Features: `2.5 V Mono Audio Codec with 3.3 V Tolerant
`Digital Interface
`Supports 8 kHz to 48 kHz Sample Rates
`Supports 16-/20-/24-Bit Word Lengths
`Multibit - Modulators with
`"Perfect Differential Linearity Restoration" for
`Reduced Idle Tones and Noise Floor
`Data Directed Scrambling DAC Least Sensitive to Jitter
`Performance (20 Hz to 20 kHz)
85 dB ADC Dynamic Range
93 dB DAC Dynamic Range
`Programmable ADC Gain
`On-Chip Volume Control for DAC Channel
`Software Controllable Clickless Mute
`Supports 256* fS, 512 * fS, and 768 * fS Master Mode Clocks
`Master Clock Prescaler for Use with DSP Master Clocks
`On-Chip Reference
`16-Lead TSSOP PackageApplication·Digital Video Camcorders (DVC)
·Portable Audio Devices (Walkman®, PDAs, and so on)
·Audio Processing
·Voice Processing
·Telematic Systems
·General-Purpose Analog I/OPinout
Specifications
| # ADC |
1 |
| # DAC |
1 |
| ADC Dynamic Range (dB) |
85dB |
| ADC SNR (dB) |
77dB |
| DAC Dynamic Range (dB) |
93dB |
| DAC SNR (dB) |
89dB |
| THD+N (dB) |
ADC: -67,DAC: -88 |
| Product Description |
Low Cost Mono Audio Codec |
AVDD, DVDD2 to AGND, DGND . . . . . . . 0.3 V to +3.0 V
DVDD1 to AGND, DGND . . . . . . . . . . . . . 0.3 V to +4.5 V
AGND to DGND . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
Digital I/O Voltage to DGND . . . 0.3 V to DVDD1 + 0.3 V
Operating Temperature Range
Automotive (Y Version) . . . . . . . . . . . .40°C to +105°C
Storage Temperature Range . . . . . . . 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150°C
16-Lead TSSOP, JA Thermal Impedance . . . . .150.4°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . .. 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°CDescriptionThe AD74111 is a front-end processor for general-purpose audio and voice applications. It features a multibit - A/D conversion channel and a multibit - D/A conversion channel. The ADC channel provides >67 dB THD+N and the DAC channel provides >88 dB THD+N, both over an audio signal bandwidth.
The AD74111 is particularly suitable for a variety of applications where mono input and output channels are required, including audio sections of digital video camcorders, portable personal audio devices, and telematic applications.
AD74111's high quality performance also makes it suitable for speech and telephony applications such as speech recognition and synthesis, and modern feature phones.
An on-chip reference voltage is included but can be powered down and bypassed by an external reference source if required. The AD74111 offers sampling rates that, depending on MCLK selection and MCLK divider ratio, range from 8 kHz in the voiceband range to 48 kHz in the audio range. The AD74111 is available in a 16-lead TSSOP package option and is specified for the automotive temperature range of 40°C to +105°C.
AD74111 Data Sheet
