PGA2505 增益范围：0dB 和 9dB 至 60dB，3dB 步进

The PGA2505 is a digitally-controlled, analog microphone preamplifier designed for use as a front-end for high-performance audio analog-to-digital converters (ADCs). The PGA2505 features include low noise, wide dynamic range, and a differential signal path. An on-chip dc servo loop is employed to minimize dc offset, while a common-mode servo function may be used to enhance common-mode rejection.

The PGA2505 features a gain range of 9dB through 60dB (3dB/step), along with a unity gain setting. The wide gain range allows the PGA2505 to be used with a variety of microphones. Gain settings and internal functions are programmed using a 16-bit control word, which is loaded using a simple serial port interface. A serial data output pin provides support for daisy-chained connection of multiple PGA2505 devices

	PGA2505
Equivalent Input Noise (EIN) withGain = 30dB (dB)	-123
THD+N with Gain = 30dB (percent)	0.0006
Gain Range (dB)	9dB through 60dB, in 3dB steps
Input Type	Fully Differential
Quiescent Current (+/-) (Typ) (mA)	30
Pin/Package	24SSOP
Approx. Price (US$)	4.95 \| 1ku

PGA2505 特性

FULLY DIFFERENTIAL lNPUT-TO-OUTPUT ARCHITECTURE
DIGITALLY-CONTROLLED GAIN USING SPI™:
- Gain Range: 9dB through 60dB, 3dB per Step
- Unity (0dB) Gain Setting via Serial Port
DYNAMIC PERFORMANCE:
- Equivalent Input Noise with ZS = 150 and Gain = 30dB: -123dBu
- Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0006%
ZERO CROSSING DETECTION MINIMIZES AUDIBLE ARTIFACTS WHEN GAIN SWITCHING
INTEGRATED DC SERVO MINIMIZES OUTPUT OFFSET VOLTAGE
COMMON-MODE SERVO IMPROVES CMRR
FOUR-WIRE SERIAL CONTROL PORT INTERFACE:
- Simple Interface to Microprocessor or DSP Serial Ports
- Supports Daisy-Chaining of Multiple PGA2505 Devices
OVER-RANGE OUTPUT PIN PROVIDES CLIPPING INDICATION
FOUR GENERAL-PURPOSE DIGITAL OUTPUT PINS
±5V POWER SUPPLIES
AVAILABLE IN AN SSOP-24 PACKAGE
APPLICATIONS
- MICROPHONE PREAMPLIFIERS AND MIXERS
- DIGITAL MIXERS AND RECORDERS

PGA2505 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
PGA2505IDB	ACTIVE	-40 to 85	5.95 \| 1ku	SSOP (DB) \| 24	60 \| TUBE
PGA2505IDBR	ACTIVE	-40 to 85	4.95 \| 1ku	SSOP (DB) \| 24	2000 \| LARGE T&R

PGA2505 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
PGA2505IDB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2505IDB	PGA2505IDB
PGA2505IDBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2505IDBR	PGA2505IDBR