PCM2912A 具有 USB 接口、单声道麦克风输入和立体声耳机输出的音频编解码器

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB 2.0-compliant full-speed protocol controller and an analog front-end (AFE) function for headset applications. The USB protocol controller works with no software code, but USB descriptors can be modified on requestThe descriptor can be modified by changing a mask; contact your local representative for details.. The PCM2912A employs SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.

	PCM2901	PCM2904	PCM2912A
SNR DAC / SNR ADC (Typ) (dB)	96 / 89	96 / 89	92 / 92
# DACs / # ADCs	2 / 2	2 / 2	2 / 1
# Inputs / # Outputs	2 / 2	2 / 2	1 / 2
Sampling Rate (Max) (kHz)	48	48	48
Resolution (Bits)	16	16	16
Control Interface	HID	HID	H/W
Supply Voltage(s) (V)	3.3	5	5
Pd (Typ) (mW)	178	280	425
Additional Features		500mA Max Power Configuration	USB Interface, Mic Bias, PGAs, Sidetone
Operating Temperature Range (C)	0 to 70	-25 to 85	-25 to 85
Pin/Package	28SSOP	28SSOP	32TQFP
Approx. Price (US$)	4.45 \| 1ku	4.45 \| 1ku	4.50 \| 1ku

PCM2912A 特性

On-Chip USB Interface:
- With Full-Speed Transceivers
- Fully Compliant with USB 2.0 Specification
- Certified By USB-IF
- Partially Programmable Descriptors
- Adaptive Isochronous Transfer for Playback
- Asynchronous Isochronous Transfer for Record
- Bus Powered
16-Bit Delta-Sigma ADC and DAC
Sampling Rate:
- 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
On-Chip Clock Generator:
- With Single 6-MHz Clock Source
Mono ADC with Microphone Input
- Analog Performance at VBUS = 5 V:
  - THD+N: 0.01%
  - SNR: 92 dB
  - Dynamic Range: 90 dB
- Decimation Digital Filter
  - Passband Ripple: ±0.05 dB

PCM2912A 芯片订购指南

器件	状态	温度	价格（美元）	封装 \| 引脚	封装数量 \| 封装载体	丝印标记
PCM2912APJT	ACTIVE	-25 to 85	5.35 \| 1ku	TQFP (PJT) \| 32	250 \| JEDEC TRAY (10+1)
PCM2912APJTR	ACTIVE	-25 to 85	4.50 \| 1ku	TQFP (PJT) \| 32	1000 \| LARGE T&R

PCM2912A 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
PCM2912APJT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	PCM2912APJT	PCM2912APJT
PCM2912APJTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	PCM2912APJTR	PCM2912APJTR

PCM2912A 工具与软件

培训内容	型号	软件/工具类型
PCM2912A 评估模块	PCM2912AEVM-U	开发电路板/EVM