LTC1400CS8#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1400CS8#TRPBF is a complete 12-bit, 400ksps analog-to-digital converter in an 8-lead SOIC package. It operates from single 5V or ±5V supplies with typical power dissipation of 75mW at full speed. The device integrates a 200ns sample-and-hold circuit and a precision 2.42V internal reference. Key electrical specifications include ±1LSB INL/DNL, 72dB S/(N+D) at Nyquist, and a 3-wire serial interface compatible with DSPs. Power management features include Nap mode (6mW) for instant wake-up and Sleep mode (30μW).

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Successive approximation architecture with no missing codes over temperature.
• High Speed Sampling: 400ksps throughput with 4MHz full power bandwidth.
• Low Power Modes: Nap mode consumes 6mW; Sleep mode reduces consumption to 30μW.
• Integrated Reference: Factory-trimmed 2.42V bandgap reference with external overdrive capability.

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Digital signal processing front-ends
• Multiplexed measurement instruments
• Audio and telecom signal conditioning

Analog To Digital Converters (ADC) Procurement Notes

Verify the #TRPBF suffix confirms tape and reel packaging and lead-free compliance. Confirm the 'C' grade designation matches the required 0°C to 70°C operating temperature range. Ensure the source document explicitly lists this part number as available from Analog Devices Inc. distributors.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring moderate resolution (12-bit) at high speeds (400ksps) with low power constraints. Choose bipolar operation if negative input voltages are needed, utilizing the VSS pin. For unipolar applications, tie VSS to GND. Ensure the driving amplifier can settle within the 200ns acquisition time.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1400 family of complete ADCs. The CS8 variant denotes the commercial temperature range and SOIC-8 plastic package. The #TRPBF suffix indicates the specific ordering configuration for tape and reel supply with RoHS-compliant finishes.

Analog To Digital Converters (ADC) Replacement Considerations

Direct substitutes must maintain 12-bit resolution, 400ksps sampling rate, and SOIC-8 packaging. Verify pin compatibility for VCC, AIN, VREF, GND, DOUT, CLK, CONV, and VSS. Check that replacement devices support similar power modes and serial interface timing requirements.

Analog To Digital Converters (ADC) FAQ

How does the LTC1400 handle bipolar vs. unipolar input ranges?

The device automatically detects the mode based on the VSS pin voltage. If VSS is connected to GND, it operates in unipolar mode (0V to 4.096V). If VSS is connected to -5V, it switches to bipolar mode (±2.048V).

What is the wake-up time from Sleep mode?

Upon waking from Sleep mode, the device requires approximately 4ms for the internal reference to settle. The REFREADY bit in the serial data word indicates when the reference is stable and conversion can begin.

Can the internal reference be overridden?

Yes, the VREF pin can be driven externally by a DAC or precision reference to adjust the input span. The external voltage must be at least 2.45V to prevent conflict with the internal reference but should not exceed 5V.