Renesas DG445DVZ

Overview

DG445DVZ from Intersil is a monolithic quad SPST CMOS analog switch with TTL/CMOS-compatible digital inputs, designed for bidirectional signal routing in precision analog systems. It delivers <85 Ω ON resistance, 250 ns max tON, ±20 V analog signal handling (with ±20 V supplies), and low charge injection (±1 pC) - enabling high-fidelity sample-and-hold and audio switching applications.

For engineers reviewing the DG445DVZ datasheet, DG445DVZ pinout, DG445DVZ application, or DG445DVZ equivalent, key selection criteria include its complementary logic polarity versus DG444, TSSOP-16 RoHS-compliant packaging, split/single-supply operation, and guaranteed performance across –40°C to +85°C industrial temperature range.

Technical Context

The DG445DVZ implements four independent bilateral analog switches using a high-voltage silicon-gate CMOS process with epitaxial isolation to prevent latch-up. Its complementary logic architecture (IN = HIGH → switch ON) differs from DG444, requiring matching control signal polarity in system design.

It supports single-supply (up to 12 V) and dual-supply (±20 V max) operation, with VL pin enabling logic-level translation. Analog signal paths exhibit low rDS(ON) variation over ±5 V input range and maintain <4 pF OFF capacitance per terminal - critical for high-frequency isolation and minimal crosstalk (–100 dB).

Key Specifications

Pinout & Package

Package: 16-lead TSSOP (Pb-free, RoHS compliant, JEDEC MO-153-AB), 4.9 mm × 6.25 mm body, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad SPST analog switch applications.

Compared with DG445DY, DG445DVZ provides identical functionality in a smaller footprint with equivalent thermal resistance (θJA = 150°C/W). Against MAX4617ESE+, DG445DVZ trades lower ON resistance for wider ±20 V operating range and true dual-supply flexibility - making it preferable for industrial and test equipment where signal headroom is critical.

Availability

DG445DVZ is available at Aetrix Electronics and suitable for audio switching, battery-operated systems, and data acquisition applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DG445DVZ 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in high-performance analog and power management ICs.

The DG445 series belongs to Intersil's precision analog switch product line, engineered for low distortion, high isolation, and robust operation in industrial, test, and medical instrumentation where signal fidelity and reliability are non-negotiable.

FAQ

What is the logic polarity of DG445DVZ compared to DG444DVZ?

The DG445DVZ uses active-HIGH logic control: a logic HIGH (≥2.4 V) on INx turns the corresponding switch ON. In contrast, DG444DVZ uses active-LOW logic (HIGH = OFF). This polarity difference means DG445DVZ cannot be substituted for DG444DVZ without inverting the control signals in firmware or hardware. Both share identical analog specifications, pinout, and package.

Can DG445DVZ operate from a single 12 V supply?

Yes, DG445DVZ supports single-supply operation with V+ = 12 V and V− = 0 V. In this configuration, the analog signal range is 0–12 V, rDS(ON) rises to 160 Ω (max), and tON increases to 450 ns (max). The VL pin must still be tied to a stable 3–5 V logic supply to ensure correct input threshold levels. GND remains the logic and analog reference.

What is the maximum allowable voltage between V+ and V− for DG445DVZ?

The absolute maximum voltage between V+ and V− is 44 V. This allows safe operation with ±20 V supplies (40 V total), providing 4 V margin for transients. Exceeding 44 V risks permanent damage. Note that analog signal voltages must stay within the supply rails - e.g., with ±15 V supplies, signals must remain between –15 V and +15 V to avoid clamping or leakage increase.

How does charge injection affect sample-and-hold performance with DG445DVZ?

DG445DVZ specifies ±1 pC typical charge injection, measured with CL = 1 nF and RG = 0 Ω. In a 1 µF hold capacitor, this causes a worst-case voltage step of 1 µV - negligible for 16-bit systems (LSB ≈ 15 µV at 1 V full-scale). For higher resolution or smaller capacitors, the low and tightly specified charge injection simplifies anti-aliasing filter design and eliminates need for correlated double sampling.

Is DG445DVZ pin-compatible with legacy DG212 devices?

Yes, DG445DVZ is a drop-in replacement for DG212-series devices, sharing identical pinout, package footprint (TSSOP-16), and functional block diagram. It improves upon DG212 with lower ON resistance (<85 Ω vs. ~90 Ω), faster switching (250 ns vs. ~350 ns), reduced charge injection, and enhanced latch-up immunity via epitaxial process - all without requiring PCB layout changes.