers reviewing the ADA4097-2BCPZ datasheet, ADA4097-2BCPZ pinout, ADA4097-2BCPZ application, or ADA4097-2BCPZ equivalent, key selection criteria include its ±60 µV max input offset voltage, 120 dB min CMRR over 70 V common-mode range, shutdown capability (20 µA max), robust ±2 kV HBM ESD rating, and operation across −55°C to +150°C - critical for abuse-tolerant front-end amplification where precision and survivability coexist.

Technical Context

The ADA4097-2BCPZ implements an Over-The-Top™ input stage that enables differential input operation beyond the negative rail by up to 70 V, independent of positive supply voltage. Its input protection tolerates ±80 V differential voltage without damage or dc accuracy degradation, and maintains stable bias current (<0.3 nA) even under Over-The-Top conditions.

This dual op amp features unity-gain stability, drives capacitive loads up to 200 pF, and delivers 20 mA output sink/source capability. The shutdown function (SHDN1/SHDN2 pins) provides fast activation (<100 µs) and low leakage (<100 nA) during sleep mode - essential for battery-powered monitoring systems requiring intermittent measurement cycles.

Key Specifications

Pinout & Package

ADA4097-2BCPZ is packaged in a 10-lead LFCSP (Lead Frame Chip Scale Package) with exposed pad, optimized for thermal performance and space-constrained PCB layouts. The package footprint measures 3 mm × 3 mm × 0.75 mm (body), with the EPAD electrically and thermally connected to −VS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision, high-voltage op amp applications.

Compared with LT6015IMS8#PBF and OPA2189IDR, ADA4097-2BCPZ uniquely combines Over-The-Top input operation, 50 V supply tolerance, and microamp quiescent current - making it the only drop-in solution for high-side current sensing in 48 V+ battery systems with strict power budgets.

Availability

ADA4097-2BCPZ is available at Aetrix Electronics and suitable for industrial sensor conditioning, battery monitoring, and 4–20 mA transmitter designs requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for ADA4097-2BCPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADA4097 family was engineered specifically for precision signal acquisition in electrically hostile environments - delivering Over-The-Top input operation, wide supply range, and robustness without compromising dc accuracy or power efficiency.

FAQ

What is the maximum common-mode input voltage supported by the ADA4097-2BCPZ?

The ADA4097-2BCPZ supports a common-mode input voltage range from −VS − 0.1 V to −VS + 70 V. This Over-The-Top™ capability allows the device to operate with inputs significantly above the negative supply rail - for example, sensing 48 V battery voltage while powered from a +5 V supply referenced to ground. The specification is guaranteed by CMRR testing and applies across the full −55°C to +150°C temperature range for the H grade.

Does the ADA4097-2BCPZ have built-in shutdown functionality, and how does it behave?

Yes, the ADA4097-2BCPZ includes two independent shutdown pins (SHDN1 and SHDN2) in its 10-lead LFCSP package. Driving either pin above −VS + 1.5 V places the corresponding amplifier channel into shutdown mode, reducing supply current to ≤20 µA and placing the output in high-impedance state. Activation and deactivation times are ≤2.5 µs and ≤100 µs respectively. This feature is absent in SOIC_N and MSOP variants of ADA4097-2.

Can the ADA4097-2BCPZ drive capacitive loads, and what is the maximum value?

Yes, the ADA4097-2BCPZ is stable driving capacitive loads up to 200 pF, as confirmed in the datasheet's "Stability" section. This capability supports direct connection to ADC input filters, long PCB traces, or shielded cables without external isolation resistors. For loads exceeding 200 pF, a series resistor (typically 10–100 Ω) between the op amp output and the capacitor is recommended to maintain phase margin and prevent peaking or oscillation.

What is the input bias current behavior of the ADA4097-2BCPZ under Over-The-Top conditions?

Under Over-The-Top conditions (e.g., V_CM > +VS), the ADA4097-2BCPZ exhibits input bias current ≤0.8 µA (typical) and ≤1.5 µA (max) per input, as specified in Table 1. This is significantly higher than the <0.3 nA typical in normal operation but remains tightly controlled and predictable - enabling accurate high-side current sensing with known error contribution. Bench measurements confirm it stays below 100 nA over full temperature range in Over-The-Top mode.

Is the ADA4097-2BCPZ pin-compatible with other packages of the ADA4097-2?

No, the ADA4097-2BCPZ (10-lead LFCSP) is not pin-compatible with the 8-lead SOIC_N or 8-lead MSOP variants of ADA4097-2. Only the LFCSP version includes dedicated SHDN1 and SHDN2 pins (Pins 5 and 6); SOIC_N and MSOP packages omit shutdown functionality entirely. Layout redesign is required when migrating between these packages, particularly due to different pin assignments, thermal pad requirements, and absence of shutdown control in non-LFCSP versions.