PGA2500 增益范围：0dB，10dB 至 65dB（1dB/步）

The PGA2500 is a digitally controlled, analog microphone preamplifier designed for use as a front end for highperformance audio analog-to-digital (A/D) converters. The PGA2500 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 PGA2500 features a gain range of 10dB through 65dB (1dB/step), along with a unity gain setting. The wide gain range allows the PGA2500 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 PGA2500 devices

	PGA2500
Equivalent Input Noise (EIN) withGain = 30dB (dB)	-128
THD+N with Gain = 30dB (percent)	0.0004
Gain Range (dB)	0dB, and 10dB to 65dB in 1dB steps
Input Type	Bipolar
Output Offset (+/-) (Max) (uV)	40
Quiescent Current (+/-) (Typ) (mA)	30
Pin/Package	28SSOP
Approx. Price (US$)	7.95 \| 1ku

PGA2500 特性

Fully Differential Input-to-Output Architecture
Digitally Controlled Gain Using Serial Port Interface:
- Gain Range: 10dB through 65dB, 1dB per step
- Unity (0dB) Gain Setting via Serial Port or Dedicated Control Pin
Dynamic Performance:
- Equivalent Noise with ZS = 150 and Gain = 30dB: –128dBu
- Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0004%
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 PGA2500 Devices
Dedicated Input Pin for Selecting Unity Gain
Overload Output Pin Provides Clipping Indication
Four General-Purpose Digital Output Pins
Requires ±5V Power Supplies
Available in an SSOP-28 Package
APPLICATIONS
- Microphone Preamplifiers and Mixers

PGA2500 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
PGA2500IDB	ACTIVE	-40 to 85	9.55 \| 1ku	SSOP (DB) \| 28	50 \| TUBE
PGA2500IDBG4	ACTIVE	-40 to 85	9.55 \| 1ku	SSOP (DB) \| 28	50 \| TUBE
PGA2500IDBR	ACTIVE	-40 to 85	7.95 \| 1ku	SSOP (DB) \| 28	1000 \| LARGE T&R
PGA2500IDBRG4	ACTIVE	-40 to 85	7.95 \| 1ku	SSOP (DB) \| 28	1000 \| LARGE T&R

PGA2500 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
PGA2500IDB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2500IDB	PGA2500IDB
PGA2500IDBG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2500IDBG4	PGA2500IDBG4
PGA2500IDBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2500IDBR	PGA2500IDBR
PGA2500IDBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	PGA2500IDBRG4	PGA2500IDBRG4