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GENERAL DESCRIPTION

The ADN4691E/ADN4693E/ADN4696E/ADN4697E are multipoint, low voltage differential signaling (M-LVDS) transceivers (driver and receiver pairs) that can operate at up to 200 Mbps (100 MHz). The receivers detect the bus state with a differential input of as little as 50 mV over a common-mode voltage range of ?1 V to +3.4 V. ESD protection of up to ±15 kV is implemented on the bus pins. The devices adhere to the TIA/EIA-899 standard for M-LVDS and complement TIA/EIA-644 LVDS devices with additional multipoint capabilities.

The ADN4691E/ADN4693E are Type 1 receivers with 25 mV of hysteresis so that slow-changing signals or loss of input does not lead to output oscillations. The ADN4696E/ADN4697E are Type 2 receivers exhibiting an offset threshold, guaranteeing the output state when the bus is idle (bus-idle fail-safe) or the inputs are open (open-circuit fail-safe).

The devices are available as half-duplex in an 8-lead SOIC package (the ADN4691E/ADN4696E) or as full-duplex in a 14-lead SOIC package (the ADN4693E/ADN4697E). A selection table for the ADN4690E to ADN4697E devices is shown in Table 1.

FEATURES

Multipoint LVDS transceivers (low voltage differential signaling driver and receiver pairs)

Switching rate: 200 Mbps (100 MHz)

Supported bus loads: 30 Ω to 55 Ω

Choice of 2 receiver types

Type 1 (ADN4691E/ADN4693E): hysteresis of 25 mV

Type 2 (ADN4696E/ADN4697E): threshold offset of 100 mV for open-circuit and bus-idle fail-safe

Conforms to TIA/EIA-899 standard for M-LVDS

Glitch free power-up/power-down on M-LVDS bus

Controlled transition times on driver output

Common-mode range: ?1 V to +3.4 V, allowing communication with 2 V of ground noise

Driver outputs high-Z when disabled or powered off

Enhanced ESD protection on bus pins

±15 kV HBM (human body model), air discharge

±8 kV HBM (human body model), contact discharge

±10 kV IEC 61000-4-2, air discharge

±8 kV IEC 61000-4-2, contact discharge

Operating temperature range: ?40°C to +85°C

Available in 8-lead (ADN4691E/ADN4696E) and 14-lead (ADN4693E/ADN4697E) SOIC packages

APPLICATIONS

Backplane and cable multipoint data transmission

Multipoint clock distribution

Low power, high speed alternative to shorter RS-485 links

Networking and wireless base station infrastructure